| 1701 | KEYW | KEY CARTAGE INC | | | SCAC3 |
| 1702 | KEYX | Keywell Corp. | 1/1994 (not listed); 7/2000-7/2005 | | NAKINA |
| 1703 | KEYX | Keywell Corp. | 1/94-7/2000 | | NRHS |
| 1704 | KEYX | KEYWELL CORPORATION | | | PWRC |
| 1705 | KEYX | Keywell Corporation | | | RSRV |
| 1706 | KEYX | KEYWELL CORPORATION | | | SCAC4 |
| 1707 | KEYY | KEY TRANSPORTATION | | | SCAC3 |
| 1708 | KEZ | KIESTER ELEVATOR | | | PWRC |
| 1709 | KEZM | KEITZMAN, GLEN | | | SCAC3 |
| 1710 | KEZM | KEZMAN TRANSPORTATION SERVICES INC | | | SCAC4 |
| 1711 | KEZO | KEZO EXPRESS | | | SCAC4 |
| 1712 | KEZT | KEZER TRANSPORTATION | | | SCAC3 |
| 1713 | KF | Oy Air Botnia AB | ICAO: KFB, Callsign: Botnia, IATA Prefix: 142, Name changed to Blue 1 in January 2004. ICAO callsign changed to Bluefinn | FIN | AVCODES |
| 1714 | KF | Congofrigo | Callsign: Congofrigo, | ZAR | AVCODES |
| 1715 | KF | Blue1 Oy | ICAO: KFB, Callsign: Bluefinn, IATA Prefix: 142, Name changed from Oy Air Botnia AB. ICAO designator changed to BLF. ICAO callsign changed to Bluefinn | FIN | AVCODES |
| 1716 | KF | Blue1 Oy | ICAO: BLF, Callsign: Bluefinn, IATA Prefix: 142, Designator KF recalled by IATA. Sold to CityJet in October 2015. Name changed from Oy Air Botnia AB. ICAO designator changed from KFB. ICAO callsign changed from Botnia | FIN | AVCODES |
| 1717 | KF | Air Flight Luftfahrt GmbH | ICAO: KFK, Callsign: Air Flight, Name changed to German Wings Luftfahrtunternehman GmbH | D | AVCODES |
| 1718 | KF | German Wings Luftfahrtunternehman GmbH | ICAO: KFK, Callsign: German Wings, Name changed to Air Flight Luftfahrt GmbH | D | AVCODES |
| 1719 | KF | Air Belgium SA | ICAO: ABB, Callsign: Air Belgium, | B | AVCODES |
| 1720 | KFA | Kelowna Flightcraft International Air Cargo Ltd. d/b/a Winnport Air Cargo | IATA: W8, Callsign: Flightcraft, IATA Prefix: 489, IATA designator changed from KN | CDN | AVCODES |
| 1721 | KFA | Kelowna Flightcraft International Air Cargo Ltd. d/b/a Winnport Air Cargo | IATA: KN, Callsign: Flightcraft, IATA designator changed to W8 | CDN | AVCODES |
| 1722 | KFA | Kelowna Flightcraft Air Charter Ltd. | IATA: KW, Callsign: Flightcraft, IATA Prefix: 194, IATA designator changed to FK. Designator KW* reinstated by IATA | CDN | AVCODES |
| 1723 | KFA | Kelowna Flightcraft Air Charter Ltd. | IATA: FK, Callsign: Flightcraft, IATA Prefix: 758, IATA designator changed from KW*. Designator KW* reinstated by IATA | CDN | AVCODES |
| 1724 | KFA | Kelowna Flightcraft Air Charter | | | ICAO1 |
| 1725 | KFAM | KARNI FAMILY FARM LLC | | | SCAC4 |
| 1726 | KFAR | KOKOSA FUELS INC | | | SCAC4 |
| 1727 | KFAS | KNOWLES FARMS | | | SCAC4 |
