| 1 | ZI | Aigle Azur | ICAO: AAF, Callsign: Aigle Azur, Ceased operations on 07 September 2019. IATA designator ZI reinstated by IATA. IATA designator ZI recalled by IATA | F | AVCODES |
| 2 | ZIBE | ZIBERT TRANSPORT CO | | | SCAC1 |
| 3 | ZIBU | ZHEJIANG LIANYUN BOX LOGISTICS TECHNOLOGY CO., LTD. | | PRC | BIC |
| 4 | ZICG | ŽELJEZNIČKA INFRASTRUKTURA CRNE GORE | | ME | VKM |
| 5 | ZICJ | ZICHERMAN, JOSHUA JOSEPH | | | SCAC4 |
| 6 | ZICR | ZION INTERNATIONAL CARRIERS | | | SCAC4 |
| 7 | ZIDJ | ZIDIAN, | | | SCAC4 |
| 8 | ZIEF | ZIEFLE, KURT FARMS | | | SCAC4 |
| 9 | ZIGG | ZIGGYS TRUCKING | | | SCAC4 |
| 10 | ZIK | ZAKŁAD INŻYNIERII KOLEJOWEJ | | PL | VKM |
| 11 | ZIL | Zillertalbahn | | A | TRAFFIC |
| 12 | ZIMA | ZIMA CORPORATION | | | SCAC4 |
| 13 | ZIMC | ZIMMERMAN, C OIL LLC | | | SCAC4 |
| 14 | ZIME | ZIMEX LOGITECH INC | | | SCAC4 |
| 15 | ZIMJ | ZIMMERMAN, JESS A | | | SCAC1 |
| 16 | ZIMJ | ZIMMERMAN, JESS A | | | SCAC4 |
| 17 | ZIMM | ZIMMERMAN, ROY W & SONS | | | SCAC4 |
| 18 | ZIMN | ZIMMERMAN TRUCKING INC | | | SCAC4 |
| 19 | ZIMQ | ZIM EXPRESS | | | SCAC4 |
| 20 | ZIMS | ZIMS CHEESE INC | | | SCAC4 |
| 21 | ZIMU | ZIM INTEGRATED SHIPPING SERVICES LTD | | IL | BIC |
| 22 | ZIMU | ZIM ISRAEL NAVIGATION CO LTD | | | PWRC |
| 23 | ZIMU | Zim Israel Navigation Limited | | | RSRV |
| 24 | ZIMU | ZIM ISRAEL NAVIGATION CO | | | SCAC1 |
| 25 | ZIMU | ZIM ISRAEL NAVIGATION CO LTD | | | SCAC4 |
| 26 | ZINA | ZINA SHIPPING CORP MONROVIA LIBERIA | | | SCAC4 |
| 27 | ZINC | ZST INC | | | SCAC4 |
| 28 | ZINK | ZINK TRANSPORT LTD | | | SCAC4 |
| 29 | ZINQ | ZWEIGLES INC | | | SCAC4 |
| 30 | ZIPE | ZIPP EXPRESS LLC | | | SCAC4 |
| 31 | ZIPL | ZIPLINE LOGISTICS | | | SCAC4 |
| 32 | ZIPP | ZIPP MAYFLOWER LLC | | | SCAC4 |
| 33 | ZIPU | TANK SERVICE INC | | USA | BIC |
| 34 | ZIPU | Tank Service Inc. (Houston) | | | RSRV |
| 35 | ZIPV | ZIPS SERVICE | | | SCAC4 |
| 36 | ZIPX | Zip Transportation Co., Inc. | added 7/1965; 7/1965-1/1994; eliminated 4/1994 | | NAKINA |
| 37 | ZIPX | Zip Transportation Co., Inc. | added 7/65; 7/65-1/94; eliminated 4/94 | | NRHS |
| 38 | ZIPX | ZIP TRANSPORTATION COMPANY, INC. | | | PWRC |
| 39 | ZIPX | Zip Transportation | | | RSRV |
| 40 | ZITA | ZITA LOGISTICS INC | | | SCAC4 |
| 41 | ZITL | Z & I TRUCKING LLC | | | SCAC4 |
| 42 | ZITU | SAFIM SRL | | I | BIC |
| 43 | ZITU | SAFIM SRL | | | SCAC4 |
| 44 | ZIXP | ZIPP-EXPRESS, INC | | | SCAC1 |
| 45 | ZIXP | ZIPP-EXRESS INC | | | SCAC4 |
| 46 | ZIZT | ZIZZO TRUCKING INC | | | SCAC4 |
