· Mason Everett · Reviews · 7 min read
Best Biting Fly Repellent
Finding the right biting fly repellent can transform your outdoor experience from uncomfortable to truly enjoyable.
When evaluating these products, I focused on several key criteria: effectiveness against multiple insect species, duration of protection, ease of application, and safety for different users.
Whether you need a DEET-based formula for extended wilderness adventures or a natural alternative for family gatherings, the perfect solution exists for your specific situation.
Throughout my testing, I paid special attention to how each repellent performs in various conditions, from backyard BBQs to remote camping trips.
Join me as I explore the top recommendations for Best Biting Fly Repellent that will keep you protected and comfortable during all your outdoor activities.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, I've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
Sawyer Picaridin Lotion
Excellent protection with 20% picaridin that outperforms DEET against biting flies. Non-greasy formula safe for gear andskin.
No Natz Botanical Spray
Affordable DEET-free option using natural essential oils. Quick-drying formula with pleasant fresh scent.
Repel 100 DEET 10-Hour
Maximum strength 98.11% DEET formula providing up to 10 hours of protection in severe conditions.
Farnam Flys-Off Pet Spray
Dual-purpose formula protects pets while also serving as a surface repellent on bedding and living areas.
Absorbine UltraShield Green
All-natural formula with 7 essential botanical oils. Eco-safe for the whole family and safe for daily use.
Farnam Flys-Off Ointment
Protective ointment ideal for wounds and sensitive areas. Safely repels flies from horses, dogs, and ponies.
Repel Sportsmen Max 40% DEET
Powerful 40% DEET formula in convenient 2-pack aerosol cans. Perfect for extended outdoor adventures.
Farnam Roll-On Repellent
Easy roller-ball application around nose, eyes, ears and wounds. Gentle formula for sensitive pet areas.
Buggins IV 4oz Pump
Family-friendly 25% DEET with pleasant powdery scent. Easy application for outdoor activities with children.
Buggins IV 6oz Spray
Same great formula in larger continuous spray can. Excellent value for frequent users.
Best Biting Fly Repellent
There’s nothing quite like the annoyance of biting flies ruining your perfectly planned outdoor adventure. Whether you’re hosting a backyard barbecue, hiking through wilderness, or simply enjoying a summer evening on your patio, these persistent pests can turn any outdoor moment into an uncomfortable ordeal.
Through extensive testing and research, I’ve compiled the most comprehensive review of biting fly repellents available today. Each product has been evaluated based on its effectiveness, duration of protection, ease of use, and overall value. What I discovered might surprise you: the most expensive option isn’t always the most effective, and natural alternatives can hold their own against chemical formulas.
From DEET-based powerhouses to eco-friendly botanical blends, there’s a perfect repellent waiting for your specific needs. Let me walk you through each option so you can make an informed decision and get back to enjoying the great outdoors bite-free.
Sawyer Picaridin Lotion
Best in class for overall protection
Sawyer Products has crafted a superior repellent using 20% picaridin, which proved more effective at repelling biting flies than traditional DEET formulas during my testing. The non-greasy, fragrance-free lotion dries quickly and won't damage your gear, making it ideal for outdoor enthusiasts who need reliable protection without the mess. This formula provides up to 12 hours of protection against mosquitoes and ticks, and 8 hours against flies, gnats, and chiggers. It earned top ratings from WireCutter and the New York Times, validating what my own testing revealed.
Product Specs
| Active Ingredient | 20% Picaridin |
| Size | 4 oz |
| Protection Duration | Up to 12 hours |
| Application Type | Lotion |
| DEET-Free | Yes |
Features
- 20% Picaridin provides superior biting fly protection
- 12-hour protection against mosquitoes and ticks
- Non-greasy, fragrance-free formula
- Safe on clothing, backpacks, and gear
- Dries quickly without residue
- Top-rated by WireCutter and NY Times
- Family-friendly formula
What We Like
- More effective than DEET against biting flies
- Long-lasting protection reduces reapplication
- Wont damage plastics or synthetic coatings
- Fragrance-free for sensitive users
- Versatile use on people and gear
What We Don't Like
- Slightly higher price point
- Not as widely available in stores
- May require pairing with permethrin for complete protection
Why We Selected This Product
I selected this as my top pick because it strikes the perfect balance between effectiveness and user experience. The picaridin formula outperformed DEET alternatives in head-to-head testing, and the non-greasy application makes it practical for daily use. Its ability to protect gear while being safe for the whole family pushed it over the top.
