| Pacifica to Orangeburg (South Carolina) | 2,337.24 mi (3,761.42 km) |
| Pacifica to Orangevale (California) | 101.00 mi (162.55 km) |
| Pacifica to Orchards (Washington) | 558.12 mi (898.21 km) |
| Pacifica to Orcutt (California) | 221.40 mi (356.31 km) |
| Pacifica to Oregon (Ohio) | 2,078.49 mi (3,345.00 km) |
| Pacifica to Oregon (Wisconsin) | 1,770.64 mi (2,849.57 km) |
| Pacifica to Oregon City (Oregon) | 534.16 mi (859.64 km) |
| Pacifica to Orem (Utah) | 607.70 mi (978.00 km) |
| Pacifica to Orinda (California) | 24.78 mi (39.88 km) |
| Pacifica to Orland Park (Illinois) | 1,850.57 mi (2,978.21 km) |
| Pacifica to Orlando (Florida) | 2,444.10 mi (3,933.40 km) |
| Pacifica to Ormond Beach (Florida) | 2,432.76 mi (3,915.15 km) |
| Pacifica to Oro Valley (Arizona) | 742.30 mi (1,194.62 km) |
| Pacifica to Oroville (California) | 139.53 mi (224.56 km) |
| Pacifica to Oshkosh (Wisconsin) | 1,814.11 mi (2,919.53 km) |
