| Grimstad to Smolyan | 1,353.44 mi (2,178.15 km) |
| Grimstad to Sofia | 1,253.54 mi (2,017.38 km) |
| Grimstad to Sopot | 1,288.59 mi (2,073.79 km) |
| Grimstad to Sozopol | 1,375.04 mi (2,212.91 km) |
| Grimstad to Sredets | 1,366.27 mi (2,198.81 km) |
| Grimstad to Stamboliyski | 1,315.52 mi (2,117.12 km) |
| Grimstad to Stara Zagora | 1,323.08 mi (2,129.29 km) |
| Grimstad to Svilengrad | 1,376.97 mi (2,216.03 km) |
| Grimstad to Svishtov | 1,244.06 mi (2,002.11 km) |
| Grimstad to Targovishte | 1,296.79 mi (2,086.98 km) |
| Grimstad to Teteven | 1,261.03 mi (2,029.44 km) |
| Grimstad to Troyan | 1,273.49 mi (2,049.49 km) |
| Grimstad to Tryavna | 1,293.07 mi (2,081.00 km) |
| Grimstad to Tutrakan | 1,250.21 mi (2,012.01 km) |
| Grimstad to Varna | 1,333.32 mi (2,145.77 km) |
