| Sinop to Noventa Vicentina | 1,197.37 mi (1,926.98 km) |
| Sinop to Novi di Modena | 1,227.47 mi (1,975.42 km) |
| Sinop to Novi Ligure | 1,331.17 mi (2,142.30 km) |
| Sinop to Nuoro | 1,342.83 mi (2,161.08 km) |
| Sinop to Occhiobello | 1,194.22 mi (1,921.91 km) |
| Sinop to Oderzo | 1,153.20 mi (1,855.90 km) |
| Sinop to Oggiono | 1,304.35 mi (2,099.15 km) |
| Sinop to Olbia | 1,325.21 mi (2,132.71 km) |
| Sinop to Oleggio | 1,338.56 mi (2,154.21 km) |
| Sinop to Olgiate Comasco | 1,322.81 mi (2,128.86 km) |
| Sinop to Olgiate Olona | 1,326.53 mi (2,134.85 km) |
| Sinop to Omegna | 1,349.95 mi (2,172.54 km) |
| Sinop to Opera | 1,310.04 mi (2,108.30 km) |
| Sinop to Oppeano | 1,214.41 mi (1,954.41 km) |
| Sinop to Orbassano | 1,391.91 mi (2,240.07 km) |
