| Northampton to Smolyan | 1,403.25 mi (2,258.32 km) |
| Northampton to Sofia | 1,300.00 mi (2,092.15 km) |
| Northampton to Sopot | 1,358.67 mi (2,186.56 km) |
| Northampton to Sozopol | 1,487.66 mi (2,394.16 km) |
| Northampton to Sredets | 1,470.12 mi (2,365.92 km) |
| Northampton to Stamboliyski | 1,372.33 mi (2,208.56 km) |
| Northampton to Stara Zagora | 1,403.99 mi (2,259.50 km) |
| Northampton to Svilengrad | 1,454.73 mi (2,341.17 km) |
| Northampton to Svishtov | 1,342.91 mi (2,161.20 km) |
| Northampton to Targovishte | 1,407.96 mi (2,265.90 km) |
| Northampton to Teteven | 1,328.01 mi (2,137.22 km) |
| Northampton to Troyan | 1,347.46 mi (2,168.52 km) |
| Northampton to Tryavna | 1,379.68 mi (2,220.38 km) |
| Northampton to Tutrakan | 1,377.75 mi (2,217.27 km) |
| Northampton to Varna | 1,463.95 mi (2,356.00 km) |
