Frontier Airlines online check-in
Flying with Frontier Airlines? 1Checkin checks you in on Frontier Airlines flights (IATA code F9) as soon as online check-in opens and emails you the boarding pass, so you don't have to watch the clock.
We have been checking passengers in on Frontier Airlines since 2019: more than 80 completed check-ins so far.
When does Frontier Airlines check-in open?
Online check-in for Frontier Airlines opens 24 hours before departure and closes 90 minutes before departure.
Seat selection on Frontier Airlines
Frontier Airlines lets you choose a seat for free at online check-in. 1Checkin picks a seat that matches your saved preference (window, aisle, front of the cabin).
1Checkin has checked passengers in on Frontier Airlines flights departing from Atlanta (ATL), Denver (DEN), Dallas-Fort Worth (DFW), New York (JFK), Las Vegas (LAS), Los Angeles (LAX), Orlando (MCO) and Miami (MIA), plus 1 more airports.
Frontier Airlines check-in FAQ
How does automatic check-in for Frontier Airlines work?
Forward your Frontier Airlines booking confirmation to 1Checkin or add the booking in the app. We check you in as soon as online check-in opens and send the boarding pass to your e-mail.
When does Frontier Airlines online check-in open?
Online check-in for Frontier Airlines opens 24 hours before departure and closes 90 minutes before departure.
Can I choose my seat on Frontier Airlines?
Frontier Airlines lets you choose a seat for free at online check-in. 1Checkin picks a seat that matches your saved preference (window, aisle, front of the cabin).
How it works
- Forward your booking confirmation to 1Checkin, or add the booking reference in the app.
- 1Checkin checks you in on Frontier Airlines the second online check-in opens.
- Your boarding pass lands in the app, ready for the airport, even offline.