United States · F9 / FFT
Frontier Airlines Online Check-in Guide
Denver-based ultra-low-cost airline, animal-themed liveries. Online check-in opens 24 hours before on flyfrontier.com or in the Frontier app.
Opens on flyfrontier.com in a new tab.
Is Frontier Airlines check-in open right now?
Pick your departure time — we'll show you whether the check-in window is open, when it opens, or whether it's already closed. Your input never leaves the page.
When does Frontier Airlines check-in open and close?
How to check in online with Frontier Airlines
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Have your booking reference and ID ready
You'll need a 6-character booking reference (PNR) and a valid travel document (passport or EU/EEA national ID).
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Open the official check-in page
Use the button at the top of this page or visit flyfrontier.com directly. Avoid third-party "check-in" sites.
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Enter passenger details
Add passport / ID number, expiry date, and country of issue if travelling internationally. This step is mandatory and blocks check-in if skipped.
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Choose seats and add extras
Random seats are free in the 24-hour window; named seats and priority boarding cost extra. Skip if you don't need them.
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Save the boarding pass
Add to Apple Wallet or Google Wallet. The Frontier Airlines app stores it offline once downloaded.
Mobile vs desktop check-in
| Feature | Mobile (app) | Desktop (web) |
|---|---|---|
| Boarding pass in Wallet | Yes (recommended) | Email link only |
| Passport scan | Yes (camera) | Manual entry |
| Push gate updates | Yes | No |
| Print boarding pass | Via email link | Yes |
| Best for | Day-of-travel use | Troubleshooting, family bookings |
Frontier Airlines baggage at a glance
| Type | Dimensions | Weight | Included? |
|---|---|---|---|
| Personal item | 45×35×20 cm | 16 kg | Yes |
| Carry-on | 61×46×25 cm | 16 kg | No |
| Checked | — | 22 kg | From €30 |
Common Frontier Airlines check-in problems
Carry-on fees are unbundled
Problem: Frontier charges $35–55 for carry-on online, more at gate. Personal item only is included in base fare.
Solution: Pre-pay carry-on at booking. Or pack personal item only (45×35×20 cm under-seat). Frontier 'GoWild!' annual pass includes some bag perks.
GoWild! Pass restrictions
Problem: Frontier's GoWild! all-you-can-fly pass ($299–599/year) excludes: weekends in summer, Thanksgiving/Christmas weeks, all bag fees, $0.01 booking fee per leg.
Solution: Check blackout dates carefully on the GoWild! Pass FAQ. Best for flexible travelers willing to fly Tuesday-Wednesday.
Frontier Airlines check-in FAQ
When does Frontier check-in open?
24 hours before scheduled departure. Closes 60 minutes before for all flights.
Is Frontier safe?
Yes — Frontier is a fully certified Part 121 air carrier under FAA rules. Modern Airbus A320/A321 fleet, average aircraft age <8 years.
What is Frontier Miles?
Frontier's frequent flyer program. Earn 1 mile per dollar (excluding taxes). 10,000 miles = ~one one-way ticket on Frontier. Status tiers (Elite 20K/50K/100K) for upgrades + free bags.
