| Mullingar to Smolyan | 1,686.28 mi (2,713.81 km) |
| Mullingar to Sofia | 1,583.04 mi (2,547.65 km) |
| Mullingar to Sopot | 1,641.56 mi (2,641.84 km) |
| Mullingar to Sozopol | 1,769.70 mi (2,848.06 km) |
| Mullingar to Sredets | 1,752.42 mi (2,820.25 km) |
| Mullingar to Stamboliyski | 1,655.36 mi (2,664.05 km) |
| Mullingar to Stara Zagora | 1,686.76 mi (2,714.58 km) |
| Mullingar to Svilengrad | 1,737.63 mi (2,796.45 km) |
| Mullingar to Svishtov | 1,625.01 mi (2,615.21 km) |
| Mullingar to Targovishte | 1,689.80 mi (2,719.47 km) |
| Mullingar to Teteven | 1,610.91 mi (2,592.50 km) |
| Mullingar to Troyan | 1,630.27 mi (2,623.66 km) |
| Mullingar to Tryavna | 1,662.28 mi (2,675.18 km) |
| Mullingar to Tutrakan | 1,658.65 mi (2,669.33 km) |
| Mullingar to Varna | 1,745.06 mi (2,808.41 km) |
