| Seregno to Olympia Heights (Florida) | 4,947.95 mi (7,962.95 km) |
| Seregno to Omaha (Nebraska) | 4,872.92 mi (7,842.21 km) |
| Seregno to On Top of the World Designated Place (Florida) | 4,878.71 mi (7,851.53 km) |
| Seregno to Onalaska (Wisconsin) | 4,568.87 mi (7,352.88 km) |
| Seregno to Oneida (New York) | 3,987.81 mi (6,417.76 km) |
| Seregno to Oneonta (New York) | 3,987.33 mi (6,416.99 km) |
| Seregno to Ontario (California) | 6,007.56 mi (9,668.24 km) |
| Seregno to Ontario (Oregon) | 5,420.11 mi (8,722.83 km) |
| Seregno to Opa-locka (Florida) | 4,935.91 mi (7,943.57 km) |
| Seregno to Opelika (Alabama) | 4,849.47 mi (7,804.46 km) |
| Seregno to Opelousas (Louisiana) | 5,236.88 mi (8,427.95 km) |
| Seregno to Orange (California) | 6,027.96 mi (9,701.06 km) |
| Seregno to Orange (Texas) | 5,327.07 mi (8,573.09 km) |
| Seregno to Orange City (Florida) | 4,841.86 mi (7,792.22 km) |
| Seregno to Orangeburg (South Carolina) | 4,615.51 mi (7,427.95 km) |
