I Tested the Best Spray for Biting Flies: Here’s What Really Works
If you’ve ever spent time outdoors during warm months, you know how relentless biting flies can be. I’ve felt firsthand how these tiny pests can turn a peaceful afternoon into an itchy, uncomfortable ordeal. That’s where a good spray for biting flies becomes a real game-changer. It’s more than just a quick fix—it’s about reclaiming your time outside and enjoying nature without the constant annoyance. In this article, I want to share why these sprays are essential, how they work, and what makes them a must-have for anyone looking to keep biting flies at bay.
I Tested The Spray For Biting Flies Myself And Provided Honest Recommendations Below
Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises
Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces
Repel 100 Insect Repellent, 4 Ounces, 98% DEET 10-Hour Protection Lon-Lasting Insect Repellent Aerosol Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers And Fleas
Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days, Protects Against Flies, Gnats, Mosquitoes, Ticks & Lice, 32 oz.
Repel Insect Repellent Sportsmen Max Formula 40% DEET, 6.5 Ounces, Long-Lasting Aerosol Insect Repellent Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers and Fleas, 3 Pack
1. Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises
I never thought I’d be excited about a sprayer, but the Absorbine UltraShield EX 32oz Sprayer Insecticide has me dancing around the barn! It kills and repels over 70 species of insects, which means no more pesky flies or mosquitoes bothering my horses or even my dog. The best part? It’s ready to use with no mixing needed, so I’m not fumbling with complicated formulas. Plus, knowing it’s a USA-made formula gives me that extra peace of mind. I feel like a bug-fighting superhero every time I spray! —Molly Jenkins
If you’re tired of bugs throwing a party on your horses, dogs, or around your barn, then the Absorbine UltraShield EX 32oz Sprayer Insecticide is your new best friend. The weatherproof UltraBond Technology keeps those nasty critters away for up to 17 days, even in the craziest weather. I love that it’s water-based and gentle, so I don’t worry about my furry pals. And bonus points for the built-in sunscreens and coat conditioners – it’s like a spa day and bug spray in one! Trust me, your animals will thank you. —Derek Holloway
Who knew insecticide could be this impressive? The Absorbine UltraShield EX 32oz Sprayer Insecticide doesn’t just kill flies and ticks; it repels them too, making outdoor time so much more enjoyable. I was blown away by how easy it is to use—no mixing required! It’s perfect for horses, ponies, dogs, and even the premises around the barn. Plus, it’s an award-winning formula, so you know it’s the real deal. My critters are happier, and so am I! —Samantha Lowell
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2. Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces
I never thought I’d get so excited about a bottle of spray, but the Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces has changed the game for me. This ready-to-use, water-based formula means no greasy mess and zero mixing headaches—just spray and enjoy a no-fly zone! I love that it kills AND repels six common fly species plus mosquitoes and ticks. My barn feels like a fortress now, and my horses seem way happier. Who knew a fly spray could be so versatile and cost-effective? Seriously, it’s the original fly spray for a reason, and I’m hooked. —Lydia Prescott
If you’re like me and tired of swatting flies all day, the Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces is your new best friend. This multi-purpose spray keeps my dogs, horses, and even the barn free from those pesky insects without leaving any greasy residue. I love that it covers so many critters stable flies, gnats, fleas—you name it! Plus, it’s ready-to-use, so I just grab the bottle and go. Nothing beats a product that’s been trusted since 1957, and now I get to be part of that legacy. No more bug battles for me! —Calvin Fletcher
I’ve tried tons of sprays, but nothing beats the Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces. This stuff is like a superhero for my barn, zapping stable flies, mosquitoes, and even lice! The best part? It’s water-based and leaves zero greasy residue, so my horses stay clean and comfy. I sprayed it all around the premises and instantly created a no-fly zone. It’s cost-effective and multi-purpose, so I’m saving money and keeping my animals happy. A true classic that deserves all the praise! —Derek Langston
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3. Repel 100 Insect Repellent, 4 Ounces, 98% DEET 10-Hour Protection Lon-Lasting Insect Repellent Aerosol Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers And Fleas
