| Ercis to Olympia Heights (Florida) | 6,674.44 mi (10,741.48 km) |
| Ercis to Omaha (Nebraska) | 6,329.71 mi (10,186.68 km) |
| Ercis to On Top of the World Designated Place (Florida) | 6,572.06 mi (10,576.71 km) |
| Ercis to Onalaska (Wisconsin) | 6,045.31 mi (9,728.99 km) |
| Ercis to Oneida (New York) | 5,603.00 mi (9,017.16 km) |
| Ercis to Oneonta (New York) | 5,613.30 mi (9,033.73 km) |
| Ercis to Ontario (California) | 7,243.26 mi (11,656.90 km) |
| Ercis to Ontario (Oregon) | 6,568.44 mi (10,570.89 km) |
| Ercis to Opa-locka (Florida) | 6,661.84 mi (10,721.19 km) |
| Ercis to Opelika (Alabama) | 6,493.22 mi (10,449.82 km) |
| Ercis to Opelousas (Louisiana) | 6,842.22 mi (11,011.49 km) |
| Ercis to Orange (California) | 7,262.19 mi (11,687.36 km) |
| Ercis to Orange (Texas) | 6,920.08 mi (11,136.79 km) |
| Ercis to Orange City (Florida) | 6,542.70 mi (10,529.46 km) |
| Ercis to Orangeburg (South Carolina) | 6,285.17 mi (10,115.01 km) |
