Allegiant Air Baggage Fees: Quick Facts (2026)

Key Detail	What to Know
Free baggage	1 personal item
Carry-on bags	Paid on all fares
Checked bags	Paid add-on
Checked bag weight limit	50 lbs (22.7 kg)
Cheapest time to buy baggage	During booking
Most expensive time to buy baggage	At the airport gate

What Does Allegiant Air Include for Free?

Only one personal item is free on Allegiant Air. That is the only baggage included in the base fare.

Your personal item must:

• Fit completely under the seat in front of you
• Stay within 18 × 14 × 8 inches 
• Remain under the seat for the entire flight

Common personal items that qualify include a small backpack, handbag, laptop bag, or compact tote. If your item does not fit under the seat, Allegiant staff may charge you the carry-on fee at the gate, which is the highest rate available.

Allegiant may verify personal item dimensions during the boarding process to ensure compliance with baggage rules. 

Allegiant Baggage Fees at a Glance

Bag Type	Free?	Size Limit	Weight Limit
Personal Item	Yes	18 × 14 × 8   inches	Must fit under seat
Carry-On Bag	No	10 × 16 × 22 inches	No published limit
Checked Bag	No	80 linear inches	50 lbs
Overweight Bag	No	N/A	Over 50 lbs

Note: Allegiant bag prices vary by route and when baggage is purchased. Fees shown during booking are the most accurate for your itinerary. 

What Is the Cheapest Way to Travel on Allegiant?

For most travelers, the cheapest option is traveling with only a personal item. Once carry-on bags and checked baggage are added, the total trip cost can increase quickly compared with the advertised base fare. 

Why Allegiant Baggage Fees Are Different From Most Airlines

Two things about Allegiant baggage stand out compared with most US carriers.

First, Allegiant’s checked bag rules use strict size and weight checks, with overweight fees applied to bags over 50 lbs. This catches travelers off guard regularly, especially on longer trips where bags tend to be packed more heavily. 

Second, Allegiant charges for carry-on bags on all fares. If you arrive at the gate with an unpaid carry-on, you will usually pay the highest available rate. 

How Much Does Allegiant Charge for Carry-On Bags?

Allegiant carry-on fees are not fixed. They use dynamic pricing based on route, demand, and when you add the bag.

General pricing pattern:

• Added during booking online: lowest available rate
• Added after booking online: higher than the booking rate
• Added at the airport counter: higher still
• Added at the gate: highest rate available

The gap between booking rate and gate rate on Allegiant can be significant. Travelers who add carry-on bags at the gate consistently pay the most. Adding your carry-on during booking is usually the most cost-effective option. 

Your carry-on must fit within 10 × 16 × 22 inches and be stored in the overhead bin. Bags that exceed this size may be checked, and additional fees apply.

Compared with Spirit Airlines and Frontier Airlines, Allegiant Air follows a similar ultra-low-cost model where baggage is usually a paid add-on. In contrast, Southwest Airlines and Alaska Airlines generally include more baggage benefits in the base fare, making it important to compare total trip costs rather than ticket price alone. 

How Much Does Allegiant Charge for Checked Bags?

Like carry-on bags, Allegiant checked bag fees vary by route, timing, and how many bags you check.

When You Add the Bag	Typical Cost
During booking online	Lowest rate
After booking online	Higher than booking
At the airport counter	Higher still
At the gate	Highest rate

First bag fees are lower than second bag fees. Third and additional bags cost progressively more. Always add checked bags online during or shortly after booking to secure the lowest available rate.

For a full comparison of checked bag fees across airlines, see our airline baggage fee comparison guide.

What Is Allegiant’s Checked Bag Weight Limit?

The standard weight limit for Allegiant checked bags is 50 lbs per bag, with a maximum size of 80 linear inches (length + width + height).

This 50 lb limit is similar to the standard used by many US airlines. On a practical level, this means:

A bag that would be acceptable on many major airlines may trigger an overweight fee on Allegiant. This often happens on return trips when travelers pack souvenirs, gifts, or extra clothing. 

Weighing your bag at home with a luggage scale before travel is the single most effective step to avoid overweight fees on Allegiant. For bags close to the limit, redistributing a few pounds into your carry-on or personal item is easier than paying the fee at the airport.

Should You Buy Baggage on Allegiant?

Buying baggage is usually worth it if:

• Your trip is longer than 3 days
• You need carry-on space for extra clothing or essentials
• You’re likely to return with souvenirs or additional items

You can often skip baggage if:

• You’re taking a 1–2 day trip
• Everything fits in a personal item
• Keeping costs as low as possible is the priority

For many travelers, deciding this before booking is one of the easiest ways to avoid unexpected baggage costs later.

