| Euskirchen to Novi di Modena | 441.57 mi (710.64 km) |
| Euskirchen to Novi Ligure | 418.05 mi (672.78 km) |
| Euskirchen to Nuoro | 725.04 mi (1,166.84 km) |
| Euskirchen to Occhiobello | 454.32 mi (731.16 km) |
| Euskirchen to Oderzo | 426.95 mi (687.11 km) |
| Euskirchen to Oggiono | 356.86 mi (574.31 km) |
| Euskirchen to Olbia | 685.58 mi (1,103.33 km) |
| Euskirchen to Oleggio | 359.73 mi (578.93 km) |
| Euskirchen to Olgiate Comasco | 351.45 mi (565.60 km) |
| Euskirchen to Olgiate Olona | 360.39 mi (579.99 km) |
| Euskirchen to Omegna | 338.60 mi (544.93 km) |
| Euskirchen to Opera | 381.34 mi (613.71 km) |
| Euskirchen to Oppeano | 422.18 mi (679.44 km) |
| Euskirchen to Orbassano | 392.06 mi (630.97 km) |
| Euskirchen to Orbetello | 605.29 mi (974.12 km) |
