From Longman Dictionary of Contemporary Englishlong-haul flight/route/destination etclong-haul flight/route/destination etca long-haul flight etc is over a very long distance OPP short-haul → long-haul
Examples from the Corpus
long-haul flight/route/destination etc• Hence the decision to buy smaller wide-body jets for long-haul routes.• It's jet lag and it affects nearly everyone on long-haul flights.• The aunts have brought more baggage than the passengers Rainbow takes to long-haul flights at Heathrow.• Table 11.9 shows Kuoni's top long-haul destinations in 1983-4.• By comparison with trying to sleep on the cramped seating of today's long-haul flights it was luxury indeed. 