| Fort Drum to Olympia Heights (Florida) | 1,291.36 mi (2,078.24 km) |
| Fort Drum to Omaha (Nebraska) | 1,044.94 mi (1,681.67 km) |
| Fort Drum to On Top of the World Designated Place (Florida) | 1,092.51 mi (1,758.23 km) |
| Fort Drum to Onalaska (Wisconsin) | 765.93 mi (1,232.65 km) |
| Fort Drum to Oneida (New York) | 67.17 mi (108.10 km) |
| Fort Drum to Oneonta (New York) | 115.64 mi (186.10 km) |
| Fort Drum to Ontario (California) | 2,320.71 mi (3,734.83 km) |
| Fort Drum to Ontario (Oregon) | 2,024.26 mi (3,257.73 km) |
| Fort Drum to Opa-locka (Florida) | 1,278.49 mi (2,057.53 km) |
| Fort Drum to Opelika (Alabama) | 941.27 mi (1,514.82 km) |
| Fort Drum to Opelousas (Louisiana) | 1,289.57 mi (2,075.36 km) |
| Fort Drum to Orange (California) | 2,339.56 mi (3,765.15 km) |
| Fort Drum to Orange (Texas) | 1,375.13 mi (2,213.06 km) |
| Fort Drum to Orange City (Florida) | 1,087.18 mi (1,749.65 km) |
| Fort Drum to Orangeburg (South Carolina) | 778.39 mi (1,252.70 km) |
