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Allegiant Personal Item & Carry-On Size

Personal item and carry-on limits for Allegiant, in inches and centimeters, with a checker to test your own bag.

Last verified Source: Allegiant baggage page

The short answer

Your personal item can be up to 18 × 14 × 8 in (45 × 35 × 20 cm) and must fit under the seat in front of you.

Allegiant’s carry-on limit is 22 × 16 × 10 in (55 × 40 × 25 cm), including wheels and handles. A carry-on is not included in the base fare: $10–$75 per segment, by route.

Allegiant base fare: The base fare includes only a personal item. A carry-on costs $10–$75 per segment when added online, and $50–$75 if found at the airport.

Allegiant size limits

Drawn to scale. All measurements include wheels, handles and pockets.

Personal item

Under the seat in front
Allegiant personal item size limit: 18 × 14 × 8 in (46 × 36 × 20 cm)
Maximum size
18 × 14 × 8 in45 × 35 × 20 cm
Weight
No published limit
Cost
Free on every fare

Carry-on bag

Overhead bin
Allegiant carry-on bag size limit: 22 × 16 × 10 in (56 × 41 × 25 cm)
Maximum size
22 × 16 × 10 in55 × 40 × 25 cm
Weight
No published limit
Cost
$10–$75 per segment, by route

Will your bag fit Allegiant?

Bag type
Your bag’s outside size, wheels and handles included
Measure your bag at its widest points. Most carry-on bags are 21–22.5 in tall with wheels.

Allegiant base fare

The base fare includes only a personal item. A carry-on costs $10–$75 per segment when added online, and $50–$75 if found at the airport.

Rules to know

  • All measurements include wheels, pockets, handles and decorations, and bags may be measured before boarding.
  • Gate-checking costs $0–$75 depending on the reason (oversize vs full bins or strollers).
  • Allegiant completed its acquisition of Sun Country in May 2026; the two still operate and sell separately.
  • Up to four bags can be prepaid online.

Checking a bag too? See Allegiant Baggage Policy & Fees.

Bags that fit Allegiant

Allegiant compared with similar airlines

Allegiant carry-on size compared
AirlineCarry-onPersonal itemCarry-on weight
Allegiant22 × 16 × 10 inPaid55 × 40 × 25 cm18 × 14 × 8 in45 × 35 × 20 cmNo limit
Frontier24 × 16 × 10 inPaid61 × 41 × 25 cm18 × 14 × 8 in46 × 36 × 20 cm35 lb16 kg
Sun Country24 × 16 × 11 inPaid61 × 41 × 28 cm17 × 13 × 9 in43 × 33 × 23 cm35 lb16 kg
Breeze Airways22 × 14 × 9 inPaid56 × 36 × 23 cm17 × 13 × 8 in43 × 33 × 20 cm35 lb16 kg

Every airline in one chart: Personal Item Size by Airline (Master Chart).

Frequently asked questions

What is the Allegiant carry-on size limit?
22 × 16 × 10 in (55 × 40 × 25 cm) including wheels and handles. Allegiant has no published carry-on weight limit for most routes; you must be able to lift it into the bin.
What size personal item is allowed on Allegiant?
Up to 18 × 14 × 8 in (45 × 35 × 20 cm). It must fit under the seat in front of you.
Is a carry-on free on Allegiant?
No. $10–$75 per segment, by route The personal item is free.
Is a backpack a personal item on Allegiant?
Yes, if it fits within 18 × 14 × 8 in. A large travel backpack may count as your carry-on instead. More on backpacks.

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