| Glencullen to Smolyan | 1,636.06 mi (2,632.99 km) |
| Glencullen to Sofia | 1,532.88 mi (2,466.94 km) |
| Glencullen to Sopot | 1,591.62 mi (2,561.47 km) |
| Glencullen to Sozopol | 1,720.24 mi (2,768.46 km) |
| Glencullen to Sredets | 1,702.84 mi (2,740.45 km) |
| Glencullen to Stamboliyski | 1,605.25 mi (2,583.40 km) |
| Glencullen to Stara Zagora | 1,636.92 mi (2,634.36 km) |
| Glencullen to Svilengrad | 1,687.69 mi (2,716.08 km) |
| Glencullen to Svishtov | 1,575.52 mi (2,535.55 km) |
| Glencullen to Targovishte | 1,640.42 mi (2,640.00 km) |
| Glencullen to Teteven | 1,560.96 mi (2,512.13 km) |
| Glencullen to Troyan | 1,580.40 mi (2,543.40 km) |
| Glencullen to Tryavna | 1,612.54 mi (2,595.14 km) |
| Glencullen to Tutrakan | 1,609.61 mi (2,590.41 km) |
| Glencullen to Varna | 1,695.95 mi (2,729.38 km) |
