Singh, Jay2021-05-192021-05-192021-05-17http://hdl.handle.net/10919/103364The ultra-low-cost carriers are compared here to determine how they each performed for the first quarter of 2021. The airlines are hoping for a more profitable quarter this summer. The four major ULCC's of Spirit, Frontier, Sun Country, and Allegiant sell unbundles fares and outfit their aircraft with a single-class configuration. The nature of the unbundles fare allows for these airlines to have other revenue streams which come from their ancillary fees for baggage, seat selection, or flight flexibility.application/pdfenIn Copyright (InC)Spirit AirlinesFrontier AirlinesSun Country AirlinesAllegiant AirNet financial resultsFleet sizeCapacityLoad factorCASMBase fare per customerAncillary fares per passengerArticlehttps://simpleflying.com/us-ulcc-first-quarter-2021/