| Cal to Odessa (Texas) | 6,691.58 mi (10,769.05 km) |
| Cal to Ogden (Utah) | 6,439.89 mi (10,364.00 km) |
| Cal to Oildale (California) | 6,970.63 mi (11,218.14 km) |
| Cal to Ojus (Florida) | 6,087.59 mi (9,797.03 km) |
| Cal to Okemos (Michigan) | 5,482.54 mi (8,823.29 km) |
| Cal to Oklahoma City (Oklahoma) | 6,325.76 mi (10,180.32 km) |
| Cal to Okmulgee (Oklahoma) | 6,264.14 mi (10,081.15 km) |
| Cal to Olathe (Kansas) | 6,049.57 mi (9,735.84 km) |
| Cal to Old Jamestown (Missouri) | 5,888.57 mi (9,476.74 km) |
| Cal to Oldsmar (Florida) | 6,103.33 mi (9,822.36 km) |
| Cal to Olean (New York) | 5,281.35 mi (8,499.51 km) |
| Cal to Olive Branch (Mississippi) | 6,066.78 mi (9,763.54 km) |
| Cal to Olivehurst (California) | 6,795.80 mi (10,936.78 km) |
| Cal to Olney (Maryland) | 5,355.19 mi (8,618.35 km) |
| Cal to Olympia (Washington) | 6,311.36 mi (10,157.15 km) |
