| Mesolongi to Oberkirch | 967.42 mi (1,556.91 km) |
| Mesolongi to Obernburg am Main | 997.14 mi (1,604.74 km) |
| Mesolongi to Obernkirchen | 1,127.76 mi (1,814.95 km) |
| Mesolongi to Oberschleissheim | 842.23 mi (1,355.44 km) |
| Mesolongi to Oberstdorf | 840.15 mi (1,352.08 km) |
| Mesolongi to Obertraubling | 864.74 mi (1,391.66 km) |
| Mesolongi to Obertshausen | 1,017.94 mi (1,638.22 km) |
| Mesolongi to Oberursel | 1,032.57 mi (1,661.76 km) |
| Mesolongi to Ochsenfurt | 960.12 mi (1,545.16 km) |
| Mesolongi to Ochsenhausen | 883.23 mi (1,421.42 km) |
| Mesolongi to Ochtrup | 1,175.67 mi (1,892.06 km) |
| Mesolongi to Odenthal | 1,118.20 mi (1,799.58 km) |
| Mesolongi to Oelde | 1,129.61 mi (1,817.93 km) |
| Mesolongi to Oelsnitz | 948.02 mi (1,525.69 km) |
| Mesolongi to Oer-Erkenschwick | 1,144.92 mi (1,842.57 km) |
