| Campbell to Orangevale (California) | 105.15 mi (169.22 km) |
| Campbell to Orchards (Washington) | 581.75 mi (936.24 km) |
| Campbell to Orcutt (California) | 187.26 mi (301.37 km) |
| Campbell to Oregon (Ohio) | 2,059.47 mi (3,314.40 km) |
| Campbell to Oregon (Wisconsin) | 1,752.98 mi (2,821.14 km) |
| Campbell to Oregon City (Oregon) | 557.98 mi (897.99 km) |
| Campbell to Orem (Utah) | 589.87 mi (949.30 km) |
| Campbell to Orinda (California) | 43.29 mi (69.67 km) |
| Campbell to Orland Park (Illinois) | 1,831.26 mi (2,947.13 km) |
| Campbell to Orlando (Florida) | 2,414.35 mi (3,885.53 km) |
| Campbell to Ormond Beach (Florida) | 2,403.57 mi (3,868.17 km) |
| Campbell to Oro Valley (Arizona) | 706.52 mi (1,137.04 km) |
| Campbell to Oroville (California) | 154.82 mi (249.15 km) |
| Campbell to Oshkosh (Wisconsin) | 1,797.85 mi (2,893.36 km) |
| Campbell to Oskaloosa (Iowa) | 1,584.14 mi (2,549.42 km) |
