| Seabrook to Smolyan | 5,007.70 mi (8,059.11 km) |
| Seabrook to Sofia | 4,905.39 mi (7,894.46 km) |
| Seabrook to Sopot | 4,965.53 mi (7,991.24 km) |
| Seabrook to Sozopol | 5,094.40 mi (8,198.64 km) |
| Seabrook to Sredets | 5,077.22 mi (8,170.99 km) |
| Seabrook to Stamboliyski | 4,978.03 mi (8,011.37 km) |
| Seabrook to Stara Zagora | 5,011.12 mi (8,064.62 km) |
| Seabrook to Svilengrad | 5,061.53 mi (8,145.75 km) |
| Seabrook to Svishtov | 4,949.76 mi (7,965.87 km) |
| Seabrook to Targovishte | 5,014.37 mi (8,069.85 km) |
| Seabrook to Teteven | 4,934.86 mi (7,941.90 km) |
| Seabrook to Troyan | 4,954.54 mi (7,973.56 km) |
| Seabrook to Tryavna | 4,986.94 mi (8,025.71 km) |
| Seabrook to Tutrakan | 4,982.05 mi (8,017.84 km) |
| Seabrook to Varna | 5,068.71 mi (8,157.30 km) |
