Frontier Airlines BOGO: Friends Fly Free in September
Frontier Airlines is rolling out a buy one, get one free flight deal for late summer getaways. Discount Den members who book on August 18 or 19 can bring a companion for the cost of taxes and fees, with travel valid September 2 through September 30, 2025. The airline is also dangling a free one year Discount Den membership for non members who book during the same two day window. A 14 day advance purchase applies, seats are limited, and blackout dates apply.
Key Points
- Why it matters: Two day sale gives travelers a true buy one, get one free option.
- Travel impact: Valid September 2 to 30, taxes and fees from $10.10 still apply.
- What's next: Frontier hints at more weekly deals tied to its "new low fare airline" push.
- Booking deadline is 11:59 p.m. MDT on August 19, 2025.
- Offer requires parties of two or more on the same reservation.
- New bookings can include a free one year Discount Den membership.
Snapshot
For bookings made August 18 and 19, Discount Den members can add a second traveler at no base fare on select Frontier flights, paying only required taxes and fees that start at $10.10. Travel must occur between September 2 and September 30, 2025, and a 14 day advance purchase is required. The offer is limited, not available in all markets, and blackout dates apply. Non members who book during the two day window can also receive a free one year Discount Den membership, normally $99, making this a rare stackable savings opportunity. Popular leisure routes include Orlando International Airport (MCO), Harry Reid International Airport (LAS), Miami International Airport (MIA), and Los Angeles International Airport (LAX).
Background
Frontier has been using flash sales and membership perks to rebuild demand and sharpen its value pitch. Earlier this summer the carrier added 15 U.S. routes for October, expanding options from Denver and other hubs, which aligns with this push to fill seats in shoulder season travel. See our coverage in Frontier Airlines Adds 15 New Routes for Fall 2025. It also introduced a paid Disruption Assistance add on that allows easier reaccommodation during delays, part of a broader "New Frontier" refresh aimed at improving the experience without abandoning low base fares. Details here, Frontier Airlines Rolls Out 'Disruption Assistance' Flex Benefit. The Friends Fly Free sale drops right before Labor Day, when leisure demand softens, and targets two person trips where a second ticket at base fare is effectively free before taxes and fees. Seats remain limited, so flexibility helps.
Latest Developments
How the Frontier Airlines BOGO works, deadlines, and fine print
The Friends Fly Free promotion is available only to active Discount Den members who book by 11:59 p.m. MDT on August 19, 2025. It applies to itineraries with at least two passengers on the same reservation, for travel between September 2 and September 30, 2025. A 14 day advance purchase is required. The companion's base fare prices out at zero, and all travelers pay applicable taxes and fees that start at $10.10. Frontier notes that availability is limited, the fare will not appear in all markets, and blackout dates apply. During the same two day period, non members who book a flight can secure a free one year Discount Den membership, typically $99 for the first year, unlocking member only fares and ongoing promotions. Frontier says this is the first in a series of offers tied to its "new low fare airline" campaign.
Analysis
This sale blends urgency, perceived value, and targeted timing to stimulate September load factors, a classic ultra low cost carrier tactic. Pricing the companion's base fare at zero turns a standard percentage discount into a shareable benefit, which tends to convert fence sitters who are planning a two person trip. Requiring a 14 day advance purchase and limiting inventory keeps revenue control intact, while taxes and fees from $10.10 maintain regulatory transparency. The two day book window creates scarcity that fits Frontier's recent cadence of short, simple promos.
The free first year Discount Den membership is the sleeper value. The club unlocks lower fares year round and pairs with other member perks, so enrolling travelers during a headline grabbing BOGO grows a pool of repeat customers who will receive future targeted offers. It also dovetails with Frontier's broader "New Frontier" upgrades, including optional disruption tools and upcoming premium seating enhancements, which give the airline more levers to upsell without raising base fares across the board.
Travelers should still compare total trip costs. Frontier's unbundled model prices seat selection, carry on and checked bags, and priority services separately, which can erase savings if you buy many extras. That said, a two person round trip to leisure markets such as Orlando, Las Vegas, Miami, or Los Angeles can pencil out well if you pack efficiently, accept standard seats, and can fly on valid dates. For September getaways, this is one of the stronger simple value plays on the market.
Final Thoughts
If you can lock plans by August 19 and travel in September, this deal is straightforward and rich in value. Book two or more people on the same reservation, pay taxes and fees, and your companion's base fare is free. Layer in a complimentary year of Discount Den when you book during the window, and future member only fares become accessible through 2026. Check blackout dates, verify that your route participates, and compare the cost of bags and seats before purchasing. For late summer trips, it is an easy win for budget minded travelers eyeing a Frontier Airlines BOGO.