| Middelkerke to Oestrich-Winkel | 241.47 mi (388.61 km) |
| Middelkerke to Offenburg | 295.23 mi (475.12 km) |
| Middelkerke to Oftersheim | 283.65 mi (456.50 km) |
| Middelkerke to Ohrdruf | 344.76 mi (554.84 km) |
| Middelkerke to Ohringen | 325.63 mi (524.04 km) |
| Middelkerke to Olbernhau | 458.91 mi (738.54 km) |
| Middelkerke to Olching | 431.81 mi (694.92 km) |
| Middelkerke to Oldenburg | 265.60 mi (427.45 km) |
| Middelkerke to Oldenburg in Holstein | 399.77 mi (643.37 km) |
| Middelkerke to Olfen | 199.89 mi (321.70 km) |
| Middelkerke to Olpe | 217.82 mi (350.54 km) |
| Middelkerke to Olsberg | 245.07 mi (394.40 km) |
| Middelkerke to Oranienburg | 456.07 mi (733.98 km) |
| Middelkerke to Ortenberg | 278.36 mi (447.98 km) |
| Middelkerke to Oschatz | 444.71 mi (715.69 km) |
