What Time Does Allegiant Check-In Open and Close?

Author : Tripz adviser | Published On : 06 Nov 2026

Planning a trip on Allegiant Air and wondering when to check in? Allegiant’s timing rules are simple, but missing them can cost you your seat on the plane. The following is a quote from Allegiant Airlines’ very own website.

Quick answer: The Allegiant check-in window opens 24 hours before departure and closes 45 minutes before your scheduled flight time. That is the Allegiant check-in time to remember. 

Allegiant Check-In Times at a Glance

How Allegiant Check-In Works

You don’t need to confirm your reservation ahead of time. Allegiant says there is no need to confirm your reservation before departure. Once the window for the 24 hour period is open, one will be able to check in either online, via the app or at the airport. An additional reminder email is sent by Allegiant one day prior to the scheduled flight. On check-in, a free seat is allocated for you. One catch: once you’ve downloaded or printed a boarding pass, or checked in at the airport, your seat assignment can’t be changed. Check your seats and bag reservations before you hit “print.” 

Allegiant Check-In Time at the Airport

You should arrive 2 hours ahead of departure. Some airports have an earlier cut off time of 45 minutes ahead of departure. This is due to crew checking people in at the gate. The plane will also need to be prepared.

We recommend you check in, go through security checks and arrive at your boarding gate 1 hour ahead of departure. 45 minutes is the final time we would recommend.

Counter hours and staffing vary from one airport to the next. Times are always local to your departure airport, so check your departure airport’s page on Allegiant’s site before you leave, especially for early-morning flights.

Pros and Cons of Allegiant’s Check-In Setup

Pros

• A full 24-hour window gives you plenty of flexibility.

• Online and mobile check-in are free.

• Seats are assigned automatically at the time of check-in.

• It provides a digital boarding pass to the user.

• You can fix bag reservations and seats before you finalize anything.

Cons

• Late attendees have to face the consequence of not being allowed on board.

• Seats can’t be changed once your boarding pass is printed or downloaded.

• Some passengers must check in at the airport counter instead of online.

• Needing an agent to print your pass may cost extra.

• Counter hours differ by airport, so you can’t assume they match your last trip.

Practical Tips

1. The alarm should be set 24h in advance of departure to allow you to check in as soon as the doors open. 

2. Also take a photo of your boarding pass through the app in case there is no network at the airport.

3. Carry a government issued identification. Allegiant reminds travelers to have it with them.

4. Pay for your carry-on in advance. If you already have your boarding pass, have paid for your carry-on reservation, and have no checked bags, you can go straight to TSA security. 

5. Arrive early even if you’ve checked in online. Security lines don’t care about your boarding pass.

FAQs About Allegiant Check-In Time

What time does Allegiant check-in open?

Allegiant’s check-in counter will be open 24 hours before your departure time.

What time does Allegiant check-in close?

Check-in at Allegiant closes 45 minutes prior to takeoff. At that time, you won’t be able to board the aircraft, or collect your boarding pass.

How early should I arrive for an Allegiant flight?

 Allegiant requires passengers to reach their flight terminal two hours before departure time and be at the gate at least one hour before departure time.

Is the Allegiant check-in time the same for every airport?

The 24-hour and 45-minute windows are the standard. Ticket counter hours and some cutoff details can vary by airport, so verify yours on Allegiant’s website.

Can I check in for my Allegiant flight at the airport?

Yes. You can use the airport counter, and some passengers are required to. Online and app check-in are the easier routes.

Does Allegiant charge for check-in?

Online and mobile check-in don’t carry a separate fee. It is possible that having your boarding pass printed by an agent at the airport will be an additional fee.

Can I change my seat after Allegiant check-in?

Only if you haven’t printed or downloaded your boarding pass. After that, the seat is locked in.

Final Thought

The Allegiant check-in time boils down to these figures: 24 hours before the scheduled departure time when it opens and 45 minutes prior when it closes. Go ahead and check in right away once the check-in window is open, ensure that you have everything from the seating arrangements to baggage check-ins, store your boarding pass on your phone, and show up at the airport with time to boot.