| 1728 | KFAY | KELBLEY TRANSPORTATION LIMITED | | | SCAC4 |
| 1729 | KFB | Oy Air Botnia AB | IATA: KF, Callsign: Botnia, IATA Prefix: 142, Name changed to Blue 1 in January 2004. ICAO callsign changed to Bluefinn | FIN | AVCODES |
| 1730 | KFB | Blue1 Oy | IATA: KF, Callsign: Bluefinn, IATA Prefix: 142, Name changed from Oy Air Botnia AB. ICAO designator changed to BLF. ICAO callsign changed to Bluefinn | FIN | AVCODES |
| 1731 | KFB | Superior Transportation Associates, Inc d/b/a STAjets | Callsign: Mission, | USA | AVCODES |
| 1732 | KFBE | Köln-Frechen-Benzelrather Eisenbahn GmbH | City: Köln | D | TRAFFIC |
| 1733 | KFBK | KF BROKERAGE LLC | | | SCAC4 |
| 1734 | KFBL | KENTUCKY FLATBEDS LLC | | | SCAC4 |
| 1735 | KFBS | KELLEY FREIGHT BROKERS | | | SCAC4 |
| 1736 | KFBZ | K & F BRICK COMPANY | | | PWRC |
| 1737 | KFC | Kremenchuk Flight College | Callsign: Kremenchuk, | UA | AVCODES |
| 1738 | KFC | Kremenchuk Flight College | | | ICAO1 |
| 1739 | KFCC | K-FIVE CONSTRUCTION CORP | | | SCAC3 |
| 1740 | KFCC | K-FIVE CONSTRUCTION CORP | | | SCAC4 |
| 1741 | KFCL | KINGFIELD COMPANY LTD., | | | SCAC3 |
| 1742 | KFCL | K F EXPRESS INC | | | SCAC4 |
| 1743 | KFCM | KASILOF FISH COMPANY | | | SCAC4 |
| 1744 | KFCR | KHUSHI FREIGHT CARRIER | | | SCAC4 |
| 1745 | KFCS | KNIGHT FLIGHT CARGO SERVICES INC | | | SCAC4 |
| 1746 | KFCT | KREIFELS TRUCKING LLC | | | SCAC4 |
| 1747 | KFCY | KINGDOM FREIGHT COMPANY | | | SCAC4 |
| 1748 | KFCZ | KENT FEED COMPANY | | | PWRC |
| 1749 | KFDG | KOCH FOODS OF GAINESVILLE LLC | | | SCAC4 |
| 1750 | KFDI | KLEINBERG, FRANK S DISTRIBUTORS INC | | | SCAC3 |
| 1751 | KFDI | KRINOS FOODS INC | | | SCAC4 |
| 1752 | KFDL | KINGSFORD LINES III LTD | | | SCAC3 |
| 1753 | KFDL | KIDKRAFT | | | SCAC4 |
| 1754 | KFDY | KAN FLY DELIVERY | | | SCAC4 |
| 1755 | KFE | Skyfree Ltd. | Callsign: Skyfree, Name changed to Skyfirst Ltd. ICAO Callsign changed to Morito. | M | AVCODES |
| 1756 | KFE | Skyfirst Ltd. | Callsign: Morito, Name changed from Skyfree Ltd. ICAO Callsign changed to Skyfree. | M | AVCODES |
| 1757 | KFE | Skyfirst Ltd. | Callsign: Morito, Name changed from Skyfree Ltd. ICAO Callsign changed to Skyfree. | M | AVCODES |
| 1758 | KFEC | K FIVE (5) EXPRESS INC | | | SCAC4 |
| 1759 | KFFA | KENNEDY FUEL & FEED INC | | | SCAC4 |
| 1760 | KFFC | K F F INC | | | SCAC3 |
| 1761 | KFFI | K F F I TRUCKING INC | | | SCAC3 |
| 1762 | KFFL | KLEEFELD FARM SALES | | | SCAC4 |
| 1763 | KFFM | KEY FACTOR FREIGHT MANAGEMENT INC | | | SCAC4 |
| 1764 | KFFN | KFF INC | | | SCAC3 |
| 1765 | KFFS | KAUFFS TRANSPORTATION SYSTEMS | | | SCAC4 |
| 1766 | KFFT | KACHEMAK FAST FREIGHT | | | SCAC3 |
