| Rorschach to Olympia Heights (Florida) | 4,922.44 mi (7,921.91 km) |
| Rorschach to Omaha (Nebraska) | 4,803.99 mi (7,731.27 km) |
| Rorschach to On Top of the World Designated Place (Florida) | 4,844.94 mi (7,797.18 km) |
| Rorschach to Onalaska (Wisconsin) | 4,501.06 mi (7,243.75 km) |
| Rorschach to Oneida (New York) | 3,936.99 mi (6,335.97 km) |
| Rorschach to Oneonta (New York) | 3,938.34 mi (6,338.15 km) |
| Rorschach to Ontario (California) | 5,923.11 mi (9,532.33 km) |
| Rorschach to Ontario (Oregon) | 5,327.47 mi (8,573.73 km) |
| Rorschach to Opa-locka (Florida) | 4,910.23 mi (7,902.25 km) |
| Rorschach to Opelika (Alabama) | 4,805.86 mi (7,734.28 km) |
| Rorschach to Opelousas (Louisiana) | 5,187.95 mi (8,349.20 km) |
| Rorschach to Orange (California) | 5,943.48 mi (9,565.10 km) |
| Rorschach to Orange (Texas) | 5,276.53 mi (8,491.76 km) |
| Rorschach to Orange City (Florida) | 4,809.72 mi (7,740.49 km) |
| Rorschach to Orangeburg (South Carolina) | 4,576.23 mi (7,364.73 km) |
