| Geldern to Smolyan | 1,105.11 mi (1,778.50 km) |
| Geldern to Sofia | 1,001.03 mi (1,611.00 km) |
| Geldern to Sopot | 1,056.49 mi (1,700.26 km) |
| Geldern to Sozopol | 1,181.01 mi (1,900.65 km) |
| Geldern to Sredets | 1,164.36 mi (1,873.86 km) |
| Geldern to Stamboliyski | 1,072.53 mi (1,726.07 km) |
| Geldern to Stara Zagora | 1,100.69 mi (1,771.40 km) |
| Geldern to Svilengrad | 1,152.46 mi (1,854.71 km) |
| Geldern to Svishtov | 1,036.58 mi (1,668.21 km) |
| Geldern to Targovishte | 1,100.82 mi (1,771.60 km) |
| Geldern to Teteven | 1,025.94 mi (1,651.08 km) |
| Geldern to Troyan | 1,044.55 mi (1,681.04 km) |
| Geldern to Tryavna | 1,075.31 mi (1,730.55 km) |
| Geldern to Tutrakan | 1,068.75 mi (1,719.98 km) |
| Geldern to Varna | 1,155.27 mi (1,859.23 km) |
