Learn About Southwest Baggage Fee Policies

Overview of Southwest Airlines Baggage Policies

Southwest Airlines has built its business model around offering low fares with what many travelers consider customer-friendly baggage rules. Unlike most major U.S. carriers, Southwest allows passengers to check two bags at no additional charge on most fare types. This policy has remained relatively consistent for decades, though understanding the details can help you plan your trip more effectively.

The airline's baggage allowance applies to standard checked bags, carry-on bags, and personal items. Southwest operates flights to over 120 destinations across the United States, Mexico, Central America, and the Caribbean, so these policies affect millions of travelers annually. The baggage rules differ slightly depending on your ticket type, frequent flyer status, and the route you're traveling.

Southwest's approach differs significantly from competitors like American Airlines, Delta, and United, which typically charge $30 to $35 for the first checked bag. This structural difference means Southwest passengers can often save money on trips where checked luggage is necessary. However, the airline has specific size and weight restrictions that all passengers must follow, regardless of ticket type.

The airline also offers different service levels including Wanna Get Away (basic economy), Wanna Get Away Plus, Anytime, and Business Select fares. Each tier comes with different perks beyond baggage, such as boarding position and refund policies. Understanding where your ticket falls within this structure helps determine exactly what baggage allowances apply to your specific booking.

Practical Takeaway: Before booking a Southwest flight, review your specific fare type to understand which baggage allowances apply. While the airline's first two checked bags are typically free, confirming this detail ensures you understand the full cost of your trip and can plan your packing accordingly.

Checked Baggage Allowances and Fees

Southwest's checked baggage policy is one of its most advertised features. The airline permits two free checked bags for virtually all passengers, regardless of fare class. This means your first bag and second bag fly at no additional charge. This policy applies to standard leisure travelers, business passengers, and frequent flyers on most ticket types.

Each checked bag must not exceed 50 pounds and cannot be larger than 62 inches in total dimensions (length plus width plus height). Bags exceeding these limits incur overage fees. A third checked bag costs $35 on the first and second occurrences within a 7-day period, then increases to $100 for any subsequent bags during that same week. For a family of four traveling together, this structure means you could check up to eight bags free, but a ninth bag would cost $35.

Sporting equipment like golf clubs, surfboards, and bicycles generally count as a checked bag and follow the same allowances and fees. However, some specialized sports equipment may require additional fees depending on size and weight. Southwest recommends contacting the airline directly about unusual items before your flight.

Oversized bags that exceed the weight or dimension limits face fees starting at $75 for the first overage bag in a 7-day period, $100 for the second, and $150 for subsequent bags. These fees are separate from the standard checked bag fees. A bag weighing 65 pounds, for example, would incur an oversized fee in addition to counting as one of your checked bags.

Fragile items, hazardous materials, and certain prohibited items have additional rules. Musical instruments, for instance, count as a checked bag. Live animals in carriers also count as a checked bag, and the airline has specific requirements about carrier dimensions and ventilation.

Practical Takeaway: Weigh your bags before arriving at the airport and verify they fall within the 50-pound limit. If you're traveling with a third bag or specialty items, calculate the fees beforehand so there are no surprises at check-in. Keep receipts showing the weight if your bag is close to the limit.

Carry-On Baggage and Personal Item Rules

Southwest allows passengers to bring one carry-on bag and one personal item into the cabin on every flight. The carry-on bag must fit in the overhead bins and cannot exceed 24 inches in length, 16 inches in width, and 10 inches in depth. Many rolling carry-on bags marketed as "personal carry-on" or "slim" fit easily within these dimensions, though some standard rolling luggage exceeds these limits.

The personal item can be a purse, laptop bag, backpack, or small briefcase. It must fit under the seat in front of you. Southwest doesn't specify exact dimensions for personal items, instead using the "under the seat" guideline. This provides some flexibility for oddly-shaped items as long as they physically fit in the under-seat space. Typically, a personal item should not exceed 18 inches by 14 inches by 8 inches to ensure it fits comfortably.

Unlike checked baggage, carry-on items have no weight restrictions on Southwest flights. This means you could theoretically bring a very heavy laptop bag or backpack as a personal item without incurring fees, as long as it fits under the seat. However, you must be able to place it yourself, and flight attendants may ask you to move items that block the aisle or emergency exits.

If you arrive at the gate with a carry-on bag that doesn't fit the size restrictions, Southwest agents may request that you check it at the gate. This is called "gate checking" and, while it happens more frequently during busy travel periods, it doesn't cost anything. Your bag will be placed in the cargo hold and retrieved at baggage claim after you land. Gate checking can be frustrating if you packed items you wanted easy access to, so measuring your bag beforehand helps prevent this situation.

Passengers traveling on Business Select fares receive priority boarding, which means they board earlier and have first access to overhead bin space. This reduces the likelihood of needing to gate-check a carry-on bag. Standard passengers board in groups, and by group C, overhead bins may be full.

Practical Takeaway: Measure your carry-on bag using a tape measure or a carry-on sizer (available at most airport stores) to confirm it meets Southwest's 24" x 16" x 10" dimension limits. Consider purchasing a small carry-on bag designed specifically for airline use if your current bag is oversized. Packing your most important items in your personal item, not your carry-on, ensures you have access to them throughout the flight.

Special Circumstances and Exceptions

Southwest offers exceptions to standard baggage policies in specific situations. Military personnel traveling on leave or on official military business may have different baggage allowances. Active duty military, reserves, and National Guard members should contact Southwest directly to understand any special provisions, as benefits can vary based on the nature of military travel.

Passengers traveling with infants (under 2 years old) who haven't purchased a seat can bring a car seat and a stroller free of charge, in addition to their standard baggage allowance. The car seat and stroller are typically checked free at the gate. If an infant has a purchased seat, these items count toward standard baggage allowances unless they're checking items that fold compactly.

Passengers with disabilities may be able to bring medical equipment at no charge. Wheelchairs, walkers, canes, and other mobility devices don't count against baggage limits. However, specific policies for medical equipment vary, and Southwest recommends calling the airline's special assistance team in advance to discuss your particular needs and equipment. Prescription medications and medical supplies also have special handling procedures.

Service animals (dogs and miniature horses trained to perform specific tasks) fly free and don't count as a passenger or baggage item. Emotional support animals, by contrast, are considered pets and may be subject to pet fees, which Southwest charges at $100 for most flights. Documentation requirements for service animals changed in 2021, and the airline now requires specific Department of Transportation forms if traveling with a service animal.

Standby passengers—those booked on a different flight or flying standby on a revenue ticket—follow the same baggage policies as regularly scheduled passengers. If you miss your flight or need to change flights, your baggage allowances don't change based on standby status.

Practical Takeaway: If you have a disability, are traveling with an infant, or are military personnel, contact Southwest's special services team before your flight to discuss any special baggage allowances. Keep documentation of any military status or disability accommodations readily available when you check in.