| Opfikon to Noventa Vicentina | 205.10 mi (330.08 km) |
| Opfikon to Novi di Modena | 208.00 mi (334.75 km) |
| Opfikon to Novi Ligure | 185.06 mi (297.82 km) |
| Opfikon to Nuoro | 493.18 mi (793.70 km) |
| Opfikon to Occhiobello | 225.61 mi (363.08 km) |
| Opfikon to Oderzo | 218.51 mi (351.67 km) |
| Opfikon to Oggiono | 119.91 mi (192.98 km) |
| Opfikon to Olbia | 452.61 mi (728.41 km) |
| Opfikon to Oleggio | 126.71 mi (203.92 km) |
| Opfikon to Olgiate Comasco | 115.57 mi (186.00 km) |
| Opfikon to Olgiate Olona | 125.27 mi (201.61 km) |
| Opfikon to Omegna | 107.72 mi (173.36 km) |
| Opfikon to Opera | 144.99 mi (233.33 km) |
| Opfikon to Oppeano | 193.08 mi (310.73 km) |
| Opfikon to Orbassano | 174.70 mi (281.15 km) |
