| Thessaloniki to Oria | 278.37 mi (447.99 km) |
| Thessaloniki to Oristano | 756.97 mi (1,218.23 km) |
| Thessaloniki to Orta Nova | 379.64 mi (610.97 km) |
| Thessaloniki to Orte | 559.34 mi (900.18 km) |
| Thessaloniki to Ortona | 456.98 mi (735.44 km) |
| Thessaloniki to Orvieto | 576.29 mi (927.44 km) |
| Thessaloniki to Orzinuovi | 733.30 mi (1,180.14 km) |
| Thessaloniki to Osimo | 522.72 mi (841.23 km) |
| Thessaloniki to Ospitaletto | 731.16 mi (1,176.69 km) |
| Thessaloniki to Ostuni | 280.40 mi (451.26 km) |
| Thessaloniki to Ottaviano | 442.77 mi (712.57 km) |
| Thessaloniki to Ovada | 775.72 mi (1,248.39 km) |
| Thessaloniki to Ozieri | 729.96 mi (1,174.75 km) |
| Thessaloniki to Paceco | 584.28 mi (940.31 km) |
| Thessaloniki to Pachino | 501.76 mi (807.51 km) |
