| 1 | OLO | Soloflight | Callsign: Solo, | GB | AVCODES |
| 2 | OLO | Soloflight | | | ICAO1 |
| 3 | OLO | Ontario L'Orignal Ry., Inc. | 7/2000-7/2005 | | NAKINA |
| 4 | OLO | Ontario L'Orignal Ry., Inc. | Jul-00 | | NRHS |
| 5 | OLO | ONTARIO L'ORIGNAL RAILWAY INC. | | | PWRC |
| 6 | OLO | Ontario L'Orignal Railway | | | RSRV |
| 7 | OLO | ONTARIO L'ORIGNAL RAILWAY INC | | | SCAC4 |
| 8 | OLOB | ORT LOGISTICS | | | SCAC4 |
| 9 | OLOF | ONESOURCE LOGISTICS | | | SCAC4 |
| 10 | OLOM | Dopravni podnik mesta Olomouce | Real: DPMO, City: Olomouc | CZ | TRAFFIC |
| 11 | OLOS | OAKLAND LOGISTICS SERVICE INC | | | SCAC4 |
| 12 | OLOT | OSCARS LOGISTICS | | | SCAC4 |
| 13 | OLOV | OLSON, OLIVER J & CO | | | SCAC3 |
