| Geilenkirchen to Novi di Modena | 474.11 mi (763.00 km) |
| Geilenkirchen to Novi Ligure | 446.18 mi (718.05 km) |
| Geilenkirchen to Nuoro | 751.76 mi (1,209.83 km) |
| Geilenkirchen to Occhiobello | 487.82 mi (785.07 km) |
| Geilenkirchen to Oderzo | 462.12 mi (743.71 km) |
| Geilenkirchen to Oggiono | 387.43 mi (623.51 km) |
| Geilenkirchen to Olbia | 712.84 mi (1,147.20 km) |
| Geilenkirchen to Oleggio | 388.25 mi (624.82 km) |
| Geilenkirchen to Olgiate Comasco | 381.07 mi (613.27 km) |
| Geilenkirchen to Olgiate Olona | 389.62 mi (627.03 km) |
| Geilenkirchen to Omegna | 366.76 mi (590.24 km) |
| Geilenkirchen to Opera | 411.14 mi (661.66 km) |
| Geilenkirchen to Oppeano | 455.54 mi (733.13 km) |
| Geilenkirchen to Orbassano | 416.82 mi (670.81 km) |
| Geilenkirchen to Orbetello | 636.21 mi (1,023.88 km) |
