| Castelginest to Oegstgeest | 603.01 mi (970.46 km) |
| Castelginest to Oirschot | 568.46 mi (914.85 km) |
| Castelginest to Oisterwijk | 572.44 mi (921.26 km) |
| Castelginest to Oldebroek | 638.88 mi (1,028.18 km) |
| Castelginest to Oldenzaal | 647.33 mi (1,041.77 km) |
| Castelginest to Ommen | 651.15 mi (1,047.92 km) |
| Castelginest to Oosterend | 677.17 mi (1,089.80 km) |
| Castelginest to Oosterhout | 571.73 mi (920.11 km) |
| Castelginest to Oosterwolde | 679.59 mi (1,093.70 km) |
| Castelginest to Oostzaan | 624.33 mi (1,004.76 km) |
| Castelginest to Opmeer | 642.82 mi (1,034.51 km) |
| Castelginest to Oss | 588.96 mi (947.84 km) |
| Castelginest to Oud-Beijerland | 577.80 mi (929.88 km) |
| Castelginest to Oudenbosch | 564.06 mi (907.76 km) |
| Castelginest to Oudewater | 596.52 mi (960.01 km) |
