America’s ultra‑low‑cost carriers hit a business‑model breaking point

Four major U.S. low‑cost carriers — Spirit, Frontier, Allegiant and Sun Country — reported negative operating margins in three recent years, signaling structural profitability issues across the ULCC segment. See how discounters have retrenched and adjusted networks in response (source:e15b68bc-0684-469c-b4ca-ae211992fada).

The weakness is already prompting restructurings, fleet and capacity reductions and renewed merger talks that will compress seat supply and alter competitive dynamics and fares on affected routes (see Spirit/Frontier merger talks and fleet moves) (source:29746f99-dfe6-4893-84f2-fd393574a929; source:d7ef432d-380e-4e17-b484-a7c83c56a011).