| Euskirchen to Octeville | 380.03 mi (611.59 km) |
| Euskirchen to Oignies | 167.19 mi (269.07 km) |
| Euskirchen to Oissel | 268.95 mi (432.83 km) |
| Euskirchen to Olivet | 293.07 mi (471.65 km) |
| Euskirchen to Ollioules | 521.50 mi (839.28 km) |
| Euskirchen to Olonne-sur-Mer | 483.58 mi (778.24 km) |
| Euskirchen to Oloron-Sainte-Marie | 622.16 mi (1,001.27 km) |
| Euskirchen to Onet Village | 476.78 mi (767.30 km) |
| Euskirchen to Onnaing | 141.53 mi (227.76 km) |
| Euskirchen to Orange | 459.97 mi (740.26 km) |
| Euskirchen to Orchies | 156.19 mi (251.37 km) |
| Euskirchen to Orleans | 290.97 mi (468.27 km) |
| Euskirchen to Orly | 236.92 mi (381.29 km) |
| Euskirchen to Ormesson-sur-Marne | 229.86 mi (369.92 km) |
| Euskirchen to Orsay | 246.39 mi (396.52 km) |
