| Northeim to Smolyan | 984.08 mi (1,583.73 km) |
| Northeim to Sofia | 879.86 mi (1,416.00 km) |
| Northeim to Sopot | 930.29 mi (1,497.16 km) |
| Northeim to Sozopol | 1,046.99 mi (1,684.97 km) |
| Northeim to Sredets | 1,031.94 mi (1,660.75 km) |
| Northeim to Stamboliyski | 949.55 mi (1,528.16 km) |
| Northeim to Stara Zagora | 972.50 mi (1,565.09 km) |
| Northeim to Svilengrad | 1,025.43 mi (1,650.27 km) |
| Northeim to Svishtov | 903.89 mi (1,454.68 km) |
| Northeim to Targovishte | 966.32 mi (1,555.15 km) |
| Northeim to Teteven | 900.13 mi (1,448.62 km) |
| Northeim to Troyan | 917.34 mi (1,476.32 km) |
| Northeim to Tryavna | 945.64 mi (1,521.85 km) |
| Northeim to Tutrakan | 930.78 mi (1,497.94 km) |
| Northeim to Varna | 1,017.61 mi (1,637.68 km) |
