| Sidmouth to Oerlinghausen | 521.08 mi (838.60 km) |
| Sidmouth to Oestrich-Winkel | 497.35 mi (800.40 km) |
| Sidmouth to Offenburg | 522.82 mi (841.40 km) |
| Sidmouth to Oftersheim | 531.98 mi (856.14 km) |
| Sidmouth to Ohrdruf | 609.91 mi (981.55 km) |
| Sidmouth to Ohringen | 574.87 mi (925.17 km) |
| Sidmouth to Olbernhau | 724.14 mi (1,165.39 km) |
| Sidmouth to Olching | 674.79 mi (1,085.97 km) |
| Sidmouth to Oldenburg | 516.29 mi (830.89 km) |
| Sidmouth to Oldenburg in Holstein | 643.21 mi (1,035.15 km) |
| Sidmouth to Olfen | 465.01 mi (748.37 km) |
| Sidmouth to Olpe | 483.12 mi (777.51 km) |
| Sidmouth to Olsberg | 511.09 mi (822.52 km) |
| Sidmouth to Oranienburg | 718.00 mi (1,155.51 km) |
| Sidmouth to Ortenberg | 539.96 mi (868.98 km) |