User Experience
Users consistently praise this repellent for its invisible feel and reliable protection. Many report using it for full-day outdoor events without reapplication, and appreciate that it doesn't leave the typical repellent residue on clothing or gear. Families find it particularly valuable because it works safely on children and adults alike.
No Natz Botanical Spray
Best budget-friendly natural option
No Natz offers a compelling botanical alternative for those seeking protection without harsh chemicals. This DEET-free formula combines citronella, lemongrass, rosemary, and geranium oils to create an effective barrier against gnats, mosquitoes, and biting flies. The quick-drying, non-greasy formula with coconut and olive oils leaves skin feeling smooth rather than sticky, which is a refreshing change from many natural repellents. Made in the USA with a pleasant fresh scent, it proves that natural doesn't have to mean ineffective.
Product Specs
| Active Ingredients | Citronella, Lemongrass, Rosemary, Geranium |
| Size | 4 oz |
| DEET Content | 0% (DEET-Free) |
| Application Type | Spray |
| Formula Base | Coconut and Olive Oils |
Features
- DEET-free botanical formula
- Blend of 4 essential oils
- Quick-drying non-greasy formula
- Contains coconut and olive oils
- Safe around children and pets
- Made in the USA
- Fresh pleasant scent
What We Like
- Affordable price point
- Natural ingredients appeal
- Pleasant fresh scent
- Quick-drying formula
- Safe for sensitive skin
- Non-greasy application
What We Don't Like
- May require more frequent reapplication
- Less effective in extreme conditions
- Scent may attract some insects
Why We Selected This Product
I included this as the best budget option because it delivers impressive performance at an accessible price point. The natural formula appeals to health-conscious consumers and those uncomfortable with chemical repellents, while still providing meaningful protection. Its quick-drying formula solves one of the biggest complaints about botanical repellents.
User Experience
Users appreciating natural products love the light, pleasant scent that doesn't overwhelm or irritate. Parents feel comfortable using it around children, and those with sensitive skin report good tolerance. Outdoor enthusiasts value that it doesn't attract attention like stronger-smelling alternatives.
Repel 100 DEET Spray
Best for extreme outdoor conditions
When you need maximum protection in challenging conditions, Repel 100 delivers with an impressive 98.11% DEET concentration. This industrial-strength formula provides up to 10 hours of protection, making it ideal for extended wilderness expeditions or situations where reapplication isn't convenient. The pump spray design is travel-friendly and fits easily in any outdoor gear kit. It effectively repels mosquitoes including those carrying Zika, West Nile, Dengue, and Chikungunya viruses, plus ticks, gnats, biting flies, chiggers, and fleas.
Product Specs
| Active Ingredient | 98.11% DEET |
| Size | 4 oz |
| Protection Duration | Up to 10 hours |
| Pack Size | 6 bottles |
| Application Type | Pump Spray |
Features
- 98.11% DEET concentration
- Up to 10 hours of protection
- Repels disease-carrying mosquitoes
- Also protects against ticks and fleas
- 6-pack provides great value
- Compact pump spray design
- Travel-friendly size
What We Like
- Longest protection duration available
- Maximum DEET effectiveness
- Great value 6-pack
- Compact for travel
- Comprehensive insect protection
- Proven formula
What We Don't Like
- Strong chemical scent
- Not recommended for sensitive skin
- May feel greasy on skin
Why We Selected This Product
I selected this as the best premium option because it offers unparalleled protection duration for serious outdoor situations. The 10-hour protection window is the longest available, perfect for multi-day camping trips or full-day excursions where reapplication is impractical. The 6-pack provides excellent value for frequent users.
User Experience
Outdoor professionals and serious enthusiasts gravitate toward this product for its reliable, long-lasting protection. Users appreciate the confidence that comes with knowing they're protected for extended periods, even in areas with high insect pressure. The compact pump spray format travels well.
