Frontier Airlines Sale: 50% Off Base Fare [Ends April 25]

Updated: April 14, 2025, 9:43am CDT

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Save 50% When Using Promo Code FLYGREEN
Final Thoughts

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Frontier Airlines, the Denver-based low-cost carrier, has returned with one of its many appealing annual sales. In honor of Earth Week, the airline is offering significant savings on your next flight.

Here’s what you need to know to save big on your next Frontier flight!

For a limited time, Frontier Airlines is celebrating Earth Week with a sale that offers up to 50% off base fares for travel throughout the summer.

Until April 25, 2025, at 11:59 p.m. ET, passengers can use the discount code FLYGREEN to save 50% off base fares for travel on Tuesdays and Wednesdays through August 18, 2025.

The following blackout dates apply: May 27, 2025 and July 2, 2025.

To score these steep discounts, a round-trip purchase is required, and the fare must be purchased 7 days in advance.

With a travel window that extends until August 18, this sale could be a significant savings opportunity if you’re hoping to book a vacation during the warm summer months.

“In honor of Earth Week, we are thrilled to thank our customers for the steps they are taking to be green along with us by offering half-off base fares,” said Jeff Werkheiser, senior director of brand and customer engagement at Frontier Airlines.

Hot Tip:

Flying on Frontier Airlines soon? Make sure to check out our detailed guides on how to earn and redeem Frontier Miles!

Sample Fares

Use the promo code FLYGREEN when booking to secure the best deals available. We conducted several searches, including this flight from Denver (DEN) to Phoenix (PHX), leaving on a Tuesday and returning the following Tuesday. The total amounted to $87 for a round-trip, excluding any fees for bags or additional purchases.

Frontier Earth Week Sale — Image Credit: Frontier Airlines

If you want to visit Fort Lauderdale (FLL) for some much-needed beach time from Long Island (ISP), this sale allows you to fly for just $62.

Frontier Earth Week Promo Sale — Image Credit: Frontier Airline

When you calculate your Frontier airfare, keep in mind that certain services, such as checking baggage and seat selection, are not included in the base rate and will incur additional fees. Some of the cheapest fares are exclusively accessible to Discount Den members.

Final Thoughts

Frontier runs sales like this one rather frequently. If the routes and dates work for your trip plans, you can get 50% off the base fare for bookings made before April 25, 2025, at 11:59 p.m. You will still have to pay for items like seat assignments and carry-on luggage, but if you spot an offer you like, act quickly before it disappears.