| 1767 | KFFT | KRAFFT TRUCKING INC | | | SCAC4 |
| 1768 | KFGR | KOCHER FLOWER GROWERS | | | SCAC4 |
| 1769 | KFGX | Knauf Fiber Glass, GmbH | added 4/1978; 1/1980; eliminated 7/1987; 1/1994-7/2005 (not listed) | | NAKINA |
| 1770 | KFGX | Knauf Fiber Glass, GmbH | added 4/78; 1/80; eliminated 7/87; 1/94-7/2000 | | NRHS |
| 1771 | KFGX | KNAUF FIBER GLASS, GmbH | | | PWRC |
| 1772 | KFGX | Knauf Fiber Glass | | | RSRV |
| 1773 | KFGX | KNAUF FIBERGLASS, GMBH | | | SCAC4 |
| 1774 | KFHA | KJ FREIGHT HAULER LLC | | | SCAC4 |
| 1775 | KFHB | KFH | | | SCAC4 |
| 1776 | KFHD | KFH DELIVERY SERVICE, INC | | | SCAC3 |
| 1777 | KFIC | KODIAK FRET INTERNATIONAL INC | | | SCAC4 |
| 1778 | KFID | KISWANI FREIGHT INC | | | SCAC4 |
| 1779 | KFIE | KR FREIGHTWAY INC | | | SCAC4 |
| 1780 | KFIH | KETTLE FISH INC | | | SCAC4 |
| 1781 | KFIM | KRIZAN FARM INC | | | SCAC4 |
| 1782 | KFIN | KEA-FIN INC | | | SCAC3 |
| 1783 | KFIT | KASPER FACTOR INC, THE | | | SCAC4 |
| 1784 | KFIV | KAPPERS FABRICATING INC | | | SCAC4 |
| 1785 | KFIX | J & J Railcar Leasing, LLC | 7/2005 (not listed); added 4/2009 | | NAKINA |
| 1786 | KFIX | J & J RAILCAR LEASING, LLC | | | PWRC |
| 1787 | KFIX | J & J RAILCAR LEASING LLC | | | SCAC4 |
| 1788 | KFIX | J & J Railcar Leasing, LLC | | USA | TRAFFIC |
| 1789 | KFK | German Wings Luftfahrtunternehman GmbH | IATA: PW, Callsign: German Wings, Ceased operations. Name changed to Air Flight Luftfahrt GmbH | D | AVCODES |
| 1790 | KFK | Aero Charter Krifka Ges mbH | Callsign: Krifka Air, | A | AVCODES |
| 1791 | KFK | Air Flight Luftfahrt GmbH | IATA: KF, Callsign: Air Flight, Name changed to German Wings Luftfahrtunternehman GmbH | D | AVCODES |
| 1792 | KFK | German Wings Luftfahrtunternehman GmbH | IATA: KF, Callsign: German Wings, Name changed to Air Flight Luftfahrt GmbH | D | AVCODES |
| 1793 | KFK | Aero Charter Krifka | | | ICAO1 |
| 1794 | KFL | Flamingo Airways Limited | IATA: YS, Callsign: Nakuru, IATA designator changed to F7. Subsidiary of Kenya Airways | EAK | AVCODES |
| 1795 | KFL | Flamingo Airways Limited | IATA: F7, Callsign: Nakuru, ICAO callsign changed to Batian / IATA designator changed from YS*. Subsidiary of Kenya Airways | EAK | AVCODES |
| 1796 | KFL | Flamingo Airways Limited | IATA: F7, Callsign: Batian, ICAO callsign changed from Nakuru / IATA designator changed from YS*. Subsidiary of Kenya Airways | EAK | AVCODES |
| 1797 | KFLC | KOCH & FIELDS LLC | | | SCAC4 |
| 1798 | KFLD | KING FREIGHT LINES LIMITED (LOCAL D | | | SCAC4 |
| 1799 | KFLH | KFL HAWAIIAN INC | | | SCAC3 |
| 1800 | KFLI | KUSTOM FREIGHTLINES LLC | | | SCAC4 |
