| Chios to Olympia Heights (Florida) | 5,944.55 mi (9,566.83 km) |
| Chios to Omaha (Nebraska) | 5,839.94 mi (9,398.47 km) |
| Chios to On Top of the World Designated Place (Florida) | 5,879.64 mi (9,462.36 km) |
| Chios to Onalaska (Wisconsin) | 5,538.86 mi (8,913.93 km) |
| Chios to Oneida (New York) | 4,983.65 mi (8,020.41 km) |
| Chios to Oneonta (New York) | 4,984.62 mi (8,021.98 km) |
| Chios to Ontario (California) | 6,920.35 mi (11,137.22 km) |
| Chios to Ontario (Oregon) | 6,295.38 mi (10,131.43 km) |
| Chios to Opa-locka (Florida) | 5,932.65 mi (9,547.68 km) |
| Chios to Opelika (Alabama) | 5,849.87 mi (9,414.45 km) |
| Chios to Opelousas (Louisiana) | 6,234.34 mi (10,033.20 km) |
| Chios to Orange (California) | 6,940.51 mi (11,169.68 km) |
| Chios to Orange (Texas) | 6,323.23 mi (10,176.26 km) |
| Chios to Orange City (Florida) | 5,842.28 mi (9,402.24 km) |
| Chios to Orangeburg (South Carolina) | 5,616.91 mi (9,039.54 km) |
