 Customers logged over 61,000 complaints against U.S. Airlines in 2023, well above the previous record of about 47,000 filed the previous year. Complaints increased by almost 29%, even though the number of passengers increased by less than half that amount. The standout for complaints was Frontier, with a complaint ratio more than double the airline with the next highest. Spirit Airlines and JetBlue came in second and third. Alaska Airlines logged the lowest number of complaints. It's about eight minutes now in front of the hour.