The check-in period begins 24 hours before departure and ends 45 minutes before the planned departure time. You can either Allegiant Airlines check in...
The check-in period begins 24 hours before departure and ends 45 minutes before the planned departure time. You can either Allegiant Airlines check in online and print your paper boarding passes to bring to the airport, or you can retrieve your boarding pass(es) digitally via the Allegiant mobile app (preferred)