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Planning a trip with Southwest in 2026? Understanding the latest baggage rules can save you time, stress, and money at the airport. Unlike most major carriers, Southwest Airlines has built a reputation for being customer-friendly, particularly with their "Bags Fly Free" policy. However, "free" has limits, and there are specific fees for extra, overweight, or oversized items.

In this comprehensive guide, we break down everything you need to know about the Southwest Airlines baggage policy, including size restrictions for carry-ons, costs for checked luggage, and how to handle special items. Whether you are flying domestically or internationally, we’ve got the accurate, up-to-date information you need for a smooth journey. If you get confused or need personalized travel assistance, the experts at airfarepolicies are just a call away at +1-855-869-7071.

Southwest Baggage Policy at a Glance (2026)

Here is the quick summary for travelers who need the bottom line: Southwest allows two free checked bags per passenger, provided they meet weight and size limits. Carry-on luggage is also free. However, if you exceed these limits, have extra bags, or are traveling with sports equipment, fees will apply. This guide covers all the specifics for 2026 to ensure you aren’t caught off guard at the ticket counter.

Southwest Airlines Carry-On Policy: Size & Allowance

When it comes to carry-on luggage, Southwest keeps things fairly standard, but knowing the exact measurements can prevent you from having to gate-check your bag at the last minute.

What is the Southwest Airlines Carry On Baggage Size?

Every passenger is allowed one carry-on bag and one personal item (like a purse, laptop bag, or small backpack). The key is the size limit. The maximum dimensions for a carry-on bag are 10 x 16 x 24 inches. This includes the wheels and handles.

Pro Tip: If your bag looks bulky, use the airport’s sizing sorter at the gate before boarding. If it doesn't fit, you might be forced to check it at the gate, which, while free on Southwest, can be inconvenient as you'll have to wait for it at the baggage claim upon arrival.

Read Also:- Volaris Airlines Baggage Policy

Personal Items

Your personal item must fit entirely under the seat in front of you. Think small backpacks, purses, or totes. There isn't a strict size limit published, but if it can't fit under the seat, it will be counted as your main carry-on.

Southwest Airlines carry on policy remains one of the most generous in the industry because there is no weight limit for carry-on bags (as long as you can lift it into the overhead bin yourself). This is a huge relief for travelers carrying heavy camera equipment or books.

Southwest Airlines Checked Baggage Policy: Allowance & Fees

This is where Southwest truly shines. While legacy carriers like United or Delta now charge for the first checked bag, Southwest Airlines baggage allowance includes two free checked bags.

Southwest Airlines Checked Baggage: Free Bags

As of 2026, the "Bags Fly Free" policy is still in effect.

• First Checked Bag: Free

• Second Checked Bag: Free

These bags must adhere to the standard weight and size restrictions:

• Weight: Must not exceed 50 lbs (23 kg).

• Size: Total dimensions (length + width + height) must not exceed 62 inches.

Southwest Airlines Checked Bag Fees (Bags 3-5)

Once you move past those first two freebies, the fees are very competitive compared to other airlines.

• Third Checked Bag: $150

• Fourth Checked Bag: $150

• Fifth Checked Bag: $150

Southwest Airlines Checked Bag Fees (Bags 6-9)

For those moving houses or going on extended trips, the price increases slightly per bag.

• Sixth through Ninth Bag: $150 each

Note: These fees are per bag, one-way. If you are connecting through another city, you pay the fee at your origin for the entire itinerary.

Southwest Extra Baggage, Overweight & Oversize Fees

Even if you are only taking two bags, you might still incur fees if they are particularly heavy or large. This is a common area of confusion regarding the Southwest Airlines baggage cost.

Southwest Overweight Baggage Fee

If your bag weighs more than 50 lbs, you will be hit with an overweight fee in addition to any standard bag fees. If your bag is over 50 lbs but under 100 lbs, the fee is $100. However, if you are military personnel on active duty traveling on orders, these overweight limits are often waived—just make sure to have your orders ready at check-in.

Southwest Oversize Baggage Fee

A bag is considered oversized if its total dimensions exceed 62 inches. If it is between 63 and 80 inches, the oversize fee is $125. Any bag that exceeds 80 inches or 100 lbs is not accepted as checked luggage on Southwest. You would need to look into cargo shipping for those items.

Southwest Extra Baggage for Sports Equipment

Southwest is generally very friendly towards sports equipment. Items like golf bags, skis, and snowboards typically count as one of your free checked bags if they are within the standard weight limits. However, if the item is particularly large or heavy (like a surfboard), it may incur an oversize fee. Always check the specific sports equipment rules before you head to the airport.

Southwest Airlines Baggage Policy for Military Personnel

Southwest shows strong support for military travelers.

• Active Duty Military: When traveling on orders, active duty U.S. military personnel can check up to five bags free of charge, with a weight allowance of up to 100 lbs per bag.

• Dependents & Leisure Travel: If you are a military member traveling for leisure (not on orders), you still receive the standard two free bags, but the standard weight limit of 50 lbs applies.

Southwest Airlines Baggage Policy International vs. Domestic

While the core "two bags fly free" remains consistent, there are slight nuances when flying internationally with Southwest (which serves destinations in Mexico, Central America, and the Caribbean).

Southwest Airlines Baggage Policy Domestic Flights

The rules mentioned above apply to all domestic flights within the 50 United States, Puerto Rico, and the U.S. Virgin Islands. Two free bags, 50 lbs each, 62 inches total dimensions.

