| Carnot-Moon to Olympia Heights (Florida) | 1,022.24 mi (1,645.13 km) |
| Carnot-Moon to Omaha (Nebraska) | 827.54 mi (1,331.80 km) |
| Carnot-Moon to On Top of the World Designated Place (Florida) | 797.17 mi (1,282.92 km) |
| Carnot-Moon to Onalaska (Wisconsin) | 608.13 mi (978.69 km) |
| Carnot-Moon to Oneida (New York) | 293.70 mi (472.67 km) |
| Carnot-Moon to Oneonta (New York) | 298.23 mi (479.96 km) |
| Carnot-Moon to Ontario (California) | 2,087.34 mi (3,359.25 km) |
| Carnot-Moon to Ontario (Oregon) | 1,879.08 mi (3,024.09 km) |
| Carnot-Moon to Opa-locka (Florida) | 1,010.08 mi (1,625.56 km) |
| Carnot-Moon to Opelika (Alabama) | 613.43 mi (987.22 km) |
| Carnot-Moon to Opelousas (Louisiana) | 958.37 mi (1,542.34 km) |
| Carnot-Moon to Orange (California) | 2,105.18 mi (3,387.96 km) |
| Carnot-Moon to Orange (Texas) | 1,045.91 mi (1,683.24 km) |
| Carnot-Moon to Orange City (Florida) | 802.66 mi (1,291.75 km) |
| Carnot-Moon to Orangeburg (South Carolina) | 486.76 mi (783.36 km) |
