Boeing operate just over half of the world's longest flights

Ten longest flight routes of 2020, by planes used

Boeing 787-9
36%

Airbus A350-900
27%

Airbus A380-800
18%

Boeing B777-200
18%

Note: Of the 10 longest routes, there are 11 planes, as the Singapore / San Fracisco route is served by two carriers

Source: OAG / Elite Traveler Analysis