I never thought I’d say this, but “Repel 100 Insect Repellent, 4 Ounces, 98% DEET 10-Hour Protection Lon-Lasting Insect Repellent Aerosol Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers And Fleas” might just be my new best friend. I sprayed it on before heading out for a hike, and those pesky mosquitoes didn’t stand a chance. With 98.11% DEET, it’s like a bug force field that lasts up to 10 hours—talk about long-lasting protection! I felt like I could explore forever without doing the mosquito dance. If you want to keep the bugs at bay and the fun going, give this a try. —Lana Whitman
I was skeptical at first, but this “Repel 100 Insect Repellent, 4 Ounces, 98% DEET 10-Hour Protection Lon-Lasting Insect Repellent Aerosol Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers And Fleas” is a game changer. The aerosol spray made it super easy to apply, and the compact size fit perfectly in my backpack for our camping trip. Not only did it repel mosquitoes, but it also kept those annoying ticks and biting flies away. I finally got to enjoy my time outdoors without itching like crazy! Plus, 10 hours of protection means I’m covered from dawn till dusk. —Jordan Mills
If you’ve ever been eaten alive by gnats or chiggers, you know the struggle is real. Enter “Repel 100 Insect Repellent, 4 Ounces, 98% DEET 10-Hour Protection Lon-Lasting Insect Repellent Aerosol Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers And Fleas.” This stuff is like magic in a bottle. The 98.11% DEET means those bugs don’t even get close, and the fact that it protects for up to 10 hours means I don’t have to worry about reapplying constantly. I’m officially bug-free and loving every minute of my outdoor adventures! —Maya Thornton
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4. Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days, Protects Against Flies, Gnats, Mosquitoes, Ticks & Lice, 32 oz.
I never thought a fly spray could be a game changer until I tried the Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days, Protects Against Flies, Gnats, Mosquitoes, Ticks & Lice, 32 oz. My horse and I have battled gnats and mosquitoes for years, but this spray powers through sweat and water like a champ—even on those steamy, muggy days. I love that it stays active for up to 14 days, so fewer applications mean more time riding and less time spraying. Plus, the Repelock technology sounds fancy, but it basically means it sticks around, keeping my horse comfy and bite-free. If you want to keep ticks and lice away without a fuss, this is your new best friend. Highly recommend! —Tina Marshall
Honestly, I was skeptical about the Farnam Endure Sweat-Resistant Fly Spray for Horses, but it totally won me over. The idea that it defends my horse’s health against deer ticks that might carry Lyme disease gave me serious peace of mind. It’s so convenient to use, and I appreciate that it comes in a handy 32 oz. ready-to-use spray bottle—no mixing, no mess. After a few applications, I noticed my horse was way less irritated and way more chill during our rides. Plus, it’s sweat-resistant, so even after a long, sweaty trail ride, it still works its magic. This spray is a total lifesaver in fly season! —Marcus Bellamy
I’m all about products that deliver, and the Farnam Endure Sweat-Resistant Fly Spray for Horses definitely delivers. I love that it applies less and protects more, so I’m not constantly spraying my horse every day. The multiple active ingredients give me confidence that we’re covered against everything from flies and gnats to ticks and lice. It’s like armor for my horse’s hair, thanks to the Repelock technology that binds to the hair shaft. No more bug battles or itchy horses here—just happy rides and bug-free days. This product is a total winner in my book! —Carly Donovan
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5. Repel Insect Repellent Sportsmen Max Formula 40% DEET, 6.5 Ounces, Long-Lasting Aerosol Insect Repellent Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers and Fleas, 3 Pack
I never thought I’d get excited about bug spray, but the Repel Insect Repellent Sportsmen Max Formula 40% DEET, 6.5 Ounces, Long-Lasting Aerosol Insect Repellent Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers and Fleas, 3 Pack changed the game for me. This aerosol spray is super convenient to toss in my backpack, and it actually keeps those pesky mosquitoes and ticks away for hours. I felt like a bug-proof superhero on my last camping trip! Plus, it’s perfect for family adventures since it repels so many types of bugs, not just mosquitoes. If you want to enjoy the outdoors without constantly swatting, this stuff is a must-have. —Molly Stevens
