Why Has London-New York Historically Been Such A Lucrative Route?

Data made available by aviation number-crunchers OAG currently shows that New York JFK to London Heathrow (LHR) is the eighth busiest international route in the world, with almost 4 million seats offered in 2023. When it comes to routes to and from both Europe and North America, this airport pair comes out on top, and it is the only transatlantic corridor to have made the top 10 rankings last year.