Navigating airline rules is more complex in 2026 because of recent policy shifts regarding checked bag fees and boarding procedures. Understanding the exact carry on luggage size southwest allows ensures you avoid extra costs and long lines at the gate. This guide covers the specific dimensions, personal item rules, and the best travel bags to maximize your packing space.
Southwest Carry On Luggage Size and Dimensions
The standard carry on luggage size southwest requires is 24 inches long, 16 inches wide, and 10 inches high. These measurements include wheels and handles, so it is vital to measure your suitcase from the very bottom of the wheels to the top of the handle grip. Unlike some international carriers, Southwest does not currently enforce a specific weight limit for carry on items, provided you can lift the bag into the overhead bin without assistance.
If your bag exceeds these dimensions, gate agents will require you to check it. For many years, Southwest was famous for two free checked bags, but this changed for certain fare types in May 2025. Keeping your bag within the carry on luggage size southwest limit is now more important than ever for budget conscious travelers. You can verify your bag size at the airport using the metal sizer bins located near the check in counters and gates.
Personal Item Size Allowed on Southwest in 2026
Every passenger is permitted one personal item in addition to their carry on bag. The maximum dimensions for a personal item on Southwest are 16.25 inches long, 13.5 inches wide, and 8 inches high. This item must fit completely under the seat in front of you. Common examples include purses, small backpacks, or laptop bags. If you are looking for a versatile option, the 3 in 1 Totebag is built for this purpose.
This tote is crafted with waterproof Nylon surfaced material and super high fiber PU leather, which is a sustainable vegan leather option. It features a specific food compartment that keeps items warm for several hours and padded built in storage for your laptop. Using a structured tote like this helps you stay organized while meeting the strict personal item requirements. You can browse more options in our collection of Stylish Bags for the Modern Professional.
Can a 24 Inch Luggage Be a Carry On Southwest?
Yes, a 24 inch suitcase is acceptable as long as the width and depth do not exceed 16 inches and 10 inches. Many standard carry on bags from other airlines are only 22 inches long, meaning Southwest actually has one of the more generous carry on allowances in the United States. This extra two inches of length allows for significantly more packing volume, especially for longer trips.
When selecting a bag to meet the carry on luggage size southwest standards, look for soft sided options or specifically designed duffels that can compress if needed. The Leather Duffel Bag is a prime choice for those who want to maximize their allowance. It is designed to fit as a carry on for all airlines, including Southwest. It uses water resistant PU leather and features a built in hanger and wrinkle resistant lining so your clothes arrive ready to wear.
Best Luggage Choices for Southwest Travelers
If you are planning a trip that lasts up to 10 days, the Luhxe Travel Bag 2.0 provides the maximum storage capacity while still fitting in the overhead compartment. This bag is also made from sustainable vegan leather and includes wheels that can be snapped on for easy transit through the airport and popped off when you need a more streamlined look. It allows you to pack everyday clothing and multiple dresses without the need for a bulky hard shell suitcase.
For students or weekend travelers, The Hoodie Backpack is an innovative choice that security agents generally accept without issue. It is designed to fit the carry on requirements for all major airlines. This backpack is made with waterproof material and can fit three days' worth of essentials, making it ideal for college students or light packers. You can find similar styles in our Backpacks and Totes for Students collection.
Southwest Baggage Fees After May 2025
A major change in Southwest history occurred on May 28, 2025. For tickets booked or changed on or after this date, passengers flying on Basic, Wanna Get Away Plus, and Anytime fares are charged for checked bags. According to the Southwest Airlines Newsroom, the cost is now $35 for the first checked bag and $45 for the second checked bag.
However, there are still ways to avoid these fees. Business Select fares still include two free checked bags. Additionally, Rapid Rewards A List Preferred members get two free bags, while A List members and Rapid Rewards Credit Card holders get their first checked bag for free. Because of these new fees, staying within the carry on luggage size southwest limits is the most effective way for most travelers to save money on every flight.
How Strict Is Southwest About Luggage Size?
Southwest is generally considered more relaxed than ultra low cost carriers, but they have become more diligent in 2026. Gate agents look for bags that clearly appear over the 24 inch height limit or those that are stuffed so full they cannot fit into the overhead bin sideways. If the flight is full, agents may perform more frequent size checks or ask passengers to voluntarily gate check bags for free.
To avoid being singled out, ensure your bag handles and wheels are not protruding excessively. Using a soft sided bag like our vegan leather duffels can be helpful because they can sometimes be squeezed into tight spaces more easily than rigid plastic suitcases. Check the FAA carry on guidelines for more information on general safety and storage rules during flight.
International Carry On Rules for Southwest Flights
When flying Southwest to international destinations like Mexico, the Caribbean, or Central America, the carry on luggage size southwest allows remains the same. However, international flights often have more stringent agricultural inspections. You must ensure that any food items carried in your personal item bag, like those in the 3 in 1 Totebag food compartment, comply with the customs regulations of your destination country.
It is also important to note that if you are connecting from a Southwest flight to a partner carrier for an international leg, the partner airline may have different size and weight restrictions. Always verify the rules for every airline in your itinerary to avoid unexpected fees at a foreign airport.
How to Purchase Additional Baggage Online
If you realize your gear will not fit within the carry on luggage size southwest dimensions, you should manage your bags online before arriving at the airport. You can add checked bags through the Southwest website or mobile app during the check in process, which begins 24 hours before departure. Paying for your bags online can sometimes save time at the kiosk, though the fees of $35 and $45 remain consistent regardless of where you pay.
For those traveling with special items like musical instruments or sports equipment, Southwest allows these to be carried on if they fit in the overhead bin or under the seat. If an instrument is too large for the carry on luggage size southwest limits but is fragile, you may have the option to purchase a seat for the item. Otherwise, it must be checked and will be subject to the standard checked bag fees unless you hold qualifying elite status or a specific fare class.
Tips for Maximizing Your Carry On Space
To make the most of the 24x16x10 inch space, use packing cubes or the rolling method for your clothes. The built in hanger systems in the Luhxe Travel Bag 2.0 and the Leather Duffel Bag are specifically designed to keep items flat, which reduces the overall volume your clothes occupy. This allows you to fit more into the same footprint without exceeding the carry on luggage size southwest regulations.
Always wear your heaviest items, such as boots or thick jackets, onto the plane. Use the small pockets in your personal item for heavy electronics and chargers. By shifting weight and volume to your personal item, you ensure your main carry on stays within the dimensions and is easy to lift. For more packing inspiration, explore our Gifts for Travelers collection to find gear that makes every trip more efficient.