Southwest Airlines Carry-On Size Explained

When you’re flying with Southwest Airlines, knowing the carry-on size and baggage rules ahead of time can save you from unnecessary stress at the airport.
Southwest is known for its flexible baggage policy, but the airline still has strict rules about carry-on bag dimensions and personal items. Understanding these before you pack can help you breeze through check-in and boarding without paying extra fees or repacking your bag at the gate.

What Is the Carry-On Size for Southwest Airlines?

The carry-on size Southwest allows is 24 x 16 x 10 inches (61 x 41 x 25 cm), including handles and wheels.
Your bag must fit comfortably in the overhead bin. If your luggage exceeds these carry-on bag dimensions Southwest, flight attendants may ask you to check it at the gate.

This rule applies to all passengers, regardless of your fare type or destination. Whether you’re taking a quick business trip or a weekend vacation, always measure your luggage before leaving home.

Carry-On Baggage vs. Personal Item

Along with your main carry-on bag, Southwest allows one personal item per passenger.
Your personal item should fit under the seat in front of you and can be a purse, backpack, briefcase, or small duffel.
The maximum personal item size is 16.25 x 13.5 x 8 inches.

If you’re traveling with tech gadgets, it’s best to use your personal item for essentials like a laptop, tablet, passport, or chargers, keeping your carry-on for clothes and accessories.

Southwest Carry-On Weight Limit

One of the best parts about Southwest is that there’s no specific carry-on weight limit.
Unlike many airlines that cap cabin baggage weight at 7 kg or 10 kg, Southwest focuses on size, not weight.
The only rule is that you must be able to lift your own bag into the overhead compartment without assistance.

This policy makes it easier for travelers to pack freely, especially those carrying camera gear, laptops, or heavy shoes.

Tips for Staying Within the Southwest Carry-On Size Limit

Even though Southwest is generous with its baggage rules, smart packing is still key.
Here are a few expert tips to make sure your carry-on baggage size fits Southwest’s guidelines perfectly:

1. Use soft-sided luggage – It’s easier to fit into the overhead bin.

2. Measure your bag with wheels included – This is where most people go wrong.

3. Pack heavy items near the base – This helps you lift the bag easily.

4. Use packing cubes – They keep clothes compact and organized.

5. Wear bulky items – Jackets and boots take up space; wear them instead.

Following these simple tricks ensures your carry-on bag size Southwest stays compliant without sacrificing essentials.

Southwest Carry-On Policy Compared to Other Airlines

Many travelers prefer Southwest Airlines because its baggage policy is among the most traveler-friendly in the U.S.
Most airlines charge for checked bags, but Southwest allows two free checked bags for every passenger.
That means even if your carry on dimensions Southwest bag is full, you can still bring extra items without paying additional fees.

Budget airlines like Spirit or Frontier have smaller carry-on size limits and higher baggage fees, making Southwest a far better choice for those who travel with multiple bags or bulky gear.

Common Mistakes Travelers Make

Even with clear guidelines, many passengers still make small but costly mistakes with their carry-on baggage.
Here are a few to watch out for:

• Forgetting to include wheels and handles when measuring.

• Bringing an extra tote or shopping bag that exceeds the personal item limit.

• Packing large bottles of liquids that violate TSA’s 3-1-1 rule.

• Using hard-shell luggage that doesn’t compress easily.

Avoiding these pitfalls keeps your trip stress-free and saves you from last-minute gate checks.

Best Luggage Options for Southwest Airlines Carry-On

If you’re shopping for a new suitcase that fits Southwest carry-on dimensions, here are some traveler-approved options:

• Travelpro Maxlite 5 – Lightweight and perfectly sized at 23".

• Samsonite Winfield 3 DLX – Durable and compliant with most U.S. airlines.

• Away Bigger Carry-On – Stylish, roomy, and ideal for frequent flyers.

• Delsey Helium Aero – Smooth wheels and expandable space without exceeding limits.

Choosing the right suitcase ensures you never worry about exceeding the carry-on size Southwest Airlines allows.

How to Double-Check Before You Fly

Before heading to the airport, do a quick pre-flight baggage check:

• Measure your bag one final time.

• Place all liquids in a clear quart-sized bag.

• Keep essentials like IDs and chargers in your personal item.

• If you’re close to the carry-on size limit, remove one or two bulky items.

A 2-minute check can save you a 20-minute delay at boarding.

Final Thoughts

Traveling with Southwest Airlines is simple and stress-free once you understand their baggage policy.
The carry-on size Southwest Airlines allows gives you plenty of space for essentials, while the absence of a carry-on weight limit adds extra flexibility.
By measuring your luggage, packing smart, and following the airline’s carry-on rules, you’ll enjoy a smooth boarding experience and avoid last-minute hassles.

Whether you’re flying for work, leisure, or a weekend getaway, this carry-on size guide for Southwest Airlines ensures you pack confidently every single time.