{Check Before You Fly} Allegiant Carry-On Bag Size Guide (2026)
If you want to bring both a backpack and a purse, one item must fit inside the other unless you have purchased a carry-on bag allowance.
Mia Carter
Planning to fly with Allegiant Air? Understanding the allegiant carry on bag size requirements before arriving at the airport can help you avoid unexpected charges and make boarding much smoother. Whether you're traveling for business or vacation, knowing the latest baggage rules can save both time and money.
In this guide, we'll cover Allegiant's carry-on policy, personal item limits, baggage fees, and answers to the most commonly asked traveler questions.
What Size Bag Can I Carry-On Allegiant for Free?
Every passenger flying with Allegiant is allowed one personal item free of charge. The approved allegiant personal bag measurements are:
- 16 x 15 x 7 inches (40 x 38 x 18 cm)
- Must fit completely under the seat in front of you
Examples of acceptable personal items include:
- Small backpack
- Purse
- Laptop bag
- Briefcase
A standard carry-on bag is not included with most base fares and must be purchased separately. The maximum allegiant carry on bag size allowed is:
- 22 x 14 x 9 inches (56 x 36 x 23 cm), including handles and wheels
How Strict Is Allegiant on Carry-On Size?
Allegiant is generally strict when it comes to baggage dimensions. Airport staff may measure bags using sizing devices at the gate or check-in counter.
If your bag exceeds the approved allegiant carry on bag size, you may be required to check it and pay additional allegiant baggage fees.
To avoid surprises:
- Measure your bag before travel
- Include wheels and handles in measurements
- Pack efficiently to prevent overstuffing
Travelers who purchase baggage online in advance typically pay less than those who add bags at the airport.
Can I Bring a Backpack and a Purse on Allegiant?
In most cases, passengers can bring only one free personal item onboard.
If you want to bring both a backpack and a purse, one item must fit inside the other unless you have purchased a carry-on bag allowance.
For example:
✅ Small purse inside a backpack
✅ Backpack purchased as a carry-on plus a personal item
❌ Separate backpack and purse without a carry-on purchase
Understanding the allegiant personal bag measurements can help ensure both items comply with airline rules.
How Do I Know If My Bag Is Carry-On Size?
The easiest way to determine whether your bag qualifies as a carry-on is to measure:
- Height
- Width
- Depth
For Allegiant, the maximum approved allegiant carry on bag size is 22 x 14 x 9 inches.
You should also pay attention to allegiant baggage weight restrictions if checking luggage. While carry-on bags do not have a strict published weight limit in many situations, checked bags generally must not exceed 50 pounds.
When checking luggage, travelers should also review allegiant air checked baggage dimensions. Checked bags are typically limited to a total linear dimension of 80 inches (length + width + height).
Allegiant Baggage Fees
Allegiant baggage fees vary depending on:
- Travel route
- Time of purchase
- Number of bags
Purchasing baggage during booking is usually the most affordable option. Fees often increase when baggage is added after booking or at the airport.
Final Thoughts
Knowing the current allegiant carry on bag size rules can help you travel confidently and avoid unnecessary charges. Remember that only one personal item is free, while larger carry-on bags require an additional purchase. Double-check your bag dimensions, understand allegiant baggage weight limits, and review allegiant air checked baggage dimensions before your trip. A little preparation can help make your Allegiant flight smoother, faster, and more budget-friendly.
