| South San Francisco to Worthington (Ohio) | 2,108.68 mi (3,393.59 km) |
| South San Francisco to Wright (Florida) | 2,094.35 mi (3,370.53 km) |
| South San Francisco to Wyandanch (New York) | 2,601.04 mi (4,185.97 km) |
| South San Francisco to Wyandotte (Michigan) | 2,085.22 mi (3,355.84 km) |
| South San Francisco to Wylie (Texas) | 1,489.24 mi (2,396.70 km) |
| South San Francisco to Wyndham (Virginia) | 2,426.25 mi (3,904.68 km) |
| South San Francisco to Wyoming (Michigan) | 1,952.93 mi (3,142.93 km) |
| South San Francisco to Wyomissing (Pennsylvania) | 2,472.57 mi (3,979.22 km) |
| South San Francisco to Xenia (Ohio) | 2,064.59 mi (3,322.64 km) |
| South San Francisco to Yakima (Washington) | 624.93 mi (1,005.73 km) |
| South San Francisco to Yankton (South Dakota) | 1,362.38 mi (2,192.54 km) |
| South San Francisco to Yauco (Puerto Rico) | 3,596.69 mi (5,788.32 km) |
| South San Francisco to Yazoo City (Mississippi) | 1,827.03 mi (2,940.32 km) |
| South San Francisco to Yeadon (Pennsylvania) | 2,515.23 mi (4,047.87 km) |
| South San Francisco to Yelm (Washington) | 641.69 mi (1,032.69 km) |
