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What Size Is A Carry On Suitcase For Southwest Airlines

Published:

Modified: 5 October 2026

by Kori Trimmer

What Size Is A Carry On Suitcase For Southwest Airlines

A Southwest Airlines carry-on suitcase must be no larger than 24 x 16 x 10 inches (61 x 41 x 25 cm), including handles and wheels. If your bag exceeds those dimensions, you may have to check it and pay applicable fees.

Having the right travel essentials can help you stay organized and avoid fees. For example, a portable luggage scale can prevent you from exceeding the weight limit and incurring additional costs—if you're wondering how much can your suitcase weigh on Southwest, checking before you fly saves time and money. A well-designed travel wallet keeps documents and currency organized, while packing cubes and neck pillows simplify your journey.

Southwest Airlines Carry-On Baggage Policy

Before we delve into the dimensions for carry-on suitcases, it's important to understand the carry-on baggage policy of Southwest Airlines. This will ensure you follow the guidelines and avoid any issues or extra fees at the airport.

Southwest Airlines allows each passenger to bring one carry-on bag and one personal item on board free of charge. The carry-on bag should fit in the overhead bin, while the personal item should fit under the seat in front of you.

This size restriction ensures the bag can fit comfortably into the overhead bin and allows for efficient boarding and stowing of luggage.

In addition to the carry-on bag, passengers are allowed to bring a personal item such as a purse, briefcase, laptop bag, or small backpack. The personal item should have dimensions that fit under the seat in front of you.

It's important to note that if your carry-on bag or personal item exceeds the specified dimensions or is too large to fit in the overhead bin or under the seat, you may be required to check it in and pay applicable fees.

Southwest Airlines also has restrictions on the number of carry-on bags allowed per passenger. While one carry-on bag and one personal item are allowed, additional items such as jackets, umbrellas, food containers, and duty-free purchases are also permitted.

However, it's advisable to check the official Southwest Airlines website or contact the airline directly for the most up-to-date and detailed information regarding their carry-on baggage policy. This will ensure you have accurate information and can plan accordingly.

Now that we understand the carry-on baggage policy of Southwest Airlines, let's explore the dimensions for carry-on suitcases to ensure you choose the right size for your travels. If you are wondering how much can your suitcase weigh on Southwest, check the airline's official site for weight limits. Also, to ensure your suitcase size fits under an airline seat, verify your personal item's dimensions against your specific seat.

Dimensions for Carry-On Suitcases

Choosing the right size carry-on suitcase is crucial to ensure it meets Southwest Airlines’ requirements and fits in the overhead bin. While Southwest provides this specific size restriction, understanding ideal suitcase dimensions helps you pack efficiently.

The most common and widely accepted carry-on suitcase height is around 21–22 inches, offering a good balance between capacity and maneuverability without exceeding the weight limit. For width and depth, a typical suitcase is 14–15 inches, ensuring it fits easily in the overhead bin and leaves space for other passengers’ luggage.

When choosing a suitcase, consider the expandability feature. Some models allow you to increase capacity when needed, but be mindful that once expanded, the suitcase may not fit within Southwest’s size restrictions. The ideal shape is rectangular or square, as it maximizes space and makes packing easier.

It’s crucial to check the manufacturer’s specifications and ensure the dimensions meet Southwest’s limits. Remember to include handles, wheels, and any external pockets or compartments when measuring. Also, keep in mind that different airlines may have varying size restrictions, so if you travel with multiple carriers, choose a suitcase that meets the most stringent requirements.

By selecting a carry-on suitcase that adheres to the recommended dimensions, you can avoid inconvenience or additional fees at the airport. For example, knowing how much can your suitcase weigh on Southwest helps you pack efficiently, and choosing a suitcase size fits under an airline seat ensures your personal item is compliant.

In the next section, we’ll explore the weight limit for carry-on suitcases on Southwest Airlines.

Weight Limit for Carry-On Suitcases

In addition to size restrictions, it's important to be aware of the weight limit for carry-on suitcases on Southwest Airlines. While there is no specific weight restriction for carry-on bags, Southwest Airlines has a general policy that states that you should be able to lift your carry-on bag into the overhead bin without assistance.

This policy is in place to ensure the safety of both passengers and airline staff, as excessively heavy carry-on bags can pose a risk during the boarding and stowing process.

While Southwest Airlines does not enforce a specific weight limit, it's good practice to keep your carry-on bag as light as possible. Aim to pack only the essentials and avoid overpacking, as heavy bags can be difficult to lift and maneuver.

It's worth noting that although there is no official weight limit, some airports and airlines may have their own weight restrictions and guidelines. This is especially true when it comes to international travel, as different countries may have varying regulations regarding carry-on baggage weight.

To ensure a smooth travel experience, it's advisable to check the weight restrictions of both Southwest Airlines and any connecting or destination airports. This will help you avoid any surprises or issues during check-in or security screenings.

One way to ensure that your carry-on suitcase remains within the weight limit is to opt for lightweight luggage materials. Many manufacturers offer suitcases made from lightweight materials such as polycarbonate or nylon, which can help reduce the overall weight of your bag.

If you believe that your carry-on bag may be approaching the weight limit, consider using a portable luggage scale to weigh it before heading to the airport. This small investment can save you from excess baggage fees or the hassle of rearranging your belongings at the check-in counter.

Remember that the weight limit for carry-on suitcases is a general guideline, and it's always best to err on the side of caution and pack as lightly as possible. By adhering to weight restrictions, you can ensure a stress-free travel experience and avoid any unexpected fees or inconveniences.

