| Penzance to Oerlinghausen | 629.02 mi (1,012.30 km) |
| Penzance to Oestrich-Winkel | 599.70 mi (965.12 km) |
| Penzance to Offenburg | 616.75 mi (992.56 km) |
| Penzance to Oftersheim | 631.67 mi (1,016.57 km) |
| Penzance to Ohrdruf | 715.66 mi (1,151.74 km) |
| Penzance to Ohringen | 674.38 mi (1,085.31 km) |
| Penzance to Olbernhau | 829.81 mi (1,335.46 km) |
| Penzance to Olching | 771.24 mi (1,241.20 km) |
| Penzance to Oldenburg | 624.48 mi (1,005.01 km) |
| Penzance to Oldenburg in Holstein | 750.62 mi (1,208.00 km) |
| Penzance to Olfen | 572.71 mi (921.69 km) |
| Penzance to Olpe | 589.21 mi (948.24 km) |
| Penzance to Olsberg | 618.01 mi (994.59 km) |
| Penzance to Oranienburg | 826.30 mi (1,329.80 km) |
| Penzance to Ortenberg | 644.05 mi (1,036.49 km) |
