| Youngsville to Smolyan | 6,051.78 mi (9,739.40 km) |
| Youngsville to Sofia | 5,948.72 mi (9,573.55 km) |
| Youngsville to Sopot | 6,007.07 mi (9,667.44 km) |
| Youngsville to Sozopol | 6,132.06 mi (9,868.60 km) |
| Youngsville to Sredets | 6,115.86 mi (9,842.53 km) |
| Youngsville to Stamboliyski | 6,021.09 mi (9,690.01 km) |
| Youngsville to Stara Zagora | 6,051.91 mi (9,739.61 km) |
| Youngsville to Svilengrad | 6,103.14 mi (9,822.06 km) |
| Youngsville to Svishtov | 5,987.94 mi (9,636.66 km) |
| Youngsville to Targovishte | 6,051.60 mi (9,739.11 km) |
| Youngsville to Teteven | 5,976.43 mi (9,618.13 km) |
| Youngsville to Troyan | 5,995.55 mi (9,648.91 km) |
| Youngsville to Tryavna | 6,026.86 mi (9,699.30 km) |
| Youngsville to Tutrakan | 6,016.98 mi (9,683.39 km) |
| Youngsville to Varna | 6,103.81 mi (9,823.13 km) |
