| Red Bluff to Smolyan | 6,419.79 mi (10,331.65 km) |
| Red Bluff to Sofia | 6,320.13 mi (10,171.26 km) |
| Red Bluff to Sopot | 6,353.87 mi (10,225.56 km) |
| Red Bluff to Sozopol | 6,428.71 mi (10,346.01 km) |
| Red Bluff to Sredets | 6,423.11 mi (10,336.99 km) |
| Red Bluff to Stamboliyski | 6,381.68 mi (10,270.32 km) |
| Red Bluff to Stara Zagora | 6,386.37 mi (10,277.86 km) |
| Red Bluff to Svilengrad | 6,439.88 mi (10,363.99 km) |
| Red Bluff to Svishtov | 6,305.53 mi (10,147.78 km) |
| Red Bluff to Targovishte | 6,353.64 mi (10,225.20 km) |
| Red Bluff to Teteven | 6,326.86 mi (10,182.10 km) |
| Red Bluff to Troyan | 6,338.51 mi (10,200.84 km) |
| Red Bluff to Tryavna | 6,355.90 mi (10,228.83 km) |
| Red Bluff to Tutrakan | 6,303.54 mi (10,144.56 km) |
| Red Bluff to Varna | 6,381.82 mi (10,270.55 km) |
