| 1 | RIT | Asian Spirit, Inc. | IATA: 6K, Callsign: Asian Spirit, Established in 1995. Commenced operations in April 1996. Name changed to Zest Airways w.e.f. 30 September 2008. Designator 6K reinstated by IATA | RP | AVCODES |
| 2 | RIT | Asian Spirit | IATA: 6K | | ICAO1 |
| 3 | RITA | RICHARDS TANK TRUCK SERVICE | | | SCAC3 |
| 4 | RITAL | Rail Italia S.r.l. | | IT | VKM |
| 5 | RITB | RICE TRANSPORT INC | | | SCAC3 |
| 6 | RITB | Riggenthalerbahn | | FAN | TRAFFIC |
| 7 | RITD | RODEWAY INTERNATIONAL TRADING LTD | | | SCAC3 |
| 8 | RITD | RITCHIE DISTRIBUTING COMPANY | | | SCAC4 |
| 9 | RITE | RITEWAY EXPRESS, INC | | | SCAC3 |
| 10 | RITF | RISS TRANSPORT | | | SCAC3 |
| 11 | RITG | RINGER TRUCKING | | | SCAC3 |
| 12 | RITH | RITE TRANSPORTTION CO | | | SCAC3 |
| 13 | RITI | ROBIN INTERNATIONAL TRANSPORT INC | | | SCAC4 |
| 14 | RITM | RICHARD THE MOVER | | | SCAC3 |
| 15 | RITM | RIGHT TIME TRUCKING INC | | | SCAC4 |
| 16 | RITO | RITTER FOOD CORP | | | SCAC3 |
| 17 | RITP | RICCI TRANSPORTATION CO INC | | | SCAC3 |
| 18 | RITQ | RITTER OIL COMPANY | | | SCAC4 |
| 19 | RITR | RIOLO TRANSPORTATION INC | | | SCAC4 |
| 20 | RITS | ROCK ISLAND TRANSFER AND STORAGE CO | | | SCAC3 |
| 21 | RITT | RITTER TRUCK LINE, INC | | | SCAC3 |
| 22 | RITT | RITTERMAN TRUCKING LLC | | | SCAC4 |
| 23 | RITW | RTC | | | SCAC4 |
| 24 | RITY | R I T | | | SCAC3 |
| 25 | RITY | RIT TRUCKING INC | | | SCAC4 |