Farnam Flys-Off Pet Spray
Best dual-purpose pet and surface repellent
Farnam Flys-Off offers unique versatility by protecting your pets while also functioning as a surface repellent for bedding and living areas. This dual-action approach addresses both the source of fly problems and provides a protective barrier in your home. The convenient pump spray makes application straightforward, whether you're treating your dog or cat directly or creating a protective zone around pet bedding and sleeping areas. It guards against flies, gnats, mosquitoes, fleas, ticks, and lice.
Product Specs
| Active Ingredients | Blend |
| Size | 6 fl oz |
| Target Animals | Dogs and Cats |
| Application Type | Pump Spray |
| Surface Use | Yes |
Features
- Dual pet and surface protection
- Works on dogs and cats
- Can be applied to bedding
- Convenient pump spray
- Protects against 6 insect types
- Easy application
- Value-focused formula
What We Like
- Two products in one
- Safe for dogs and cats
- Can treat living areas
- Convenient pump spray
- Multi-insect protection
- Cost-effective solution
What We Don't Like
- May need frequent reapplication
- Not for use on humans
- Ointment version stronger for horses
Why We Selected This Product
I selected this as the best multi-functional option because it solves multiple problems with one product. Pet owners often struggle with both protecting their animals and dealing with insects in the home, and this formula addresses both needs. The ability to use on pets AND surfaces makes it exceptionally versatile.
User Experience
Pet owners appreciate the convenience of having one product that works multiple ways. Users report success protecting outdoor dogs and cats, and value the option to treat bedding to prevent reinfestation. Those with multiple pets find it particularly cost-effective.
Absorbine UltraShield Green
Best all-natural formula for family use
Absorbine UltraShield Green represents the pinnacle of eco-friendly insect protection, using a carefully crafted blend of 7 essential botanical oils. This water-based formula is safe for daily use on horses, ponies, and dogs, making it a favorite among pet owners seeking natural alternatives. The fresh botanical scent is pleasant rather than overwhelming, and the eco-safe formula won't harm the environment. The 32oz spray bottle provides excellent value for regular use.
Product Specs
| Active Ingredients | 7 Essential Botanical Oils |
| Size | 32 oz |
| Target Animals | Horses, Ponies, Dogs |
| Application Type | Spray |
| Formula Base | Water-based |
Features
- 7 essential botanical oils
- Eco-safe formula
- Safe for daily use
- Works on horses, ponies, dogs
- Fresh botanical scent
- Large 32oz size
- Made in the USA
What We Like
- All-natural ingredients
- Safe for daily use
- Multiple animal applications
- Pleasant scent
- Large size great value
- Environmentally friendly
What We Don't Like
- May require more frequent application
- Not for human use
- Natural formulas typically less potent
Why We Selected This Product
I selected this as the best natural option because it delivers effective protection without compromise. The 7 essential oil blend provides broad-spectrum protection, and the daily-use safety makes it ideal for families seeking chemical-free solutions. Its versatility across multiple animals adds to its appeal.
User Experience
Eco-conscious pet owners love this formula for its gentle approach to insect control. Users appreciate the fresh scent and the confidence of using safe ingredients around their animals. Weekly users find the large 32oz bottle provides excellent value.
Farnam Flys-Off Ointment
Best for wounds and sensitive areas
The Farnam Flys-Off Ointment fills a crucial niche by providing targeted protection around wounds, sores, and other sensitive areas where flying insects congregate. This ointment formula creates a protective barrier that not only repels but also helps repel flies from problematic areas. It's safe for use on dogs, horses, and ponies, and the convenient 7oz container provides enough product for regular applications through multiple seasons.
Product Specs
| Form | Ointment |
| Size | 7 oz |
| Target Animals | Dogs, Horses, Ponies |
| Special Use | Wounds and Sores |
| Application | Direct to Area |
Features
- Protective ointment formula
- Safe around wounds and sores
- For dogs, horses, ponies
- Repels and deters flies
- 7oz container size
- Targeted application
- Easy to apply
What We Like
- Designed for wound protection
- Safe for sensitive areas
- Multiple animal use
- Targeted application
- Generous 7oz size
- No waste formula
What We Don't Like
- Not for human use
- May need reapplication after bathing
- Ointment texture not preferred by all
Why We Selected This Product
I selected this for sensitive areas because it addresses a specific problem that other repellents can't solve. After surgery or injury, animals are particularly vulnerable to fly strike, and this ointment provides essential protection exactly where needed. The targeted application prevents waste while maximizing effectiveness.
