| Sinop to Oberkirch | 1,382.00 mi (2,224.11 km) |
| Sinop to Obernburg am Main | 1,352.59 mi (2,176.79 km) |
| Sinop to Obernkirchen | 1,401.92 mi (2,256.18 km) |
| Sinop to Oberschleissheim | 1,221.27 mi (1,965.44 km) |
| Sinop to Oberstdorf | 1,270.22 mi (2,044.22 km) |
| Sinop to Obertraubling | 1,205.93 mi (1,940.76 km) |
| Sinop to Obertshausen | 1,369.60 mi (2,204.16 km) |
| Sinop to Oberursel | 1,382.88 mi (2,225.54 km) |
| Sinop to Ochsenfurt | 1,309.34 mi (2,107.18 km) |
| Sinop to Ochsenhausen | 1,292.32 mi (2,079.79 km) |
| Sinop to Ochtrup | 1,477.89 mi (2,378.43 km) |
| Sinop to Odenthal | 1,458.92 mi (2,347.90 km) |
| Sinop to Oelde | 1,431.26 mi (2,303.38 km) |
| Sinop to Oelsnitz | 1,235.14 mi (1,987.77 km) |
| Sinop to Oer-Erkenschwick | 1,464.29 mi (2,356.55 km) |
