| Comines to Olympia Heights (Florida) | 4,579.82 mi (7,370.51 km) |
| Comines to Omaha (Nebraska) | 4,432.75 mi (7,133.82 km) |
| Comines to On Top of the World Designated Place (Florida) | 4,493.41 mi (7,231.44 km) |
| Comines to Onalaska (Wisconsin) | 4,129.91 mi (6,646.45 km) |
| Comines to Oneida (New York) | 3,572.27 mi (5,749.01 km) |
| Comines to Oneonta (New York) | 3,574.80 mi (5,753.09 km) |
| Comines to Ontario (California) | 5,555.75 mi (8,941.11 km) |
| Comines to Ontario (Oregon) | 4,966.57 mi (7,992.91 km) |
| Comines to Opa-locka (Florida) | 4,567.42 mi (7,350.55 km) |
| Comines to Opelika (Alabama) | 4,445.62 mi (7,154.53 km) |
| Comines to Opelousas (Louisiana) | 4,823.75 mi (7,763.07 km) |
| Comines to Orange (California) | 5,576.13 mi (8,973.92 km) |
| Comines to Orange (Texas) | 4,911.32 mi (7,904.00 km) |
| Comines to Orange City (Florida) | 4,459.88 mi (7,177.49 km) |
| Comines to Orangeburg (South Carolina) | 4,219.76 mi (6,791.05 km) |
