| Watertown Town to Noventa Vicentina | 3,937.39 mi (6,336.61 km) |
| Watertown Town to Novi di Modena | 3,923.50 mi (6,314.26 km) |
| Watertown Town to Novi Ligure | 3,836.85 mi (6,174.81 km) |
| Watertown Town to Nuoro | 4,012.15 mi (6,456.93 km) |
| Watertown Town to Occhiobello | 3,951.62 mi (6,359.51 km) |
| Watertown Town to Oderzo | 3,961.18 mi (6,374.90 km) |
| Watertown Town to Oggiono | 3,828.01 mi (6,160.58 km) |
| Watertown Town to Olbia | 3,998.50 mi (6,434.96 km) |
| Watertown Town to Oleggio | 3,803.22 mi (6,120.69 km) |
| Watertown Town to Olgiate Comasco | 3,811.64 mi (6,134.25 km) |
| Watertown Town to Olgiate Olona | 3,812.87 mi (6,136.22 km) |
| Watertown Town to Omegna | 3,784.70 mi (6,090.88 km) |
| Watertown Town to Opera | 3,835.20 mi (6,172.15 km) |
| Watertown Town to Oppeano | 3,921.95 mi (6,311.77 km) |
| Watertown Town to Orbassano | 3,774.75 mi (6,074.88 km) |
