This is one of the best promo code sales on Frontier that we've seen in a while. Take up to 90% off the base fare for travel this fall and 75% off the base fare for winter travel. Fares start at just $37 roundtrip.
Use promo code SAVE90 when booking on FlyFrontier.com to take 90% off the base fare for nonstop domestic flights on Mondays, Tuesdays, Wednesdays, Thursdays, and Saturdays, from September 5 through October 4. Use promo code SAVE75 to take 75% off the base fare travel on Tuesdays, Wednesdays, and Saturdays, from October 6, 2018, through February 13, 2019. Avoid blackout dates November 15-28, and December 15, 2018, through January 5, 2019.
The discount does not apply to taxes nor Frontier's online booking fee, which is labeled a "Carrier Interface Charge". This means some routes still won't have a very big price drop even with the big sticker shock of 75-90% off. However, there are plenty of routes where we are seeing deep discounts. The discount can also be applied to one-way flights.
If you are unfamiliar with Frontier Airlines, please read our guide on Everything You Need to Know Before You Fly Frontier.
There are route exclusions for both the 90% off and the 75% off promo code sales. You may have to click around to find available dates since Frontier operates about half of the route network on just a few days each week. Click on the fare details for more info on exact dates each route is available.
Tickets must be booked by 11:59 pm ET, on August 29, 2018.
A sample of nonstop routes, which work with both sales (Lowest fare is for the 90% off sale)
A sample of nonstop fares that work only with the 90% off promo
A sample of nonstop fares that work only with the 75% off promo
Chicago to Harlingen $74 roundtrip New route announced today!
Denver to Harlingen $74 roundtrip New route announced today!
Many more routes are available and these fares all work in reverse as well. Lowest fares may not be available throughout the entire travel period. You'll have to decline all extras to get the lowest price.
Keep in mind that Frontier charges extra for any bags larger than a small personal item (small backpack, large purse, etc.). Pack super light to get the lowest price. Checked bag fees start at $25 each way. Larger carry-on bag fees start at $30 each way.
Above image by Colin A. Pierce via Shutterstock.