| Lake Butler to Smolyan | 5,691.80 mi (9,160.07 km) |
| Lake Butler to Sofia | 5,591.82 mi (8,999.17 km) |
| Lake Butler to Sopot | 5,655.37 mi (9,101.44 km) |
| Lake Butler to Sozopol | 5,790.72 mi (9,319.27 km) |
| Lake Butler to Sredets | 5,771.91 mi (9,289.00 km) |
| Lake Butler to Stamboliyski | 5,664.60 mi (9,116.30 km) |
| Lake Butler to Stara Zagora | 5,702.19 mi (9,176.79 km) |
| Lake Butler to Svilengrad | 5,750.65 mi (9,254.78 km) |
| Lake Butler to Svishtov | 5,646.05 mi (9,086.43 km) |
| Lake Butler to Targovishte | 5,711.91 mi (9,192.42 km) |
| Lake Butler to Teteven | 5,624.85 mi (9,052.33 km) |
| Lake Butler to Troyan | 5,645.50 mi (9,085.56 km) |
| Lake Butler to Tryavna | 5,679.83 mi (9,140.80 km) |
| Lake Butler to Tutrakan | 5,683.54 mi (9,146.77 km) |
| Lake Butler to Varna | 5,769.42 mi (9,284.98 km) |
