| 1 | NWT | NWT Air | Callsign: Territorial, Designator NV recalled by IATA. Name changed from NTW Air / Air Canada Connector | CDN | AVCODES |
| 2 | NWT | NTW Air | IATA: NV, Callsign: Territorial, Name changed to NWT Air. Air Canada Connector | CDN | AVCODES |
| 3 | NWT | NWT Air | IATA: NV, Callsign: Territorial, Designator NV recalled by IATA. Name changed from NTW Air / Air Canada Connector | CDN | AVCODES |
| 4 | NWT | NW Territoral Airways | IATA: NQ, Bought and merged into First Air during 1997. | CDN | AVCODES |
| 5 | NWT | Northwest Territorial Airways | | | ICAO1 |
| 6 | NWT | Northern Terminal | 1/1994 | | NAKINA |
| 7 | NWT | Northern Terminal | Jan-94 | | NRHS |
| 8 | NWT | *NORTHWESTERN TERMINAL (OUT OF EXISTENCE) | | | PWRC |
| 9 | NWT | *NORTH WEST TIMBER, LTD. | | | PWRC |
| 10 | NWTA | NEWSOM TRANSPORTATION INC | | | SCAC3 |
| 11 | NWTB | NATIONWIDE TRANSPORTATION SERVICES | | | SCAC3 |
| 12 | NWTB | NORTHWOODS TRANSPORT INC | | | SCAC4 |
| 13 | NWTC | NEWSOM TRUCKING AND CONSTRUCTION CO | | | SCAC3 |
| 14 | NWTC | NORTH WEST CRANE LTD | | | SCAC4 |
| 15 | NWTD | N W T DISTRIBUTION SERVICES | | | SCAC3 |
| 16 | NWTE | NOLAN-WALKER TRUCK LINES INCORPORAT | | | SCAC3 |
| 17 | NWTF | NATIONWIDE TRAFFIC SERVICE BUREAU I | | | SCAC3 |
| 18 | NWTF | NEWMANS TRANSFER | | | SCAC4 |
| 19 | NWTG | NORTHWEST TOWING INC | | | SCAC3 |
| 20 | NWTG | NEWBORN TRUCKING INC | | | SCAC4 |
| 21 | NWTH | NEW WAY TRANSPORTATION INC | | | SCAC4 |
| 22 | NWTI | NOBLE, WILLIAM TRUCKING INC | | | SCAC3 |
| 23 | NWTJ | NEWSOM, JIM TRUCKING | | | SCAC3 |
| 24 | NWTJ | N & W TRANSFER INC | | | SCAC4 |
| 25 | NWTK | NORTHWEST TANK LINES INC | | | SCAC4 |
| 26 | NWTL | NEW WORLD TRANSPORTATION | | | SCAC3 |
| 27 | NWTM | NEWMAN, T V MOVING INC | | | SCAC3 |
| 28 | NWTM | NORTHWEST TIMBER TRANSPORT | | | SCAC4 |
| 29 | NWTN | NEWTON, JOHN TRUCKING CO | | | SCAC3 |
| 30 | NWTO | NORTHWEST TRANSPORTATION & WAREHOUS | | | SCAC3 |
| 31 | NWTP | NATIONSWAY TRANSPORT SERVICE, INC | | | SCAC3 |
| 32 | NWTP | NORTHWEST TRANSPORT SERVICE INC | | | SCAC4 |
| 33 | NWTQ | NOMAS WORLD TRADING CO | | | SCAC3 |
| 34 | NWTR | NORTHWEST TRANSPORT LTD | | | SCAC3 |
| 35 | NWTR | NORTHWEST TRANSPORT LTD | | | SCAC4 |
| 36 | NWTS | NATIONWIDE TRANSFER INC | | | SCAC4 |
| 37 | NWTT | NEWTOWN TRUCKING INC | | | SCAC3 |
| 38 | NWTT | N & W TRANSPORTATION INC | | | SCAC4 |
| 39 | NWTW | NORTHWEST TRANSFER & WAREHOUSE INC | | | SCAC3 |
| 40 | NWTW | NEW WAVE TRANSPORT LLC | | | SCAC4 |
| 41 | NWTX | North West Timber Co. | 7/2000-7/2005 (not listed) | | NAKINA |
| 42 | NWTX | NorthWest Timber Co. | added 1/1997; eliminated 7/1997 | | NAKINA |
| 43 | NWTX | North West Timber Ltd. | 1/1994 (not listed) | | NAKINA |
| 44 | NWTX | Northwestern Tank Line Co. | 7/1937-4/1938 | | NAKINA |
| 45 | NWTX | Northwestern Tank Line Co. | Apr-38 | | NRHS |
| 46 | NWTX | North West Timber Co. | Jan-94 | | NRHS |
| 47 | NWTX | NorthWest Timber Co. | added 1/97; eliminated 7/97; 7/2000 | | NRHS |
| 48 | NWTX | *NORTHWESTERN TANK LINE CO. | | | PWRC |
| 49 | NWTX | *NORTH WEST TIMBER LIMITED | | | PWRC |
| 50 | NWTX | North West Timber | | | RSRV |
| 51 | NWTX | NORTH WEST TIMBER, LTD. | | | SCAC4 |
| 52 | NWTZ | NW TRANSPORT | | | PWRC |
| 53 | NWTZ | NW Transport | | | RSRV |
| 54 | NWTZ | NW TRANSPORT | | | SCAC4 |
