| Kempston to Smolyan | 1,384.66 mi (2,228.39 km) |
| Kempston to Sofia | 1,281.42 mi (2,062.25 km) |
| Kempston to Sopot | 1,340.15 mi (2,156.76 km) |
| Kempston to Sozopol | 1,469.30 mi (2,364.60 km) |
| Kempston to Sredets | 1,451.71 mi (2,336.30 km) |
| Kempston to Stamboliyski | 1,353.77 mi (2,178.68 km) |
| Kempston to Stara Zagora | 1,385.50 mi (2,229.74 km) |
| Kempston to Svilengrad | 1,436.21 mi (2,311.36 km) |
| Kempston to Svishtov | 1,324.53 mi (2,131.63 km) |
| Kempston to Targovishte | 1,389.62 mi (2,236.38 km) |
| Kempston to Teteven | 1,309.49 mi (2,107.42 km) |
| Kempston to Troyan | 1,328.96 mi (2,138.75 km) |
| Kempston to Tryavna | 1,361.23 mi (2,190.68 km) |
| Kempston to Tutrakan | 1,359.53 mi (2,187.95 km) |
| Kempston to Varna | 1,445.71 mi (2,326.64 km) |
