The Frontier Airlines app has recently been unstable, with a critical update released just 2 days ago to fix major crashes. There is also a high chance that standard “geo-blocking” is preventing the app from loading data correctly.
Here is the step-by-step fix, ordered from easiest to most effective.
1. The Critical Update (Do this first)
Frontier released Version 3.4.2 around December 12th specifically to fix “major crashes and check-in errors.”
Action: Go to your App Store (iOS) or Play Store (Android) and verify you are on version 3.4.2 or higher. If you see an “Update” button, hit it immediately.
2. The Immediate Workaround (If you need to check in NOW)
The app is notoriously buggy. Do not rely on it if you are in a rush.
Use the Mobile Website: Open Chrome or Safari on your phone and go to
flyfrontier.com.Important: If the website lets you check in, take a screenshot of your boarding pass immediately. Do not trust the app to load it again when you are at the airport gate.
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3. The “Deep Clean” Reinstall
If the app opens but crashes instantly (the “splash screen” crash), standard reinstalling won’t fix it because the corrupted data remains in your phone’s cache.
Delete the Frontier App.
Restart your phone (This is critical—it clears the RAM/Cache).
Redownload the app.
Summary:
The app is currently fragile. Update to v3.4.2 first. If that fails, abandon the app and use the website (flyfrontier.com) to avoid further frustration.
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