| Falls Church to Opwijk | 3,859.23 mi (6,210.82 km) |
| Falls Church to Ostend | 3,801.62 mi (6,118.11 km) |
| Falls Church to Oud-Heverlee | 3,882.21 mi (6,247.81 km) |
| Falls Church to Oud-Turnhout | 3,882.49 mi (6,248.26 km) |
| Falls Church to Oudenaarde | 3,838.52 mi (6,177.50 km) |
| Falls Church to Oudenburg | 3,805.92 mi (6,125.03 km) |
| Falls Church to Oupeye | 3,924.96 mi (6,316.61 km) |
| Falls Church to Overijse | 3,878.10 mi (6,241.19 km) |
| Falls Church to Overpelt | 3,902.45 mi (6,280.39 km) |
| Falls Church to Paal | 3,897.29 mi (6,272.08 km) |
| Falls Church to Peer | 3,906.12 mi (6,286.30 km) |
| Falls Church to Pepinster | 3,935.75 mi (6,333.99 km) |
| Falls Church to Peruwelz | 3,846.24 mi (6,189.93 km) |
| Falls Church to Perwez | 3,893.65 mi (6,266.22 km) |
| Falls Church to Philippeville | 3,893.94 mi (6,266.69 km) |
