Southwest says the policy isn’t focused on just
weight, but applies to anyone who doesn’t fit in the seat because of their body type. The space is determined by the placement of armrests.
“The armrest is considered to be the definitive boundary between seats,” the policy says. “If you’re unable to lower both armrests and/or encroach upon any portion of a seat next to you, you need a second seat. Our policy does not focus on weight.”
“The purchase of additional seats serves as a notification of a special seating need and allows us to adequately plan for the number of occupied seats onboard,” the policy continues. “It also helps us ensure we can accommodate all customers on the flight for which they purchased a ticket and avoid asking customers to relinquish their seats for unplanned accommodation.”
A TikTok influencer named Kimmy Garris, who calls herself a “fat solo traveler,” posted a video of herself boarding a Southwest plane in October and asking about their policy for overweight passengers. The customer service agent can be seen giving Garris an extra ticket, which the TikTok user said “should be the industry norm.”