| Millbrae to Smolyan | 6,585.68 mi (10,598.63 km) |
| Millbrae to Sofia | 6,485.53 mi (10,437.45 km) |
| Millbrae to Sopot | 6,520.30 mi (10,493.41 km) |
| Millbrae to Sozopol | 6,597.15 mi (10,617.08 km) |
| Millbrae to Sredets | 6,591.17 mi (10,607.47 km) |
| Millbrae to Stamboliyski | 6,547.71 mi (10,537.52 km) |
| Millbrae to Stara Zagora | 6,553.36 mi (10,546.62 km) |
| Millbrae to Svilengrad | 6,606.99 mi (10,632.92 km) |
| Millbrae to Svishtov | 6,472.84 mi (10,417.03 km) |
| Millbrae to Targovishte | 6,521.65 mi (10,495.58 km) |
| Millbrae to Teteven | 6,493.07 mi (10,449.59 km) |
| Millbrae to Troyan | 6,505.03 mi (10,468.83 km) |
| Millbrae to Tryavna | 6,522.98 mi (10,497.72 km) |
| Millbrae to Tutrakan | 6,471.90 mi (10,415.51 km) |
| Millbrae to Varna | 6,550.71 mi (10,542.36 km) |
