Flea season is in full swing, and the best way to keep your pet protected is by investing in the best flea treatment for dogs or the best flea treatment for cats – and right now, you can save $17 on both.
Parasites like fleas and ticks aren't just a nuisance; they can cause itching, irritation, and, in the worst cases, diseases like Lyme disease, which can have fatal consequences. That’s why stocking up on the right treatment and applying it regularly is one of the most important things you can do for your animal.
As pet parents, we've tested countless flea treatments over the years as a team, and one of our favorite trusty brands is Frontline, who cater to both cats and dogs. So we were pleased to see they’re offering a 37% discount in the Amazon Prime Day sale – but we're not sure how long it will be here for.
These spot-on solutions are applied to the back of your pet's neck and will quickly start to kill existing fleas, eggs, larvae, lice, and ticks, while also preventing any further infestations. After 24 hours, the dose becomes waterproof for 30 days, so you won’t need to worry about it washing off at bath time or when they go outside.
Each pack contains three doses, offering 90 days of protection for your pet – giving you peace of mind that they won't catch anything on their adventures.
While you can also try oral tablets or shampoos, we’ve found that topical treatments like this one are the easiest to apply and often work the quickest. However, if you’d prefer an alternative method, I’ve also spotted the Seresto Cat Flea Prevention Collar and Seresto Dog Flea Prevention Collar at 25% off today.
Buying flea treatment isn’t the most exciting purchase you’ll make, which is why we like to stock up while the sales are on – and recommend you do the same.
Want to learn more? Read the difference between flea medicine vs flea collars and discover the safest flea treatment for dogs. Or, find out how PetsRadar finds the best deals.
Megan Milstead has been a Staff Writer at PetsRadar since 2023, covering deals, buying guides, reviews and features. She has four cats named Chilli, Nala, Tofu and Polpetta who are reguarly protected against fleas and other parasites. She holds a Journalism degree from the University of Westminster, an extended diploma from West Herts College, and is currently completing an online course in cat and dog behavior from the University of Edinburgh.
Edited by Georgia Guerin.
This page was last updated in July 2025 by Megan Milstead.
