Frontier Promo Codes in September 2026

During Frontier's fare sales, Discount Den members consistently save about $10 per one-way ticket over the public price. In 2026, Frontier's spring sale started member fares at $19 versus $29 for non-members, and its St. Patrick's Day sale started at $24 for members versus $34 for everyone else. At $10 saved per one-way, a $59.99 renewal covers itself after six one-way flights. A first-year membership at $109.99 needs about eleven.

Kids Fly Free is the single biggest perk for families. On valid flights, one kid under 15 can fly free for every adult Discount Den fare purchased. On a $94 one-way fare, one free child ticket saves you $94 each way, roughly $188 on a round trip, which wipes out the full first-year fee and then some. To use this perk, you have to select a flight on a date that is marked with a “Kids Fly Free” logo beneath the Discount Den price.

Discount Den fares are available for you and up to 8 additional people on your reservation. A group of nine locks in member pricing off one $59.99 fee instead of nine people paying public rates.

Discount Den members also get exclusive discounts on Frontier’s other membership programs. For instance, in the summer of 2026, they were promoting $200 off GoWild! Annual Passes and $50 off GoWild! Summer Passes for members.

A GoWild! Pass allows you to pay only $0.01 plus taxes and fees (around $15 for domestic flights) on unlimited flights to over 100 destinations. After purchasing, all you have to do is log in to your Frontier Miles account, search for flights, and check for the GoWild! fare option. The pass auto-renews unless you cancel.

Frontier sells multiple versions of this pass, and these were the prices we saw in 2026:

• The Annual Pass was $699 in 2026.

• The Summer Pass, which went live in April 2026, cost $249 and was valid for summer travel through the end of September 2026.

• The Fall & Winter Pass, which went live in September 2026 for $249, covers travel from August 2026 through the end of February 2027.

• The Monthly Pass costs $149 per month, but for the first month you’re only charged a $119 enrollment fee at signup.

Frontier discounts these passes during promotional windows, so the price you pay can land well under the standard rate. Past promotions have dropped the Annual Pass to $399 and the seasonal passes down to $199.

GoWild! fares aren't available for many periods throughout the year, including some of the year's most popular travel days. Also, domestic flights can only be booked the day before departure, and international flights open up 10 days out. Finally, seats for passholders are limited and go fast.

Let’s say, for example, you’d otherwise buy a $50 one-way fare (your real fare options will vary by route, date, and time). On a GoWild! flight, you still pay about $15 in taxes and fees, so you’re saving $35 on that flight with the pass.

We’re going to divide the pass price by that per-flight saving example to illustrate how many flights it takes to break even:

• At the $699 Annual Pass price, $699 divided by $35 works out to about 20 one-way flights, or roughly 10 round trips, before the pass earns its cost back.

• The seasonal passes at $249 break even at about seven one-way flights across the season, or about four round trips.

• The Monthly Pass waives your first month but still charges the $119 enrollment fee, so you need about four flights in those first 30 days to justify that startup cost. After that, at $149 per month, it takes about five flights a month to stay ahead.

Keep in mind these numbers shift with the fares you'd actually pay. For flights that cost more than our $50 example, you save more per flight and break even faster. Fares that are less than $50 require more flights to catch up.

Someone flying two or three quick trips a year comes out behind, since the fares they'd buy anyway cost less than the pass. Someone flying twice a month on Frontier routes clears the break-even point for an Annual Pass. Don’t buy the pass if your travel isn’t that frequent or it’s locked to fixed dates and holidays. It works best for flexible travelers who fly often and don't mind traveling last minute.

And keep in mind that Frontier's cheapest standard fares can start as low as $19 without any membership at all, so if you only fly once in a while, booking those flights directly beats the cost of a pass.