Southwest Airlines Introduces Stricter Policy for Plus-Size Passengers with Launch of Assigned Seating

Starting January 27, 2026, Southwest Airlines will require passengers who need extra space due to size to purchase additional seats when booking, ending its long-standing "Customer of Size" approach. This change coincides with the airline's historic shift to assigned seating, marking a major departure from its traditional open-seating policy.

Previously, passengers who did not fit within a single seats armrests could either buy an extra seat in advance or request a complimentary additional seat at the gate if space was available. Under the new rules, travelers must secure and pay for multiple seats during booking, with refunds only allowed if the flight is not fully booked, both seats were purchased together, and a request is made within 90 days of travel. Those who arrive at the airport without purchasing the extra seat may face mandatory seat purchases or rebooking if no adjacent seats are open.

Southwests policy shift aligns its procedures with standard industry practices, similar to airlines like Alaska, which also require extra seat purchases for larger passengers but may offer refunds when space permits. Advocates for plus-size travelers warn that these stricter rules could reduce accessibility and make flying less comfortable for some passengers.

Travel experts highlight that the previous policy allowed more flexibility and comfort. Jason Vaughn, a travel agent specializing in plus-size travel, noted that Southwests former policy offered a smoother experience and adequate space for all passengers. Jeff Jenkins, founder of the plus-size travel blog Chubby Diaries, expressed concerns that uncertainty about seat availability might discourage travelers from flying with the airline.

Southwest defended the changes as part of its broader operational updates, including the introduction of assigned seating and new checked bag fees of $35 for the first bag and $45 for the second, ending the "Bags Fly Free" model. The airline emphasizes that passengers who book extra seats before the new policy takes effect should see a gate agent to obtain documentation confirming the reserved adjacent seat.

These adjustments are part of Southwests largest operational transformation in its 54-year history, signaling a significant shift in its domestic market strategy and departure from policies that have long defined its customer experience.

Author: Zoe Harrison