Southwest Airlines, long known for its open-seating policy and free checked baggage, is rolling out some of the most sweeping changes in its history. From 27 January 2026, the carrier will require plus-size passengers who cannot fit comfortably within the boundaries of a single seat to purchase an additional one in advance. The move comes as the airline abandons its trademark free-for-all boarding system in favour of assigned seating.
The new policy has sparked debate about fairness, comfort and the financial burden placed on travellers who already face stigma in the aviation industry. While Southwest insists the change is designed to “ensure all Customers onboard have access to safe and comfortable seating”, critics argue it risks alienating a loyal customer base and making air travel less inclusive.
A major shift in policy
Until now, Southwest’s “Customer of Size” policy has been considered one of the more accommodating in the industry. Passengers who needed an extra seat could either purchase one at the time of booking and later request a refund, or ask for a complimentary additional seat at the airport if space was available. The armrest was considered the defining boundary between seats, and the arrangement often allowed plus-size passengers to travel without paying twice for the same journey.
That flexibility is ending. Under the new rules, anyone requiring extra space must purchase an additional ticket at the time of booking. Refunds will still be possible, but they will only be granted if the flight departs with at least one empty seat and if both tickets were purchased in the same fare class. Refund requests must be submitted within 90 days of travel.
Those who fail to book in advance will be required to buy an additional seat at the airport. If the flight is sold out, passengers will be rebooked onto a later service. In the event that the need for a second seat is identified after boarding, travellers may even be asked to deplane so their reservation can be updated. Southwest itself warns against this scenario by urging customers to book in advance.
Why Southwest is changing course
The decision coincides with broader structural changes at the airline. Once famous for differentiating itself with perks such as free checked bags and unassigned seating, Southwest has been moving steadily towards industry norms. Earlier this year, it announced the end of free checked baggage, while extra charges for more legroom and new overnight “red-eye” services are also being introduced.
Industry analysts suggest the changes are being driven by investor pressure. The airline has struggled financially in recent years, and activist shareholders have called for higher revenues and stronger margins. For plus-size travellers, that financial reality translates into a new cost burden, as what was once a complimentary accommodation now becomes a purchase with only conditional reimbursement.
Reactions from the plus-size community
The backlash from advocates and frequent flyers has been swift. Jason Vaughn, an Orlando-based travel agent who runs the website Fat Travel Tested, told US media that the change would make the flying experience worse for everyone, not just plus-size travellers. “Southwest’s current policy helped create a more comfortable flying experience for plus-size travellers,” he said. “This change feels like another step away from who they used to be.”
Vaughn compared the move to other controversial brand decisions that have left loyal customers feeling abandoned. “They have no idea anymore who their customer is,” he said. “They have no identity left.”
On social media, many plus-size travellers echoed that sentiment, expressing concern not only about the financial burden but also about the humiliation of potentially being rebooked or deplaned if they did not purchase in advance.
@dailymail This plus-sized TikToker demands better plane seats, so she's set up a gofundme. 🎥 @jaebaeofficial #travel#plane#holiday#vacation #plussizefashion ♬ original sound – Daily Mail
What Southwest says
On its official website, Southwest maintains that the policy is designed with both safety and comfort in mind:
“The purchase of additional seats serves as a notification of a special seating request and helps us ensure we can accommodate you on the flight. Most importantly, it ensures that all Customers onboard have access to safe and comfortable seating.”
The airline stresses that refunds remain possible in specific circumstances, but it has drawn a clear line: passengers may not buy extra seats solely to keep the adjoining space empty.
The wider debate about plus-size travellers and aviation
Southwest’s decision is not occurring in isolation. Airlines around the world are struggling to reconcile commercial pressures with the realities of passenger diversity. Travel Tomorrow has reported on a series of recent initiatives that illustrate how contentious the issue has become.
In 2023, Air New Zealand made headlines when it began weighing passengers before boarding on selected flights, arguing the move was necessary to collect data for aircraft safety and to cut carbon emissions. The following year, Bangkok Airways introduced a similar practice, asking travellers to step on the scales at check-in counters. And in early 2024, Finnair became the latest airline to weigh passengers at the gate, describing the exercise as part of a voluntary data-gathering programme.
While airlines justify such measures as technical requirements linked to fuel efficiency and safety, they have fuelled debate about privacy, dignity and discrimination. For plus-size passengers in particular, the prospect of being publicly weighed before boarding has raised concerns about stigma and exclusion.
