| Moore to Olympia Heights (Florida) | 1,213.96 mi (1,953.68 km) |
| Moore to Omaha (Nebraska) | 417.14 mi (671.32 km) |
| Moore to On Top of the World Designated Place (Florida) | 984.99 mi (1,585.19 km) |
| Moore to Onalaska (Wisconsin) | 678.50 mi (1,091.95 km) |
| Moore to Oneida (New York) | 1,279.74 mi (2,059.54 km) |
| Moore to Oneonta (New York) | 1,296.84 mi (2,087.06 km) |
| Moore to Ontario (California) | 1,145.23 mi (1,843.07 km) |
| Moore to Ontario (Oregon) | 1,194.06 mi (1,921.66 km) |
| Moore to Opa-locka (Florida) | 1,210.82 mi (1,948.63 km) |
| Moore to Opelika (Alabama) | 716.63 mi (1,153.31 km) |
| Moore to Opelousas (Louisiana) | 455.95 mi (733.78 km) |
| Moore to Orange (California) | 1,160.35 mi (1,867.41 km) |
| Moore to Orange (Texas) | 419.49 mi (675.10 km) |
| Moore to Orange City (Florida) | 1,043.33 mi (1,679.07 km) |
| Moore to Orangeburg (South Carolina) | 954.04 mi (1,535.38 km) |
