Flying Allegiant Air? Knowing the Allegiantcarry 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.

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