| Calexico to Orangevale (California) | 524.45 mi (844.02 km) |
| Calexico to Orchards (Washington) | 973.34 mi (1,566.43 km) |
| Calexico to Orcutt (California) | 320.67 mi (516.07 km) |
| Calexico to Oregon (Ohio) | 1,858.10 mi (2,990.33 km) |
| Calexico to Oregon (Wisconsin) | 1,582.08 mi (2,546.11 km) |
| Calexico to Oregon City (Oregon) | 952.96 mi (1,533.64 km) |
| Calexico to Orem (Utah) | 566.53 mi (911.74 km) |
| Calexico to Orinda (California) | 520.32 mi (837.37 km) |
| Calexico to Orland Park (Illinois) | 1,633.00 mi (2,628.07 km) |
| Calexico to Orlando (Florida) | 2,043.64 mi (3,288.92 km) |
| Calexico to Ormond Beach (Florida) | 2,041.60 mi (3,285.63 km) |
| Calexico to Oro Valley (Arizona) | 263.72 mi (424.41 km) |
| Calexico to Oroville (California) | 579.78 mi (933.07 km) |
| Calexico to Oshkosh (Wisconsin) | 1,645.54 mi (2,648.24 km) |
| Calexico to Oskaloosa (Iowa) | 1,388.78 mi (2,235.02 km) |
