| Mersin to Oberkirch | 1,561.73 mi (2,513.36 km) |
| Mersin to Obernburg am Main | 1,553.99 mi (2,500.91 km) |
| Mersin to Obernkirchen | 1,634.26 mi (2,630.08 km) |
| Mersin to Oberschleissheim | 1,407.37 mi (2,264.94 km) |
| Mersin to Oberstdorf | 1,438.73 mi (2,315.41 km) |
| Mersin to Obertraubling | 1,405.38 mi (2,261.75 km) |
| Mersin to Obertshausen | 1,573.13 mi (2,531.72 km) |
| Mersin to Oberursel | 1,587.46 mi (2,554.77 km) |
| Mersin to Ochsenfurt | 1,511.13 mi (2,431.93 km) |
| Mersin to Ochsenhausen | 1,470.34 mi (2,366.28 km) |
| Mersin to Ochtrup | 1,703.37 mi (2,741.31 km) |
| Mersin to Odenthal | 1,669.94 mi (2,687.51 km) |
| Mersin to Oelde | 1,655.26 mi (2,663.88 km) |
| Mersin to Oelsnitz | 1,455.51 mi (2,342.42 km) |
| Mersin to Oer-Erkenschwick | 1,683.23 mi (2,708.90 km) |
