Why Airlines Require Airplane Mode During Flights
Passengers must enable airplane mode on phones, tablets, and laptops because active radio transmitters can emit signals across multiple frequency bands. These signals may interfere with cockpit instruments, navigation receivers, and communication systems that operate on similar radio frequencies. The Federal Aviation Administration, the European Union Aviation Safety Agency, and other regulators require devices to be in airplane mode or with cellular connections disabled during critical phases of flight. Airlines enforce this rule to minimize the risk of disruption to sensitive avionics and to ensure consistent compliance across all devices on board. The International Air Transport Association tracks cabin compliance and notes that most major carriers now allow limited use of devices in airplane mode above certain altitudes.
Regulatory guidance from the FAA and EASA is based on laboratory and in-flight testing that measured potential electromagnetic interference with aircraft systems. The FAA states that radio frequency emissions from personal electronic devices can affect communication and navigation equipment, especially during low-visibility approaches and instrument landings. Airlines integrate these findings into their operations manuals and crew training programs. Compliance is monitored through cabin announcements, safety cards, and crew enforcement during takeoff and landing. The policy is not limited to a single manufacturer or aircraft type but applies across fleets operated by carriers worldwide.
How Wireless Signals Affect Aircraft Systems and Networks
Cellular, Wi-Fi, and Bluetooth signals from active devices can create electromagnetic noise that overlaps with frequencies used by aircraft communication and navigation systems. In 2024, the Federal Communications Commission and the FAA continued to coordinate rules on in-flight device use to address interference risks with ground-based cellular networks and onboard systems. Multiple studies have shown that large numbers of devices transmitting simultaneously can increase the potential for signal conflicts in the cockpit and on the ground. Airlines and regulators cite these findings when explaining why airplane mode remains mandatory during takeoff and landing.
Ground-based networks can also be affected when devices at cruising altitude connect to multiple cell towers simultaneously, a phenomenon known as cell tower overload. The CTIA and wireless industry groups have reported that fast-moving devices at high altitude can cause signaling disruptions on terrestrial networks if airplane mode is not enabled. This is why airlines and regulators require devices to be in airplane mode or to disable cellular functions during flight. The policy helps maintain reliable ground network performance and reduces the risk of dropped calls or data errors for users on the ground.
What Passengers Can Use and When During a Flight
Most airlines now permit the use of devices in airplane mode throughout the flight, including during cruise, while still prohibiting cellular voice and data connections. In-flight Wi-Fi services, offered by providers such as Gogo and Viasat, allow passengers to connect to the internet using satellite or air-to-ground networks while devices remain in airplane mode. Airlines publish their specific policies in onboard safety materials and on their websites, noting that certain devices may need to be stowed during takeoff and landing even in airplane mode. Passengers are advised to follow crew instructions and to verify the current policy of their carrier before flying.
Regulators such as the FAA and EASA continue to update guidance as new device technologies and aircraft systems are introduced. The expansion of in-flight connectivity services has led to clearer rules about which wireless functions are allowed and when. Airlines and device manufacturers collaborate on testing to ensure that modern devices do not interfere with critical systems when used in airplane mode. Travelers can find the latest guidance on airline websites and through official regulatory channels to ensure compliance before departure.