Free Guide to Southwest Airlines Baggage Fees

Understanding Southwest Airlines' Baggage Policy Basics

Southwest Airlines stands out in the airline industry because of its generous baggage policy compared to most major carriers. Unlike many airlines that charge for checked bags, Southwest includes two free checked bags for most passengers. This policy has remained consistent for decades and represents a significant savings for travelers who need to transport luggage.

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The first checked bag flies free for any passenger, as long as it meets Southwest's size and weight requirements. The bag cannot exceed 62 inches when you add the length, width, and height together (also called linear inches). Additionally, the weight limit is 50 pounds. The second checked bag also flies free under the same size and weight restrictions. These two free bags are available to all passengers regardless of which fare type they purchase.

Carry-on bags work differently from checked luggage. You may bring one personal item and one carry-on bag into the cabin at no charge. Your personal item might be a purse, backpack, laptop bag, or small briefcase. Your carry-on bag is typically a rolling suitcase or larger bag that fits in the overhead bin. These items must be small enough to fit the space available, though Southwest does not publish specific dimensions for carry-on bags.

Understanding these basics matters because it shapes how you pack and prepare for your flight. Many Southwest customers take full advantage of the two free checked bags by packing heavier or bringing additional items compared to flying other airlines. The policy applies to domestic flights within the United States and also to Southwest's international routes to Mexico, Central America, and the Caribbean.

Practical Takeaway: Before your next Southwest flight, confirm that your checked bags meet the 62-inch and 50-pound limits. Measure your luggage and use a scale to verify weight. This simple step prevents surprises at the airport and ensures you use the policy's full value.

Which Passengers Pay for Extra Baggage

While Southwest's two free checked bags benefit most travelers, the airline does charge for additional bags beyond this allowance. Understanding who pays and when becomes important if you're traveling with more luggage than the standard two bags.

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A third checked bag costs $45 for domestic flights and $50 for international flights. A fourth checked bag costs $100 domestically and $150 internationally. Any bags beyond the fourth checked bag are not permitted. This structure means a passenger traveling with four bags domestically would pay $145 in baggage fees ($45 plus $100).

Certain passengers receive exemptions or extended allowances that differ from the standard policy. Elite frequent flyer members in Southwest's Rapid Rewards program may receive additional free checked bags as part of their membership status. A-List members receive three free checked bags, while A-List Preferred members receive four free checked bags. These expanded allowances reward passengers who fly Southwest frequently.

Military personnel on active duty receive special consideration. Active duty military members get three free checked bags when they present military identification. This policy recognizes that military travelers often have different packing needs due to deployment or assignment changes.

Southwest Airline credit card holders receive some baggage benefits, but these vary by card type. The Southwest Rapid Rewards credit card provides one free checked bag on flights where the cardholder is also the ticket purchaser. This benefit applies to the cardholder only, not to travel companions. The upgraded card versions offer the same first checked bag benefit.

Infants or children traveling without their own seat (lap children) do not receive a baggage allowance. Parents traveling with lap children must use the baggage allowance for the adult passengers on the reservation.

Practical Takeaway: Count your bags before heading to the airport. If you're bringing more than two checked bags, calculate the baggage fees in advance. Check your frequent flyer status or credit card benefits to see if you might have additional free bags included.

Baggage Size, Weight, and Measurement Standards

Knowing the exact dimensions and weight limits for your bags prevents costly fees and delays at the airport. Southwest enforces these standards consistently, and oversized or overweight bags result in additional charges.

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For checked baggage, the maximum dimensions are calculated by adding length plus width plus height. This total cannot exceed 62 inches. For example, a bag measuring 28 inches long, 18 inches wide, and 15 inches tall would total 61 inches and meet requirements. A bag measuring 30 inches long, 20 inches wide, and 15 inches tall would total 65 inches and exceed limits. The 50-pound weight limit applies strictly, and bags heavier than this amount cannot be checked without paying an additional fee.

Overweight bags incur additional charges. A bag weighing between 51 and 100 pounds costs an extra $25 per bag. Bags exceeding 100 pounds cannot be transported on Southwest flights at all. This weight restriction exists for safety reasons and to protect baggage handlers from injury.

Unusual shaped items require special attention. Golf clubs, ski equipment, surfboards, and musical instruments may have specific handling requirements. Golf club bags are permitted as checked baggage but count toward your checked bag allowance. The same applies to ski equipment. These items must still meet the overall size limits of 62 inches and 50 pounds when possible.

Measuring your bag correctly prevents disputes at the airport. Use a soft measuring tape rather than a rigid ruler, as this accounts for the natural shape of the bag. Measure at the widest point of each dimension. If your bag is borderline, leave room for error by aiming for 60 inches total rather than exactly 62.

Weighing bags at home ensures accuracy. Most grocery stores, post offices, or shipping centers have scales available. Some pharmacies also offer free scale access. Knowing your bag's weight before arriving at the airport gives you time to repack if needed.

Practical Takeaway: Invest in a small luggage scale for your home. Before each trip, measure your bags using a soft measuring tape and weigh them on your scale. This takes 10 minutes and eliminates guesswork at the airport.

Special Items and Specific Baggage Scenarios

Beyond standard suitcases, travelers often transport specialty items that have unique baggage rules. Understanding how Southwest handles these items helps you plan your packing strategy.

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Sports equipment receives variable treatment depending on the type. Golf clubs are permitted as a checked bag, and they count as one of your two free checked bags. However, you may also bring golf clubs as an additional item beyond your standard baggage allowance. This means a golfer traveling with their clubs, a regular suitcase, and another checked bag uses only two of the free baggage allowances. Ski equipment, snowboards, and surfboards follow similar rules—they may be checked as part of your standard two free bags or brought in addition to them, depending on your packing arrangement.

Musical instruments require careful handling. Guitars, violins, keyboards, and similar instruments may be brought into the cabin if they fit in the overhead bin or under the seat. This allows musicians to keep their instruments with them rather than checking them. Larger instruments that cannot fit in the cabin must be checked as baggage and count toward your baggage allowance. Hard cases are recommended for checked instruments to provide protection.

Fragile items and valuables should generally be packed in checked baggage carefully or carried in your personal item. Southwest recommends against packing items like jewelry, electronics, important documents, or medications in checked bags. Keeping these items with you prevents loss and damage. If you must check fragile items, use plenty of padding and consider purchasing baggage protection insurance through a third party.

Hazardous materials are prohibited from both checked and carry-on luggage. This includes flammable liquids, compressed gases, explosives, and certain batteries. Some items that people don't realize are restricted include certain types of lighters, large quantities of alcohol, and lithium ion batteries above specified capacities. Before packing anything questionable, check Southwest's hazmat policy or contact the airline.

Perishable items like food require planning. Frozen or refrigerated items may be transported if they are completely frozen solid when packed and kept in an insulated container with additional ice. However, if the items thaw during transport, they may not be permitted. Fresh fruits and vegetables are generally permitted in checked baggage.

Mobility devices, wheelchairs, and crutches are transported separately from your standard baggage allowance at no charge. These items do not count