| Forest Grove to Nuth | 5,111.62 mi (8,226.35 km) |
| Forest Grove to Oegstgeest | 5,005.02 mi (8,054.81 km) |
| Forest Grove to Oirschot | 5,064.11 mi (8,149.90 km) |
| Forest Grove to Oisterwijk | 5,056.93 mi (8,138.34 km) |
| Forest Grove to Oldebroek | 5,024.85 mi (8,086.72 km) |
| Forest Grove to Oldenzaal | 5,057.08 mi (8,138.58 km) |
| Forest Grove to Ommen | 5,033.40 mi (8,100.48 km) |
| Forest Grove to Oosterend | 4,997.40 mi (8,042.53 km) |
| Forest Grove to Oosterhout | 5,045.08 mi (8,119.26 km) |
| Forest Grove to Oosterwolde | 5,003.47 mi (8,052.31 km) |
| Forest Grove to Oostzaan | 5,001.19 mi (8,048.63 km) |
| Forest Grove to Opmeer | 4,987.79 mi (8,027.07 km) |
| Forest Grove to Oss | 5,054.32 mi (8,134.15 km) |
| Forest Grove to Oud-Beijerland | 5,023.97 mi (8,085.29 km) |
| Forest Grove to Oudenbosch | 5,039.84 mi (8,110.84 km) |
