By Nathalie Craig10 Jul 2018Ever wondered which airline route is the most profitable in the word? The Official Airline Guide has revealed the answer in a new list detailing which flights are raking in the most cash.To form the list, The Official Airline Guide gathered data on airline revenue from April 2017 to March 2018.It categorised the big money making flights both by route and by carrier to see just how much profit each brought in over the course of a year.Only one flight cracked the US$1 billion-dollar threshold. Can you guess which one? 1. British Airways New York JFK to London Heathrow: $1.04 billionBritish Airways’ flagship service between London Heathrow and New York JFK flies 15 daily non-stops in either direction between the two airports. OAG said the revenue earned through this route accounted for about 6% of the airline’s total earnings in 2017. 2. Qantas Airways Melbourne to Sydney, $855 millionThis was the only short-haul flight to makes the list of the most profitable flights. The reason this 1 hour 20 minute flight makes so much money is largely due to the fact that there are 65 flights a day on just that one route. 3. Emirates London Heathrow to Dubai, $819 million‘Another London Heathrow route joins the top earners list. 4. Singapore Airlines London Heathrow to Singapore, $710 millionAre you noticing a trend here? Yet another London Heathrow Route. John Grant of OAG said that, incredibly, five of the top 10 revenue earners are either to or from London Heathrow which may explain the ongoing debate about the third runway with the increased competition damaging those lucrative earners. 5. American Airlines Los Angeles LAX to New York JFK, $698 millionThis poplar route is another big earner.All in all, the list shows that long-haul business travel remains the top generator of revenue across the world.See the full top 10 list below.READ: RECORD BREAKING: Emirates SMASHES profits, againREAD: FLIGHT CENTRE’S TRANSFORMATION PLANS & PROFITSDid you pick what the world’s most profitable route was? Let us know below Other stories you may likeEND OF AN ERA: Airbus painfully decides to discontinue the A380SKY HIGH: Virgin Australia reports strongest profit in 11 yearsMAKING WAVES: All the deets on 6 of the most exciting new cruise ships!