| Ashtabula to Smolyan | 5,035.97 mi (8,104.61 km) |
| Ashtabula to Sofia | 4,932.41 mi (7,937.95 km) |
| Ashtabula to Sopot | 4,989.31 mi (8,029.53 km) |
| Ashtabula to Sozopol | 5,111.83 mi (8,226.70 km) |
| Ashtabula to Sredets | 5,096.17 mi (8,201.49 km) |
| Ashtabula to Stamboliyski | 5,004.47 mi (8,053.91 km) |
| Ashtabula to Stara Zagora | 5,033.59 mi (8,100.78 km) |
| Ashtabula to Svilengrad | 5,085.32 mi (8,184.04 km) |
| Ashtabula to Svishtov | 4,968.13 mi (7,995.43 km) |
| Ashtabula to Targovishte | 5,031.23 mi (8,096.98 km) |
| Ashtabula to Teteven | 4,958.73 mi (7,980.30 km) |
| Ashtabula to Troyan | 4,977.45 mi (8,010.43 km) |
| Ashtabula to Tryavna | 5,008.01 mi (8,059.62 km) |
| Ashtabula to Tutrakan | 4,995.58 mi (8,039.62 km) |
| Ashtabula to Varna | 5,082.42 mi (8,179.36 km) |
