| Bad Neuenahr-Ahrweiler to Octeville | 393.10 mi (632.64 km) |
| Bad Neuenahr-Ahrweiler to Oignies | 181.08 mi (291.42 km) |
| Bad Neuenahr-Ahrweiler to Oissel | 280.27 mi (451.05 km) |
| Bad Neuenahr-Ahrweiler to Olivet | 299.35 mi (481.76 km) |
| Bad Neuenahr-Ahrweiler to Ollioules | 515.12 mi (829.01 km) |
| Bad Neuenahr-Ahrweiler to Olonne-sur-Mer | 491.37 mi (790.78 km) |
| Bad Neuenahr-Ahrweiler to Oloron-Sainte-Marie | 624.50 mi (1,005.04 km) |
| Bad Neuenahr-Ahrweiler to Onet Village | 476.08 mi (766.17 km) |
| Bad Neuenahr-Ahrweiler to Onnaing | 154.96 mi (249.39 km) |
| Bad Neuenahr-Ahrweiler to Orange | 455.53 mi (733.10 km) |
| Bad Neuenahr-Ahrweiler to Orchies | 170.06 mi (273.68 km) |
| Bad Neuenahr-Ahrweiler to Orleans | 297.34 mi (478.52 km) |
| Bad Neuenahr-Ahrweiler to Orly | 245.05 mi (394.37 km) |
| Bad Neuenahr-Ahrweiler to Ormesson-sur-Marne | 237.91 mi (382.87 km) |
| Bad Neuenahr-Ahrweiler to Orsay | 254.66 mi (409.84 km) |
