| Fort Lewis to Olympia Heights (Florida) | 2,726.45 mi (4,387.79 km) |
| Fort Lewis to Omaha (Nebraska) | 1,366.67 mi (2,199.44 km) |
| Fort Lewis to On Top of the World Designated Place (Florida) | 2,480.24 mi (3,991.55 km) |
| Fort Lewis to Onalaska (Wisconsin) | 1,524.53 mi (2,453.49 km) |
| Fort Lewis to Oneida (New York) | 2,270.32 mi (3,653.72 km) |
| Fort Lewis to Oneonta (New York) | 2,315.45 mi (3,726.35 km) |
| Fort Lewis to Ontario (California) | 938.41 mi (1,510.23 km) |
| Fort Lewis to Ontario (Oregon) | 343.58 mi (552.93 km) |
| Fort Lewis to Opa-locka (Florida) | 2,721.79 mi (4,380.30 km) |
| Fort Lewis to Opelika (Alabama) | 2,182.22 mi (3,511.94 km) |
| Fort Lewis to Opelousas (Louisiana) | 1,980.88 mi (3,187.93 km) |
| Fort Lewis to Orange (California) | 951.18 mi (1,530.78 km) |
| Fort Lewis to Orange (Texas) | 1,929.32 mi (3,104.95 km) |
| Fort Lewis to Orange City (Florida) | 2,533.36 mi (4,077.05 km) |
| Fort Lewis to Orangeburg (South Carolina) | 2,355.77 mi (3,791.24 km) |
