| Gelsenkirchen to Novi di Modena | 489.78 mi (788.23 km) |
| Gelsenkirchen to Novi Ligure | 473.29 mi (761.68 km) |
| Gelsenkirchen to Nuoro | 781.16 mi (1,257.15 km) |
| Gelsenkirchen to Occhiobello | 499.96 mi (804.61 km) |
| Gelsenkirchen to Oderzo | 466.25 mi (750.36 km) |
| Gelsenkirchen to Oggiono | 409.18 mi (658.52 km) |
| Gelsenkirchen to Olbia | 741.21 mi (1,192.87 km) |
| Gelsenkirchen to Oleggio | 414.75 mi (667.47 km) |
| Gelsenkirchen to Olgiate Comasco | 405.16 mi (652.05 km) |
| Gelsenkirchen to Olgiate Olona | 414.56 mi (667.17 km) |
| Gelsenkirchen to Omegna | 394.10 mi (634.25 km) |
| Gelsenkirchen to Opera | 434.69 mi (699.56 km) |
| Gelsenkirchen to Oppeano | 468.40 mi (753.82 km) |
| Gelsenkirchen to Orbassano | 450.20 mi (724.53 km) |
| Gelsenkirchen to Orbetello | 656.19 mi (1,056.03 km) |
