| Washington to Opwijk | 360.70 mi (580.49 km) |
| Washington to Ostend | 313.59 mi (504.67 km) |
| Washington to Oud-Heverlee | 381.21 mi (613.50 km) |
| Washington to Oud-Turnhout | 365.86 mi (588.80 km) |
| Washington to Oudenaarde | 351.79 mi (566.15 km) |
| Washington to Oudenburg | 317.98 mi (511.74 km) |
| Washington to Oupeye | 416.03 mi (669.53 km) |
| Washington to Overijse | 380.15 mi (611.80 km) |
| Washington to Overpelt | 384.05 mi (618.06 km) |
| Washington to Paal | 385.33 mi (620.12 km) |
| Washington to Peer | 389.25 mi (626.43 km) |
| Washington to Pepinster | 428.37 mi (689.40 km) |
| Washington to Peruwelz | 370.41 mi (596.12 km) |
| Washington to Perwez | 396.47 mi (638.06 km) |
| Washington to Philippeville | 412.59 mi (664.00 km) |
