| Castilleja de la Cuesta to Oakley (California) | 5,811.05 mi (9,351.99 km) |
| Castilleja de la Cuesta to Oakton (Virginia) | 3,769.20 mi (6,065.94 km) |
| Castilleja de la Cuesta to Oakville (Missouri) | 4,416.31 mi (7,107.36 km) |
| Castilleja de la Cuesta to Oatfield (Oregon) | 5,489.35 mi (8,834.25 km) |
| Castilleja de la Cuesta to Ocala (Florida) | 4,314.32 mi (6,943.23 km) |
| Castilleja de la Cuesta to Ocean Acres (New Jersey) | 3,597.33 mi (5,789.34 km) |
| Castilleja de la Cuesta to Ocean City (New Jersey) | 3,625.05 mi (5,833.96 km) |
| Castilleja de la Cuesta to Ocean Pines (Maryland) | 3,674.85 mi (5,914.10 km) |
| Castilleja de la Cuesta to Ocean Pointe (Hawaii) | 7,990.22 mi (12,859.02 km) |
| Castilleja de la Cuesta to Ocean Springs (Mississippi) | 4,615.36 mi (7,427.71 km) |
| Castilleja de la Cuesta to Oceanside (California) | 5,855.00 mi (9,422.71 km) |
| Castilleja de la Cuesta to Oceanside (New York) | 3,544.19 mi (5,703.82 km) |
| Castilleja de la Cuesta to Ocoee (Florida) | 4,302.23 mi (6,923.78 km) |
| Castilleja de la Cuesta to Oconomowoc (Wisconsin) | 4,186.04 mi (6,736.79 km) |
| Castilleja de la Cuesta to Odenton (Maryland) | 3,734.34 mi (6,009.84 km) |
