| Killarney to Smolyan | 1,750.92 mi (2,817.83 km) |
| Killarney to Sofia | 1,649.04 mi (2,653.87 km) |
| Killarney to Sopot | 1,710.52 mi (2,752.82 km) |
| Killarney to Sozopol | 1,843.84 mi (2,967.37 km) |
| Killarney to Sredets | 1,825.33 mi (2,937.58 km) |
| Killarney to Stamboliyski | 1,721.78 mi (2,770.94 km) |
| Killarney to Stara Zagora | 1,756.80 mi (2,827.29 km) |
| Killarney to Svilengrad | 1,806.30 mi (2,906.95 km) |
| Killarney to Svishtov | 1,699.11 mi (2,734.45 km) |
| Killarney to Targovishte | 1,764.88 mi (2,840.30 km) |
| Killarney to Teteven | 1,679.90 mi (2,703.54 km) |
| Killarney to Troyan | 1,700.10 mi (2,736.04 km) |
| Killarney to Tryavna | 1,733.69 mi (2,790.11 km) |
| Killarney to Tutrakan | 1,736.88 mi (2,795.24 km) |
| Killarney to Varna | 1,822.54 mi (2,933.10 km) |
