| Avondale to Smolyan | 6,581.95 mi (10,592.63 km) |
| Avondale to Sofia | 6,478.42 mi (10,426.01 km) |
| Avondale to Sopot | 6,522.91 mi (10,497.60 km) |
| Avondale to Sozopol | 6,619.66 mi (10,653.31 km) |
| Avondale to Sredets | 6,609.70 mi (10,637.28 km) |
| Avondale to Stamboliyski | 6,545.88 mi (10,534.57 km) |
| Avondale to Stara Zagora | 6,561.17 mi (10,559.19 km) |
| Avondale to Svilengrad | 6,615.12 mi (10,646.01 km) |
| Avondale to Svishtov | 6,485.04 mi (10,436.66 km) |
| Avondale to Targovishte | 6,540.55 mi (10,526.00 km) |
| Avondale to Teteven | 6,493.76 mi (10,450.70 km) |
| Avondale to Troyan | 6,508.70 mi (10,474.75 km) |
| Avondale to Tryavna | 6,532.10 mi (10,512.41 km) |
| Avondale to Tutrakan | 6,495.31 mi (10,453.19 km) |
| Avondale to Varna | 6,578.96 mi (10,587.81 km) |
