| Osimo to Olympia Heights (Florida) | 5,197.21 mi (8,364.09 km) |
| Osimo to Omaha (Nebraska) | 5,130.13 mi (8,256.14 km) |
| Osimo to On Top of the World Designated Place (Florida) | 5,132.01 mi (8,259.17 km) |
| Osimo to Onalaska (Wisconsin) | 4,826.31 mi (7,767.19 km) |
| Osimo to Oneida (New York) | 4,245.94 mi (6,833.18 km) |
| Osimo to Oneonta (New York) | 4,245.21 mi (6,832.01 km) |
| Osimo to Ontario (California) | 6,257.87 mi (10,071.06 km) |
| Osimo to Ontario (Oregon) | 5,663.51 mi (9,114.54 km) |
| Osimo to Opa-locka (Florida) | 5,185.26 mi (8,344.87 km) |
| Osimo to Opelika (Alabama) | 5,106.11 mi (8,217.50 km) |
| Osimo to Opelousas (Louisiana) | 5,494.63 mi (8,842.76 km) |
| Osimo to Orange (California) | 6,278.24 mi (10,103.85 km) |
| Osimo to Orange (Texas) | 5,585.06 mi (8,988.28 km) |
| Osimo to Orange City (Florida) | 5,094.46 mi (8,198.74 km) |
| Osimo to Orangeburg (South Carolina) | 4,870.94 mi (7,839.02 km) |
