London Heathrow (LHR) has long been the largest and busiest airport in the United Kingdom, with the facility also ranking highly among Europe's (and indeed the whole world's) leading hubs. This was recently underlined by the airport's announcement that it just experienced its busiest-ever December , resulting in 2024 also being its busiest-ever year, with 83.9 million passengers passing through its doors.
Today, Heathrow serves a huge variety of regional, short-haul, and long-haul routes, with a suitably diverse range of airlines and aircraft operating these flights. According to current scheduling data made available by Cirium , an aviation analytics company, 35,913 flights are scheduled to arrive at or depart from the facility in February 2025, offering 7,870,820 seats. But which airlines operate the most flights? 10 Delta Air Lines (USA) 530 flights It's no secret that the transatlantic market is of huge importance to London Heathrow Airport , with the aerial corridor to New York City in particular being among the most lucrative in the world .
As a result, it comes as little surprise to see all of the 'big three' US legacy carriers among the top 10 airlines when it comes to flights operated, with Delta Air Lines sitting 10th on 530 this February. These offer: 127,264 seats (11th). 504,739,706 available seat miles (9th).
Want answers to more key questions in aviation? Check out the rest of our guides here ! Delta's top route from London Heathrow this February serves its mai.