Allegiant Overweight and Oversized Baggage Fees

Bags that exceed 50 lbs incur overweight fees. Bags that exceed 80 linear inches incur oversized fees. If a bag is both overweight and oversized, both fees apply together.

Overweight baggage fees apply when a checked bag exceeds the airline’s published weight allowance. 

Splitting weight across two bags is often more cost-effective than paying an overweight fee on a single heavy bag, particularly when one of those bags can be kept as a carry-on.

Real Example: Las Vegas to Orlando on Allegiant

A traveler books an Allegiant base fare from Las Vegas to Orlando. The ticket price looks excellent. They plan to bring one carry-on and one checked bag.

If they add both bags during booking, the carry-on fee plus the checked bag fee at the lowest available rate.

If they forget to add bags and pay at the gate, the same two bags can cost significantly more,Airport and gate baggage purchases are typically more expensive than purchasing baggage during booking. 

On a round trip, that difference applies both ways. Two bags, two directions, at gate pricing adds up quickly on a carrier where the entire appeal is the low base fare.

Planning baggage during booking helps avoid these extra costs altogether.

What Often Happens at the Airport?

Many travelers remember to purchase baggage but forget to check weight.On Allegiant, a bag that exceeds the 50 lb limit can trigger an additional fee at check-in, even if the baggage was prepaid online.

Who Pays More Than They Need To on Allegiant?

Most unexpected Allegiant baggage charges come from a small number of situations:

• Travelers who forget to add bags at booking and pay airport or gate rates instead
• Packed bags over 50 lbs triggering overweight fees — particularly on return journeys
• Personal items too large to fit under the seat being reclassified as carry-ons at the gate
• Assuming carry-on is included because it is on other airlines
• Multiple bags on a round trip where fees apply both directions without pre-planning

None of these are difficult to avoid. The common thread is not checking baggage costs and rules before booking.

How Allegiant Baggage Compares to Other Low-Cost Airlines

Compared with Spirit Airlines and Frontier Airlines, Allegiant follows a very similar ultra-low-cost model where only a personal item is included in the base fare. Carry-on bags and checked bags are paid add-ons on all three carriers.

Where Allegiant differs slightly is in its strict 50 lb checked bag weight limit and its route network — Allegiant primarily serves leisure destinations and smaller regional airports, which affects how frequently baggage rules are applied. 

Compared with Alaska Airlines or Southwest Airlines, Allegiant provides significantly less in the base fare. Both Alaska and Southwest include carry-on access by default, making total trip cost comparisons important before assuming Allegiant is cheaper overall.

Best Strategy for Keeping Allegiant Baggage Costs Low

• Add all bags during booking — this is always the cheapest point to purchase on Allegiant
• Travel with a personal item only when the trip allows — zero additional baggage cost
• Weigh checked bags at home — the 50 lb limit is easy to exceed on longer trips
• Measure your personal item — Allegiant checks sizes more actively than many travelers expect
• Avoid gate purchases entirely — gate bag fees are the highest Allegiant charges
• On round trips, add bags for both directions at the same time during booking

For cabin bag limits and personal item requirements, see our Allegiant carry-on size rules guide. If you’re comparing seating costs, check our Allegiant seat selection cost breakdown. For a broader comparison of baggage charges across carriers, visit our airline baggage fee comparison (US airlines) guide. Travelers looking to pack more efficiently may also find our personal item packing tips guide useful. 

Before You Fly with Allegiant

Allegiant baggage fees and policies can change. Always confirm current fees, size limits, and weight rules directly at allegiantair.com before your flight. Fees vary by route and travel date.

Quick Recap

Allegiant Air includes only one free personal item with most tickets. Carry-on bags and checked baggage are paid add-ons, and fees generally increase the closer you get to departure. Buying baggage during booking is usually the cheapest option, while airport and gate purchases are the most expensive. Checked bags are typically limited to 50 lbs, with overweight and oversized fees applying when limits are exceeded.

The information in this guide is based on publicly available Allegiant Air baggage policy and standard airline practices as of June 2026. Always confirm current details directly at allegiantair.com before your flight.

Frequently Asked Questions (FAQs)

Flytripinfo.com provides independent travel guidance and is not affiliated with Allegiant Air.

Author: Travel SEO Editorial Team

Reviewed by: Airline Policy Analyst

Last verified: June 2026 

Disclaimer: All information on Flytripinfo.com is provided for general travel guidance only. Airline policies, baggage fees, and allowances can change at any time without prior notice. While we strive to keep our content accurate and updated, travelers should always verify details directly with the airline before their journey. Flytripinfo.com is not responsible for any errors, delays, or decisions made based on the information provided.