| Domodossola to Olympia Heights (Florida) | 4,896.43 mi (7,880.05 km) |
| Domodossola to Omaha (Nebraska) | 4,818.70 mi (7,754.95 km) |
| Domodossola to On Top of the World Designated Place (Florida) | 4,826.16 mi (7,766.95 km) |
| Domodossola to Onalaska (Wisconsin) | 4,514.62 mi (7,265.58 km) |
| Domodossola to Oneida (New York) | 3,933.82 mi (6,330.87 km) |
| Domodossola to Oneonta (New York) | 3,933.44 mi (6,330.26 km) |
| Domodossola to Ontario (California) | 5,954.39 mi (9,582.66 km) |
| Domodossola to Ontario (Oregon) | 5,368.19 mi (8,639.26 km) |
| Domodossola to Opa-locka (Florida) | 4,884.37 mi (7,860.63 km) |
| Domodossola to Opelika (Alabama) | 4,795.97 mi (7,718.37 km) |
| Domodossola to Opelousas (Louisiana) | 5,183.03 mi (8,341.29 km) |
| Domodossola to Orange (California) | 5,974.79 mi (9,615.49 km) |
| Domodossola to Orange (Texas) | 5,273.13 mi (8,486.28 km) |
| Domodossola to Orange City (Florida) | 4,789.49 mi (7,707.94 km) |
| Domodossola to Orangeburg (South Carolina) | 4,562.38 mi (7,342.44 km) |
