The Fly LegsUp flight hammock is a popular comfort device, but its acceptance varies significantly by airline and cabin crew discretion. Airlines that are generally recognized as "comfort-friendly" and frequently permit such devices (as long as they are used in window seats and not during taxi, takeoff, or landing) include Singapore Airlines, Virgin Atlantic, Air Canada, Lufthansa, and Cathay Pacific. Other major carriers that often allow them include Southwest, Alaska Airlines, and TUI. However, many airlines have strict bans on anything that attaches to the seat structure or could impede emergency egress; for example, Emirates, United, and Qantas are known for having more restrictive policies regarding foot hammocks and inflatable cushions. In 2026, the manufacturer maintains a "Recommended Airline List," but they explicitly state that the final decision always rests with the cabin crew on the day of the flight. To avoid disappointment, it is best to use these only in non-exit row window seats where the device does not block access to the aisle for other passengers.