| Calexico to Oswego (Illinois) | 1,610.37 mi (2,591.64 km) |
| Calexico to Oswego (New York) | 2,224.22 mi (3,579.53 km) |
| Calexico to Otsego (Minnesota) | 1,453.61 mi (2,339.36 km) |
| Calexico to Ottawa (Illinois) | 1,580.42 mi (2,543.44 km) |
| Calexico to Ottawa (Kansas) | 1,204.12 mi (1,937.85 km) |
| Calexico to Ottumwa (Iowa) | 1,394.12 mi (2,243.63 km) |
| Calexico to Overland (Missouri) | 1,464.53 mi (2,356.94 km) |
| Calexico to Overland Park (Kansas) | 1,239.02 mi (1,994.02 km) |
| Calexico to Overlea (Maryland) | 2,208.62 mi (3,554.43 km) |
| Calexico to Oviedo (Florida) | 2,048.77 mi (3,297.18 km) |
| Calexico to Owasso (Oklahoma) | 1,145.01 mi (1,842.71 km) |
| Calexico to Owatonna (Minnesota) | 1,433.12 mi (2,306.39 km) |
| Calexico to Owensboro (Kentucky) | 1,632.95 mi (2,627.98 km) |
| Calexico to Owings Mills (Maryland) | 2,193.99 mi (3,530.88 km) |
| Calexico to Owosso (Michigan) | 1,837.87 mi (2,957.77 km) |
