| Thessaloniki to Olympia Heights (Florida) | 5,719.32 mi (9,204.36 km) |
| Thessaloniki to Omaha (Nebraska) | 5,609.84 mi (9,028.16 km) |
| Thessaloniki to On Top of the World Designated Place (Florida) | 5,651.37 mi (9,095.00 km) |
| Thessaloniki to Onalaska (Wisconsin) | 5,308.40 mi (8,543.04 km) |
| Thessaloniki to Oneida (New York) | 4,752.12 mi (7,647.80 km) |
| Thessaloniki to Oneonta (New York) | 4,753.25 mi (7,649.62 km) |
| Thessaloniki to Ontario (California) | 6,698.19 mi (10,779.70 km) |
| Thessaloniki to Ontario (Oregon) | 6,078.87 mi (9,783.00 km) |
| Thessaloniki to Opa-locka (Florida) | 5,707.35 mi (9,185.08 km) |
| Thessaloniki to Opelika (Alabama) | 5,619.20 mi (9,043.23 km) |
| Thessaloniki to Opelousas (Louisiana) | 6,002.94 mi (9,660.79 km) |
| Thessaloniki to Orange (California) | 6,718.41 mi (10,812.24 km) |
| Thessaloniki to Orange (Texas) | 6,091.69 mi (9,803.62 km) |
| Thessaloniki to Orange City (Florida) | 5,614.53 mi (9,035.71 km) |
| Thessaloniki to Orangeburg (South Carolina) | 5,387.12 mi (8,669.73 km) |
