| Watertown to Noventa Vicentina | 4,072.17 mi (6,553.53 km) |
| Watertown to Novi di Modena | 4,060.90 mi (6,535.38 km) |
| Watertown to Novi Ligure | 3,978.30 mi (6,402.46 km) |
| Watertown to Nuoro | 4,169.58 mi (6,710.29 km) |
| Watertown to Occhiobello | 4,087.76 mi (6,578.61 km) |
| Watertown to Oderzo | 4,092.36 mi (6,586.02 km) |
| Watertown to Oggiono | 3,964.39 mi (6,380.06 km) |
| Watertown to Olbia | 4,153.45 mi (6,684.34 km) |
| Watertown to Oleggio | 3,941.51 mi (6,343.25 km) |
| Watertown to Olgiate Comasco | 3,948.64 mi (6,354.73 km) |
| Watertown to Olgiate Olona | 3,950.62 mi (6,357.91 km) |
| Watertown to Omegna | 3,922.21 mi (6,312.19 km) |
| Watertown to Opera | 3,973.42 mi (6,394.61 km) |
| Watertown to Oppeano | 4,057.25 mi (6,529.52 km) |
| Watertown to Orbassano | 3,917.24 mi (6,304.19 km) |
