| Luton to Smolyan | 1,375.45 mi (2,213.57 km) |
| Luton to Sofia | 1,272.38 mi (2,047.69 km) |
| Luton to Sopot | 1,331.56 mi (2,142.94 km) |
| Luton to Sozopol | 1,461.53 mi (2,352.11 km) |
| Luton to Sredets | 1,443.75 mi (2,323.49 km) |
| Luton to Stamboliyski | 1,344.80 mi (2,164.25 km) |
| Luton to Stara Zagora | 1,377.08 mi (2,216.20 km) |
| Luton to Svilengrad | 1,427.60 mi (2,297.51 km) |
| Luton to Svishtov | 1,316.75 mi (2,119.10 km) |
| Luton to Targovishte | 1,382.00 mi (2,224.12 km) |
| Luton to Teteven | 1,300.90 mi (2,093.60 km) |
| Luton to Troyan | 1,320.50 mi (2,125.14 km) |
| Luton to Tryavna | 1,353.02 mi (2,177.48 km) |
| Luton to Tutrakan | 1,352.43 mi (2,176.52 km) |
| Luton to Varna | 1,438.48 mi (2,315.01 km) |
