| 1 | CHG | ChallengAir | | B | AVCODES |
| 2 | CHG | ChallengAir | IATA: 1I, Callsign: Belgochallenge, | B | AVCODES |
| 3 | CHG | AC Challenge Aero LLC | IATA: 5U, Callsign: Skychallenger, Designator 5U recalled by IATA | UA | AVCODES |
| 4 | CHG | Challenge Airlines (BE) S.A. | IATA: X7, Callsign: Challenge, IATA Prefix: 744, ICAO Designator changed from FRH. Name changed from ACE Belgium Freighters S.A. | B | AVCODES |
| 5 | CHG | AC Challenge Aero | | | ICAO1 |
| 6 | CHGA | CHICAGO TRANSIT AUTHORITY | | | SCAC3 |
| 7 | CHGC | CAHILL GRAIN COMPANY | | | SCAC3 |
| 8 | CHGD | CHICAGO DISTRIBUTION COMPANY L P | | | SCAC3 |
| 9 | CHGD | CHICAGO DISTRIBUTION COMPANY L P | | | SCAC4 |
| 10 | CHGE | CHARLEY, G E | | | SCAC3 |
| 11 | CHGF | CARROLL HOSPITAL GROUP INC | | | SCAC4 |
| 12 | CHGG | CHIGGER EQUIPMENT HAUL INC | | | SCAC4 |
| 13 | CHGH | COLUMBIA HOLDINGS INC | | | SCAC4 |
| 14 | CHGI | CHATTANOOGA TRANSFER AND STORAGE CO | | | SCAC3 |
| 15 | CHGJ | CHG LOGISTICS INCORPORATED | | | SCAC4 |
| 16 | CHGL | CHICAGO HARVARD & GENEVA LAKE RWY | | | PWRC |
| 17 | CHGM | CHRISMAN LP GAS | | | SCAC4 |
| 18 | CHGN | CHAMPAGNE LIMOUSINE SERVICE | | | SCAC3 |
| 19 | CHGN | CHOICEONE LOGISTICS INC | | | SCAC4 |
| 20 | CHGP | CHALLENGE TRANSPORTATION INC | | | SCAC3 |
| 21 | CHGQ | CHICAGO HAULAGE INC | | | SCAC3 |
| 22 | CHGR | CHALLENGER MANUFACTURING LTD | | | SCAC4 |
| 23 | CHGS | CASCADE HOLDINGS INC | | | SCAC4 |
| 24 | CHGT | CHICAGO TRANSPORT INC | | | SCAC3 |
| 25 | CHGV | CHAMBERLAIN HAULING | | | SCAC4 |
| 26 | CHGW | CHICAGO TOWING INC | | | SCAC3 |
| 27 | CHGY | CHARCY COMPANY | | | SCAC3 |
| 28 | CHGY | CHARCY COMPANY | | | SCAC4 |
| 29 | CHGZ | CHOTEAU GRAIN COMPANY | | | PWRC |
