| Keskin to Oerlinghausen | 1,459.30 mi (2,348.51 km) |
| Keskin to Oestrich-Winkel | 1,433.17 mi (2,306.46 km) |
| Keskin to Offenburg | 1,403.20 mi (2,258.23 km) |
| Keskin to Oftersheim | 1,393.94 mi (2,243.33 km) |
| Keskin to Ohrdruf | 1,344.81 mi (2,164.27 km) |
| Keskin to Ohringen | 1,351.12 mi (2,174.42 km) |
| Keskin to Olbernhau | 1,239.20 mi (1,994.31 km) |
| Keskin to Olching | 1,249.68 mi (2,011.16 km) |
| Keskin to Oldenburg | 1,512.86 mi (2,434.72 km) |
| Keskin to Oldenburg in Holstein | 1,460.58 mi (2,350.57 km) |
| Keskin to Olfen | 1,501.99 mi (2,417.22 km) |
| Keskin to Olpe | 1,465.36 mi (2,358.27 km) |
| Keskin to Olsberg | 1,448.52 mi (2,331.17 km) |
| Keskin to Oranienburg | 1,320.29 mi (2,124.80 km) |
| Keskin to Ortenberg | 1,398.53 mi (2,250.71 km) |
