Month: December 2025

As I sit on the plane, I ponder how airlines separate excessively obese people from those not obese enough, and how they make the former pay twice as much. And how does this align with the policy of universal equality and equal opportunities? The issue causes “anthropometric dissonance” – over the past decades, the average airplane seat width has narrowed from 47 to 43 cm, while the average passenger weight has significantly increased. As a result, there emerges a rigid classification of passengers into “regular” and officially recognized “Customers of Size” (CoS).

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The main technical criterion separating these categories is the “armrest rule.” If a person’s body extends beyond the outer boundary of the lowered armrest by more than 1 inch (2.5 cm), they are officially recognized as “oversized.” The inability to fully lower the armrest without pain or discomfort to oneself or a neighbor is grounds for requiring the purchase of a second seat.

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Until 2025, Southwest Airlines was considered the “gold standard” for large individuals, allowing them to occupy a second seat for free. However, as of January 27, 2025, the rules changed: such passengers are now required to purchase a second seat in advance when booking. If an individual fails to do this and the flight is full, they may simply be denied boarding and offered to rebook to another flight where two adjacent seats are available.

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The financial risks now almost entirely fall on the passenger. According to the new 2025 policy, a refund for an additionally purchased seat is only possible if the flight departs not fully booked. Considering that the average aircraft occupancy today is 85–90%, the likelihood that money paid for a “comfort seat” will not be refunded is extremely high.

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There exists a “geographical lottery” of passenger rights in the world. In Canada, a unique doctrine of “One Person, One Fare” (1P1F) is affirmed by court. There, obesity is recognized as a “functional disability,” therefore, airlines are required to provide a second seat for free on domestic flights if the passenger presents a medical certificate. In the USA and Europe, no such benefits exist, and comfort is considered a commercial service.

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Technically, there is also a “seatbelt rule,” which is the second most important (after the armrest rule) and serves as a kind of “legal and technical barrier.” Specifically, every passenger must be buckled during taxi, takeoff, and landing. If the belt does not fasten, the passenger physically cannot be seated. This isn’t a matter of comfort, but a question of legality aboard the aircraft. If the standard length of the belt is insufficient, the passenger has the right to request a seatbelt extender, which usually adds between 25 to 60 centimeters. The mere request for an extender often gets recorded by flight attendants as a marker of an “increased size passenger.” This is a critical moment. Most airlines globally explicitly forbid the use of two extenders simultaneously. If the length of one standard belt plus one extender is not enough, the passenger is recognized as “oversized” for that seat type. In this case, the airline has the full right to remove them from the flight or demand the purchase of a second seat, as safety cannot be ensured.

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Airlines’ main argument for imposing limitations is flight safety. According to EASA and FAA standards, a full airplane evacuation must take no more than 90 seconds. A large passenger, who physically does not fit in the seat, can block the aisle or slow the movement of others in an emergency, therefore they are prohibited from occupying seats near emergency exits. Personally, I think this is just a nice reason to avoid spending extra money.

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Identifying “too fat” passengers often happens right in the cabin. Flight attendants have the right to demand that a person undergo an “armrest test” in front of witnesses. If an “encroachment” into a neighbor’s space is discovered, priority is always given to those who fit in their own seat, and the CoS passenger may be removed from the flight for the comfort of others.