| 1 | YU | Aerolineas Dominicanas S.A. d/b/a Dominair | ICAO: ADM, Callsign: Dominair, IATA Prefix: 725, Designator YU restated IATA | DOM | AVCODES |
| 2 | YU | EuroAtlantic Airways, S.A. | ICAO: MMZ, Callsign: Euroatlantic, IATA Prefix: 551, IATA designator changed from MM*. Name changed to EuroAtlantic Airways Transportes Aereos, S.A. Formerly Air Zarco d/b/a Air Maderia | P | AVCODES |
| 3 | YU | EuroAtlantic Airways Transportes Aereos, S.A. | ICAO: MMZ, Callsign: Euroatlantic, IATA Prefix: 551, IATA designator changed from MM*. Name changed from EuroAtlantic Airways, S.A. Formerly Air Zarco d/b/a Air Maderia | P | AVCODES |
| 4 | YUAD | YUADI SHIPPING S A | | | SCAC4 |
| 5 | YUAF | Ratno vazduhoplovstvo i protivvazdušna odbrana (Yugoslav Air Force) | Real: RVIPVO | YU | TRAFFIC |
| 6 | YUAN | YUAN MAO LOGISTICS INC | | | SCAC4 |
| 7 | YUBT | YUEAN HAI FRAMING | | | SCAC4 |
| 8 | YUES | YU EXPRESS | | | SCAC4 |
| 9 | YUGL | YUSEN AIR & SEA SERVICE CO LTD | | | SCAC4 |
| 10 | YUI | Okinawa Urban Monorail Incorporated | | J | TRAFFIC |
| 11 | YUKA | YUKON AVIATION | | | SCAC4 |
| 12 | YUMI | YUMI FARMS INC | | | SCAC4 |
| 13 | YUR | YUMA VALLEY RAILROAD | | | PWRC |
| 14 | YURI | Yuri Kogen Railway | | J | TRAFFIC |
| 15 | YUSA | YUASA INVESTMENTS LIMITED | | | SCAC4 |
| 16 | YUZU | LOOP INTERMODAL LLC | | USA | BIC |
| 17 | YUZZD | Southwestern Railway | | RUS | TRAFFIC |
