| Castellaneta to Oegstgeest | 991.82 mi (1,596.17 km) |
| Castellaneta to Oirschot | 932.86 mi (1,501.29 km) |
| Castellaneta to Oisterwijk | 940.02 mi (1,512.82 km) |
| Castellaneta to Oldebroek | 967.91 mi (1,557.70 km) |
| Castellaneta to Oldenzaal | 935.07 mi (1,504.84 km) |
| Castellaneta to Ommen | 958.83 mi (1,543.09 km) |
| Castellaneta to Oosterend | 994.77 mi (1,600.92 km) |
| Castellaneta to Oosterhout | 952.85 mi (1,533.47 km) |
| Castellaneta to Oosterwolde | 988.67 mi (1,591.11 km) |
| Castellaneta to Oostzaan | 993.52 mi (1,598.92 km) |
| Castellaneta to Opmeer | 1,006.02 mi (1,619.04 km) |
| Castellaneta to Oss | 940.90 mi (1,514.24 km) |
| Castellaneta to Oud-Beijerland | 974.87 mi (1,568.89 km) |
| Castellaneta to Oudenbosch | 959.71 mi (1,544.50 km) |
| Castellaneta to Oudewater | 971.99 mi (1,564.26 km) |
