| Ardahan to Olympia Heights (Florida) | 6,554.11 mi (10,547.83 km) |
| Ardahan to Omaha (Nebraska) | 6,187.51 mi (9,957.83 km) |
| Ardahan to On Top of the World Designated Place (Florida) | 6,446.72 mi (10,374.99 km) |
| Ardahan to Onalaska (Wisconsin) | 5,904.34 mi (9,502.12 km) |
| Ardahan to Oneida (New York) | 5,471.23 mi (8,805.09 km) |
| Ardahan to Oneonta (New York) | 5,482.42 mi (8,823.10 km) |
| Ardahan to Ontario (California) | 7,095.58 mi (11,419.23 km) |
| Ardahan to Ontario (Oregon) | 6,420.60 mi (10,332.95 km) |
| Ardahan to Opa-locka (Florida) | 6,541.43 mi (10,527.41 km) |
| Ardahan to Opelika (Alabama) | 6,362.37 mi (10,239.24 km) |
| Ardahan to Opelousas (Louisiana) | 6,707.44 mi (10,794.58 km) |
| Ardahan to Orange (California) | 7,114.50 mi (11,449.68 km) |
| Ardahan to Orange (Texas) | 6,784.24 mi (10,918.18 km) |
| Ardahan to Orange City (Florida) | 6,418.45 mi (10,329.50 km) |
| Ardahan to Orangeburg (South Carolina) | 6,157.40 mi (9,909.37 km) |
