| Grudziadz to Smolyan | 867.24 mi (1,395.69 km) |
| Grudziadz to Sofia | 774.26 mi (1,246.05 km) |
| Grudziadz to Sopot | 797.62 mi (1,283.64 km) |
| Grudziadz to Sozopol | 868.18 mi (1,397.21 km) |
| Grudziadz to Sredets | 861.79 mi (1,386.91 km) |
| Grudziadz to Stamboliyski | 828.37 mi (1,333.14 km) |
| Grudziadz to Stara Zagora | 826.78 mi (1,330.58 km) |
| Grudziadz to Svilengrad | 879.76 mi (1,415.84 km) |
| Grudziadz to Svishtov | 744.96 mi (1,198.89 km) |
| Grudziadz to Targovishte | 792.27 mi (1,275.03 km) |
| Grudziadz to Teteven | 772.64 mi (1,243.44 km) |
| Grudziadz to Troyan | 781.78 mi (1,258.15 km) |
| Grudziadz to Tryavna | 796.04 mi (1,281.10 km) |
| Grudziadz to Tutrakan | 742.85 mi (1,195.51 km) |
| Grudziadz to Varna | 823.45 mi (1,325.21 km) |
