Does the prohibition on post-purchase price increases in section 399.88(a) apply in the situation where a carrier mistakenly offers an airfare due to a computer problem or human error and a consumer purchases the ticket at that fare before the carrier is able to fix the mistake?

Section 399.88(a) states that it is an unfair and deceptive practice for any seller of scheduled air transportation within, to, or from the United States, or of a tour or tour component that includes scheduled air transportation within, to, or from the United States, to increase the price of that air transportation to a consumer after the air transportation has been purchased by the consumer, except in the case of a government-imposed tax or fee and only if the passenger is advised of a possible increase before purchasing a ticket. A purchase occurs when the full amount agreed upon has been paid by the consumer. Therefore, if a consumer purchases a fare and that consumer receives confirmation (such as a confirmation email and/or the purchase appears on their credit card statement or online account summary) of their purchase, then the seller of air transportation cannot increase the price of that air transportation to that consumer, even when the fare is a “mistake.”