| Piedras Blancas to Oswego (Illinois) | 4,006.05 mi (6,447.12 km) |
| Piedras Blancas to Oswego (New York) | 3,420.76 mi (5,505.18 km) |
| Piedras Blancas to Otsego (Minnesota) | 4,097.43 mi (6,594.18 km) |
| Piedras Blancas to Ottawa (Illinois) | 4,039.54 mi (6,501.01 km) |
| Piedras Blancas to Ottawa (Kansas) | 4,428.18 mi (7,126.46 km) |
| Piedras Blancas to Ottumwa (Iowa) | 4,208.39 mi (6,772.75 km) |
| Piedras Blancas to Overland (Missouri) | 4,208.89 mi (6,773.55 km) |
| Piedras Blancas to Overland Park (Kansas) | 4,391.37 mi (7,067.23 km) |
| Piedras Blancas to Overlea (Maryland) | 3,552.30 mi (5,716.87 km) |
| Piedras Blancas to Oviedo (Florida) | 4,178.44 mi (6,724.55 km) |
| Piedras Blancas to Owasso (Oklahoma) | 4,548.94 mi (7,320.81 km) |
| Piedras Blancas to Owatonna (Minnesota) | 4,125.40 mi (6,639.20 km) |
| Piedras Blancas to Owensboro (Kentucky) | 4,098.87 mi (6,596.49 km) |
| Piedras Blancas to Owings Mills (Maryland) | 3,563.48 mi (5,734.87 km) |
| Piedras Blancas to Owosso (Michigan) | 3,777.15 mi (6,078.74 km) |
