Frontier Airlines
Overview
The Frontier Airlines app is a critical component of the "Ultra-Low-Cost Carrier" (ULCC) ecosystem, where digital self-service is mandatory for maintaining low fares.
The Frontier app is designed around the "Discount Den" travel club and the unique "Kids Fly Free" promotion. Technically, it functions as a travel hub, handling everything from initial booking to adding bags or upgrading seats.
By requiring users to check-in and access their mobile boarding pass within the app, Frontier reduces its airport staffing needs. The app also incorporates a "Kids Fly Free" booking flow, which is restricted exclusively to the digital platform. However, the app's rigid cancellation and refund policies—reflecting the airline's "all sales are final" philosophy—can lead to poor user experiences if travel plans change.
Pros & Cons
Exclusive Deals Access: The app is the only place to book "Kids Fly Free" fares effectively.
Cost Savings via Self-Service: Avoids the "agent assistance" fees Frontier charges for airport check-in.
Real-Time Flight Alerts: Provides push notifications for gate changes and boarding times.
Luggage Management: Allows users to pre-pay for bags at a lower rate than at the airport.
Comprehensive Family Support: Clearly outlines rules for strollers and car seats, which are checked for free.
Mobile Boarding Integration: Boarding passes can be saved to Google Wallet for quick offline access.
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Restrictive Refund Policies: Most fares are non-refundable, and navigating the change-fee structure can be difficult.
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Heavy Up-Selling: Promotes credit cards and travel insurance during every step of the booking process.
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Performance During Peak Times: Users report occasional slowdowns during the 24-hour check-in window.
Download
Get it on Google Play 
Get it on App Store FAQs
How do I use "Kids Fly Free"?
You must be a Discount Den member and book select domestic round-trips via the app.
Do I have to pay for a stroller?
No, strollers and car seats can be checked for free and don't count as luggage.
Is the mobile boarding pass enough for security?
Yes, it is accepted at all domestic airports; keep a screenshot as a backup.
Can I add a pet through the app?
Yes, this can be done in the "Manage Trip" section for a one-way fee.
How do I get a refund?
Refunds are only allowed if requested within 24 hours of booking for flights over 7 days away.
Hot Reviews
Frequent flyers emphasize that if you follow the digital rules, you can travel for significantly less than traditional carriers.
Some users find the booking flow to be a "gauntlet" of extra charges, with the app asking for bag fees multiple times.
Many praise the alert system, noting they received gate change info on their phone before it was announced in the terminal.