| Caldiran to Oerlinghausen | 1,896.31 mi (3,051.82 km) |
| Caldiran to Oestrich-Winkel | 1,897.37 mi (3,053.53 km) |
| Caldiran to Offenburg | 1,885.76 mi (3,034.83 km) |
| Caldiran to Oftersheim | 1,864.69 mi (3,000.93 km) |
| Caldiran to Ohrdruf | 1,791.02 mi (2,882.38 km) |
| Caldiran to Ohringen | 1,822.10 mi (2,932.39 km) |
| Caldiran to Olbernhau | 1,678.37 mi (2,701.08 km) |
| Caldiran to Olching | 1,729.30 mi (2,783.03 km) |
| Caldiran to Oldenburg | 1,935.28 mi (3,114.53 km) |
| Caldiran to Oldenburg in Holstein | 1,856.30 mi (2,987.43 km) |
| Caldiran to Olfen | 1,945.86 mi (3,131.56 km) |
| Caldiran to Olpe | 1,917.13 mi (3,085.32 km) |
| Caldiran to Olsberg | 1,894.29 mi (3,048.56 km) |
| Caldiran to Oranienburg | 1,728.16 mi (2,781.21 km) |
| Caldiran to Ortenberg | 1,855.81 mi (2,986.64 km) |
