| Mendrisio to Octeville | 557.17 mi (896.68 km) |
| Mendrisio to Oignies | 420.81 mi (677.22 km) |
| Mendrisio to Oissel | 438.77 mi (706.12 km) |
| Mendrisio to Olivet | 361.75 mi (582.19 km) |
| Mendrisio to Ollioules | 243.67 mi (392.15 km) |
| Mendrisio to Olonne-sur-Mer | 516.04 mi (830.49 km) |
| Mendrisio to Oloron-Sainte-Marie | 506.76 mi (815.55 km) |
| Mendrisio to Onet Village | 328.24 mi (528.26 km) |
| Mendrisio to Onnaing | 398.85 mi (641.89 km) |
| Mendrisio to Orange | 236.25 mi (380.21 km) |
| Mendrisio to Orchies | 413.63 mi (665.68 km) |
| Mendrisio to Orleans | 362.30 mi (583.07 km) |
| Mendrisio to Orly | 367.03 mi (590.69 km) |
| Mendrisio to Ormesson-sur-Marne | 362.83 mi (583.92 km) |
| Mendrisio to Orsay | 373.60 mi (601.25 km) |
