| Seymour to Smolyan | 5,370.21 mi (8,642.51 km) |
| Seymour to Sofia | 5,266.55 mi (8,475.69 km) |
| Seymour to Sopot | 5,323.03 mi (8,566.59 km) |
| Seymour to Sozopol | 5,444.59 mi (8,762.22 km) |
| Seymour to Sredets | 5,429.16 mi (8,737.39 km) |
| Seymour to Stamboliyski | 5,338.51 mi (8,591.49 km) |
| Seymour to Stara Zagora | 5,367.11 mi (8,637.53 km) |
| Seymour to Svilengrad | 5,419.00 mi (8,721.04 km) |
| Seymour to Svishtov | 5,301.10 mi (8,531.30 km) |
| Seymour to Targovishte | 5,363.94 mi (8,632.43 km) |
| Seymour to Teteven | 5,292.47 mi (8,517.40 km) |
| Seymour to Troyan | 5,311.06 mi (8,547.32 km) |
| Seymour to Tryavna | 5,341.36 mi (8,596.08 km) |
| Seymour to Tutrakan | 5,327.77 mi (8,574.22 km) |
| Seymour to Varna | 5,414.58 mi (8,713.93 km) |
