Abstract: A method for planning a multi-leg trip involves obtaining, in a graphical user interface, trip data including a departure location, a departure airport, a destination airport, and a desired departure time; selecting a first ground leg of the multi-leg trip, the first ground leg connecting the departure location to the departure airport; obtaining a first estimated arrival time at the departure airport based on the desired departure time and the first ground leg; selecting a flight leg of the multi-leg trip, the flight leg connecting the departure airport and the destination airport. The method also involves obtaining a second estimated arrival time at the destination airport based on: the first estimated arrival time, an aircraft to be used for the flight leg, and a prevailing flight condition associated with the second flight leg; and presenting, in the graphical user interface, the second estimated arrival time.