| Royston to Smolyan | 1,364.15 mi (2,195.39 km) |
| Royston to Sofia | 1,260.88 mi (2,029.19 km) |
| Royston to Sopot | 1,319.52 mi (2,123.56 km) |
| Royston to Sozopol | 1,448.56 mi (2,331.24 km) |
| Royston to Sredets | 1,430.99 mi (2,302.96 km) |
| Royston to Stamboliyski | 1,333.20 mi (2,145.58 km) |
| Royston to Stara Zagora | 1,364.84 mi (2,196.49 km) |
| Royston to Svilengrad | 1,415.58 mi (2,278.16 km) |
| Royston to Svishtov | 1,303.80 mi (2,098.27 km) |
| Royston to Targovishte | 1,368.88 mi (2,203.00 km) |
| Royston to Teteven | 1,288.86 mi (2,074.22 km) |
| Royston to Troyan | 1,308.31 mi (2,105.52 km) |
| Royston to Tryavna | 1,340.54 mi (2,157.39 km) |
| Royston to Tutrakan | 1,338.77 mi (2,154.54 km) |
| Royston to Varna | 1,424.94 mi (2,293.22 km) |