Now that you understand the dimensions and weight limits for carry-on suitcases on Southwest Airlines, let's move on to some tips for choosing the right size carry-on suitcase for your travels. For more on packing light, you might also want to know how much can your suitcase weigh on Southwest for connecting flights.

Tips for Choosing the Right Size Carry-On Suitcase

Choosing the right size carry-on suitcase is essential to ensure a smooth and hassle-free travel experience. Here are some tips to help you select the perfect suitcase for your needs:

  1. Check the airline's size restrictions: Before purchasing a carry-on suitcase, familiarize yourself with the size restrictions of Southwest Airlines. Ensure that the suitcase you choose complies with these height, width, and depth measurements.
  2. Consider your travel needs: Think about the duration and purpose of your trip. If you're going on a short weekend getaway, a smaller carry-on suitcase may be sufficient. However, for longer trips or if you need to pack bulkier items, consider opting for a larger-sized suitcase.
  3. Assess your packing style: Are you someone who tends to pack lightly and efficiently, or do you prefer having more options and packing extra items? Understanding your packing style can help you determine the size of the carry-on suitcase that best suits your needs.
  4. Keep weight in mind: Remember that the weight of your carry-on suitcase is important not just for complying with airline regulations but also for your own convenience. Look for lightweight suitcase options to minimize the overall weight of your luggage. For more details, check how much can your suitcase weigh on Southwest.
  5. Consider expandability: If you anticipate needing extra space during your trip, look for a carry-on suitcase with expandability features. Just keep in mind that once expanded, the suitcase may no longer fit within the size restrictions imposed by Southwest Airlines.
  6. Evaluate durability: Consider the durability of the suitcase material and construction. Look for sturdy materials like polycarbonate or ballistic nylon that can withstand the rigors of travel and protect your belongings.
  7. Check for organizational features: Look for suitcases with convenient organizational features like compartments, pockets, and dividers. These can help you keep your belongings organized and easily accessible during your journey.
  8. Consider mobility: Pay attention to the wheels, handles, and maneuverability of the carry-on suitcase. Opt for suitcases with smooth-rolling wheels and ergonomic handles that make it easy to navigate through busy airports.
  9. Read reviews: Before making a final decision, read reviews and feedback from other travelers who have used the carry-on suitcase you're considering. This can provide valuable insights into the suitcase's performance, durability, and overall quality.

By considering these tips, you can choose a carry-on suitcase that not only meets the size requirements of Southwest Airlines but also suits your travel needs, preferences, and style. The right carry-on suitcase will make packing and navigating through airports a breeze, ensuring a stress-free travel experience.

Now that you have the necessary knowledge to choose the right carry-on suitcase, let's explore other considerations for carry-on suitcases on Southwest Airlines in the next section.

Other Considerations for Carry-On Suitcases on Southwest Airlines

While understanding the dimensions and weight limits is crucial when it comes to carry-on suitcases on Southwest Airlines, there are a few additional considerations to keep in mind for a smooth travel experience:

  1. Security regulations: Ensure that your carry-on suitcase meets the security requirements set by the Transportation Security Administration (TSA). This may include having a TSA-approved lock or easily accessible compartments for electronic items during the security screening process.
  2. Ease of access: Opt for a carry-on suitcase with convenient access to your essentials. Look for features like front pockets or compartments that allow you to easily retrieve items like travel documents, electronics, and toiletries without needing to open the main compartment.
  3. Additional airline-specific policies: Although Southwest Airlines has general guidelines for carry-on baggage, be aware of any additional policies they may have. For example, they may have specific rules regarding the allowance of personal items or restrictions on certain types of items in the cabin.
  4. Compatibility with overhead bins: While complying with the size requirements of Southwest Airlines is important, also make sure your carry-on suitcase fits smoothly into the overhead bins. Avoid oversized or oddly shaped suitcases that may make it difficult to stow your bag or inconvenience other passengers.
  5. Consider a carry-on backpack: If you prefer a more versatile and mobile option, consider using a carry-on backpack instead of a traditional suitcase. A carry-on backpack not only provides ample storage space but can also be easier to maneuver through crowded airports and on uneven terrain.
  6. Personal item organization: Along with your carry-on suitcase, make sure your personal item is well-organized and meets the size restrictions. Use small bags or pouches to keep your essentials easily accessible, such as your passport, wallet, phone, and any necessary documents. To ensure your personal item fits, check if your suitcase size fits under an airline seat before you travel.
  7. Know your limits: While carry-on bags offer convenience, be mindful of what you can comfortably handle. Packing too much in your carry-on suitcase can make it heavy and difficult to maneuver, so be realistic about what you need for your trip.
  8. Consider the future: When investing in a carry-on suitcase, think about how it will fit into your future travel plans. Choose a durable and versatile option that can withstand frequent use and accommodate different types of trips.

By considering these additional factors, you can ensure that your carry-on suitcase not only meets the requirements of Southwest Airlines but also enhances your travel experience by providing convenience, organization, and ease of use throughout your journey.

Conclusion

Understanding Southwest Airlines’ carry-on baggage policy ensures a smooth journey.

When choosing a suitcase, consider your travel needs and packing style. Opt for a lightweight, durable bag that fits within these limits. Be mindful of security regulations and ease of access; a carry-on backpack can offer added mobility. To avoid surprises, always check if your suitcase size fits under an airline seat before flying.

For the most current information, review the official Southwest Airlines website. Staying informed helps you focus on enjoying your journey and creating lasting memories. Happy travels!