| Athy to Smolyan | 1,662.33 mi (2,675.26 km) |
| Athy to Sofia | 1,559.40 mi (2,509.61 km) |
| Athy to Sopot | 1,618.78 mi (2,605.17 km) |
| Athy to Sozopol | 1,748.48 mi (2,813.91 km) |
| Athy to Sredets | 1,730.83 mi (2,785.51 km) |
| Athy to Stamboliyski | 1,631.88 mi (2,626.25 km) |
| Athy to Stara Zagora | 1,664.31 mi (2,678.44 km) |
| Athy to Svilengrad | 1,714.81 mi (2,759.73 km) |
| Athy to Svishtov | 1,603.71 mi (2,580.93 km) |
| Athy to Targovishte | 1,668.83 mi (2,685.73 km) |
| Athy to Teteven | 1,588.12 mi (2,555.83 km) |
| Athy to Troyan | 1,607.73 mi (2,587.39 km) |
| Athy to Tryavna | 1,640.21 mi (2,639.66 km) |
| Athy to Tutrakan | 1,638.64 mi (2,637.13 km) |
| Athy to Varna | 1,724.86 mi (2,775.89 km) |
