| Santa Monica to Oskaloosa (Iowa) | 1,493.27 mi (2,403.18 km) |
| Santa Monica to Oswego (Illinois) | 1,717.35 mi (2,763.81 km) |
| Santa Monica to Oswego (New York) | 2,327.51 mi (3,745.77 km) |
| Santa Monica to Otsego (Minnesota) | 1,524.58 mi (2,453.58 km) |
| Santa Monica to Ottawa (Illinois) | 1,689.18 mi (2,718.48 km) |
| Santa Monica to Ottawa (Kansas) | 1,326.84 mi (2,135.34 km) |
| Santa Monica to Ottumwa (Iowa) | 1,501.07 mi (2,415.74 km) |
| Santa Monica to Overland (Missouri) | 1,590.57 mi (2,559.78 km) |
| Santa Monica to Overland Park (Kansas) | 1,360.03 mi (2,188.76 km) |
| Santa Monica to Overlea (Maryland) | 2,332.79 mi (3,754.26 km) |
| Santa Monica to Oviedo (Florida) | 2,219.41 mi (3,571.79 km) |
| Santa Monica to Owasso (Oklahoma) | 1,286.05 mi (2,069.69 km) |
| Santa Monica to Owatonna (Minnesota) | 1,514.30 mi (2,437.03 km) |
| Santa Monica to Owensboro (Kentucky) | 1,766.06 mi (2,842.20 km) |
| Santa Monica to Owings Mills (Maryland) | 2,317.97 mi (3,730.40 km) |
