Frontier Airlines has unveiled an irresistible promotion that makes traveling with a companion far more affordable. The airline now allows Discount Den members to book flights in September 2025 and take a friend for free. Customers still cover taxes and fees, but the savings remain impressive. In addition, travelers will enjoy 50% off the base fare, creating one of the airline’s strongest offers of the year.

The deal runs from September 2 through September 30, 2025, and requires booking by August 19, 2025. Customers must purchase reservations through FlyFrontier.com or the official mobile app. Each booking must include at least two passengers. Although blackout dates apply, many routes remain available for travelers who plan ahead.

Frontier Airlines also adds value by offering a free one-year Discount Den membership to new customers who join before August 19, 2025. The membership usually costs $99 annually. It provides access to exclusive low fares and regular promotional deals throughout the year. Members can save on multiple trips, which makes the program attractive for frequent flyers.

Beyond this promotion, Frontier Airlines continues to invest in passenger experience. The airline recently introduced UpFront Plus seating with extra space and guaranteed empty middle seats. Later in 2025, the airline will launch its first-ever First Class option, combining affordable fares with premium comfort. These updates form part of the carrier’s wider “New Frontier” campaign to improve travel quality while staying cost-effective.

Travelers also benefit from the revamped FRONTIER Miles program. It rewards purchases with generous mile accrual rates and allows families to pool rewards for faster redemption. Achieving elite status requires fewer miles compared to many competitors, giving passengers valuable perks like priority boarding and free checked bags.

This “Friends Fly Free” promotion gives travelers more reasons to book with Frontier Airlines in September. Customers who act quickly can combine free flights, discounted fares, and a free annual membership. With upgraded seating and rewards, the airline makes affordable travel easier than ever.

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