| Oostkamp to Oria | 1,007.64 mi (1,621.65 km) |
| Oostkamp to Oristano | 818.75 mi (1,317.64 km) |
| Oostkamp to Orta Nova | 900.92 mi (1,449.89 km) |
| Oostkamp to Orte | 739.14 mi (1,189.53 km) |
| Oostkamp to Ortona | 804.06 mi (1,294.02 km) |
| Oostkamp to Orvieto | 716.56 mi (1,153.20 km) |
| Oostkamp to Orzinuovi | 502.49 mi (808.68 km) |
| Oostkamp to Osimo | 713.75 mi (1,148.67 km) |
| Oostkamp to Ospitaletto | 497.78 mi (801.10 km) |
| Oostkamp to Ostuni | 993.40 mi (1,598.72 km) |
| Oostkamp to Ottaviano | 891.19 mi (1,434.23 km) |
| Oostkamp to Ovada | 514.91 mi (828.67 km) |
| Oostkamp to Ozieri | 780.62 mi (1,256.28 km) |
| Oostkamp to Paceco | 1,017.11 mi (1,636.89 km) |
| Oostkamp to Pachino | 1,155.85 mi (1,860.16 km) |