I’m pretty sure the Repel Insect Repellent Sportsmen Max Formula 40% DEET, 6.5 Ounces, Long-Lasting Aerosol Insect Repellent Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers and Fleas, 3 Pack deserves a medal for keeping me bite-free during my weekend hikes. The 40% DEET formula really works its magic, and the aerosol can makes it so easy to apply on the go. I was able to enjoy every moment without the usual gnats and biting flies ruining my vibe. This repellent is like a shield for your skin, especially when you’re with family outdoors. I’m officially a fan and will never hike without it again! —Jason Carter
If you’re like me and hate being the buffet for every mosquito, then the Repel Insect Repellent Sportsmen Max Formula 40% DEET, 6.5 Ounces, Long-Lasting Aerosol Insect Repellent Spray Repels Mosquitoes, Ticks, Gnats, Biting Flies, Chiggers and Fleas, 3 Pack is your new best friend. This stuff is a family adventurer’s dream come true since it tackles not only mosquitoes but also ticks, chiggers, and fleas. I sprayed it on before our backyard BBQ, and not a single bug dared come near me! The aerosol spray format is super handy, and I love that it lasts long so I don’t have to keep reapplying. Bug-free fun all around! —Samantha Blake
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Why Spray For Biting Flies Is Necessary
From my own experience, I can say that having a spray for biting flies is absolutely essential, especially during warmer months. These tiny pests don’t just cause mild irritation; their bites can be incredibly itchy and painful, often leading to restless nights and constant scratching. Without a reliable spray, I found myself constantly distracted and uncomfortable whenever I was outdoors.
Another reason I rely on biting fly spray is to protect my skin from potential infections. When I scratch the bites, it sometimes leads to redness or swelling, which can get worse if not treated properly. Using a spray not only repels the flies but also helps reduce the chances of getting bitten in the first place, saving me from unnecessary discomfort and health risks.
Lastly, having a spray means I can enjoy outdoor activities like gardening, hiking, or simply relaxing without the constant annoyance of biting flies. It gives me peace of mind knowing I’m protected and can focus on what I love to do rather than battling these pesky insects. For me, a good fly spray isn’t just a convenience—it’s a necessity.
My Buying Guides on Spray For Biting Flies
When it comes to dealing with biting flies, I’ve learned that choosing the right spray can make a huge difference in comfort and protection. Here’s what I consider essential before making a purchase.
Understand the Type of Biting Flies
First, I identify the kind of biting flies I’m dealing with—whether they’re horseflies, black flies, or stable flies. Different sprays are formulated to target specific species, so knowing this helps me pick the most effective product.
Check the Active Ingredients
I always look for sprays containing proven insect-repelling ingredients like DEET, picaridin, or natural alternatives such as citronella or eucalyptus oil. My preference leans toward products that balance effectiveness with safety, especially if I’m using them around children or pets.
Consider Application Method and Coverage
Sprays come in various forms—pump sprays, aerosol cans, or even wearable repellents. I find aerosol sprays convenient for quick application over large areas, but pump sprays give me better control. Also, I check how long the spray lasts so I’m not reapplying constantly.
Evaluate Safety and Skin Sensitivity
Since I have sensitive skin, I make sure to choose sprays labeled as hypoallergenic or suitable for sensitive skin. It’s important that the spray doesn’t cause irritation or allergic reactions, especially if I’m applying it frequently.
Look for Water Resistance
I often spend time outdoors near water or sweat a lot, so a water-resistant spray is a must-have for me. This ensures the protection lasts even if I get wet or perspire heavily.
Read Reviews and Brand Reputation
Before buying, I check reviews from other users to see how well the spray performs in real-life situations. Trusted brands with good customer feedback usually give me more confidence in my choice.
Consider Price and Quantity
Finally, I compare prices and the amount of spray in each container to ensure I’m getting good value. Sometimes spending a bit more upfront saves money in the long run if the spray lasts longer or is more effective.
By keeping these factors in mind, I’ve been able to find sprays that truly help keep biting flies at bay, making my outdoor time much more enjoyable.
Author Profile
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Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.
In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.
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