| Imperial Beach to Orangevale (California) | 481.34 mi (774.64 km) |
| Imperial Beach to Orchards (Washington) | 951.18 mi (1,530.78 km) |
| Imperial Beach to Orcutt (California) | 247.58 mi (398.43 km) |
| Imperial Beach to Oregon (Ohio) | 1,944.86 mi (3,129.94 km) |
| Imperial Beach to Oregon (Wisconsin) | 1,665.06 mi (2,679.66 km) |
| Imperial Beach to Oregon City (Oregon) | 929.64 mi (1,496.10 km) |
| Imperial Beach to Orem (Utah) | 612.79 mi (986.18 km) |
| Imperial Beach to Orinda (California) | 464.88 mi (748.15 km) |
| Imperial Beach to Orland Park (Illinois) | 1,718.89 mi (2,766.28 km) |
| Imperial Beach to Orlando (Florida) | 2,138.29 mi (3,441.25 km) |
| Imperial Beach to Ormond Beach (Florida) | 2,136.37 mi (3,438.16 km) |
| Imperial Beach to Oro Valley (Arizona) | 357.99 mi (576.12 km) |
| Imperial Beach to Oroville (California) | 539.25 mi (867.84 km) |
| Imperial Beach to Oshkosh (Wisconsin) | 1,726.77 mi (2,778.96 km) |
| Imperial Beach to Oskaloosa (Iowa) | 1,473.51 mi (2,371.39 km) |
