| Saint-Omer to Oestrich-Winkel | 258.06 mi (415.31 km) |
| Saint-Omer to Offenburg | 298.80 mi (480.88 km) |
| Saint-Omer to Oftersheim | 296.11 mi (476.54 km) |
| Saint-Omer to Ohrdruf | 369.90 mi (595.29 km) |
| Saint-Omer to Ohringen | 338.84 mi (545.30 km) |
| Saint-Omer to Olbernhau | 484.06 mi (779.02 km) |
| Saint-Omer to Olching | 442.68 mi (712.43 km) |
| Saint-Omer to Oldenburg | 302.63 mi (487.04 km) |
| Saint-Omer to Oldenburg in Holstein | 437.26 mi (703.70 km) |
| Saint-Omer to Olfen | 231.44 mi (372.47 km) |
| Saint-Omer to Olpe | 243.56 mi (391.98 km) |
| Saint-Omer to Olsberg | 273.37 mi (439.95 km) |
| Saint-Omer to Oranienburg | 488.97 mi (786.91 km) |
| Saint-Omer to Ortenberg | 299.40 mi (481.84 km) |
| Saint-Omer to Oschatz | 472.48 mi (760.38 km) |
