| Port Royal to Smolyan | 5,472.22 mi (8,806.68 km) |
| Port Royal to Sofia | 5,371.11 mi (8,643.96 km) |
| Port Royal to Sopot | 5,433.21 mi (8,743.91 km) |
| Port Royal to Sozopol | 5,565.80 mi (8,957.29 km) |
| Port Royal to Sredets | 5,547.70 mi (8,928.17 km) |
| Port Royal to Stamboliyski | 5,443.90 mi (8,761.11 km) |
| Port Royal to Stara Zagora | 5,479.54 mi (8,818.46 km) |
| Port Royal to Svilengrad | 5,528.91 mi (8,897.92 km) |
| Port Royal to Svishtov | 5,421.01 mi (8,724.27 km) |
| Port Royal to Targovishte | 5,486.36 mi (8,829.45 km) |
| Port Royal to Teteven | 5,402.60 mi (8,694.64 km) |
| Port Royal to Troyan | 5,422.84 mi (8,727.21 km) |
| Port Royal to Tryavna | 5,456.34 mi (8,781.13 km) |
| Port Royal to Tutrakan | 5,456.18 mi (8,780.88 km) |
| Port Royal to Varna | 5,542.50 mi (8,919.79 km) |
