Gate card: Frontier Airlines (F9)

The airline's policy: “Customer of Size”

Frontier asks customers who cannot fully lower both armrests, or who require space from a neighboring seat or the aisle, to book two seats before traveling. The armrest is treated as the definitive boundary between seats and a safety device limiting side-to-side movement. The Contract of Carriage makes it mandatory: in Frontier's sole judgment such a passenger 'will be required to purchase a ticket for an additional seat (or more, if required) at the price then applicable.' If sufficient contiguous seats are unavailable, the passenger may switch to a flight that has them (fees apply) or receive a refund to the original form of payment.

Refunds: Extra seats follow Frontier's standard refund/Change & Cancellation policy - there are no special or separate refund rules and no automatic refund of the second seat after travel. Exception in the Contract of Carriage: if sufficient contiguous seats are not available, the passenger may opt for a refund to the original form of payment.