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Frontier Airlines Online Check-In (2026)

Last updated: April 2026 · Source: Frontier Airlines official website

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Quick Answer

Frontier Airlines online check-in opens 24 hours before departure and closes 60 minutes before both domestic and international flights. Check in via flyfrontier.com or the Frontier app to avoid the $25 printed boarding pass fee at the airport.

Check-In Window

Opens
24 hours before departure
Closes
60 minutes before domestic and international flights

How to Check In Online — Step by Step

  1. 1Visit flyfrontier.com or open the Frontier mobile app.
  2. 2Enter your Last Name and 6-character Confirmation Code.
  3. 3Select passengers to check in.
  4. 4Choose or upgrade your seat assignment.
  5. 5Add any bags or extras.
  6. 6Download or print your boarding pass.
Go to Frontier Airlines Check-In →

Check-In Methods

Online (Website)https://www.flyfrontier.com/travel/my-trips/check-in/?mobile=true
Mobile App✓ Frontier Airlines app (iOS, Android)
Mobile Boarding Pass✓ Accepted
Airport Kiosk✓ Available at most airports

Documents Required

Valid government-issued photo ID for domestic flights. Passport providing proof of citizenship and identity for international flights. Visa if required by destination country.

Seat Selection at Check-In

Seat selection is available for a fee during check-in. Elite status members get free upgrades (Diamond at check-in, Platinum 12 hours before, Gold 4 hours before). If no seat is selected, one is randomly assigned for free.

International Flight Check-In

Passport required for international flights. Baggage must be checked in at least one hour prior to departure. Entry requirements are based on country of citizenship.

Group & Family Check-In

Frontier guarantees adjacent seats for children 13 or younger and an accompanying adult at no additional cost, provided they are on the same reservation and seats are available at booking.

Troubleshooting Common Issues

  1. 1'Website or app error' - Clear cache, restart browser, or try the mobile app instead of the website.
  2. 2'Can't find confirmation code' - Check your email for the 6-character alphanumeric code.
  3. 3'Missed check-in cutoff' - If you fail to check in 60 minutes prior, your ticket will be deemed a No-Show Cancellation.

Pro Tips

Frontier charges $25 per passenger to print a boarding pass at the airport, so mobile check-in is highly recommended. If you don't check in 60 minutes before departure, your entire itinerary (including return flights) will be cancelled as a No-Show.

Frequently Asked Questions

Can I still get a printed boarding pass?▼
Yes, but it costs $25 per passenger, per direction at the Airport Agent Assistance counter.
What if I don't select a seat?▼
You will be randomly assigned a seat from the remaining selection for free, but your party may be separated.
How early should I arrive at the airport?▼
Frontier recommends arriving at least 2 hours early for domestic flights and 2-3 hours early for international flights.

More Frontier Airlines Information

🧳
Baggage Policy
Fees, limits & rules
🐾
Pet Policy
Cabin & cargo rules
📊
Compare All Airlines
Check-in timing comparison

Related Airlines — Online Check-In

American Airlines
Opens: 24 hours before departure
Delta Air Lines
Opens: 24 hours before departure
United Airlines
Opens: 24 hours before departure
Southwest Airlines
Opens: 24 hours before scheduled departure
JetBlue Airways
Opens: 24 hours before departure
Alaska Airlines
Opens: 24 hours before departure

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