| Monserrato to Oegstgeest | 921.22 mi (1,482.57 km) |
| Monserrato to Oirschot | 866.46 mi (1,394.43 km) |
| Monserrato to Oisterwijk | 873.08 mi (1,405.09 km) |
| Monserrato to Oldebroek | 925.10 mi (1,488.80 km) |
| Monserrato to Oldenzaal | 909.00 mi (1,462.90 km) |
| Monserrato to Ommen | 925.84 mi (1,490.00 km) |
| Monserrato to Oosterend | 961.45 mi (1,547.31 km) |
| Monserrato to Oosterhout | 880.81 mi (1,417.52 km) |
| Monserrato to Oosterwolde | 958.98 mi (1,543.33 km) |
| Monserrato to Oostzaan | 933.32 mi (1,502.03 km) |
| Monserrato to Opmeer | 950.52 mi (1,529.71 km) |
| Monserrato to Oss | 882.24 mi (1,419.83 km) |
| Monserrato to Oud-Beijerland | 897.70 mi (1,444.71 km) |
| Monserrato to Oudenbosch | 881.12 mi (1,418.03 km) |
| Monserrato to Oudewater | 905.63 mi (1,457.47 km) |
