| Cumnock to Olympia Heights (Florida) | 4,234.43 mi (6,814.65 km) |
| Cumnock to Omaha (Nebraska) | 4,007.47 mi (6,449.41 km) |
| Cumnock to On Top of the World Designated Place (Florida) | 4,129.72 mi (6,646.14 km) |
| Cumnock to Onalaska (Wisconsin) | 3,706.46 mi (5,964.97 km) |
| Cumnock to Oneida (New York) | 3,178.21 mi (5,114.84 km) |
| Cumnock to Oneonta (New York) | 3,184.34 mi (5,124.70 km) |
| Cumnock to Ontario (California) | 5,116.11 mi (8,233.58 km) |
| Cumnock to Ontario (Oregon) | 4,524.29 mi (7,281.13 km) |
| Cumnock to Opa-locka (Florida) | 4,221.71 mi (6,794.19 km) |
| Cumnock to Opelika (Alabama) | 4,061.62 mi (6,536.54 km) |
| Cumnock to Opelousas (Louisiana) | 4,428.22 mi (7,126.53 km) |
| Cumnock to Orange (California) | 5,136.47 mi (8,266.36 km) |
| Cumnock to Orange (Texas) | 4,512.68 mi (7,262.46 km) |
| Cumnock to Orange City (Florida) | 4,100.03 mi (6,598.36 km) |
| Cumnock to Orangeburg (South Carolina) | 3,845.77 mi (6,189.17 km) |
