| Erie to Smolyan | 4,997.13 mi (8,042.10 km) |
| Erie to Sofia | 4,893.61 mi (7,875.50 km) |
| Erie to Sopot | 4,950.66 mi (7,967.32 km) |
| Erie to Sozopol | 5,073.48 mi (8,164.98 km) |
| Erie to Sredets | 5,057.74 mi (8,139.65 km) |
| Erie to Stamboliyski | 4,965.70 mi (7,991.52 km) |
| Erie to Stara Zagora | 4,995.00 mi (8,038.67 km) |
| Erie to Svilengrad | 5,046.68 mi (8,121.85 km) |
| Erie to Svishtov | 4,929.71 mi (7,933.61 km) |
| Erie to Targovishte | 4,992.90 mi (8,035.29 km) |
| Erie to Teteven | 4,920.07 mi (7,918.08 km) |
| Erie to Troyan | 4,938.83 mi (7,948.28 km) |
| Erie to Tryavna | 4,969.48 mi (7,997.61 km) |
| Erie to Tutrakan | 4,957.40 mi (7,978.17 km) |
| Erie to Varna | 5,044.24 mi (8,117.92 km) |
