| Carlow to Smolyan | 1,657.16 mi (2,666.94 km) |
| Carlow to Sofia | 1,554.34 mi (2,501.47 km) |
| Carlow to Sopot | 1,613.99 mi (2,597.47 km) |
| Carlow to Sozopol | 1,744.19 mi (2,807.00 km) |
| Carlow to Sredets | 1,726.42 mi (2,778.41 km) |
| Carlow to Stamboliyski | 1,626.86 mi (2,618.18 km) |
| Carlow to Stara Zagora | 1,659.62 mi (2,670.90 km) |
| Carlow to Svilengrad | 1,710.01 mi (2,751.99 km) |
| Carlow to Svishtov | 1,599.41 mi (2,574.00 km) |
| Carlow to Targovishte | 1,664.62 mi (2,678.95 km) |
| Carlow to Teteven | 1,583.33 mi (2,548.12 km) |
| Carlow to Troyan | 1,603.02 mi (2,579.81 km) |
| Carlow to Tryavna | 1,635.65 mi (2,632.33 km) |
| Carlow to Tutrakan | 1,634.74 mi (2,630.85 km) |
| Carlow to Varna | 1,720.89 mi (2,769.50 km) |
