| Royan to Smolyan | 1,311.84 mi (2,111.20 km) |
| Royan to Sofia | 1,219.95 mi (1,963.32 km) |
| Royan to Sopot | 1,289.63 mi (2,075.46 km) |
| Royan to Sozopol | 1,437.25 mi (2,313.03 km) |
| Royan to Sredets | 1,414.58 mi (2,276.54 km) |
| Royan to Stamboliyski | 1,290.64 mi (2,077.09 km) |
| Royan to Stara Zagora | 1,337.83 mi (2,153.03 km) |
| Royan to Svilengrad | 1,379.79 mi (2,220.56 km) |
| Royan to Svishtov | 1,299.44 mi (2,091.24 km) |
| Royan to Targovishte | 1,365.89 mi (2,198.19 km) |
| Royan to Teteven | 1,260.69 mi (2,028.89 km) |
| Royan to Troyan | 1,283.12 mi (2,064.98 km) |
| Royan to Tryavna | 1,321.31 mi (2,126.44 km) |
| Royan to Tutrakan | 1,352.80 mi (2,177.12 km) |
| Royan to Varna | 1,430.87 mi (2,302.76 km) |
