How to Complete Your Web Check-In With Allegiant Air

Flying with Allegiant? Here’s a comprehensive guide to Allegiant Air check in, including Allegiant Air check in online, Allegiant flight check in, Allegiant Air check in bag and Allegiant Air check in bag size. By following these steps you’ll ensure a smooth experience before departing, whether you’re using the web check-in or preparing your bags.

1. Overview: Why Web Check-In Matters

Web check-in is a convenient way to save time at the airport, select your seat (if included), add baggage, and obtain your boarding pass ahead of your departure. With Allegiant, you can avoid long lines by completing the process online.

Platforms for Allegiant Airlines online Web Check-in:

2. When Can You Perform Web Check-In?

• The official site states you may check in starting 24 hours before your scheduled flight departure via the “Check In” page of AllegiantAir.com.
• Some sources say online check-in closes 45 minutes before departure.
• Other guidance suggests you should arrive at the airport at least 2 hours before departure, because at some airports check-in or bag drop may close earlier.

Summary Table: Check-in Timing

3. How to Complete the AllegiantAir.com Check In (Web)

Follow these steps for your Allegiant online check in:

1. Visit the official site: AllegiantAir.com → Check-In
2. Enter your reservation information (confirmation code/last name etc).
3. Select any optional services: seat assignments (if not already selected), paid carry-on or checked bags, etc.
4. Choose your boarding pass delivery method: print at home, mobile pass, or have printed at airport (often for a fee).
5. Complete check-in and either download/print your boarding pass or ensure it is loaded to your mobile device.
6. If you have checked bags, you must still drop them at the airport baggage check or ticket counter by the stated cut-off time.

Key Points & Tips

• Web check-in is strongly recommended: it avoids extra airport fees and lines.
• Use the mobile app or download the boarding pass to your phone if possible.
• If you skip online check-in, you may incur a fee for a printed boarding pass at the airport (for example $5 in some cases) for Allegiant.
• Make sure all information—IDs, flight details—are correct when checking in.

4. Baggage & Bag Size Guidelines for Allegiant Air

When you perform Allegiant Air check in bag / Allegiant Air check in bag size, you should be aware of the baggage policy to avoid surprises.

Personal Item (Free)

• One free “personal item” allowed per passenger (e.g., purse, laptop bag, small backpack) at no charge.
• Maximum dimensions: 8 in × 14 in × 18 in (approx. 20 cm × 35 cm × 45 cm) for the personal item.

Carry-On Bag (Paid)

• If you bring a carry-on bag (to stow in overhead bin) you must pay the appropriate fee.
• Maximum size for carry-on: 10 in × 16 in × 22 in (25 cm × 40 cm × 55 cm) including wheels/handles/pockets.

Checked Bag (Paid)

• Maximum size: 80 linear inches (i.e., 203 cm combined length + width + height).
• Maximum weight: 50 lbs (~22 kg) for each checked bag.
• You may pre-purchase up to 4 checked bags per passenger in many cases.

5. Summary & Best Practices for Your AllegiantAir Web Check-In

• Start your Allegiant Air check in online as soon as the window opens (24 hours prior).
• Add any carry-on or checked baggage, choose seats and lock in the best options.
• Ensure your boarding pass is downloaded/printed; avoid paying extra airport fees.
• Measure your bags before travel to ensure they meet Allegiant Air check in bag size limits.
• Arrive at the airport with enough time (2 hours or more) especially if you have baggage to drop.
• Double-check your flight time, gate, and any updates via the site or mobile app.