| 1 | CHK | Flying Boat Inc. d/b/a Chalk's International Airines | IATA: OP, Callsign: Chalks, IATA Prefix: 370, | USA | AVCODES |
| 2 | CHK | Flying Boat Inc. d/b/a Chalks International Airlines | IATA: OP, IATA Prefix: 370, | USA | AVCODES |
| 3 | CHK | Chalk's International Airlines | Callsign: Chalks, | USA | AVCODES |
| 4 | CHKA | CHOHAN TRUCKING | | | SCAC4 |
| 5 | CHKB | CHRISTIANSEN TRUCKING CO | | | SCAC3 |
| 6 | CHKD | CHEEK DWIGHT TRUCKING | | | SCAC3 |
| 7 | CHKE | CHEROKEE TRANSPORT INC | | | SCAC3 |
| 8 | CHKE | CHK TRANSPORT INC | | | SCAC4 |
| 9 | CHKF | COUCH TRUCKING COMPANY LLC | | | SCAC4 |
| 10 | CHKG | CHUCKS GENERAL TRUCKING | | | SCAC3 |
| 11 | CHKG | CHEMCORE TRUCKING COMPANY INC | | | SCAC4 |
| 12 | CHKH | C & H TRUCKING | | | SCAC3 |
| 13 | CHKH | CHARLES TRUCKING LLC | | | SCAC4 |
| 14 | CHKI | COCHIOLO TRUCKING INC | | | SCAC4 |
| 15 | CHKJ | CHALE TRUCKING | | | SCAC4 |
| 16 | CHKK | CHUCKS TRUCKING | | | SCAC3 |
| 17 | CHKL | CHEROKEE LINES INC | | | SCAC3 |
| 18 | CHKM | CHEROKEE MILLING COMPANY INC | | | SCAC3 |
| 19 | CHKM | CHARTER LINK LOGISTICS LIMITED | | | SCAC4 |
| 20 | CHKP | CHECOS TRUCKING | | | SCAC4 |
| 21 | CHKQ | CHEROKEE TRUCK | | | SCAC3 |
| 22 | CHKQ | CHARLES TRUCKING | | | SCAC4 |
| 23 | CHKS | CHUCKS TRANSPORT INC | | | SCAC4 |
| 24 | CHKT | CORNHUSKER TRUCKING COMPANY INC | | | SCAC3 |
| 25 | CHKT | CHUCKS TRANSPORT | | | SCAC4 |
| 26 | CHKU | CHUNG HWA CHEMICAL INDUSTRIAL WORKS | | | SCAC4 |
| 27 | CHKV | CHECKER MOVING & STORAGE INC | | | SCAC3 |
| 28 | CHKW | CHICKENHAW | | | SCAC4 |
| 29 | CHKY | CHRISTIAN TRUCKING LLC | | | SCAC4 |
