| Richfield to Smolyan | 5,341.93 mi (8,597.01 km) |
| Richfield to Sofia | 5,237.69 mi (8,429.25 km) |
| Richfield to Sopot | 5,287.09 mi (8,508.75 km) |
| Richfield to Sozopol | 5,394.53 mi (8,681.65 km) |
| Richfield to Sredets | 5,382.24 mi (8,661.88 km) |
| Richfield to Stamboliyski | 5,307.30 mi (8,541.28 km) |
| Richfield to Stara Zagora | 5,327.91 mi (8,574.44 km) |
| Richfield to Svilengrad | 5,381.41 mi (8,660.54 km) |
| Richfield to Svishtov | 5,255.31 mi (8,457.60 km) |
| Richfield to Targovishte | 5,314.21 mi (8,552.39 km) |
| Richfield to Teteven | 5,257.20 mi (8,460.65 km) |
| Richfield to Troyan | 5,273.67 mi (8,487.15 km) |
| Richfield to Tryavna | 5,299.96 mi (8,529.47 km) |
| Richfield to Tutrakan | 5,272.41 mi (8,485.12 km) |
| Richfield to Varna | 5,358.01 mi (8,622.89 km) |
