| Gourock to Oschatz | 798.76 mi (1,285.48 km) |
| Gourock to Oschersleben | 705.08 mi (1,134.72 km) |
| Gourock to Osnabruck | 578.33 mi (930.73 km) |
| Gourock to Ostbevern | 579.91 mi (933.28 km) |
| Gourock to Osterburg | 700.54 mi (1,127.41 km) |
| Gourock to Ostercappeln | 582.62 mi (937.64 km) |
| Gourock to Osterhofen | 900.51 mi (1,449.24 km) |
| Gourock to Osterholz-Scharmbeck | 575.94 mi (926.89 km) |
| Gourock to Osternienburg | 740.92 mi (1,192.39 km) |
| Gourock to Osterode | 678.29 mi (1,091.61 km) |
| Gourock to Osterwieck | 687.00 mi (1,105.63 km) |
| Gourock to Ostfildern | 773.01 mi (1,244.05 km) |
| Gourock to Osthofen | 696.21 mi (1,120.44 km) |
| Gourock to Ostrhauderfehn | 534.68 mi (860.49 km) |
| Gourock to Ostringen | 731.97 mi (1,178.00 km) |
