| Riva del Garda to Olympia Heights (Florida) | 5,018.03 mi (8,075.74 km) |
| Riva del Garda to Omaha (Nebraska) | 4,923.32 mi (7,923.32 km) |
| Riva del Garda to On Top of the World Designated Place (Florida) | 4,945.89 mi (7,959.63 km) |
| Riva del Garda to Onalaska (Wisconsin) | 4,619.90 mi (7,435.01 km) |
| Riva del Garda to Oneida (New York) | 4,047.70 mi (6,514.15 km) |
| Riva del Garda to Oneonta (New York) | 4,048.08 mi (6,514.75 km) |
| Riva del Garda to Ontario (California) | 6,047.66 mi (9,732.77 km) |
| Riva del Garda to Ontario (Oregon) | 5,453.62 mi (8,776.75 km) |
| Riva del Garda to Opa-locka (Florida) | 5,005.93 mi (8,056.26 km) |
| Riva del Garda to Opelika (Alabama) | 4,912.71 mi (7,906.24 km) |
| Riva del Garda to Opelousas (Louisiana) | 5,297.82 mi (8,526.01 km) |
| Riva del Garda to Orange (California) | 6,068.03 mi (9,765.56 km) |
| Riva del Garda to Orange (Texas) | 5,387.27 mi (8,669.97 km) |
| Riva del Garda to Orange City (Florida) | 4,909.63 mi (7,901.28 km) |
| Riva del Garda to Orangeburg (South Carolina) | 4,680.52 mi (7,532.57 km) |
