| Pacifica to Odenton (Maryland) | 2,456.75 mi (3,953.76 km) |
| Pacifica to Odessa (Texas) | 1,206.76 mi (1,942.10 km) |
| Pacifica to Ogden (Utah) | 613.57 mi (987.44 km) |
| Pacifica to Oildale (California) | 243.64 mi (392.10 km) |
| Pacifica to Ojus (Florida) | 2,588.20 mi (4,165.30 km) |
| Pacifica to Okemos (Michigan) | 2,023.05 mi (3,255.78 km) |
| Pacifica to Oklahoma City (Oklahoma) | 1,389.63 mi (2,236.39 km) |
| Pacifica to Okmulgee (Oklahoma) | 1,469.71 mi (2,365.27 km) |
| Pacifica to Olathe (Kansas) | 1,497.63 mi (2,410.20 km) |
| Pacifica to Old Jamestown (Missouri) | 1,740.43 mi (2,800.95 km) |
| Pacifica to Oldsmar (Florida) | 2,384.26 mi (3,837.10 km) |
| Pacifica to Olean (New York) | 2,330.84 mi (3,751.13 km) |
| Pacifica to Olive Branch (Mississippi) | 1,817.42 mi (2,924.85 km) |
| Pacifica to Olivehurst (California) | 113.07 mi (181.96 km) |
| Pacifica to Olney (Maryland) | 2,435.78 mi (3,920.01 km) |
