Allegiant Air online check-in: when it opens and closes
Allegiant Air online check-in opens 24 hours before departure and closes 45 minutes before departure.
- Online check-in opens
- 24 hours before departure
- Online check-in closes
- 45 minutes before departure
- Where to check in
- Allegiant Air website or mobile app
- Last verified
Open Allegiant Air online check-in (allegiantair.com)
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When does Allegiant Air online check-in open?
Allegiant Air online check-in opens 24 hours before the scheduled departure time.
When does Allegiant Air online check-in close?
Allegiant Air online check-in closes 45 minutes before the scheduled departure time.
Online and mobile app check-in is available from 24 hours until 45 minutes before departure.
What Allegiant Air says
These times come from pages published by Allegiant Air, last checked on November 5, 2026. Airlines change their rules, so confirm on the airline's page before you travel.
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Check in online anytime from 24 hours up until 45 minutes prior to departure.
Source: allegiantair.com
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Check in (whether online, mobile, or at the airport) closes 45 minutes prior to departure
Source: allegiantair.com
See the check-in time for your own flight
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