| Castalla to Oswego (Illinois) | 4,420.85 mi (7,114.67 km) |
| Castalla to Oswego (New York) | 3,827.34 mi (6,159.51 km) |
| Castalla to Otsego (Minnesota) | 4,524.89 mi (7,282.11 km) |
| Castalla to Ottawa (Illinois) | 4,454.06 mi (7,168.12 km) |
| Castalla to Ottawa (Kansas) | 4,843.84 mi (7,795.41 km) |
| Castalla to Ottumwa (Iowa) | 4,626.17 mi (7,445.10 km) |
| Castalla to Overland (Missouri) | 4,618.48 mi (7,432.73 km) |
| Castalla to Overland Park (Kansas) | 4,806.97 mi (7,736.08 km) |
| Castalla to Overlea (Maryland) | 3,944.10 mi (6,347.41 km) |
| Castalla to Oviedo (Florida) | 4,536.55 mi (7,300.87 km) |
| Castalla to Owasso (Oklahoma) | 4,960.00 mi (7,982.36 km) |
| Castalla to Owatonna (Minnesota) | 4,550.39 mi (7,323.15 km) |
| Castalla to Owensboro (Kentucky) | 4,501.25 mi (7,244.05 km) |
| Castalla to Owings Mills (Maryland) | 3,955.89 mi (6,366.38 km) |
| Castalla to Owosso (Michigan) | 4,190.81 mi (6,744.45 km) |
