What size bag can I carry-on Allegiant for free?

Flying Allegiant Air? Knowing the Allegiant carry on size rules can save you money and stress. Allegiant’s ultra-low-cost model means every inch of your bag matters—especially if you want to avoid surprise fees.

What’s Free: Personal Item Dimensions

Every passenger gets one free personal item. This must fit under the seat in front of you.

Allowed Size

• Max dimensions: 8 x 14 x 18 inches (20 x 35 x 45 cm)

• Examples: purse, laptop bag, small backpack

• Must fit completely under the seat

Oversized personal items may be charged up to $75, so measure carefully.

Carry-On Bag: Overhead Bin Rules

Unlike the personal item, carry-on bags cost extra. They must fit in the overhead bin and meet strict size limits.

Carry-On Size Limit

• Max dimensions: 10 x 16 x 22 inches (25 x 40 x 55 cm)

• Examples: roll-aboard suitcase, garment bag

• Fees range from $10 to $75 depending on route and timing

Buying your carry-on allowance during booking is usually cheapest.

Checked Bags: Optional Add-Ons

Allegiant allows up to four checked bags per passenger, each up to 50 lbs and 80 linear inches. These are not included in base fares and must be purchased separately.

Pro Tips to Avoid Fees

• Measure your bag including wheels and handles

• Buy baggage early—airport fees are highest

• Use bundles if you need multiple bags

• Stick to the free personal item for short trips

Why It Matters

Allegiant’s baggage policy is designed to keep fares low—but it’s easy to overspend if you don’t plan ahead. Understanding the Allegiant carry on size rules helps you pack smarter and fly cheaper.

Whether you're heading out for a weekend getaway or a longer vacation, knowing what you can bring for free ensures a smooth boarding experience and keeps your travel budget intact.