| Cornelius to Olympia Heights (Florida) | 674.32 mi (1,085.21 km) |
| Cornelius to Omaha (Nebraska) | 912.34 mi (1,468.27 km) |
| Cornelius to On Top of the World Designated Place (Florida) | 447.46 mi (720.13 km) |
| Cornelius to Onalaska (Wisconsin) | 798.52 mi (1,285.10 km) |
| Cornelius to Oneida (New York) | 594.66 mi (957.02 km) |
| Cornelius to Oneonta (New York) | 574.42 mi (924.44 km) |
| Cornelius to Ontario (California) | 2,075.07 mi (3,339.50 km) |
| Cornelius to Ontario (Oregon) | 1,988.51 mi (3,200.20 km) |
| Cornelius to Opa-locka (Florida) | 662.45 mi (1,066.11 km) |
| Cornelius to Opelika (Alabama) | 322.32 mi (518.73 km) |
| Cornelius to Opelousas (Louisiana) | 732.86 mi (1,179.42 km) |
| Cornelius to Orange (California) | 2,090.89 mi (3,364.96 km) |
| Cornelius to Orange (Texas) | 833.40 mi (1,341.24 km) |
| Cornelius to Orange City (Florida) | 452.33 mi (727.95 km) |
| Cornelius to Orangeburg (South Carolina) | 136.78 mi (220.13 km) |
