| Watertown Town to Orangeburg (South Carolina) | 808.22 mi (1,300.71 km) |
| Watertown Town to Orangevale (California) | 2,602.37 mi (4,188.11 km) |
| Watertown Town to Orchards (Washington) | 2,517.37 mi (4,051.32 km) |
| Watertown Town to Orcutt (California) | 2,670.30 mi (4,297.43 km) |
| Watertown Town to Oregon (Ohio) | 630.52 mi (1,014.73 km) |
| Watertown Town to Oregon (Wisconsin) | 924.52 mi (1,487.87 km) |
| Watertown Town to Oregon City (Oregon) | 2,526.05 mi (4,065.29 km) |
| Watertown Town to Orem (Utah) | 2,087.22 mi (3,359.05 km) |
| Watertown Town to Orinda (California) | 2,671.80 mi (4,299.85 km) |
| Watertown Town to Orland Park (Illinois) | 857.08 mi (1,379.33 km) |
| Watertown Town to Orlando (Florida) | 1,115.46 mi (1,795.17 km) |
| Watertown Town to Ormond Beach (Florida) | 1,058.77 mi (1,703.92 km) |
| Watertown Town to Oro Valley (Arizona) | 2,267.07 mi (3,648.50 km) |
| Watertown Town to Oroville (California) | 2,598.79 mi (4,182.34 km) |
| Watertown Town to Oshkosh (Wisconsin) | 881.39 mi (1,418.46 km) |
