| McDonough to Smolyan | 5,565.93 mi (8,957.49 km) |
| McDonough to Sofia | 5,463.67 mi (8,792.93 km) |
| McDonough to Sopot | 5,523.87 mi (8,889.81 km) |
| McDonough to Sozopol | 5,652.70 mi (9,097.13 km) |
| McDonough to Sredets | 5,635.55 mi (9,069.54 km) |
| McDonough to Stamboliyski | 5,536.32 mi (8,909.85 km) |
| McDonough to Stara Zagora | 5,569.48 mi (8,963.21 km) |
| McDonough to Svilengrad | 5,619.88 mi (9,044.32 km) |
| McDonough to Svishtov | 5,508.07 mi (8,864.39 km) |
| McDonough to Targovishte | 5,572.64 mi (8,968.30 km) |
| McDonough to Teteven | 5,493.21 mi (8,840.47 km) |
| McDonough to Troyan | 5,512.89 mi (8,872.14 km) |
| McDonough to Tryavna | 5,545.29 mi (8,924.29 km) |
| McDonough to Tutrakan | 5,540.17 mi (8,916.04 km) |
| McDonough to Varna | 5,626.85 mi (9,055.55 km) |
