Southwest Airlines Will Soon Charge Plus-Sized Passengers More for Extra Seats

The airline’s once-popular “Customer of Size” policy is getting stricter.

Southwest Airlines is rolling out a big change that could impact plus-sized travelers who need more than one seat.

Starting January 27, 2026, travelers who encroach on a neighboring seat will need to buy an additional ticket in advance. Refunds for that second seat won’t be automatic anymore; they’ll only be given if the flight departs with at least one open seat, both seats were purchased in the same fare class, and the refund request is submitted within 90 days of travel.

That’s a sharp contrast with the current setup. Right now, Southwest still has open seating, and plus-sized travelers can either buy an extra seat and get it refunded later or sometimes be accommodated with a complimentary seat at the airport if the flight isn’t full. Once assigned seating takes effect, that option disappears. Show up without booking the space you need, and you’ll be asked to purchase another seat at the airport, or, if the plane is sold out, you may be rebooked on a later flight.

Southwest also notes that customers can’t buy extra seats just to keep an empty seat next to them. The airline says these changes are meant to “ensure all Customers onboard have access to safe and comfortable seating.”

This update is just one in a string of policy shifts from the carrier, which has already moved away from its signature open seating model and introduced baggage fees.

If you’re following airline changes closely, you might also want to check out the new TSA rule that could make airport security a little easier, which U.S. airlines lose the most luggage, and the surprising in-flight mistake that can now lead to a fine.

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