The majority of Gatwick flights operate out of South Terminal, including budget airlines Ryanair and easyjet, though British Airways, Emirates and other international airlines use the North Terminal. You can easily travel between the two using the free, 24-hour airport shuttle train, running every few minutes.

Gatwick Airport does not have a single "International Terminal"; instead, both the North and South Terminals handle international departures. Which one you use depends entirely on your airline. Generally, the North Terminal is the primary home for long-haul international carriers like Emirates, Qatar Airways, and WestJet, as well as the majority of easyJet flights. The South Terminal handles a large volume of European and domestic traffic but is also the international hub for British Airways, Norse Atlantic, and Ryanair. Both terminals are connected by a free, 24-hour automated shuttle train that takes about two minutes. Because many airlines split their operations or change terminals seasonally, it is essential to check your boarding pass or the live Gatwick flight boards before arriving, as the two terminals are physically separate and require different entrance points.