| Formigine to Olympia Heights (Florida) | 5,051.31 mi (8,129.30 km) |
| Formigine to Omaha (Nebraska) | 4,983.96 mi (8,020.91 km) |
| Formigine to On Top of the World Designated Place (Florida) | 4,984.57 mi (8,021.89 km) |
| Formigine to Onalaska (Wisconsin) | 4,679.90 mi (7,531.57 km) |
| Formigine to Oneida (New York) | 4,097.44 mi (6,594.19 km) |
| Formigine to Oneonta (New York) | 4,096.67 mi (6,592.96 km) |
| Formigine to Ontario (California) | 6,117.37 mi (9,844.96 km) |
| Formigine to Ontario (Oregon) | 5,527.95 mi (8,896.37 km) |
| Formigine to Opa-locka (Florida) | 5,039.33 mi (8,110.01 km) |
| Formigine to Opelika (Alabama) | 4,957.70 mi (7,978.65 km) |
| Formigine to Opelousas (Louisiana) | 5,346.09 mi (8,603.70 km) |
| Formigine to Orange (California) | 6,137.77 mi (9,877.78 km) |
| Formigine to Orange (Texas) | 5,436.53 mi (8,749.25 km) |
| Formigine to Orange City (Florida) | 4,947.27 mi (7,961.86 km) |
| Formigine to Orangeburg (South Carolina) | 4,722.82 mi (7,600.65 km) |
