| Falls Church to Nuth | 3,929.09 mi (6,323.25 km) |
| Falls Church to Oegstgeest | 3,840.04 mi (6,179.95 km) |
| Falls Church to Oirschot | 3,890.43 mi (6,261.04 km) |
| Falls Church to Oisterwijk | 3,884.30 mi (6,251.17 km) |
| Falls Church to Oldebroek | 3,889.71 mi (6,259.88 km) |
| Falls Church to Oldenzaal | 3,933.54 mi (6,330.43 km) |
| Falls Church to Ommen | 3,908.16 mi (6,289.58 km) |
| Falls Church to Oosterend | 3,882.08 mi (6,247.61 km) |
| Falls Church to Oosterhout | 3,869.09 mi (6,226.70 km) |
| Falls Church to Oosterwolde | 3,891.12 mi (6,262.15 km) |
| Falls Church to Oostzaan | 3,850.27 mi (6,196.40 km) |
| Falls Church to Opmeer | 3,846.27 mi (6,189.97 km) |
| Falls Church to Oss | 3,892.17 mi (6,263.83 km) |
| Falls Church to Oud-Beijerland | 3,846.51 mi (6,190.36 km) |
| Falls Church to Oudenbosch | 3,857.16 mi (6,207.50 km) |
