| The Dalles to Nuth | 5,058.55 mi (8,140.96 km) |
| The Dalles to Oegstgeest | 4,951.99 mi (7,969.46 km) |
| The Dalles to Oirschot | 5,011.10 mi (8,064.59 km) |
| The Dalles to Oisterwijk | 5,003.92 mi (8,053.03 km) |
| The Dalles to Oldebroek | 4,973.05 mi (8,003.35 km) |
| The Dalles to Oldenzaal | 5,005.90 mi (8,056.23 km) |
| The Dalles to Ommen | 4,982.02 mi (8,017.79 km) |
| The Dalles to Oosterend | 4,946.17 mi (7,960.09 km) |
| The Dalles to Oosterhout | 4,991.87 mi (8,033.64 km) |
| The Dalles to Oosterwolde | 4,952.39 mi (7,970.11 km) |
| The Dalles to Oostzaan | 4,948.65 mi (7,964.09 km) |
| The Dalles to Opmeer | 4,935.53 mi (7,942.96 km) |
| The Dalles to Oss | 5,001.69 mi (8,049.44 km) |
| The Dalles to Oud-Beijerland | 4,970.58 mi (7,999.38 km) |
| The Dalles to Oudenbosch | 4,986.36 mi (8,024.77 km) |
