Southwest Airlines Baggage Policy (2025)

Southwest Airlines Baggage Policy: How to Master Carry-On Rules and Travel Stress-Free

Flying with Southwest Airlines is often a hassle-free experience, especially since they are one of the few major U.S. airlines that allow two checked bags for free. However, confusion often arises when it comes to carry-on size rules. Knowing these rules in advance can save you time, money, and unnecessary stress at the airport. This guide will walk you through everything you need to know about Southwest’s carry-on and personal item policies, along with practical packing strategies to help you make the most of your free allowances.

5-Step Quick Checklist for Southwest Baggage

1. Measure your carry-on (24″ x 16″ x 10″) and personal item (16.25″ x 13.5″ x 8″).
2. Pack light and use space-saving methods like rolling clothes.
3. Wear bulky items (jackets, boots) to free up space in your carry-on.
4. Check Southwest’s website for current baggage policies and updates.
5. Arrive early to secure overhead bin space and avoid last-minute issues.

Southwest Carry-On Size: The Essentials

Southwest allows each passenger to bring one carry-on bag and one personal item for free. The carry-on bag must not exceed 24 inches (L) x 16 inches (W) x 10 inches (H), including wheels and handles. Personal items, such as a small backpack or laptop bag, must fit under the seat in front of you and cannot exceed 16.25 inches (L) x 13.5 inches (W) x 8 inches (H).

Why Carry-On Size Matters

• Faster Boarding: Southwest operates an open seating policy. Having a compliant carry-on ensures you can quickly secure overhead bin space and choose your preferred seat.
• Avoid Fees: Oversized carry-ons will be checked at the gate and could result in delays or additional costs.
• Stress-Free Travel: Knowing your luggage meets the size requirements allows you to focus on your trip instead of worrying about gate-checking your bag.

How to Ensure Your Carry-On Fits

Measuring your carry-on is essential to avoid surprises at the airport. Here are practical steps:

• Use a Carry-On Sizer: Consider purchasing a compact luggage sizer to test dimensions at home.
• Measure Correctly: Measure your carry-on’s length, width, and height, including wheels and handles, with a tape measure.
• Watch Expandable Zippers: If your bag expands, keep it zipped up when measuring to avoid exceeding size limits.

Pro Tip

Airports may have luggage sizers at check-in. If you’re unsure, test your bag before security to prevent last-minute gate checks.

Packing Tips for Southwest Carry-On Success

• Pack Light and Smart: Choose versatile clothing that can be mixed and matched. For example, a pair of jeans can be worn multiple times with different tops.
• Use Packing Cubes: These organizers save space and help keep your belongings neat.
• Roll, Don’t Fold: Rolling clothes is a proven way to maximize space and minimize wrinkles.
• Wear Your Bulkiest Items: Jackets and heavier shoes should be worn during boarding to save space.
• Bring a Collapsible Tote Bag: If you shop or pick up souvenirs, a lightweight foldable bag can serve as an extra carry-all for your return trip.

Don’t Forget the Personal Item

In addition to your carry-on, Southwest allows one personal item that fits under the seat. Examples include:

• Small backpacks or daypacks
• Purses or handbags
• Laptop bags or briefcases
• Camera bags
• Diaper bags

Ensure your personal item is compact enough to fit beneath the seat without obstructing safety features. If traveling with a pet, their carrier will count as either your carry-on or personal item. For details, check Southwest’s pet policy.

Southwest Baggage Fee Overview

Here’s a quick snapshot of Southwest’s baggage policy:

Note: Oversized or overweight checked bags (over 50 lbs or 62 linear inches) will incur additional charges.

Stay Updated with Southwest

Policies can change, so always confirm details on the official Southwest Carry-On Baggage Policy page.

FAQs About Southwest Airlines Baggage Policy

1. Can I bring two carry-on bags on Southwest?
No, Southwest allows only one carry-on bag plus one personal item per passenger.

2. What happens if my carry-on bag is too big?
If your carry-on exceeds the size limit, Southwest will check it at the gate. Depending on your checked bag count, you might incur additional fees.

3. Are pet carriers allowed in addition to my carry-on?
No, pet carriers count as either your personal item or carry-on. Make sure the carrier fits under the seat.

4. What’s the best way to avoid baggage fees on Southwest?
Stick to the two free checked bags, pack efficiently to avoid overweight fees, and ensure your carry-on complies with size rules.

Conclusion

Southwest Airlines’ baggage policy is one of the most passenger-friendly in the industry, thanks to the two free checked bags. However, carry-on rules must be followed to ensure a smooth boarding experience. By measuring your luggage, packing strategically, and using tools like packing cubes or collapsible totes, you can travel light and stress-free.