What is the carry-on limit for Allegiant Air?

For Allegiant Air, carry-on bags must not exceed 22x16x9 in (56x40x22 cm). The weight must be under 25 lbs (11 kg). Fees range from $15 to $50 online, and up to $75 at the airport.

What is the personal item size for Allegiant Air?

The personal item size is restricted to a maximum of 16x15x7 in (40x38x17 cm) and must fit under the seat in front of you.

How much are the checked bag fees on Allegiant Air?

For domestic or standard Economy routes, Allegiant Air charges $35 for the 1st checked bag and $45 for the 2nd checked bag. Elite members or cardholders may qualify for waivers.

Allegiant Air Baggage Allowance & Fees 2026: Sizer limits & Calculator

Allegiant Air Sizer Limits Overview

Low-Cost Carrier

Personal Item

16 x 15 x 7 in

Must fit under-seat. Allegiant has a unique personal item size limitation: 16 x 15 x 7 inches.

Carry-On Bag

22 x 16 x 9 in

Max size 22 x 16 x 9 inches. Note the very low weight limit: only 25 lbs (11 kg). Carry-on fee applies.

Checked Bag

40 lbs (18 kg)

Standard checked bags must weigh under 40 lbs (18 kg) and measure under 62 linear inches.

Can I Bring It? Sizer Calculator

Length18 in

Width14 in

Height (Thickness)8 in

Bag Weight15 lbs

Compliance Results for Allegiant Air

Fail

Under-seat Personal Item

Too Large (Airline max is 16x15x7 in)

Alert

Overhead Cabin Carry-On

Size fits, but fee applies ($15-$75)

Pass

Checked Hold Bag

Complies with standard checked limits

Estimated Baggage Fee:$35

Detailed Luggage Guidelines

Here is the full breakdown of size sizer dimensions, weight caps, and carry-on/checked bag policies.

Luggage Type	Maximum Size (Inches)	Maximum Size (Metric)	Weight Cap	Standard Cost
Personal Item	16 x 15 x 7 in	40 x 38 x 17 cm	No strict limit	FREE (Fits under seat)
Carry-On Bag	22 x 16 x 9 in	56 x 40 x 22 cm	25 lbs (11 kg)	Fees range from $15 to $50 online, and up to $75 at the airport
1st Checked Bag	Max 62 linear inches	Max 157 linear cm	Max 40 lbs	$35 USD

Pro-Tip for Allegiant Air Travelers

Allegiant carry-on weight limit is only 25 lbs (11 kg), which is much lower than the 35 lbs of Spirit/Frontier. Gate agents can weigh carry-on bags at random on full flights.

Best bag selection: Choose an ultra-lightweight rolling tote bag to minimize the built-in weight of your luggage.

Baggage Penalty & Excess Fees

Exceeding either sizer dimensions or weight caps will result in extra charges at check-in or boarding gates.

Fee Category	Domestic US Rate	Details
1st Checked Bag Fee	$35	Fees typically run $35-$65 if purchased in advance, and $75 at the counter.
2nd Checked Bag Fee	$45	Standard rate for economy passengers.
Overweight Charge	$75	Applies if the bag exceeds standard weight caps (e.g. 50 lbs / 23 kg).
Oversized Charge	$75	Applies if the bag linear dimensions exceed 62 inches.

For more details or to pre-book excess luggage allowances online, visit the official Allegiant Air Baggage Page.

Frequently Asked Questions

What is the maximum baggage size sizer for Allegiant Air in 2026?+

Your carry-on bag must measure within 22x16x9 in (including wheels and handles) to fit into Allegiant Air's overhead bin sizers. Your personal item must fit within 16x15x7 in to go under the seat in front of you.

What happens if my cabin bag exceeds the Allegiant Air sizer?+

If your luggage exceeds sizer limits at the boarding gate, you will be charged a gate check fee. For Allegiant Air, this can range up to $75 and the bag will be checked into the hold.

How much does a checked bag cost on Allegiant Air?+

A standard 50 lbs (23 kg) checked bag on Allegiant Air costs $35 if checked in. Low-cost tickets may charge extra. Booking your bags online 24 hours prior to departure is always cheaper than purchasing at the airport counter.