| Guillena to Smolyan | 1,652.75 mi (2,659.84 km) |
| Guillena to Sofia | 1,584.31 mi (2,549.69 km) |
| Guillena to Sopot | 1,656.22 mi (2,665.43 km) |
| Guillena to Sozopol | 1,806.23 mi (2,906.84 km) |
| Guillena to Sredets | 1,780.76 mi (2,865.85 km) |
| Guillena to Stamboliyski | 1,644.30 mi (2,646.25 km) |
| Guillena to Stara Zagora | 1,701.68 mi (2,738.59 km) |
| Guillena to Svilengrad | 1,729.99 mi (2,784.14 km) |
| Guillena to Svishtov | 1,689.64 mi (2,719.21 km) |
| Guillena to Targovishte | 1,750.25 mi (2,816.75 km) |
| Guillena to Teteven | 1,632.50 mi (2,627.25 km) |
| Guillena to Troyan | 1,655.14 mi (2,663.70 km) |
| Guillena to Tryavna | 1,694.73 mi (2,727.41 km) |
| Guillena to Tutrakan | 1,754.50 mi (2,823.60 km) |
| Guillena to Varna | 1,817.30 mi (2,924.65 km) |
