No—not under Southwest’s current policy. Since a May 2026 revision, airport agents may provide an adjacent seat at no extra cost when one is available. If you wait until the airport and no seat is available, Southwest says it will work to accommodate you on a later flight. Buying an extra seat in advance remains the more predictable option, but a refund is not guaranteed.
What Southwest’s extra-seat policy says now
Southwest’s current approach is conditional, not a requirement that every passenger who needs more room buy a second seat before travel. At the airport, an agent may provide an adjacent seat at no cost if one is available. If it is not, Southwest says it will work to accommodate the traveler on a later flight. ABC News reported the change on May 28, 2026.
Southwest still encourages customers who need an additional seat to book it in advance. That may reduce the uncertainty of waiting for airport availability, but it means paying for the extra seat upfront and does not ensure you will receive a refund.
Why older reports say passengers must buy a seat
The policy changed twice in 2026. On January 27, Southwest began requiring customers who could not fit within a single seat’s armrests to purchase a second seat in advance. That rule replaced an earlier airport option. In late May, the airline revised the approach again, restoring the possibility of a complimentary adjacent seat when available. The Associated Press described the planned January rule in August 2025; that account is historical, not the current policy.
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How to choose: book ahead or ask at the airport?
| Approach | What to expect |
|---|---|
| Buy an extra seat in advance | More predictable than relying on an unassigned airport seat, and Southwest encourages this option. You pay upfront; a refund may be possible, but eligibility is conditional and should be confirmed with Southwest. |
| Ask for an adjacent seat at the airport | No extra charge if an adjacent seat is available. If one is not, Southwest says it will work to accommodate you on a later flight, so a delay or rebooking is possible. |
The Washington Post reports that travelers can book two seats and contact Southwest to reserve neighboring seats. It also reports that a refund for the additional seat depends, among other conditions, on the flight departing with at least one open seat. Because the detailed official refund terms could not be confirmed from readable policy text, check Southwest’s current rules and request process before counting on reimbursement.
What counts as needing another seat?
The practical test described in reporting is whether a passenger can comfortably fit between the seat’s armrests. The sources reviewed do not identify a weight limit or specific body-measurement threshold. If you are unsure how Southwest will handle your situation, contact the airline before travel rather than relying on a numerical cutoff.
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Partner flights and seatbelt extensions
If your itinerary includes a partner airline, do not assume Southwest’s accommodation or refund policy applies to that carrier. Southwest’s policy information says passengers must contact the partner airline directly to purchase an additional seat. Confirm the partner’s rules with that airline.
Southwest’s policy information also says that only a seatbelt extension provided by Southwest is approved for onboard use. Do not rely on a third-party extender as a workaround. Check Southwest’s current extra-seat policy for the applicable details.
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