| Guardamar del Segura to Smolyan | 1,361.58 mi (2,191.25 km) |
| Guardamar del Segura to Sofia | 1,296.86 mi (2,087.09 km) |
| Guardamar del Segura to Sopot | 1,368.34 mi (2,202.13 km) |
| Guardamar del Segura to Sozopol | 1,517.37 mi (2,441.98 km) |
| Guardamar del Segura to Sredets | 1,491.72 mi (2,400.69 km) |
| Guardamar del Segura to Stamboliyski | 1,354.76 mi (2,180.27 km) |
| Guardamar del Segura to Stara Zagora | 1,412.98 mi (2,273.97 km) |
| Guardamar del Segura to Svilengrad | 1,439.30 mi (2,316.33 km) |
| Guardamar del Segura to Svishtov | 1,405.18 mi (2,261.42 km) |
| Guardamar del Segura to Targovishte | 1,464.18 mi (2,356.37 km) |
| Guardamar del Segura to Teteven | 1,345.65 mi (2,165.61 km) |
| Guardamar del Segura to Troyan | 1,368.08 mi (2,201.72 km) |
| Guardamar del Segura to Tryavna | 1,407.49 mi (2,265.14 km) |
| Guardamar del Segura to Tutrakan | 1,471.42 mi (2,368.02 km) |
| Guardamar del Segura to Varna | 1,530.95 mi (2,463.83 km) |
