| Catonsville to Smolyan | 4,990.70 mi (8,031.75 km) |
| Catonsville to Sofia | 4,888.33 mi (7,867.00 km) |
| Catonsville to Sopot | 4,948.34 mi (7,963.59 km) |
| Catonsville to Sozopol | 5,076.99 mi (8,170.62 km) |
| Catonsville to Sredets | 5,059.86 mi (8,143.06 km) |
| Catonsville to Stamboliyski | 4,960.95 mi (7,983.88 km) |
| Catonsville to Stara Zagora | 4,993.89 mi (8,036.89 km) |
| Catonsville to Svilengrad | 5,044.36 mi (8,118.11 km) |
| Catonsville to Svishtov | 4,932.37 mi (7,937.88 km) |
| Catonsville to Targovishte | 4,996.93 mi (8,041.78 km) |
| Catonsville to Teteven | 4,917.68 mi (7,914.24 km) |
| Catonsville to Troyan | 4,937.32 mi (7,945.85 km) |
| Catonsville to Tryavna | 4,969.66 mi (7,997.89 km) |
| Catonsville to Tutrakan | 4,964.48 mi (7,989.56 km) |
| Catonsville to Varna | 5,051.16 mi (8,129.05 km) |
