| Avon to Smolyan | 1,167.34 mi (1,878.65 km) |
| Avon to Sofia | 1,067.95 mi (1,718.71 km) |
| Avon to Sopot | 1,133.02 mi (1,823.42 km) |
| Avon to Sozopol | 1,273.38 mi (2,049.31 km) |
| Avon to Sredets | 1,252.94 mi (2,016.41 km) |
| Avon to Stamboliyski | 1,140.64 mi (1,835.68 km) |
| Avon to Stara Zagora | 1,180.47 mi (1,899.78 km) |
| Avon to Svilengrad | 1,227.53 mi (1,975.51 km) |
| Avon to Svishtov | 1,130.24 mi (1,818.94 km) |
| Avon to Targovishte | 1,197.01 mi (1,926.40 km) |
| Avon to Teteven | 1,102.74 mi (1,774.70 km) |
| Avon to Troyan | 1,124.01 mi (1,808.92 km) |
| Avon to Tryavna | 1,159.77 mi (1,866.48 km) |
| Avon to Tutrakan | 1,175.65 mi (1,892.03 km) |
| Avon to Varna | 1,258.60 mi (2,025.52 km) |
