| North Hykeham to Smolyan | 1,416.97 mi (2,280.39 km) |
| North Hykeham to Sofia | 1,313.11 mi (2,113.25 km) |
| North Hykeham to Sopot | 1,369.58 mi (2,204.13 km) |
| North Hykeham to Sozopol | 1,494.69 mi (2,405.48 km) |
| North Hykeham to Sredets | 1,478.04 mi (2,378.68 km) |
| North Hykeham to Stamboliyski | 1,384.94 mi (2,228.85 km) |
| North Hykeham to Stara Zagora | 1,414.05 mi (2,275.70 km) |
| North Hykeham to Svilengrad | 1,465.61 mi (2,358.67 km) |
| North Hykeham to Svishtov | 1,350.27 mi (2,173.05 km) |
| North Hykeham to Targovishte | 1,414.48 mi (2,276.38 km) |
| North Hykeham to Teteven | 1,338.99 mi (2,154.90 km) |
| North Hykeham to Troyan | 1,357.81 mi (2,185.18 km) |
| North Hykeham to Tryavna | 1,388.85 mi (2,235.14 km) |
| North Hykeham to Tutrakan | 1,382.03 mi (2,224.17 km) |
| North Hykeham to Varna | 1,468.64 mi (2,363.55 km) |
