| Watertown to Nuth | 3,652.47 mi (5,878.08 km) |
| Watertown to Oegstgeest | 3,559.55 mi (5,728.54 km) |
| Watertown to Oirschot | 3,611.97 mi (5,812.90 km) |
| Watertown to Oisterwijk | 3,605.59 mi (5,802.64 km) |
| Watertown to Oldebroek | 3,606.40 mi (5,803.94 km) |
| Watertown to Oldenzaal | 3,649.60 mi (5,873.47 km) |
| Watertown to Ommen | 3,623.97 mi (5,832.22 km) |
| Watertown to Oosterend | 3,596.22 mi (5,787.56 km) |
| Watertown to Oosterhout | 3,590.53 mi (5,778.41 km) |
| Watertown to Oosterwolde | 3,605.07 mi (5,801.79 km) |
| Watertown to Oostzaan | 3,568.19 mi (5,742.45 km) |
| Watertown to Opmeer | 3,562.95 mi (5,734.02 km) |
| Watertown to Oss | 3,612.27 mi (5,813.39 km) |
| Watertown to Oud-Beijerland | 3,567.73 mi (5,741.70 km) |
| Watertown to Oudenbosch | 3,579.25 mi (5,760.24 km) |
