Southwest Airlines and others operate all-Boeing fleets

Some airlines exclusively operate Boeing aircraft, mainly focusing on the Boeing 737. Low-cost carriers like Southwest Airlines and Jeju Air are notable examples, with Southwest being the largest operator of the 737 family. Other airlines, including Air Europa and EL AL, also maintain all-Boeing fleets but utilize a mix of aircraft types, such as the 787 and 777. This strategy helps them serve various routes effectively. Despite the benefits of an all-Boeing fleet, airlines face risks due to Boeing's recent quality control issues and delivery delays. This reliance on a single supplier can complicate operations and increase vulnerability to supply chain disruptions.