| Prestwick to Smolyan | 1,630.16 mi (2,623.49 km) |
| Prestwick to Sofia | 1,525.93 mi (2,455.74 km) |
| Prestwick to Sopot | 1,579.62 mi (2,542.15 km) |
| Prestwick to Sozopol | 1,699.16 mi (2,734.54 km) |
| Prestwick to Sredets | 1,683.81 mi (2,709.84 km) |
| Prestwick to Stamboliyski | 1,596.96 mi (2,570.05 km) |
| Prestwick to Stara Zagora | 1,622.86 mi (2,611.75 km) |
| Prestwick to Svilengrad | 1,675.29 mi (2,696.12 km) |
| Prestwick to Svishtov | 1,555.74 mi (2,503.73 km) |
| Prestwick to Targovishte | 1,618.52 mi (2,604.76 km) |
| Prestwick to Teteven | 1,549.20 mi (2,493.20 km) |
| Prestwick to Troyan | 1,567.17 mi (2,522.12 km) |
| Prestwick to Tryavna | 1,596.59 mi (2,569.46 km) |
| Prestwick to Tutrakan | 1,582.98 mi (2,547.55 km) |
| Prestwick to Varna | 1,669.81 mi (2,687.31 km) |
