You can check your flight terminal by looking at your digital booking confirmation email or the airline's official app under "My Trips." Most airlines assign a terminal at the time of booking, but it is officially confirmed when you check in 24 hours before the flight. Additionally, searching your flight number (e.g., "BA123") on Google usually brings up a live status card showing the departure and arrival terminals. If you are already at the airport, the large "Departures" flight information screens (FIDS) will list your flight along with the specific terminal and gate number. It’s important to check this on the day of travel, as terminals can change due to operational needs.