Southwest Airlines Baggage Policy International

For international travel, the rules are largely the same regarding the number of bags. However, international regulations regarding customs can affect how you claim and re-check your bags. Additionally, if your international itinerary involves a codeshare partner (though rare for Southwest), the partner's rules may apply.

The biggest difference for international is the potential for higher fees on extra baggage and stricter enforcement of size limits due to smaller regional jets used on some international routes.

Special Items and Prohibited Items

Knowing what you can and cannot pack is just as important as knowing the Southwest airlines luggage rules.

Southwest Checked Baggage Restrictions

• Firearms: Southwest does allow firearms in checked baggage, but they must be declared at the ticket counter, unloaded, and locked in a hard-sided case.

• Lithium Batteries: Spare lithium batteries (power banks) are prohibited in checked bags and must be carried in your carry-on.

• Alcohol: Alcoholic beverages over 140 proof are prohibited. Those under 140 proof are allowed in checked bags, subject to quantity limits.

Southwest Airlines Carry On Policy Restrictions

• Liquids: The TSA 3-1-1 rule applies: liquids must be in containers of 3.4 ounces (100ml) or less and fit in a single quart-sized bag.

• Sharp Objects: Leave knives, box cutters, and large scissors in your checked luggage.

How to Pay for Baggage and Check-In

Paying for extra bags is easiest if done online during check-in (24 hours before your flight). You can also pay at the airport kiosk or with a ticket agent. Southwest accepts all major credit cards. If you are unsure whether your bag is going to be overweight, it’s worth investing in a portable luggage scale.

If you are struggling to navigate the Southwest Airlines baggage allowance for a complex itinerary, don't hesitate to reach out for help. The team at airfarepolicies specializes in clarifying these rules. Give them a call at +1-855-869-7071 for quick and reliable assistance.

Southwest Airlines Baggage Policy vs. Competitors

To give you a better idea of the value Southwest provides, here is a quick comparison with other major US airlines regarding a standard economy ticket (one-way):

As the table shows, the southwest airlines baggage cost is effectively zero for the majority of leisure travelers, offering significant savings.

Tips to Avoid Extra Baggage Fees on Southwest

1. Pack Light and Use a Scale: The most common fee is the southwest overweight baggage fee. Avoid this by weighing your bag at home.

2. Combine Bags: If you are traveling with a companion, try to consolidate items. It is better to have two bags at 49 lbs each (free) than three bags (one free, two paid).

3. Fly During Promotions: Occasionally, Southwest offers promotions where they extend the "Bags Fly Free" policy to include third bags or waive fees for specific routes during the holidays.

4. Know Your Sports Equipment Rules: A golf bag that is under 50 lbs and 62 inches flies free. A surfboard might cost you an oversize fee. Check the specific sports equipment chart on the Southwest website before you leave.

Frequently Asked Questions (FAQ)

Here are some of the most common questions travelers have regarding the Southwest Airlines baggage policy.

Can I take a carry-on and a backpack on Southwest?

Yes. You are allowed one carry-on (stored in the overhead bin) and one personal item (like a backpack or purse) that fits under the seat. This is a standard part of the Southwest Airlines carry on policy.

What is the Southwest Airlines carry on baggage size limit?

The maximum size for a carry-on bag is 10 x 16 x 24 inches, including wheels and handles. If your bag is larger, you may be required to check it at the gate.

How much does it cost to check a third bag on Southwest?

The southwest extra baggage fee for a third checked bag (as well as the fourth and fifth) is $150 per bag, one-way.

Does Southwest charge for overweight bags?

Yes. If your bag weighs between 51 and 100 lbs, there is a southwest overweight baggage fee of $100 per bag, in addition to any standard bag fees.

Who can I call if I need help understanding the baggage rules?

Baggage policies can change, and exceptions can be confusing. If you need clarity or help with booking a flight with special baggage requirements, you can contact airfarepolicies for dedicated travel assistance at +1-855-869-7071. They can help you navigate the rules so you aren't surprised at the airport.

How strict is Southwest with carry-on size?

Southwest is generally reasonable, but if your bag clearly looks oversized and won't fit in the sizer, they will enforce the rules, especially on full flights. It's always best to adhere to the southwest airlines carry on baggage size limits to avoid being forced to check your bag.

Need Help With Your Travel Plans?

Understanding the fine print of airline contracts is not why most of us love to travel. Whether you are trying to figure out the Southwest Airlines baggage allowance for a family of five, or you need assistance booking a flight with a service animal, it helps to have an expert on your side.

At airfarepolicies, we provide up-to-date travel assistance and airline policy information to ensure your journey is as smooth as possible. We take the guesswork out of travel. If you have a question about your upcoming flight or need help managing a booking, our team is ready to help.

Contact airfarepolicies today at +1-855-869-7071 for personalized support. We are here to help you navigate the skies with confidence.

Conclusion

Southwest Airlines continues to be a leader in customer-friendly policies, and their Southwest Airlines baggage policy for 2026 remains one of the best in the business. By offering two free checked bags, they save the average family hundreds of dollars compared to competitors. However, to truly take advantage of these savings, you must be aware of the fees associated with overweight, oversized, or extra bags.

Always double-check your luggage dimensions and weight before heading to the airport, and remember that rules for international flights and special items can differ. By following the guidelines in this article, you can pack smarter, save money, and avoid last-minute stress at the check-in counter.

If you ever find the rules overwhelming or need assistance with your travel itinerary, remember that professional help is available. The experts at airfarepolicies are only a phone call away at +1-855-869-7071. Safe travels