Frontier Airlines' app is broken in the worst possible way — check-in fails for nearly half of users, the app crashes during booking, and forces travelers back to the website for basic tasks. These airline apps offer reliable check-in, smooth booking, and dramatically less travel stress.
Each app below addresses a specific gap in Frontier Airlines's offering. We picked them based on real user review patterns and feature differentiation.
Spirit Airlines (4.82 with 2 million ratings) operates in the same ultra-low-cost lane as Frontier but the app is dramatically more reliable. Check-in works, bookings load, and the entire booking flow is more polished. For most US routes, Spirit is the closest direct alternative to Frontier on price and the app is better.
Explore Spirit Airlines data →Southwest is the highest-rated major US airline app and offers the best customer experience in domestic travel. Two free checked bags, no change fees, and a check-in flow that actually works. Pricing is competitive with Frontier on many routes when you factor in baggage fees.
Explore Southwest Airlines data →Fly Delta (4.85 with 7 million ratings) is widely considered the best airline app in North America. Booking, check-in, baggage tracking, and gate updates all work flawlessly. The price is higher than Frontier but the experience is incomparably better and the app reliability removes a major source of travel stress.
Explore Delta Air Lines data →United's app has improved significantly in recent years and is one of the most reliable major airline apps in the US. Check-in, mobile boarding passes, and live flight tracking all work consistently. A solid step up from Frontier in both service and app quality.
Explore United Airlines data →American Airlines has one of the most stable airline apps and the broadest US route network. The check-in flow and seat selection are reliable, the loyalty program (AAdvantage) is well-rated, and the app handles baggage tracking and gate changes far better than Frontier.
Explore American Airlines data →If you're using Frontier specifically because it's cheap, Hopper is the better tool for finding low fares across all airlines. The price prediction tells you when to book, and you can compare Frontier prices against Spirit, Southwest, and other low-cost carriers in one place.
Explore Hopper data →We found these alternatives by analyzing review patterns across airline apps. The most common reasons users abandon the Frontier app are broken check-in, app crashes during booking, login failures, and confusing UI. Each alternative below addresses at least one of those friction points.
Spirit Airlines is the most direct alternative — same ultra-low-cost model, much more reliable app. Southwest is the better choice if you can pay slightly more for free baggage and a smoother experience.
The Frontier app has well-documented stability problems — 32% of reviews specifically mention crashes during booking or check-in. The booking flow forces users to the website for tasks the app should handle. Most major US airline apps don't have these issues.
Yes — you can check in via Frontier's website (which is more reliable than the app) or at a kiosk at the airport. Many Frontier travelers skip the app entirely after experiencing repeated check-in failures.
App Vulture uses AI-powered review intelligence to analyze what real users say about apps — their pain points, feature requests, and reasons for switching. We identified these alternatives by analyzing review patterns across travel and airline apps and validated each candidate against the source app's most common churn reasons.
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