| Mendrisio to Oerlinghausen | 421.71 mi (678.68 km) |
| Mendrisio to Oestrich-Winkel | 289.18 mi (465.39 km) |
| Mendrisio to Offenburg | 186.29 mi (299.80 km) |
| Mendrisio to Oftersheim | 242.81 mi (390.76 km) |
| Mendrisio to Ohrdruf | 352.06 mi (566.59 km) |
| Mendrisio to Ohringen | 231.56 mi (372.67 km) |
| Mendrisio to Olbernhau | 387.16 mi (623.08 km) |
| Mendrisio to Olching | 195.08 mi (313.95 km) |
| Mendrisio to Oldenburg | 503.98 mi (811.08 km) |
| Mendrisio to Oldenburg in Holstein | 588.68 mi (947.40 km) |
| Mendrisio to Olfen | 410.68 mi (660.92 km) |
| Mendrisio to Olpe | 359.70 mi (578.88 km) |
| Mendrisio to Olsberg | 379.54 mi (610.82 km) |
| Mendrisio to Oranienburg | 512.79 mi (825.26 km) |
| Mendrisio to Ortenberg | 310.18 mi (499.19 km) |
