Southwest Airlines Alters Second Seat Policy Ahead of 2026 Seating Change

Southwest Airlines has announced a significant revision to its 'Customer of Size' policy, which will take effect on January 27, 2026. The updated policy requires passengers who are unable to lower both armrests and fit into a single seat to purchase a second seat in advance of travel. This change marks a departure from the carrier's long-standing, more flexible approach and aligns its rules more closely with other major U.S. airlines.

The new mandate is part of a broader operational overhaul at Southwest, coinciding with its transition from a unique open-seating model to a system of assigned seating on the same date. The financial impact on passengers is notable, as the refund for the second seat is no longer guaranteed. Previously, the airline often provided complimentary extra seats at the gate or refunded the cost of a second seat even on full flights.

New Policy Details and Conditions

Under the revised rules, passengers requiring additional space must purchase the extra seat during the booking process. According to the Southwest Airlines Help Center, a refund for this second seat can be requested after travel is completed, but it is contingent upon the flight having departed with at least one unsold seat. This condition introduces uncertainty for passengers, as the availability of a refund depends on the flight's load factor, which is not known at the time of booking.

Several other conditions apply to the refund process. To be eligible, both seats must have been purchased in the same fare class, and the request must be submitted to the airline within 90 days of the travel date. A Southwest Airlines spokesperson stated, "We are updating many policies as we prepare our operation, employees, and customers for assigned seating on January 27, 2026. To ensure space, we are communicating to customers who have previously used the extra-seat policy they should purchase it at booking."

Industry Alignment and Regulatory Context

The policy revision positions Southwest Airlines more in line with competitors. Other major U.S. carriers, including American and United, have long required the purchase of a second seat without a guaranteed refund. Alaska Airlines is one of the few other major carriers that offers a potential refund, but its policy is similarly conditional on the flight not being sold out. This shift effectively ends Southwest's status as an outlier with one of the most accommodative policies for plus-size travelers in the industry.

This change occurs within a regulatory environment that lacks specific federal mandates for seat dimensions. The FAA (Federal Aviation Administration) does not currently regulate minimum airline seat width or pitch, despite language in the 2018 FAA Reauthorization Act directing it to study the issue. The agency's primary focus regarding cabin configuration remains on safety, specifically the requirement that an aircraft can be fully evacuated in 90 seconds. Meanwhile, consumer advocates point to a trend of shrinking average seat sizes over recent decades, with seat pitch reportedly decreasing from around 32 inches to as low as 28 inches.

Passenger Impact and Advocacy

The policy change has drawn criticism from passenger advocacy groups. The previous policy was seen as a key feature for accessibility and dignity. Tigress Osborn, the executive director of the National Association to Advance Fat Acceptance, told The New York Times, "Southwest was the only beacon of hope for many fat people." The U.S. Department of Transportation (DOT) enforces the Air Carrier Access Act (ACAA), which prohibits discrimination based on disability, but its application to passenger size is not explicitly defined, leaving policies largely to individual airlines. Passenger and consumer rights groups continue to petition the FAA and DOT for standardized rules on seat dimensions and clear policies for customers of size across the entire industry.

Why This Matters

This policy update represents a significant operational and cultural shift for Southwest Airlines, moving it away from a well-known customer service differentiator toward industry-standard ancillary revenue practices. For passengers, the change introduces financial uncertainty and removes a valued accommodation, potentially impacting travel decisions. For the broader aviation sector, it underscores the ongoing tension between operational efficiency, revenue generation, and passenger accessibility, likely intensifying calls for federal regulators to establish clear standards for cabin seating.

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