| Elk City to Olympia Heights (Florida) | 1,314.00 mi (2,114.68 km) |
| Elk City to Omaha (Nebraska) | 445.29 mi (716.62 km) |
| Elk City to On Top of the World Designated Place (Florida) | 1,089.76 mi (1,753.79 km) |
| Elk City to Onalaska (Wisconsin) | 731.64 mi (1,177.46 km) |
| Elk City to Oneida (New York) | 1,372.52 mi (2,208.85 km) |
| Elk City to Oneonta (New York) | 1,391.79 mi (2,239.87 km) |
| Elk City to Ontario (California) | 1,035.06 mi (1,665.77 km) |
| Elk City to Ontario (Oregon) | 1,103.79 mi (1,776.38 km) |
| Elk City to Opa-locka (Florida) | 1,311.34 mi (2,110.40 km) |
| Elk City to Opelika (Alabama) | 825.69 mi (1,328.83 km) |
| Elk City to Opelousas (Louisiana) | 542.21 mi (872.60 km) |
| Elk City to Orange (California) | 1,050.23 mi (1,690.18 km) |
| Elk City to Orange (Texas) | 490.50 mi (789.39 km) |
| Elk City to Orange City (Florida) | 1,148.67 mi (1,848.61 km) |
| Elk City to Orangeburg (South Carolina) | 1,064.24 mi (1,712.73 km) |
