| Redruth to Oerlinghausen | 613.48 mi (987.29 km) |
| Redruth to Oestrich-Winkel | 585.34 mi (942.01 km) |
| Redruth to Offenburg | 603.80 mi (971.73 km) |
| Redruth to Oftersheim | 617.78 mi (994.22 km) |
| Redruth to Ohrdruf | 700.66 mi (1,127.61 km) |
| Redruth to Ohringen | 660.54 mi (1,063.04 km) |
| Redruth to Olbernhau | 814.85 mi (1,311.37 km) |
| Redruth to Olching | 757.96 mi (1,219.81 km) |
| Redruth to Oldenburg | 608.61 mi (979.47 km) |
| Redruth to Oldenburg in Holstein | 734.68 mi (1,182.36 km) |
| Redruth to Olfen | 557.24 mi (896.79 km) |
| Redruth to Olpe | 574.13 mi (923.97 km) |
| Redruth to Olsberg | 602.74 mi (970.02 km) |
| Redruth to Oranienburg | 810.61 mi (1,304.54 km) |
| Redruth to Ortenberg | 629.37 mi (1,012.88 km) |
