| Hafnarfjordhur to Oegstgeest | 1,248.89 mi (2,009.89 km) |
| Hafnarfjordhur to Oirschot | 1,307.98 mi (2,104.99 km) |
| Hafnarfjordhur to Oisterwijk | 1,300.80 mi (2,093.43 km) |
| Hafnarfjordhur to Oldebroek | 1,273.35 mi (2,049.25 km) |
| Hafnarfjordhur to Oldenzaal | 1,308.67 mi (2,106.11 km) |
| Hafnarfjordhur to Ommen | 1,283.99 mi (2,066.39 km) |
| Hafnarfjordhur to Oosterend | 1,249.03 mi (2,010.12 km) |
| Hafnarfjordhur to Oosterhout | 1,288.44 mi (2,073.55 km) |
| Hafnarfjordhur to Oosterwolde | 1,255.93 mi (2,021.23 km) |
| Hafnarfjordhur to Oostzaan | 1,246.68 mi (2,006.34 km) |
| Hafnarfjordhur to Opmeer | 1,234.36 mi (1,986.52 km) |
| Hafnarfjordhur to Oss | 1,299.35 mi (2,091.11 km) |
| Hafnarfjordhur to Oud-Beijerland | 1,266.92 mi (2,038.92 km) |
| Hafnarfjordhur to Oudenbosch | 1,282.57 mi (2,064.10 km) |
| Hafnarfjordhur to Oudewater | 1,268.51 mi (2,041.47 km) |
