| Koyulhisar to Oerlinghausen | 1,596.32 mi (2,569.03 km) |
| Koyulhisar to Oestrich-Winkel | 1,586.48 mi (2,553.19 km) |
| Koyulhisar to Offenburg | 1,567.99 mi (2,523.43 km) |
| Koyulhisar to Oftersheim | 1,551.17 mi (2,496.37 km) |
| Koyulhisar to Ohrdruf | 1,486.71 mi (2,392.63 km) |
| Koyulhisar to Ohringen | 1,508.33 mi (2,427.42 km) |
| Koyulhisar to Olbernhau | 1,376.20 mi (2,214.79 km) |
| Koyulhisar to Olching | 1,412.00 mi (2,272.40 km) |
| Koyulhisar to Oldenburg | 1,641.68 mi (2,642.03 km) |
| Koyulhisar to Oldenburg in Holstein | 1,573.93 mi (2,532.99 km) |
| Koyulhisar to Olfen | 1,643.28 mi (2,644.61 km) |
| Koyulhisar to Olpe | 1,611.21 mi (2,593.00 km) |
| Koyulhisar to Olsberg | 1,590.69 mi (2,559.96 km) |
| Koyulhisar to Oranienburg | 1,439.47 mi (2,316.61 km) |
| Koyulhisar to Ortenberg | 1,547.43 mi (2,490.34 km) |
