Heathrow was the busiest (19.4 million), followed by Stansted (7.1 million), Gatwick (6.3 million) and Manchester (6.1 million).
Heathrow oedd brysuraf (19.4 miliwn), yna Standsted (7.1 miliwn), Gatwick (6.3 miliwn), a Manceinion (6.1 miliwn).