| Gardnerville Ranchos to Olympia Heights (Florida) | 2,451.82 mi (3,945.82 km) |
| Gardnerville Ranchos to Omaha (Nebraska) | 1,259.40 mi (2,026.82 km) |
| Gardnerville Ranchos to On Top of the World Designated Place (Florida) | 2,232.27 mi (3,592.50 km) |
| Gardnerville Ranchos to Onalaska (Wisconsin) | 1,510.99 mi (2,431.71 km) |
| Gardnerville Ranchos to Oneida (New York) | 2,290.85 mi (3,686.77 km) |
| Gardnerville Ranchos to Oneonta (New York) | 2,327.21 mi (3,745.29 km) |
| Gardnerville Ranchos to Ontario (California) | 356.01 mi (572.94 km) |
| Gardnerville Ranchos to Ontario (Oregon) | 382.38 mi (615.38 km) |
| Gardnerville Ranchos to Opa-locka (Florida) | 2,449.91 mi (3,942.74 km) |
| Gardnerville Ranchos to Opelika (Alabama) | 1,962.03 mi (3,157.58 km) |
| Gardnerville Ranchos to Opelousas (Louisiana) | 1,666.56 mi (2,682.07 km) |
| Gardnerville Ranchos to Orange (California) | 367.78 mi (591.88 km) |
| Gardnerville Ranchos to Orange (Texas) | 1,591.94 mi (2,561.98 km) |
| Gardnerville Ranchos to Orange City (Florida) | 2,291.18 mi (3,687.30 km) |
| Gardnerville Ranchos to Orangeburg (South Carolina) | 2,183.17 mi (3,513.46 km) |
