| Front Royal to Olympia Heights (Florida) | 920.72 mi (1,481.76 km) |
| Front Royal to Omaha (Nebraska) | 956.40 mi (1,539.18 km) |
| Front Royal to On Top of the World Designated Place (Florida) | 717.81 mi (1,155.21 km) |
| Front Royal to Onalaska (Wisconsin) | 755.81 mi (1,216.36 km) |
| Front Royal to Oneida (New York) | 315.46 mi (507.69 km) |
| Front Royal to Oneonta (New York) | 293.42 mi (472.22 km) |
| Front Royal to Ontario (California) | 2,198.66 mi (3,538.39 km) |
| Front Royal to Ontario (Oregon) | 2,019.68 mi (3,250.35 km) |
| Front Royal to Opa-locka (Florida) | 908.03 mi (1,461.33 km) |
| Front Royal to Opelika (Alabama) | 591.09 mi (951.27 km) |
| Front Royal to Opelousas (Louisiana) | 977.78 mi (1,573.58 km) |
| Front Royal to Orange (California) | 2,215.95 mi (3,566.22 km) |
| Front Royal to Orange (Texas) | 1,072.81 mi (1,726.52 km) |
| Front Royal to Orange City (Florida) | 712.76 mi (1,147.08 km) |
| Front Royal to Orangeburg (South Carolina) | 404.05 mi (650.25 km) |
