One free carry-on is included on all fares

There are checked bag fees on all fares except Business Select (two bags).  A-List Preferred members and those with a Southwest Rapid Rewards credit card can check one bag for free

All fares are cancellable without a fee

Changes allowed except on the Basic Fare

The Basic Fare will be similar to Basic Economy fares on other airlines

No changes allowed

Cancellable with credit good for six months

No name changes on credits

See chart with the features of each fare type

See full details

See assigned seating changes coming in the second half of 2025 for 2026 travel

On January 13, 2025 the Transportation Security Administration (TSA) published a final rule confirming the start date for enforcement of Real ID driver’s licenses and state identification cards to board commercial airline flights will be May 7, 2025. This applies to domestic flights.  A passport will still be required for international flights. A U.S. passport can be used in place of a Real ID on domestic flights. 

For more information, go to the Real ID web pages of the State of Michigan and the Dept of Homeland Security

Starting January 8, 2025, United States citizens (and citizens of 50 other countries/territories) that are traveling to the United Kingdom are required to have an Electronic Travel Authorization unless they have a visa.
More information is available at https://www.gvsu.edu/purchasing/important-announcement-for-travelers-to-the-united-kingdom-250.htm