| Runcorn to Smolyan | 1,502.94 mi (2,418.74 km) |
| Runcorn to Sofia | 1,399.26 mi (2,251.90 km) |
| Runcorn to Sopot | 1,456.47 mi (2,343.96 km) |
| Runcorn to Sozopol | 1,582.65 mi (2,547.03 km) |
| Runcorn to Sredets | 1,565.78 mi (2,519.88 km) |
| Runcorn to Stamboliyski | 1,471.29 mi (2,367.81 km) |
| Runcorn to Stara Zagora | 1,501.20 mi (2,415.95 km) |
| Runcorn to Svilengrad | 1,552.53 mi (2,498.56 km) |
| Runcorn to Svishtov | 1,438.12 mi (2,314.42 km) |
| Runcorn to Targovishte | 1,502.53 mi (2,418.10 km) |
| Runcorn to Teteven | 1,425.85 mi (2,294.68 km) |
| Runcorn to Troyan | 1,444.86 mi (2,325.28 km) |
| Runcorn to Tryavna | 1,476.24 mi (2,375.79 km) |
| Runcorn to Tutrakan | 1,470.53 mi (2,366.59 km) |
| Runcorn to Varna | 1,557.08 mi (2,505.87 km) |
