Mastering Underseat Luggage: The Key To Hassle-Free Travel
Traveling light isn’t just about packing smart—it’s an art. Understanding the right underseat luggage size is crucial for savvy flyers. With airlines cracking down on baggage rules, knowing the correct dimensions can save you time, money, and stress. A well-chosen underseat bag keeps your essentials close, ensuring maximum comfort during your journey.

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Navigating airport security can feel like running an obstacle course, but mastering underseat luggage size requirements makes it a breeze. Choosing the right bag not only enhances your travel experience but also ensures you stay compliant with airline policies. Let’s dive into what size bag fits under an airplane seat.
Underseat Luggage Size for Popular Airlines
Different airlines have slightly different rules for the size of underseat bags or personal items based on their planes' unique dimensions. Here's a breakdown of underseat luggage dimensions for some of the biggest airlines:
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Alaska Airlines Underseat Dimensions
Alaska Airlines doesn’t specify exact dimensions for underseat luggage, but they do provide carry-on guidelines. For carry-ons, the size limit is 22 inches by 14 inches by 9 inches. To ensure your underseat bag fits, aim for something smaller—around 14 x 12 x 9 inches. Think of this as a good rule of thumb to avoid any surprises at the gate.
Southwest Underseat Dimensions
Southwest Airlines, one of the world’s largest low-cost carriers, allows passengers to bring one personal item that fits under the seat. While they don’t specify an exact size, they recommend sticking to items like cameras, briefcases, food containers, or laptops in cases. To be safe, keep your personal item within 18.5 x 13.5 x 8.5 inches.
Frontier Airlines
Frontier Airlines keeps things straightforward with a clear guideline: personal items should measure no more than 18 x 14 x 8 inches. They even offer measuring boxes at airports to help you double-check before boarding. No guessing games here!

Delta Airlines
Delta Airlines suggests personal items like purses, laptop bags, or similar-sized items that fit comfortably under the seat in front of you. However, the exact dimensions depend on the aircraft model. For example:
- Bombardier CRJ200: 18 x 16 x 10.5 inches
- Embraer 175: 17 x 16 x 7.8 inches
Regardless of the plane, remember that no bag should exceed 45 linear inches combined. It’s always better to err on the side of caution and choose a smaller bag.
Sun Country Airlines
Sun Country Airlines permits one personal item per passenger, such as a purse, backpack, or other carry-on, to be stored under the seat. To ensure it fits, make sure your bag doesn’t exceed 17 inches by 13 inches by 9 inches. Simple, right?
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JetBlue
JetBlue limits underseat baggage to a maximum size of 17 inches by 13 inches by 8 inches. If you're flying Blue Basic, you’re restricted to just one personal underseat item—no carry-on bag allowed. Plan accordingly if you’re traveling light!

American Airlines
American Airlines requires personal items like purses or small handbags to fit under the seat in front of you. According to their policy, these items should measure no more than 18 x 14 x 8 inches (45 x 35 x 20 cm). But wait, there’s more! Some items, like diaper bags (one per child), breast pumps, and small soft-sided coolers, don’t count toward your personal item limit. Score!
United Airlines
As the largest airline in the world by destination count, United Airlines has a pretty standard policy for personal items. Their maximum size is 9 inches by 10 inches by 17 inches. Not too shabby for keeping your essentials close.
Allegiant Air
Allegiant Air lets passengers bring free personal luggage onboard, but it must fit under the seat. According to their policy, personal items should not exceed 16 x 15 x 7 inches. Keep it compact, and you’re golden.
Spirit Airlines
Spirit Airlines keeps it simple: purses, laptop bags, or any personal item stored under the seat should measure no more than 18 inches by 14 inches by 8 inches. Handles and wheels are included in these dimensions, so keep that in mind when choosing your bag.

Air Canada
Air Canada sets a maximum size of 17 inches by 13 inches by 6 inches for personal items. Their policy covers a wide range of items, including carry-on bags, roller bags, backpacks, laptops, and even garment bags (with size and weight restrictions). Don’t forget about pets in carriers and sports equipment—they’re fair game too!
Standard Underseat Luggage Size in South Africa
FlySafair, a prominent South African airline, specifies that underseat luggage dimensions should not exceed 56cm x 36cm x 23cm. Additionally, you can bring one personal item, like a slimline laptop bag or handbag, but not both. This personal item should not exceed 40cm x 15cm x 20cm and must fit snugly under the seat in front of you.
What Size Is an Underseat Bag or Storage?
The size of an underseat bag, often referred to as a personal item, varies depending on the airline’s specific guidelines. Generally, the bag must fit under the seat in front of you, which can differ based on the aircraft model. Most airlines allow personal items up to 18 x 14 x 8 inches (approximately 45 x 35 x


