| Koropi to Oerlinghausen | 1,218.66 mi (1,961.24 km) |
| Koropi to Oestrich-Winkel | 1,145.28 mi (1,843.16 km) |
| Koropi to Offenburg | 1,081.35 mi (1,740.27 km) |
| Koropi to Oftersheim | 1,097.12 mi (1,765.64 km) |
| Koropi to Ohrdruf | 1,100.61 mi (1,771.27 km) |
| Koropi to Ohringen | 1,058.35 mi (1,703.25 km) |
| Koropi to Olbernhau | 1,022.34 mi (1,645.29 km) |
| Koropi to Olching | 950.65 mi (1,529.92 km) |
| Koropi to Oldenburg | 1,291.58 mi (2,078.59 km) |
| Koropi to Oldenburg in Holstein | 1,288.09 mi (2,072.97 km) |
| Koropi to Olfen | 1,244.96 mi (2,003.56 km) |
| Koropi to Olpe | 1,197.66 mi (1,927.45 km) |
| Koropi to Olsberg | 1,193.44 mi (1,920.66 km) |
| Koropi to Oranienburg | 1,146.23 mi (1,844.67 km) |
| Koropi to Ortenberg | 1,127.43 mi (1,814.42 km) |
