London Heathrow (EGLL) is by far the busiest airport every day on the training server, and is absolutely packed even when there are events on the expert server.
In an effort to increase realism, I just wanted to point out a few things about this amazing airport.
Terminal 2 (The Queen’s terminal) at Heathrow is devoted to all Star Alliance members (eg. Singapore Airlines, United, Swiss, Thai, Air New Zealand). If you’re flying with one of these liveries, please attempt to park only here.
Terminal 3 at Heathrow is meant for all but two members of the Oneworld Alliance (eg. Cathay Pacific, Qantas) and is also the only base for Virgin Atlantic. Only a few British Airways flights depart from here (check before you fly that specific route). It is also home to non-alliance airlines, like Emirates and Philippine Airlines, and the SkyTeam members Delta and Middle East Airlines.
Terminal 4 at Heathrow is home to all but two SkyTeam alliance members (eg. Aeroflot, KLM, Saudia) as well as the OneWorld members Malaysia Airlines and Qatar Airways. It also houses Etihad Airways.
Terminal 5 at Heathrow is exclusively reserved for most British Airways flights and Iberia. There are two satellite terminals, 5B, and 5C (see chart below). They are mostly used for long haul flights with larger aircraft.
Please keep this in mind before flying so your experience and everyone else’s can be as realistic as possible. I’ve attached an airport diagram of EGLL below to help you!
Note: I’ve edited this post so more people can take note ahead of what promises to be a fabulous day at Heathrow tomorrow! Happy flying!