Some airlines do not use Boeing aircraft and instead operate fleets made entirely of planes from other manufacturers, mainly Airbus. For example, airlines like Wizz Air, EasyJet, and Spirit Airlines rely solely on Airbus models such as the A320 and A321. These airlines choose to stick with one aircraft type to simplify operations, reduce maintenance costs, and streamline pilot training. So, if you're wondering What Airlines Do Not Use Boeing these carriers are strong examples of Airbus-only fleets.