| Olhao to Nuth | 1,173.50 mi (1,888.57 km) |
| Olhao to Oegstgeest | 1,205.91 mi (1,940.73 km) |
| Olhao to Oirschot | 1,188.83 mi (1,913.24 km) |
| Olhao to Oisterwijk | 1,190.76 mi (1,916.34 km) |
| Olhao to Oldebroek | 1,256.40 mi (2,021.99 km) |
| Olhao to Oldenzaal | 1,276.46 mi (2,054.27 km) |
| Olhao to Ommen | 1,273.41 mi (2,049.35 km) |
| Olhao to Oosterend | 1,291.11 mi (2,077.84 km) |
| Olhao to Oosterhout | 1,185.21 mi (1,907.41 km) |
| Olhao to Oosterwolde | 1,296.02 mi (2,085.74 km) |
| Olhao to Oostzaan | 1,230.14 mi (1,979.72 km) |
| Olhao to Opmeer | 1,246.85 mi (2,006.61 km) |
| Olhao to Oss | 1,209.08 mi (1,945.83 km) |
| Olhao to Oud-Beijerland | 1,183.50 mi (1,904.66 km) |
| Olhao to Oudenbosch | 1,173.77 mi (1,889.00 km) |
