| Castilleja de la Cuesta to Olympia Heights (Florida) | 4,337.87 mi (6,981.13 km) |
| Castilleja de la Cuesta to Omaha (Nebraska) | 4,587.62 mi (7,383.07 km) |
| Castilleja de la Cuesta to On Top of the World Designated Place (Florida) | 4,323.90 mi (6,958.64 km) |
| Castilleja de la Cuesta to Onalaska (Wisconsin) | 4,284.79 mi (6,895.70 km) |
| Castilleja de la Cuesta to Oneida (New York) | 3,586.82 mi (5,772.42 km) |
| Castilleja de la Cuesta to Oneonta (New York) | 3,572.19 mi (5,748.88 km) |
| Castilleja de la Cuesta to Ontario (California) | 5,830.08 mi (9,382.61 km) |
| Castilleja de la Cuesta to Ontario (Oregon) | 5,348.82 mi (8,608.09 km) |
| Castilleja de la Cuesta to Opa-locka (Florida) | 4,327.21 mi (6,963.97 km) |
| Castilleja de la Cuesta to Opelika (Alabama) | 4,363.71 mi (7,022.72 km) |
| Castilleja de la Cuesta to Opelousas (Louisiana) | 4,778.54 mi (7,690.32 km) |
| Castilleja de la Cuesta to Orange (California) | 5,850.15 mi (9,414.91 km) |
| Castilleja de la Cuesta to Orange (Texas) | 4,878.03 mi (7,850.44 km) |
| Castilleja de la Cuesta to Orange City (Florida) | 4,277.22 mi (6,883.52 km) |
| Castilleja de la Cuesta to Orangeburg (South Carolina) | 4,106.21 mi (6,608.31 km) |
