Southwest's free same-day flight changes carry a hidden cost for passengers who purchase seats separately. Making changes through airport agents locks in those seat purchases as nonrefundable, while using the airline's app, website, or phone preserves the payment or triggers a refund depending on the replacement seat's price.
The trap affects Choice, Choice Preferred, Choice Extra, and Getaways by Southwest fares. Basic economy passengers must upgrade their fare first to qualify, and the change must occur at least 10 minutes before the original scheduled departure.
A September traveler discovered this the hard way after purchasing approximately $230 in seats for two passengers. Following a medical emergency requiring a cancellation and rebook, the passenger expected the seat credits to fund new seat upgrades. Instead, Southwest converted the credits to airfare-only credit, usable only for tickets rather than additional seat purchases.
Standby flights operate under different rules. Paid seats become nonrefundable once standby clears, even when booked through the app. Elite members holding Basic fares can access standby despite being ineligible for free confirmed same-day changes.
When Southwest downgrades passengers to lower seat categories, it refunds separately purchased seats to the original payment method. Exchanging two paid connecting seats for a nonstop flight triggers automatic refunds only on the replacement seat if it costs more than one original. Passengers must manually request refunds for the second seat.