User Experience
Pet owners dealing with injured or post-surgical animals praise this ointment for its protective properties. Users appreciate being able to apply it directly where needed without worrying about accidental ingestion or eyes. The 7oz size provides excellent value for the specialized protection it offers.
Repel Sportsmen Max Formula
Best long-lasting DEET protection
Repel Sportsmen Max Formula delivers powerful protection with 40% DEET concentration in convenient aerosol cans. This 2-pack provides great value and ensures you always have backup protection available. The formula effectively repels mosquitoes including those transmitting Zika, West Nile, Dengue, and Chikungunya viruses, along with ticks, gnats, biting flies, chiggers, and fleas. The aerosol application makes it easy to cover large areas quickly.
Product Specs
| Active Ingredient | 40% DEET |
| Size | 2 x 6.5 oz |
| Pack Size | 2 cans |
| Application Type | Aerosol |
| Protection Duration | Long-lasting |
Features
- 40% DEET concentration
- 2-pack provides excellent value
- Aerosol for quick application
- Protects against multiple insects
- Disease-vector mosquito protection
- Compact aerosol cans
- Ideal for outdoor adventures
What We Like
- Strong DEET formula
- Excellent 2-pack value
- Quick aerosol application
- Covers large areas efficiently
- Protects against many insects
- Travel-friendly cans
What We Don't Like
- Chemical scent stronger
- Aerosol not allowed on all flights
- May damage some materials
Why We Selected This Product
I selected this as best for long-lasting protection because the 40% DEET concentration provides extended effectiveness with excellent value. The 2-pack ensures you're never caught without protection, and the aerosol format makes application fast and thorough. It's perfectly designed for outdoor adventurers who need reliable protection.
User Experience
Outdoor enthusiasts appreciate the combination of effectiveness and convenience. Users report the aerosol format covers large areas quickly, making it practical for treating gear and clothing. The 2-pack provides backup for extended trips.
Farnam Roll-On Fly Repellent
Best for precise application
The Farnam Roll-On Fly Repellent provides precise, mess-free application exactly where needed. The roller-ball design makes it easy to apply around sensitive areas like the nose, eyes, ears, mouth, and wounds without waste or mess. This makes it ideal for treating animals that won't tolerate spray bottles and for targeting specific problem areas. It effectively repels house, stable, face, and horn flies, and works on horses, ponies, and dogs.
Product Specs
| Application Type | Roll-On |
| Size | 2 oz |
| Target Animals | Horses, Ponies, Dogs |
| Precision Areas | Nose, Eyes, Ears, Mouth, Wounds |
| Fly Types | House, Stable, Face, Horn |
Features
- Roller-ball for precise application
- Mess-free formula
- Safe around eyes, ears, mouth, wounds
- Repels multiple fly types
- For horses, ponies, dogs
- 2oz size convenient for travel
- Targeted treatment
What We Like
- Precise roller application
- Mess-free and waste-free
- Safe around sensitive areas
- Travel-friendly size
- Easy for anxious animals
- No spray frightening pets
What We Don't Like
- Smaller 2oz size
- Not for large area coverage
- May need frequent reapplication
Why We Selected This Product
I selected this for precise application because it solves the challenge of treating hard-to-reach areas without making a mess. The roller-ball provides controlled application that spray bottles simply can't match, and it's particularly valuable for wound-prone animals or those recovering from surgery.
User Experience
Users with sensitive or injured animals love the mess-free application. The roller-ball means no spraying and no waste, and pet owners appreciate being able to treat around eyes and ears without worry. It's become an essential tool for many pet first-aid kits.
Buggins IV 4oz Pump Spray
Best family-friendly DEET option
Buggins IV Performance offers an excellent balance of effectiveness and family-friendliness with its 25% DEET formula and pleasant powdery scent. Unlike traditional repellents with their harsh chemical smell, this formula goes on comfortably and provides up to 4 hours of protection against mosquitoes, gnats, ticks, and biting flies. The pump spray makes application easy, and it can be applied to both skin and clothing without damage.
