| 1 | KNI | Kaliningradavia Open Joint Sotck Company | IATA: KD, Callsign: Kaliningrad Air, Name changed to KD Avia Open Joint Stock Company | RUS | AVCODES |
| 2 | KNI | KD Avia Open Joint Stock Company | IATA: KD, IATA Prefix: 093, Ceased Operations. Name changed from Kaliningradavia Open Joint Sotck Company | RUS | AVCODES |
| 3 | KNI | KD Avia | IATA: KD | | ICAO1 |
| 4 | KNIC | K-NINE CARTAGE INC | | | SCAC4 |
| 5 | KNID | K & I DISTRIBUTORS INC | | | SCAC3 |
| 6 | KNID | KANE INSTRUMENTATION LTD | | | SCAC4 |
| 7 | KNIF | KNIFE RIVER CORPROATION NORTH CENTR | | | SCAC4 |
| 8 | KNIG | KNIGHT TRANSPORTATION INC | | | SCAC3 |
| 9 | KNIG | KNIGHT TRANSPORTATION INC | | | SCAC4 |
| 10 | KNIH | KNIFFEN HEAVY HAULING | | | SCAC3 |
| 11 | KNII | KUEHNE & NAGEL INTERNATIONAL LTD | | | SCAC3 |
| 12 | KNIJ | KUEHNE & NAGEL INC | | | SCAC4 |
| 13 | KNIL | KNILL H S COMPANY LIMITED | | | SCAC3 |
| 14 | KNIL | KNIGHT INTERNATIONAL CORPORATION | | | SCAC4 |
| 15 | KNIM | KNIGHT TRANSPORTATION INC (INTERMOD | | | SCAC4 |
| 16 | KNIP | KNIPFEL CARTAGE LIMITED | | | SCAC3 |
| 17 | KNIQ | K NINE INC | | | SCAC4 |
| 18 | KNIR | KNIGHT REFRIGERATED LLC | | | SCAC4 |
| 19 | KNIS | KNIGHTS TRANSPORTATION INC | | | SCAC4 |
| 20 | KNIT | KNIGHT TRUCKING LLC | | | SCAC4 |
