aHeathrow to Dubai International Airport (DXB) has been ranked fourth among the busiest long-haul routes in the world, according to Simple Flying. There are 64 weekly flights from Dubai Airport to Heathrow, and up to 10 daily flights.
Three airlines operate on this route: Emirates (47 weekly flights), British Airways (19 weekly flights), and Royal Brunei (three weekly flights).
The JFK to Heathrow route topped the rankings with 157 weekly flights, followed by Los Angeles to Heathrow with 84 weekly flights, and JFK to Paris in third place with 82 weekly flights.
Source (Alkhaleej Emirati Newspaper, Edited)