| Port Laoise to Smolyan | 1,675.62 mi (2,696.65 km) |
| Port Laoise to Sofia | 1,572.70 mi (2,531.01 km) |
| Port Laoise to Sopot | 1,632.09 mi (2,626.60 km) |
| Port Laoise to Sozopol | 1,761.80 mi (2,835.34 km) |
| Port Laoise to Sredets | 1,744.15 mi (2,806.94 km) |
| Port Laoise to Stamboliyski | 1,645.18 mi (2,647.66 km) |
| Port Laoise to Stara Zagora | 1,677.62 mi (2,699.87 km) |
| Port Laoise to Svilengrad | 1,728.13 mi (2,781.15 km) |
| Port Laoise to Svishtov | 1,617.03 mi (2,602.36 km) |
| Port Laoise to Targovishte | 1,682.15 mi (2,707.15 km) |
| Port Laoise to Teteven | 1,601.43 mi (2,577.25 km) |
| Port Laoise to Troyan | 1,621.04 mi (2,608.81 km) |
| Port Laoise to Tryavna | 1,653.53 mi (2,661.09 km) |
| Port Laoise to Tutrakan | 1,651.93 mi (2,658.53 km) |
| Port Laoise to Varna | 1,738.16 mi (2,797.30 km) |
