Understanding Southwest Checked Bag Size — A Complete Traveler’s Guide

November 12, 2025

Learn about Southwest checked bag size limits, weight allowance, and packing tips to avoid extra fees. Fly smart and travel stress-free with this guide!

Introduction

When flying with Southwest Airlines, understanding the Southwest checked bag size policy can save you from unnecessary stress and fees. Many travelers love Southwest for its generous baggage allowance — but knowing the exact dimensions and weight limits ensures a hassle-free journey.

This detailed guide covers everything from the Southwest checked bag size, weight limits, and rules to packing tips and oversized baggage details.

1. Southwest Checked Bag Size Policy

Southwest Airlines is known for offering one of the best baggage policies in the U.S. Passengers can check two bags for free, which is rare among major carriers.

Maximum size: 62 linear inches (length + width + height).
Maximum weight: 50 pounds per bag.

This means that your suitcase must not exceed these limits to avoid additional fees. If your luggage goes beyond these measurements, it may be subject to oversize or overweight baggage charges.

2. Oversized and Overweight Baggage Rules

If your bag exceeds 62 linear inches, it’s classified as oversized. Southwest charges an oversize fee of $125 per bag. Similarly, if your checked bag weighs between 51 and 100 pounds, an overweight fee of $125 applies. Bags over 100 pounds are not accepted.

Example Calculation of Bag Size:
To calculate your bag’s linear dimensions, measure the length + width + height.
For instance:

30” (length) + 20” (width) + 12” (height) = 62 linear inches, which is acceptable.

3. Southwest Airlines Free Bag Policy Advantage

Southwest stands apart from other airlines by allowing passengers to check two bags for free on every ticket. That means you can travel with more luggage without worrying about paying for every additional item.

This makes the Southwest checked bag size policy ideal for families, business travelers, or vacationers carrying extra gear.

4. Tips for Staying Within the Checked Bag Size Limit

To make sure your luggage meets Southwest’s standards, follow these quick tips:

Use a measuring tape to verify your bag’s size before traveling.
Avoid hard-shell suitcases that expand beyond 62 inches.
Pack heavier items like shoes near the wheels to distribute weight evenly.
Opt for lightweight suitcases to avoid exceeding the 50-pound weight limit.

5. Special and Sports Equipment

Southwest also accommodates sports equipment such as skis, golf bags, and surfboards, provided they meet the checked bag size restrictions. However, oversized sports gear may still incur a fee. Always check the Southwest sports equipment policy before flying.

6. International Flights and Checked Bag Rules

For international routes, the same Southwest checked bag size and weight limits apply. However, always review specific route details, as customs or connecting airline policies might differ.

7. Baggage Claim and Lost Luggage Assistance

In case your bag is delayed or misplaced, Southwest’s Baggage Service Office helps track and recover it. Keep your baggage claim receipt handy for reference.

Conclusion

The Southwest checked bag size policy is one of the most traveler-friendly in the industry. With two free checked bags and clear size rules, Southwest makes air travel simple and affordable. Always measure your luggage, pack smartly, and enjoy a smooth flying experience.

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