| Montegranaro to Olympia Heights (Florida) | 5,210.59 mi (8,385.64 km) |
| Montegranaro to Omaha (Nebraska) | 5,147.38 mi (8,283.90 km) |
| Montegranaro to On Top of the World Designated Place (Florida) | 5,146.25 mi (8,282.08 km) |
| Montegranaro to Onalaska (Wisconsin) | 4,843.48 mi (7,794.83 km) |
| Montegranaro to Oneida (New York) | 4,261.82 mi (6,858.73 km) |
| Montegranaro to Oneonta (New York) | 4,260.94 mi (6,857.31 km) |
| Montegranaro to Ontario (California) | 6,276.07 mi (10,100.35 km) |
| Montegranaro to Ontario (Oregon) | 5,682.07 mi (9,144.42 km) |
| Montegranaro to Opa-locka (Florida) | 5,198.67 mi (8,366.45 km) |
| Montegranaro to Opelika (Alabama) | 5,121.30 mi (8,241.93 km) |
| Montegranaro to Opelousas (Louisiana) | 5,510.27 mi (8,867.92 km) |
| Montegranaro to Orange (California) | 6,296.44 mi (10,133.15 km) |
| Montegranaro to Orange (Texas) | 5,600.83 mi (9,013.67 km) |
| Montegranaro to Orange City (Florida) | 5,108.54 mi (8,221.40 km) |
| Montegranaro to Orangeburg (South Carolina) | 4,885.74 mi (7,862.84 km) |
