Yes, Bluetooth works and is officially permitted on most commercial flights in 2026. Both the FAA (US) and EASA (Europe) allow the use of short-range Bluetooth devices, such as wireless headphones, keyboards, and mice, throughout the flight. The only requirement is that your primary device (phone or tablet) must remain in "Airplane Mode" to disable cellular signals. Once Airplane Mode is active, you can manually toggle Bluetooth back "On." In 2026, modern aircraft are designed with advanced shielding that prevents Bluetooth frequencies from interfering with cockpit avionics. However, most seatback entertainment systems still use a standard 3.5mm wired jack, so you will likely need a Bluetooth transmitter (like an AirFly) or a wired adapter if you want to use your wireless headphones to watch the plane's movies. Always listen to the flight crew's initial briefing, as some older international carriers may still ask you to turn off wireless devices during the critical phases of takeoff and landing.