| Imperial Beach to Oswego (Illinois) | 1,695.99 mi (2,729.43 km) |
| Imperial Beach to Oswego (New York) | 2,309.36 mi (3,716.55 km) |
| Imperial Beach to Otsego (Minnesota) | 1,528.72 mi (2,460.24 km) |
| Imperial Beach to Ottawa (Illinois) | 1,666.45 mi (2,681.89 km) |
| Imperial Beach to Ottawa (Kansas) | 1,293.00 mi (2,080.88 km) |
| Imperial Beach to Ottumwa (Iowa) | 1,479.50 mi (2,381.02 km) |
| Imperial Beach to Overland (Missouri) | 1,554.38 mi (2,501.53 km) |
| Imperial Beach to Overland Park (Kansas) | 1,327.56 mi (2,136.51 km) |
| Imperial Beach to Overlea (Maryland) | 2,298.51 mi (3,699.09 km) |
| Imperial Beach to Oviedo (Florida) | 2,143.46 mi (3,449.57 km) |
| Imperial Beach to Owasso (Oklahoma) | 1,237.35 mi (1,991.32 km) |
| Imperial Beach to Owatonna (Minnesota) | 1,511.36 mi (2,432.30 km) |
| Imperial Beach to Owensboro (Kentucky) | 1,724.27 mi (2,774.95 km) |
| Imperial Beach to Owings Mills (Maryland) | 2,283.83 mi (3,675.48 km) |
| Imperial Beach to Owosso (Michigan) | 1,922.44 mi (3,093.87 km) |
