| Harderwijk to Smolyan | 1,161.22 mi (1,868.80 km) |
| Harderwijk to Sofia | 1,056.98 mi (1,701.04 km) |
| Harderwijk to Sopot | 1,110.89 mi (1,787.81 km) |
| Harderwijk to Sozopol | 1,232.49 mi (1,983.50 km) |
| Harderwijk to Sredets | 1,216.51 mi (1,957.79 km) |
| Harderwijk to Stamboliyski | 1,128.00 mi (1,815.35 km) |
| Harderwijk to Stara Zagora | 1,154.43 mi (1,857.88 km) |
| Harderwijk to Svilengrad | 1,206.66 mi (1,941.94 km) |
| Harderwijk to Svishtov | 1,088.50 mi (1,751.78 km) |
| Harderwijk to Targovishte | 1,152.02 mi (1,854.00 km) |
| Harderwijk to Teteven | 1,080.44 mi (1,738.80 km) |
| Harderwijk to Troyan | 1,098.58 mi (1,768.00 km) |
| Harderwijk to Tryavna | 1,128.47 mi (1,816.10 km) |
| Harderwijk to Tutrakan | 1,118.29 mi (1,799.71 km) |
| Harderwijk to Varna | 1,205.03 mi (1,939.31 km) |
