| Watertown Town to Nuth | 3,533.48 mi (5,686.58 km) |
| Watertown Town to Oegstgeest | 3,444.80 mi (5,543.88 km) |
| Watertown Town to Oirschot | 3,494.97 mi (5,624.62 km) |
| Watertown Town to Oisterwijk | 3,488.87 mi (5,614.79 km) |
| Watertown Town to Oldebroek | 3,494.79 mi (5,624.32 km) |
| Watertown Town to Oldenzaal | 3,538.70 mi (5,694.98 km) |
| Watertown Town to Ommen | 3,513.36 mi (5,654.20 km) |
| Watertown Town to Oosterend | 3,487.54 mi (5,612.65 km) |
| Watertown Town to Oosterhout | 3,473.65 mi (5,590.30 km) |
| Watertown Town to Oosterwolde | 3,496.60 mi (5,627.23 km) |
| Watertown Town to Oostzaan | 3,455.20 mi (5,560.61 km) |
| Watertown Town to Opmeer | 3,451.36 mi (5,554.43 km) |
| Watertown Town to Oss | 3,496.85 mi (5,627.63 km) |
| Watertown Town to Oud-Beijerland | 3,451.10 mi (5,554.00 km) |
| Watertown Town to Oudenbosch | 3,461.67 mi (5,571.02 km) |
