| South San Francisco to Willow Grove (Pennsylvania) | 2,519.19 mi (4,054.25 km) |
| South San Francisco to Willowbrook (California) | 348.51 mi (560.87 km) |
| South San Francisco to Willowick (Ohio) | 2,175.47 mi (3,501.07 km) |
| South San Francisco to Wilmette (Illinois) | 1,851.97 mi (2,980.46 km) |
| South San Francisco to Wilmington (Delaware) | 2,502.99 mi (4,028.17 km) |
| South San Francisco to Wilmington (North Carolina) | 2,479.49 mi (3,990.35 km) |
| South San Francisco to Wilmington (Ohio) | 2,073.90 mi (3,337.62 km) |
| South San Francisco to Wilmington Island (Georgia) | 2,363.39 mi (3,803.51 km) |
| South San Francisco to Wilson (North Carolina) | 2,445.30 mi (3,935.34 km) |
| South San Francisco to Wilsonville (Oregon) | 529.36 mi (851.93 km) |
| South San Francisco to Wilton Manors (Florida) | 2,579.71 mi (4,151.64 km) |
| South San Francisco to Wimauma (Florida) | 2,412.28 mi (3,882.19 km) |
| South San Francisco to Winchester (Kentucky) | 2,071.49 mi (3,333.74 km) |
| South San Francisco to Winchester (Nevada) | 415.72 mi (669.03 km) |
| South San Francisco to Winchester (Virginia) | 2,373.67 mi (3,820.06 km) |
