| Birstall to Smolyan | 1,472.72 mi (2,370.12 km) |
| Birstall to Sofia | 1,368.76 mi (2,202.80 km) |
| Birstall to Sopot | 1,424.62 mi (2,292.71 km) |
| Birstall to Sozopol | 1,548.51 mi (2,492.08 km) |
| Birstall to Sredets | 1,532.15 mi (2,465.76 km) |
| Birstall to Stamboliyski | 1,440.43 mi (2,318.15 km) |
| Birstall to Stara Zagora | 1,468.83 mi (2,363.85 km) |
| Birstall to Svilengrad | 1,520.60 mi (2,447.17 km) |
| Birstall to Svishtov | 1,404.26 mi (2,259.93 km) |
| Birstall to Targovishte | 1,468.16 mi (2,362.78 km) |
| Birstall to Teteven | 1,394.06 mi (2,243.52 km) |
| Birstall to Troyan | 1,412.69 mi (2,273.51 km) |
| Birstall to Tryavna | 1,443.37 mi (2,322.89 km) |
| Birstall to Tutrakan | 1,434.97 mi (2,309.36 km) |
| Birstall to Varna | 1,521.67 mi (2,448.90 km) |
