| Conneaut to Olympia Heights (Florida) | 1,119.63 mi (1,801.87 km) |
| Conneaut to Omaha (Nebraska) | 800.33 mi (1,288.01 km) |
| Conneaut to On Top of the World Designated Place (Florida) | 891.09 mi (1,434.07 km) |
| Conneaut to Onalaska (Wisconsin) | 554.75 mi (892.79 km) |
| Conneaut to Oneida (New York) | 262.19 mi (421.95 km) |
| Conneaut to Oneonta (New York) | 283.95 mi (456.97 km) |
| Conneaut to Ontario (California) | 2,071.82 mi (3,334.28 km) |
| Conneaut to Ontario (Oregon) | 1,831.13 mi (2,946.93 km) |
| Conneaut to Opa-locka (Florida) | 1,107.56 mi (1,782.44 km) |
| Conneaut to Opelika (Alabama) | 692.33 mi (1,114.20 km) |
| Conneaut to Opelousas (Louisiana) | 1,014.10 mi (1,632.04 km) |
| Conneaut to Orange (California) | 2,090.13 mi (3,363.73 km) |
| Conneaut to Orange (Texas) | 1,096.76 mi (1,765.06 km) |
| Conneaut to Orange City (Florida) | 898.61 mi (1,446.18 km) |
| Conneaut to Orangeburg (South Carolina) | 583.01 mi (938.26 km) |
