| Avon Lake to Smolyan | 5,100.73 mi (8,208.83 km) |
| Avon Lake to Sofia | 4,997.10 mi (8,042.06 km) |
| Avon Lake to Sopot | 5,053.74 mi (8,133.22 km) |
| Avon Lake to Sozopol | 5,175.72 mi (8,329.51 km) |
| Avon Lake to Sredets | 5,160.18 mi (8,304.51 km) |
| Avon Lake to Stamboliyski | 5,069.10 mi (8,157.92 km) |
| Avon Lake to Stara Zagora | 5,097.90 mi (8,204.28 km) |
| Avon Lake to Svilengrad | 5,149.73 mi (8,287.69 km) |
| Avon Lake to Svishtov | 5,032.13 mi (8,098.43 km) |
| Avon Lake to Targovishte | 5,095.09 mi (8,199.76 km) |
| Avon Lake to Teteven | 5,023.17 mi (8,084.01 km) |
| Avon Lake to Troyan | 5,041.81 mi (8,114.01 km) |
| Avon Lake to Tryavna | 5,072.22 mi (8,162.95 km) |
| Avon Lake to Tutrakan | 5,059.17 mi (8,141.95 km) |
| Avon Lake to Varna | 5,146.00 mi (8,281.68 km) |
