| Greenock to Oschatz | 796.74 mi (1,282.24 km) |
| Greenock to Oschersleben | 703.07 mi (1,131.48 km) |
| Greenock to Osnabruck | 576.34 mi (927.54 km) |
| Greenock to Ostbevern | 577.94 mi (930.11 km) |
| Greenock to Osterburg | 698.50 mi (1,124.13 km) |
| Greenock to Ostercappeln | 580.63 mi (934.44 km) |
| Greenock to Osterhofen | 898.58 mi (1,446.13 km) |
| Greenock to Osterholz-Scharmbeck | 573.91 mi (923.63 km) |
| Greenock to Osternienburg | 738.90 mi (1,189.14 km) |
| Greenock to Osterode | 676.30 mi (1,088.40 km) |
| Greenock to Osterwieck | 684.99 mi (1,102.39 km) |
| Greenock to Ostfildern | 771.20 mi (1,241.12 km) |
| Greenock to Osthofen | 694.36 mi (1,117.47 km) |
| Greenock to Ostrhauderfehn | 532.67 mi (857.25 km) |
| Greenock to Ostringen | 730.15 mi (1,175.06 km) |
