| Gladbeck to Novi di Modena | 495.18 mi (796.91 km) |
| Gladbeck to Novi Ligure | 477.72 mi (768.82 km) |
| Gladbeck to Nuoro | 785.46 mi (1,264.08 km) |
| Gladbeck to Occhiobello | 505.60 mi (813.68 km) |
| Gladbeck to Oderzo | 472.33 mi (760.14 km) |
| Gladbeck to Oggiono | 414.06 mi (666.37 km) |
| Gladbeck to Olbia | 745.61 mi (1,199.95 km) |
| Gladbeck to Oleggio | 419.21 mi (674.65 km) |
| Gladbeck to Olgiate Comasco | 409.84 mi (659.57 km) |
| Gladbeck to Olgiate Olona | 419.17 mi (674.58 km) |
| Gladbeck to Omegna | 398.47 mi (641.27 km) |
| Gladbeck to Opera | 439.43 mi (707.19 km) |
| Gladbeck to Oppeano | 473.98 mi (762.79 km) |
| Gladbeck to Orbassano | 453.96 mi (730.58 km) |
| Gladbeck to Orbetello | 661.31 mi (1,064.28 km) |
