| Mandello del Lario to Olympia Heights (Florida) | 4,947.50 mi (7,962.23 km) |
| Mandello del Lario to Omaha (Nebraska) | 4,865.48 mi (7,830.23 km) |
| Mandello del Lario to On Top of the World Designated Place (Florida) | 4,876.96 mi (7,848.71 km) |
| Mandello del Lario to Onalaska (Wisconsin) | 4,561.59 mi (7,341.17 km) |
| Mandello del Lario to Oneida (New York) | 3,983.27 mi (6,410.46 km) |
| Mandello del Lario to Oneonta (New York) | 3,983.09 mi (6,410.17 km) |
| Mandello del Lario to Ontario (California) | 5,997.52 mi (9,652.07 km) |
| Mandello del Lario to Ontario (Oregon) | 5,408.59 mi (8,704.29 km) |
| Mandello del Lario to Opa-locka (Florida) | 4,935.43 mi (7,942.80 km) |
| Mandello del Lario to Opelika (Alabama) | 4,846.15 mi (7,799.13 km) |
| Mandello del Lario to Opelousas (Louisiana) | 5,232.74 mi (8,421.29 km) |
| Mandello del Lario to Orange (California) | 6,017.91 mi (9,684.89 km) |
| Mandello del Lario to Orange (Texas) | 5,322.67 mi (8,566.02 km) |
| Mandello del Lario to Orange City (Florida) | 4,840.36 mi (7,789.81 km) |
| Mandello del Lario to Orangeburg (South Carolina) | 4,612.87 mi (7,423.70 km) |
