| Mendrisio to Oberkirch | 189.02 mi (304.20 km) |
| Mendrisio to Obernburg am Main | 274.63 mi (441.97 km) |
| Mendrisio to Obernkirchen | 442.22 mi (711.68 km) |
| Mendrisio to Oberschleissheim | 204.68 mi (329.39 km) |
| Mendrisio to Oberstdorf | 123.06 mi (198.05 km) |
| Mendrisio to Obertraubling | 260.72 mi (419.59 km) |
| Mendrisio to Obertshausen | 290.27 mi (467.15 km) |
| Mendrisio to Oberursel | 300.22 mi (483.15 km) |
| Mendrisio to Ochsenfurt | 266.19 mi (428.40 km) |
| Mendrisio to Ochsenhausen | 159.03 mi (255.93 km) |
| Mendrisio to Ochtrup | 445.40 mi (716.81 km) |
| Mendrisio to Odenthal | 367.05 mi (590.71 km) |
| Mendrisio to Oelde | 413.98 mi (666.24 km) |
| Mendrisio to Oelsnitz | 346.87 mi (558.23 km) |
| Mendrisio to Oer-Erkenschwick | 406.75 mi (654.59 km) |
