| Campbell to Odessa (Texas) | 1,173.62 mi (1,888.75 km) |
| Campbell to Ogden (Utah) | 599.33 mi (964.53 km) |
| Campbell to Oildale (California) | 206.90 mi (332.97 km) |
| Campbell to Ojus (Florida) | 2,557.36 mi (4,115.68 km) |
| Campbell to Okemos (Michigan) | 2,005.16 mi (3,226.99 km) |
| Campbell to Oklahoma City (Oklahoma) | 1,361.61 mi (2,191.29 km) |
| Campbell to Okmulgee (Oklahoma) | 1,442.19 mi (2,320.98 km) |
| Campbell to Olathe (Kansas) | 1,474.41 mi (2,372.83 km) |
| Campbell to Old Jamestown (Missouri) | 1,717.61 mi (2,764.23 km) |
| Campbell to Oldsmar (Florida) | 2,353.94 mi (3,788.30 km) |
| Campbell to Olean (New York) | 2,312.68 mi (3,721.90 km) |
| Campbell to Olive Branch (Mississippi) | 1,790.52 mi (2,881.56 km) |
| Campbell to Olivehurst (California) | 126.18 mi (203.06 km) |
| Campbell to Olney (Maryland) | 2,414.99 mi (3,886.56 km) |
| Campbell to Olympia (Washington) | 676.16 mi (1,088.18 km) |
