| Irlam to Smolyan | 1,493.68 mi (2,403.85 km) |
| Irlam to Sofia | 1,389.92 mi (2,236.87 km) |
| Irlam to Sopot | 1,446.77 mi (2,328.36 km) |
| Irlam to Sozopol | 1,572.34 mi (2,530.44 km) |
| Irlam to Sredets | 1,555.61 mi (2,503.52 km) |
| Irlam to Stamboliyski | 1,461.86 mi (2,352.63 km) |
| Irlam to Stara Zagora | 1,491.37 mi (2,400.12 km) |
| Irlam to Svilengrad | 1,542.82 mi (2,482.93 km) |
| Irlam to Svishtov | 1,427.88 mi (2,297.95 km) |
| Irlam to Targovishte | 1,492.16 mi (2,401.40 km) |
| Irlam to Teteven | 1,416.16 mi (2,279.10 km) |
| Irlam to Troyan | 1,435.08 mi (2,309.53 km) |
| Irlam to Tryavna | 1,466.27 mi (2,359.74 km) |
| Irlam to Tutrakan | 1,459.84 mi (2,349.38 km) |
| Irlam to Varna | 1,546.44 mi (2,488.75 km) |
