| South San Francisco to Devnya | 6,540.59 mi (10,526.06 km) |
| South San Francisco to Dimitrovgrad | 6,573.23 mi (10,578.58 km) |
| South San Francisco to Dobrich | 6,523.67 mi (10,498.84 km) |
| South San Francisco to Dospat | 6,566.51 mi (10,567.78 km) |
| South San Francisco to Dupnitsa | 6,504.54 mi (10,468.05 km) |
| South San Francisco to Elhovo | 6,586.47 mi (10,599.90 km) |
| South San Francisco to Etropole | 6,489.29 mi (10,443.50 km) |
| South San Francisco to Gabrovo | 6,516.33 mi (10,487.03 km) |
| South San Francisco to Gorna Oryahovitsa | 6,507.44 mi (10,472.71 km) |
| South San Francisco to Gotse Delchev | 6,561.82 mi (10,560.24 km) |
| South San Francisco to Harmanli | 6,587.01 mi (10,600.76 km) |
| South San Francisco to Haskovo | 6,579.82 mi (10,589.19 km) |
| South San Francisco to Ihtiman | 6,509.74 mi (10,476.42 km) |
| South San Francisco to Isperih | 6,494.18 mi (10,451.37 km) |
| South San Francisco to Kardzhali | 6,593.20 mi (10,610.73 km) |
