| Bad Honnef am Rhein to Octeville | 398.82 mi (641.83 km) |
| Bad Honnef am Rhein to Oignies | 186.19 mi (299.65 km) |
| Bad Honnef am Rhein to Oissel | 286.91 mi (461.74 km) |
| Bad Honnef am Rhein to Olivet | 307.47 mi (494.83 km) |
| Bad Honnef am Rhein to Ollioules | 522.64 mi (841.11 km) |
| Bad Honnef am Rhein to Olonne-sur-Mer | 499.21 mi (803.40 km) |
| Bad Honnef am Rhein to Oloron-Sainte-Marie | 633.02 mi (1,018.75 km) |
| Bad Honnef am Rhein to Onet Village | 484.54 mi (779.79 km) |
| Bad Honnef am Rhein to Onnaing | 160.40 mi (258.13 km) |
| Bad Honnef am Rhein to Orange | 463.50 mi (745.93 km) |
| Bad Honnef am Rhein to Orchies | 175.19 mi (281.94 km) |
| Bad Honnef am Rhein to Orleans | 305.45 mi (491.57 km) |
| Bad Honnef am Rhein to Orly | 252.78 mi (406.80 km) |
| Bad Honnef am Rhein to Ormesson-sur-Marne | 245.65 mi (395.33 km) |
| Bad Honnef am Rhein to Orsay | 262.35 mi (422.21 km) |
