In aviation, the flight length is defined as the distance of a flight.
Eurocontrol defines short-haul routes as shorter than 1,500 km (810 nmi), medium-haul between 1,500 and 4,000 km (810 and 2,160 nmi) and long-haul routes as longer than 4,000 km (2,200 nmi). The Association of European Airlines defines Long-haul as flights to Americas, sub-Saharan Africa, Asia, Australasia and medium haul as flights to north Africa and Middle East.
Lufthansa defines its fleet as long-haul for wide-body aircraft, medium-haul for narrow-body aircraft like the A320 and B737 families, and short-haul for regional jets like the Embraer E-Jets or the Bombardier CRJ-900.Virgin Australia defines domestic flights as within Australia, Short Haul to South East Asia/Pacific and Long Haul to Abu Dhabi or Los Angeles.Air Berlin defines Short and medium-haul as flights to Europe/northern Africa and Long-haul to the rest of the world.Thomson Airways defines the Boeing 737 as a short and mid-haul airliner while the Boeing 767 and B787 as long haul.Air France defines short haul as domestic, medium haul as within Europe/North Africa and long haul as the rest of the world.
Thomas Cook Airlines defines a short-haul flight as taking less than three hours to complete. A short-haul flight for Cathay Pacific may be a flight between Hong Kong and Taipei or Manila. For Etihad, a short-haul might include a flight from the UAE to India.