| Cologne to Octeville | 389.91 mi (627.50 km) |
| Cologne to Oignies | 176.21 mi (283.59 km) |
| Cologne to Oissel | 281.87 mi (453.63 km) |
| Cologne to Olivet | 310.79 mi (500.17 km) |
| Cologne to Ollioules | 541.21 mi (871.00 km) |
| Cologne to Olonne-sur-Mer | 499.98 mi (804.64 km) |
| Cologne to Oloron-Sainte-Marie | 641.70 mi (1,032.71 km) |
| Cologne to Onet Village | 497.05 mi (799.93 km) |
| Cologne to Onnaing | 151.72 mi (244.18 km) |
| Cologne to Orange | 480.17 mi (772.75 km) |
| Cologne to Orchies | 165.36 mi (266.13 km) |
| Cologne to Orleans | 308.63 mi (496.70 km) |
| Cologne to Orly | 253.37 mi (407.76 km) |
| Cologne to Ormesson-sur-Marne | 246.39 mi (396.52 km) |
| Cologne to Orsay | 262.68 mi (422.75 km) |
