Heathrow's Terminal 4 is a bustling hub for many of the world's leading airlines, particularly those belonging to the SkyTeam Alliance. Passengers travelling from this terminal can expect to find a wide array of international carriers, offering flights to destinations across Europe, North America, Asia, and the Middle East. Key airlines operating out of Terminal 4 include Qatar Airways, Etihad Airways, Air France, KLM, and Delta Air Lines, providing a gateway to a diverse network of global connections.