TAP Portugal offers online check-in starting 36 hours before departure for most flights. However, for flights to and from the United States, online check-in is available only 24 hours before departure due to government regulations. Passengers can check in via the TAP website or mobile app. During online check-in, you can select seats, add baggage, and obtain a digital boarding pass. If you have checked baggage, you must drop it off at the designated counters before the cutoff time, typically 60 minutes before departure for international flights. It's advisable to arrive at the airport early to ensure a smooth check-in process