Allegiant Air online check-in
With 1Checkin you forward your Allegiant Air (G4) booking once and we check you in automatically the moment online check-in opens, then send you the boarding pass.
When does Allegiant Air check-in open?
Online check-in for Allegiant Air opens 24 hours before departure and closes 60 minutes before departure.
Seat selection on Allegiant Air
Choosing a seat on Allegiant Air is a paid extra. If you don't buy one, the airline assigns a seat at check-in.
Allegiant Air check-in FAQ
How does automatic check-in for Allegiant Air work?
Forward your Allegiant Air 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 Allegiant Air online check-in open?
Online check-in for Allegiant Air opens 24 hours before departure and closes 60 minutes before departure.
Can I choose my seat on Allegiant Air?
Choosing a seat on Allegiant Air is a paid extra. If you don't buy one, the airline assigns a seat at check-in.
How it works
- Forward your booking confirmation to 1Checkin, or add the booking reference in the app.
- 1Checkin checks you in on Allegiant Air the second online check-in opens.
- Your boarding pass lands in the app, ready for the airport, even offline.