| Montechiarugolo to Olympia Heights (Florida) | 5,025.65 mi (8,088.01 km) |
| Montechiarugolo to Omaha (Nebraska) | 4,961.06 mi (7,984.05 km) |
| Montechiarugolo to On Top of the World Designated Place (Florida) | 4,959.16 mi (7,981.00 km) |
| Montechiarugolo to Onalaska (Wisconsin) | 4,656.89 mi (7,494.54 km) |
| Montechiarugolo to Oneida (New York) | 4,072.96 mi (6,554.80 km) |
| Montechiarugolo to Oneonta (New York) | 4,072.08 mi (6,553.38 km) |
| Montechiarugolo to Ontario (California) | 6,096.51 mi (9,811.39 km) |
| Montechiarugolo to Ontario (Oregon) | 5,508.57 mi (8,865.18 km) |
| Montechiarugolo to Opa-locka (Florida) | 5,013.67 mi (8,068.73 km) |
| Montechiarugolo to Opelika (Alabama) | 4,932.74 mi (7,938.47 km) |
| Montechiarugolo to Opelousas (Louisiana) | 5,321.43 mi (8,564.01 km) |
| Montechiarugolo to Orange (California) | 6,116.91 mi (9,844.21 km) |
| Montechiarugolo to Orange (Texas) | 5,411.97 mi (8,709.73 km) |
| Montechiarugolo to Orange City (Florida) | 4,921.80 mi (7,920.87 km) |
| Montechiarugolo to Orangeburg (South Carolina) | 4,697.65 mi (7,560.14 km) |
