| West Falls Church to Olympia (Washington) | 2,344.08 mi (3,772.43 km) |
| West Falls Church to Olympia Heights (Florida) | 926.23 mi (1,490.62 km) |
| West Falls Church to Omaha (Nebraska) | 1,009.16 mi (1,624.08 km) |
| West Falls Church to On Top of the World Designated Place (Florida) | 734.49 mi (1,182.05 km) |
| West Falls Church to Onalaska (Wisconsin) | 804.07 mi (1,294.03 km) |
| West Falls Church to Oneida (New York) | 301.70 mi (485.54 km) |
| West Falls Church to Oneonta (New York) | 271.82 mi (437.45 km) |
| West Falls Church to Ontario (California) | 2,252.38 mi (3,624.85 km) |
| West Falls Church to Ontario (Oregon) | 2,070.69 mi (3,332.45 km) |
| West Falls Church to Opa-locka (Florida) | 913.34 mi (1,469.88 km) |
| West Falls Church to Opelika (Alabama) | 627.59 mi (1,010.00 km) |
| West Falls Church to Opelousas (Louisiana) | 1,021.51 mi (1,643.96 km) |
| West Falls Church to Orange (California) | 2,269.67 mi (3,652.68 km) |
| West Falls Church to Orange (Texas) | 1,117.74 mi (1,798.83 km) |
| West Falls Church to Orange City (Florida) | 725.04 mi (1,166.84 km) |
