| Dale City to Olympia Heights (Florida) | 909.75 mi (1,464.09 km) |
| Dale City to Omaha (Nebraska) | 1,005.07 mi (1,617.51 km) |
| Dale City to On Top of the World Designated Place (Florida) | 717.28 mi (1,154.35 km) |
| Dale City to Onalaska (Wisconsin) | 804.39 mi (1,294.55 km) |
| Dale City to Oneida (New York) | 318.43 mi (512.46 km) |
| Dale City to Oneonta (New York) | 289.00 mi (465.10 km) |
| Dale City to Ontario (California) | 2,245.03 mi (3,613.03 km) |
| Dale City to Ontario (Oregon) | 2,068.74 mi (3,329.31 km) |
| Dale City to Opa-locka (Florida) | 896.87 mi (1,443.38 km) |
| Dale City to Opelika (Alabama) | 611.37 mi (983.90 km) |
| Dale City to Opelousas (Louisiana) | 1,006.68 mi (1,620.09 km) |
| Dale City to Orange (California) | 2,262.24 mi (3,640.73 km) |
| Dale City to Orange (Texas) | 1,103.25 mi (1,775.50 km) |
| Dale City to Orange City (Florida) | 708.01 mi (1,139.44 km) |
| Dale City to Orangeburg (South Carolina) | 406.74 mi (654.58 km) |
