If you are curious about What Airlines Use Boeing 737 Max, several major carriers worldwide operate this modern, fuel-efficient aircraft. In the United States, Southwest Airlines and American Airlines have added the 737 MAX to their fleets for domestic and near-international flights. In Europe, Norwegian Air Shuttle flies the 737 MAX extensively, while in Asia, Lion Air and Malindo Air use it on busy regional routes. These airlines rely on the 737 MAX for its advanced engines, improved aerodynamics, and comfortable cabin design, making it a popular choice for short- to medium-haul operations globally.