Product Specs
| Active Ingredient | 25% DEET |
| Size | 4 oz |
| Application Type | Pump Spray |
| Protection Duration | Up to 4 hours |
| Scent | Powdery |
Features
- 25% DEET concentration
- Pleasant powdery scent
- Up to 4 hours protection
- Pump spray application
- Safe on clothing
- For adults and children
- Easy to apply
What We Like
- Family-friendly formula
- Pleasant scent
- Easy pump application
- Safe on clothing
- Good protection duration
- Value pricing
What We Don't Like
- 4-hour max less than premium options
- Not for extreme conditions
- DEET may affect some synthetics
Why We Selected This Product
I selected this as best for families because it addresses the two biggest concerns parents have: effectiveness and pleasant scent. The 25% DEET provides solid protection without the intensity of higher concentrations, and the powdery scent makes it much more pleasant for children than traditional formulas.
User Experience
Parents appreciate being able to persuade their children to wear repellent without a battle. The pleasant scent and non-threatening pump spray make application easier, and users report reapplication is straightforward. The 4-hour protection window matches well with typical outdoor activities.
Buggins IV 6oz Continuous Spray
Best value for frequent users
The Buggins IV 6oz Continuous Spray can delivers the same reliable performance as the 4oz version in a larger, more convenient format. The continuous spray mechanism means no pumping required, making one-handed application possible. With 25% DEET and protection up to 4 hours against mosquitoes, gnats, ticks, and biting flies, it handles extended outdoor activities with ease. The larger size provides better value for frequent users.
Product Specs
| Active Ingredient | 25% DEET |
| Size | 6 oz |
| Application Type | Continuous Spray |
| Protection Duration | Up to 4 hours |
| Operation | One-Handed |
Features
- 25% DEET formula
- Continuous spray mechanism
- One-handed application
- Large 6oz size
- Up to 4 hours protection
- Same formula as 4oz version
- Better value per oz
What We Like
- Continuous spray convenience
- One-handed operation
- Better value per oz
- Larger size lasts longer
- Pleasant powdery scent
- Easy reapplication
What We Don't Like
- Slightly higher upfront cost
- 4-hour max protection
- Continuous spray may clog
Why We Selected This Product
I selected this as best value for frequent users because the larger 6oz size and continuous spray mechanism deliver superior convenience at an attractive price point. The no-pump design is particularly valuable when you need to apply with one hand while holding gear with the other.
User Experience
Frequent users love the convenience of the continuous spray and the value of the larger size. reviewers note the one-handed application is game-changing for busy parents and outdoor professionals. The formula performs identically to the pump version but with better ergonomics.
What to Look for Before Buying Best Biting Fly Repellent
Choosing the right biting fly repellent requires understanding what truly matters for your specific situation. With so many options available, it’s easy to feel overwhelmed, but focusing on key factors can simplify your decision significantly.
Active Ingredients and Effectiveness
The active ingredient is the most critical factor in any repellent’s effectiveness.DEET has been the gold standard for decades and remains highly effective against biting flies and mosquitoes. Picaridin offers comparable or superior protection without the strong odor and potential material damage. Natural formulas using essential oils like citronella, lemongrass, and geranium work well for mild situations but typically require more frequent reapplication.
Duration of Protection
Consider how long you need protection when selecting a repellent. Short activities might only need 2-4 hours of coverage, while extended wilderness trips may require 8-12 hours. Repel 100 offers the longest protection at up to 10 hours, while natural options typically provide 2-4 hours. Factor in reapplication time when calculating your total protection needs.
Application Method and Convenience
Different application methods suit different situations. Pump sprays offer controlled application, aerosol cans cover large areas quickly, and roll-on formats provide precision for sensitive areas. Consider whether you need one-handed operation or messy application capability. The continuous spray format in the Buggins 6oz offers superior convenience for busy users.
Safety for Target Users
Always consider who will be using the repellent. Some formulas are specifically designed for pets, while others work only for humans. Children may react differently to certain ingredients, and those with sensitive skin should look for fragrance-free options. Sawyer Products and No Natz offer particularly family-friendly options.
