| Glen Allen to Smolyan | 5,092.44 mi (8,195.50 km) |
| Glen Allen to Sofia | 4,990.40 mi (8,031.27 km) |
| Glen Allen to Sopot | 5,051.02 mi (8,128.83 km) |
| Glen Allen to Sozopol | 5,180.82 mi (8,337.73 km) |
| Glen Allen to Sredets | 5,163.41 mi (8,309.71 km) |
| Glen Allen to Stamboliyski | 5,063.09 mi (8,148.26 km) |
| Glen Allen to Stara Zagora | 5,096.80 mi (8,202.51 km) |
| Glen Allen to Svilengrad | 5,146.98 mi (8,283.26 km) |
| Glen Allen to Svishtov | 5,036.12 mi (8,104.84 km) |
| Glen Allen to Targovishte | 5,100.92 mi (8,209.13 km) |
| Glen Allen to Teteven | 5,020.36 mi (8,079.49 km) |
| Glen Allen to Troyan | 5,040.18 mi (8,111.38 km) |
| Glen Allen to Tryavna | 5,072.85 mi (8,163.97 km) |
| Glen Allen to Tutrakan | 5,069.12 mi (8,157.96 km) |
| Glen Allen to Varna | 5,155.71 mi (8,297.31 km) |
