| Calexico to Odessa (Texas) | 769.63 mi (1,238.59 km) |
| Calexico to Ogden (Utah) | 621.39 mi (1,000.03 km) |
| Calexico to Oildale (California) | 277.32 mi (446.31 km) |
| Calexico to Ojus (Florida) | 2,168.28 mi (3,489.51 km) |
| Calexico to Okemos (Michigan) | 1,821.90 mi (2,932.07 km) |
| Calexico to Oklahoma City (Oklahoma) | 1,045.29 mi (1,682.23 km) |
| Calexico to Okmulgee (Oklahoma) | 1,130.56 mi (1,819.47 km) |
| Calexico to Olathe (Kansas) | 1,232.02 mi (1,982.74 km) |
| Calexico to Old Jamestown (Missouri) | 1,470.54 mi (2,366.60 km) |
| Calexico to Oldsmar (Florida) | 1,974.83 mi (3,178.18 km) |
| Calexico to Olean (New York) | 2,117.02 mi (3,407.01 km) |
| Calexico to Olive Branch (Mississippi) | 1,476.48 mi (2,376.17 km) |
| Calexico to Olivehurst (California) | 556.81 mi (896.10 km) |
| Calexico to Olney (Maryland) | 2,179.05 mi (3,506.84 km) |
| Calexico to Olympia (Washington) | 1,065.59 mi (1,714.90 km) |
