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How To Measure A Duffel Bag For A Southwest Carry-On

Published:

Modified: 5 October 2026

by Ebony Obregon

How To Measure A Duffel Bag For A Southwest Carry-On

To measure a duffel bag for a Southwest carry-on, lay it flat on its longest side and measure the length, width, and height in inches, then confirm each dimension does not exceed 24 x 16 x 10 inches (length × width × height). Southwest’s carry-on limit is 24 inches long, 16 inches wide, and 10 inches high, including wheels and handles.

Understanding Southwest Carry-On Guidelines

Southwest Airlines allows each passenger to bring one carry-on bag and one personal item onboard. The carry-on bag should have maximum dimensions of 24 x 16 x 10 inches (length × width × height). This includes the wheels and handles. Any bag exceeding these dimensions may be required to be checked in.

In addition to the carry-on bag, Southwest allows passengers to bring a personal item such as a purse, laptop bag, or small backpack. The personal item must fit under the seat in front of you. Southwest does not publish specific size limits for personal items; only that one smaller item must fit under the seat.

Southwest Airlines does not have weight restrictions for carry-on bags, but they must be able to fit in the overhead bin or under the seat. Therefore, the focus when measuring your duffel bag should be on the dimensions rather than the weight.

Measuring the Length of the Duffel Bag

To accurately measure the length of your duffel bag, follow these steps:

  1. Begin by laying your duffel bag flat on its longest side, with the zipper facing up.
  2. Using a measuring tape or ruler, measure the distance from one end of the bag to the other end in a straight line. Make sure to include any external pockets or handles in your measurement.
  3. Record the measurement in inches or centimeters, depending on your preference.

Southwest Airlines measures the length of a bag by its longest side, regardless of whether it’s horizontal or vertical. This means that if your duffel bag is longer in the vertical orientation, that length will be considered.

Once you have obtained an accurate measurement for the length of your duffel bag, you can proceed to the next step: finding the width.

Finding the Width of the Duffel Bag

Measuring the width of your duffel bag is crucial to ensure compliance with Southwest Airlines’ carry-on restrictions. Here’s how you can find the width:

  1. Place your duffel bag on a flat surface, with one of the shorter sides facing up.
  2. Include any external pockets or bulges in your measurement.
  3. Record the measurement in inches or centimeters, as per your preference.

It is essential to measure the width accurately, as exceeding Southwest’s specified width dimension of 16 inches may cause you to be required to check in your bag.

Once you have measured the width of your duffel bag, you can move on to the next step: determining the height.

Determining the Height of the Duffel Bag

To accurately determine the height of your duffel bag, follow these steps:

  1. Stand your duffel bag upright on one of its longer sides.
  2. Using a measuring tape or ruler, measure the distance from the bottom of the bag to the highest point of the bag in a straight line.
  3. Include any external pockets, handles, or other protrusions in your measurement.
  4. Record the measurement in inches or centimeters.

It’s important to measure the height of the duffel bag accurately, as exceeding the specified height dimension of 10 inches set by Southwest Airlines may result in having to check in your bag.

Now that you have determined the height of your duffel bag, it’s time to calculate the total dimensions of the bag by considering all three measurements: length, width, and height.

Calculating the Total Dimensions of the Duffel Bag

Here’s how you can do it:

  1. Take the measurements you obtained for the length, width, and height of your duffel bag.
  2. Add the length, width, and height measurements together.
  3. The sum of these three measurements will give you the total dimensions of your duffel bag.

It’s important to remember that the total dimensions of your duffel bag must not exceed Southwest Airlines’ carry-on size limits of 24 x 16 x 10 inches.

By calculating the total dimensions of your duffel bag, you can determine whether it meets Southwest’s requirements. If the sum of the three measurements exceeds the specified dimensions, you may need to consider using a smaller bag or checking your duffel bag.

Now that you have the total dimensions of your bag, it’s essential to ensure it complies with Southwest’s carry-on restrictions to avoid any last-minute issues at the airport.

Ensuring the Duffel Bag Meets Southwest Carry-On Restrictions

After measuring and calculating the dimensions of your duffel bag, it is important to ensure it meets Southwest Airlines’ carry-on restrictions to avoid any inconveniences during your travel. Here are some tips to help you ensure compliance:

  1. Double-check the maximum dimensions: Referencing Southwest’s carry-on guidelines, verify that the total dimensions of your duffel bag (length + width + height) do not exceed the specified limits of 24 x 16 x 10 inches.
  2. Consider compressible duffel bags: If your duffel bag is slightly larger than the maximum dimensions, look for compressible options that can be cinched or compressed to meet the requirements.
  3. Remove any excess items: Before measuring, remove any bulging or protruding items from your bag that can affect its dimensions. This will give you a more accurate measurement.
  4. Check for flexibility: Ensure that your duffel bag is collapsible or has the ability to be slightly compressed, allowing it to fit into the airline’s sizing device or overhead compartments.
  5. Check weight restrictions: While Southwest Airlines does not have specific weight restrictions for carry-on bags, it is important to consider the weight of your duffel bag, as you will still need to handle it during your journey.

By following these tips, you can increase the chances of your duffel bag meeting Southwest Airlines’ carry-on restrictions. This will help you avoid any additional fees or the need to check in your bag at the last minute.

Remember, it is always prudent to reconfirm the carry-on restrictions and regulations of Southwest Airlines before your travel to ensure compliance and a hassle-free experience.

Conclusion

Ensuring that your duffel bag meets Southwest Airlines’ carry-on restrictions is essential for a smooth and hassle-free travel experience. By following the steps outlined in this article, you can accurately measure your bag and determine its compliance with Southwest’s guidelines.

Remember to measure the length, width, and height of your duffel bag carefully, and calculate the total dimensions by adding them together. Taking into account any compressible options, strict weight limits, and the flexibility of your bag is also important.

By adhering to Southwest’s carry-on guidelines, you can avoid any surprises or additional fees at the airport. Being prepared and knowledgeable about the size restrictions will help you make the necessary adjustments to ensure your duffel bag fits within the specified dimensions.

Whether you are a frequent traveler or planning your next adventure, having a duffel bag that meets Southwest’s carry-on restrictions is a smart choice. It provides you with convenience, saves you time, and allows you to have your essentials easily accessible during your journey.

So, the next time you pack for your Southwest flight, make sure to measure your duffel bag properly and ensure it falls within the specified dimensions. This way, you can enjoy a stress-free travel experience and focus on making lifelong memories at your destination.