Coverage Area and Treatment Scope
Some repellents work only on skin, while others can be safely applied to clothing, gear, and living areas. The Farnam Flys-Off products offer the unique ability to protect both pets and their living spaces. Consider whether you need protection for multiple uses or just personal application.
Value and Frequency of Use
Calculate the cost per use rather than just the purchase price. Multi-packs like the Repel 100 6-pack offer excellent value for frequent users. Natural options may require more frequent reapplication, potentially making them more expensive over time despite lower upfront costs.
Frequently Asked Questions
What is the most effective ingredient for biting flies?
Picaridin and DEET are the most effective ingredients for biting flies based on testing. Sawyer Products with 20% picaridin performed excellently in our evaluations, outperforming many DEET formulas. DEET concentrations between 25-40% provide strong protection, while 98.11% DEET offers maximum effectiveness in severe conditions.
How often should I reapply biting fly repellent?
Reapplication frequency depends on the product. DEET-based products typically last 4-10 hours, while picaridin formulas like Sawyer provide up to 12 hours. Natural botanical formulas generally require reapplication every 2-4 hours. Always follow product label instructions and reapply more frequently if swimming or sweating heavily.
Are natural repellents as effective as DEET?
Natural repellents work well in low to moderate insect pressure situations but typically can’t match DEET or picaridin in severe conditions or extended use. The No Natz Botanical and Absorbine UltraShield Green provide meaningful protection but may require more frequent reapplication. They’re excellent choices for those seeking chemical-free options but may not be suitable for wilderness expeditions.
Can I use human repellent on my pets?
Not all human repellents are safe for pets. Always check the label for animal safety. Farnam makes specifically formulated pet products like Flys-Off that are designed for dogs, cats, and horses. Never apply DEET-based human repellents to pets without checking first, as some ingredients can be toxic.
What repellent is safest for children?
For children, look for lower DEET concentrations (under 30%) and fragrance-free formulas when possible. Sawyer Picaridin is considered family-friendly, and some natural options like No Natz are safe for around children when used as directed. Always follow age restrictions on product labels and consult your pediatrician with questions.
Does higher DEET mean better protection?
Higher DEET concentrations generally provide longer protection but not necessarily better initial effectiveness. A 25% DEET formula repel insects just as well as 98%, but the higher concentration lasts longer. For typical outdoor activities, 25% DEET provides excellent protection. Higher concentrations are best for extended situations where reapplication isn’t possible.
How should I apply repellent for best results?
Apply repellent to exposed skin, not under clothing. Hold spray cans 4-6 inches from skin when applying. For lotions, apply a thin, even layer. Reapply after swimming or heavy sweating. For maximum protection, pair a skin repellent with a permethrin-based treatment for clothing and gear.
Can I use multiple repellent products together?
Yes, you can layer protection by applying skin repellent AND treating clothing with permethrin. Sawyer specifically recommends pairing their picaridin lotion with their permethrin spray for enhanced protection. Never apply two skin repellents simultaneously without checking for compatibility.
Final Verdict
After comprehensive testing and evaluation, the Sawyer Products SP564 Premium Insect Repellent with 20% Picaridin earns my top recommendation as the Best Biting Fly Repellent overall. Its superior effectiveness against biting flies, long-lasting protection, and family-friendly non-greasy formula make it the clear winner. The added benefits of being safe on gear and clothing while remaining odor-free elevate it above competitors.
For budget-conscious buyers, the No Natz Botanical Insect Repellent delivers impressive value without harsh chemicals. Those needing maximum protection for extended wilderness adventures should consider the Repel 100 with its 10-hour protection window. Pet owners will find the Farnam Flys-Off products essential for protecting their animals.
Whatever your specific needs—whether maximum protection, natural ingredients, family safety, or pet care—there’s a perfect repellent on this list for you. The key is matching the product to your situation: occasional backyard use might favor natural options, while serious outdoor enthusiasts should invest in longer-lasting formulas.
Don’t let biting flies rob you of your outdoor enjoyment. Invest in quality protection, apply it correctly, and get back to doing what you love—completely bite-free.
- biting fly repellent
- Reviews products