| Saint Helens to Oerlinghausen | 488.22 mi (785.71 km) |
| Saint Helens to Oestrich-Winkel | 517.44 mi (832.74 km) |
| Saint Helens to Offenburg | 577.57 mi (929.51 km) |
| Saint Helens to Oftersheim | 563.04 mi (906.12 km) |
| Saint Helens to Ohrdruf | 598.69 mi (963.50 km) |
| Saint Helens to Ohringen | 603.82 mi (971.75 km) |
| Saint Helens to Olbernhau | 708.08 mi (1,139.54 km) |
| Saint Helens to Olching | 711.28 mi (1,144.70 km) |
| Saint Helens to Oldenburg | 452.80 mi (728.71 km) |
| Saint Helens to Oldenburg in Holstein | 557.55 mi (897.29 km) |
| Saint Helens to Olfen | 441.51 mi (710.55 km) |
| Saint Helens to Olpe | 477.80 mi (768.94 km) |
| Saint Helens to Olsberg | 494.68 mi (796.11 km) |
| Saint Helens to Oranienburg | 663.52 mi (1,067.83 km) |
| Saint Helens to Ortenberg | 545.95 mi (878.62 km) |
