| Roma to Nuth | 5,420.22 mi (8,723.01 km) |
| Roma to Oegstgeest | 5,325.99 mi (8,571.36 km) |
| Roma to Oirschot | 5,379.14 mi (8,656.89 km) |
| Roma to Oisterwijk | 5,372.68 mi (8,646.49 km) |
| Roma to Oldebroek | 5,371.43 mi (8,644.49 km) |
| Roma to Oldenzaal | 5,414.22 mi (8,713.34 km) |
| Roma to Ommen | 5,388.50 mi (8,671.96 km) |
| Roma to Oosterend | 5,359.83 mi (8,625.82 km) |
| Roma to Oosterhout | 5,357.70 mi (8,622.38 km) |
| Roma to Oosterwolde | 5,368.54 mi (8,639.83 km) |
| Roma to Oostzaan | 5,333.91 mi (8,584.10 km) |
| Roma to Opmeer | 5,328.06 mi (8,574.69 km) |
| Roma to Oss | 5,378.89 mi (8,656.48 km) |
| Roma to Oud-Beijerland | 5,334.83 mi (8,585.59 km) |
| Roma to Oudenbosch | 5,346.65 mi (8,604.60 km) |
