Industrial Classification By SSIC (2020) Section H : AIR TRANSPORT 51 : AIR TRANSPORT 51 : AIR TRANSPORT 510 : AIR TRANSPORT 5100 : Air Transport 51001 : Airlines (passenger) 51002 : Airlines (freight) 51003 : Branches of foreign airlines (passenger) 51004 : Branches of foreign airlines (freight) 51005 : Aircraft chartering with operator