| Watertown Town to Opole | 4,013.93 mi (6,459.79 km) |
| Watertown Town to Orzesze | 4,062.90 mi (6,538.60 km) |
| Watertown Town to Osowa | 3,909.23 mi (6,291.30 km) |
| Watertown Town to Ostroda | 3,986.49 mi (6,415.63 km) |
| Watertown Town to Ostroleka | 4,065.44 mi (6,542.70 km) |
| Watertown Town to Ostrow Mazowiecka | 4,086.77 mi (6,577.02 km) |
| Watertown Town to Ostrow Wielkopolski | 3,976.36 mi (6,399.34 km) |
| Watertown Town to Ostrowiec Swietokrzyski | 4,135.08 mi (6,654.77 km) |
| Watertown Town to Ostrzeszow | 3,988.56 mi (6,418.96 km) |
| Watertown Town to Oswiecim | 4,084.83 mi (6,573.90 km) |
| Watertown Town to Otwock | 4,087.98 mi (6,578.98 km) |
| Watertown Town to Ozarow Mazowiecki | 4,067.44 mi (6,545.91 km) |
| Watertown Town to Ozimek | 4,024.36 mi (6,476.59 km) |
| Watertown Town to Ozorkow | 4,020.32 mi (6,470.08 km) |
| Watertown Town to Pabianice | 4,034.88 mi (6,493.51 km) |
