| Upper Grand Lagoon to Nuth | 4,698.16 mi (7,560.96 km) |
| Upper Grand Lagoon to Oegstgeest | 4,610.51 mi (7,419.89 km) |
| Upper Grand Lagoon to Oirschot | 4,660.18 mi (7,499.84 km) |
| Upper Grand Lagoon to Oisterwijk | 4,654.14 mi (7,490.11 km) |
| Upper Grand Lagoon to Oldebroek | 4,660.95 mi (7,501.07 km) |
| Upper Grand Lagoon to Oldenzaal | 4,704.93 mi (7,571.85 km) |
| Upper Grand Lagoon to Ommen | 4,679.63 mi (7,531.14 km) |
| Upper Grand Lagoon to Oosterend | 4,654.00 mi (7,489.89 km) |
| Upper Grand Lagoon to Oosterhout | 4,638.90 mi (7,465.59 km) |
| Upper Grand Lagoon to Oosterwolde | 4,663.08 mi (7,504.50 km) |
| Upper Grand Lagoon to Oostzaan | 4,621.19 mi (7,437.09 km) |
| Upper Grand Lagoon to Opmeer | 4,617.54 mi (7,431.22 km) |
| Upper Grand Lagoon to Oss | 4,662.39 mi (7,503.39 km) |
| Upper Grand Lagoon to Oud-Beijerland | 4,616.42 mi (7,429.41 km) |
| Upper Grand Lagoon to Oudenbosch | 4,626.77 mi (7,446.07 km) |
