| Guilherand to Smolyan | 1,021.30 mi (1,643.62 km) |
| Guilherand to Sofia | 930.83 mi (1,498.03 km) |
| Guilherand to Sopot | 1,001.17 mi (1,611.22 km) |
| Guilherand to Sozopol | 1,149.91 mi (1,850.59 km) |
| Guilherand to Sredets | 1,126.77 mi (1,813.36 km) |
| Guilherand to Stamboliyski | 1,000.93 mi (1,610.84 km) |
| Guilherand to Stara Zagora | 1,049.34 mi (1,688.75 km) |
| Guilherand to Svilengrad | 1,090.19 mi (1,754.50 km) |
| Guilherand to Svishtov | 1,014.28 mi (1,632.33 km) |
| Guilherand to Targovishte | 1,080.27 mi (1,738.53 km) |
| Guilherand to Teteven | 972.65 mi (1,565.32 km) |
| Guilherand to Troyan | 995.25 mi (1,601.70 km) |
| Guilherand to Tryavna | 1,033.85 mi (1,663.82 km) |
| Guilherand to Tutrakan | 1,070.13 mi (1,722.21 km) |
| Guilherand to Varna | 1,146.01 mi (1,844.32 km) |
