| 1 | REA | Aer Arann Express (Comharbairt Gaillimh Teo) | IATA: RE, Callsign: Aer Arann, IATA Prefix: 809, Name changed to Stobart Air. ICAO designator changed to STK. Operates as Aer Arann Express. Designator RE reinstated by IATA | IRL | AVCODES |
| 2 | REA | Aer Arann Teoranta | IATA: EH, Callsign: Aer Arann, Name changed to Aer Arann Express (Comharbairt Gaillimh Teo) | IRL | AVCODES |
| 3 | REA | Red Air S.r.l. | IATA: L5, Callsign: Red Dominicana, IATA Prefix: 377, | DOM | AVCODES |
| 4 | REA | Aer Arann | IATA: RE | | ICAO1 |
| 5 | REA | RAILWAY EXPRESS AGENCY, INC. | | | PWRC |
| 6 | REA | Reading RailRoad | | USA | TRAFFIC |
| 7 | REAA | RELOCATE AMERICA (DIV OF AUTO TRANS | | | SCAC3 |
| 8 | REAB | REDERI A/B SEA LINK | | | SCAC3 |
| 9 | REAB | RELIABELT, ELIAS | | | SCAC4 |
| 10 | REAC | REA TRAILERS INC | | | SCAC3 |
| 11 | REAC | REAGENT CHEMICAL & RESEARCH INC | | | SCAC4 |
| 12 | READ | REEDEREI FRANK DAHL EK | | | SCAC4 |
| 13 | REAF | Royal Egyptian Air Force | 1937 - 1952 | ET | TRAFFIC |
| 14 | REAG | RELIABLE EXPRESS LLC | | | SCAC4 |
| 15 | REAG | Red Eagle | | GB | TRAFFIC |
| 16 | REAH | ROFRA ENTERPRISES INC | | | SCAC4 |
| 17 | REAI | REESE ASSOCIATES INC | | | SCAC3 |
| 18 | REAJ | REA EXPRESS INC | | | SCAC3 |
| 19 | REAK | RE-ACT TRANSPORTATION INC | | | SCAC3 |
| 20 | REAL | (REAZ) TRANSAMERICA LEASING, INC. | | | PWRC |
| 21 | REALT | Real Transit Inc. | | US-NJ | TRAFFIC |
| 22 | REAM | R E D TECHNOLOGIES LLC | | | SCAC4 |
| 23 | REAN | REAMS TRANSFER & STORAGE COMPANY | | | SCAC3 |
| 24 | REAN | REINDERS, LINDA | | | SCAC4 |
| 25 | REAO | REA REFRIGERATED TRUCKING INC | | | SCAC3 |
| 26 | REAP | REALE, P, TRUCKING | | | SCAC3 |
| 27 | REAQ | REPUBLIC AIRMODAL INC | | | SCAC3 |
| 28 | REAQ | REEL MAN | | | SCAC4 |
| 29 | REAS | REAS EXPRESS | | | SCAC3 |
| 30 | REAS | REAL INDUSTRIES | | | SCAC4 |
| 31 | REAT | REAS TRANSPORTATION | | | SCAC3 |
| 32 | REAT | REAS TRANSPORTATION | | | SCAC4 |
| 33 | REAU | ANDRADE & SANTOS LOCACAO DE MODULOS E IMPORTAÇÃO LTDA | | BR | BIC |
| 34 | REAU | (REAZ) TRANSAMERICA LEASING, INC. | | | PWRC |
| 35 | REAU | TAL International | | | RSRV |
| 36 | REAU | ANDRADE & SANTOS LOCACAO DE MODULOS | | | SCAC4 |
| 37 | REAW | ROSMER ENTERPRISES INC | | | SCAC4 |
| 38 | REAX | Reaxcer AB | | S | TRAFFIC |
| 39 | REAY | RELAY EXPRESS | | | SCAC3 |
| 40 | REAY | RELAY EXPRESS INC | | | SCAC4 |
| 41 | REAZ | TRANSAMERICA LEASING, INC. | | | PWRC |
| 42 | REAZ | TIP Intermodal Services | | | RSRV |
| 43 | REAZ | TRANSAMERICA TRANSPORTATION SERVICE | | | SCAC3 |
| 44 | REAZ | TRANSPORT INTERNATIONAL POOL INC | | | SCAC4 |
