| South San Francisco to Oak Grove (South Carolina) | 2,307.74 mi (3,713.94 km) |
| South San Francisco to Oak Harbor (Washington) | 735.41 mi (1,183.53 km) |
| South San Francisco to Oak Hills (Oregon) | 545.35 mi (877.66 km) |
| South San Francisco to Oak Lawn (Illinois) | 1,851.82 mi (2,980.21 km) |
| South San Francisco to Oak Park (California) | 314.93 mi (506.82 km) |
| South San Francisco to Oak Park (Illinois) | 1,849.34 mi (2,976.23 km) |
| South San Francisco to Oak Park (Michigan) | 2,082.52 mi (3,351.49 km) |
| South San Francisco to Oak Ridge (Florida) | 2,436.81 mi (3,921.66 km) |
| South San Francisco to Oak Ridge (New Jersey) | 2,539.14 mi (4,086.36 km) |
| South San Francisco to Oak Ridge (Tennessee) | 2,097.77 mi (3,376.04 km) |
| South San Francisco to Oakdale (California) | 86.30 mi (138.88 km) |
| South San Francisco to Oakdale (Minnesota) | 1,599.91 mi (2,574.81 km) |
| South San Francisco to Oakland (California) | 14.57 mi (23.44 km) |
| South San Francisco to Oakland (New Jersey) | 2,552.27 mi (4,107.49 km) |
| South San Francisco to Oakland Park (Florida) | 2,578.37 mi (4,149.48 km) |
