| Guaynabo to Smolyan | 5,424.35 mi (8,729.65 km) |
| Guaynabo to Sofia | 5,337.66 mi (8,590.14 km) |
| Guaynabo to Sopot | 5,408.53 mi (8,704.19 km) |
| Guaynabo to Sozopol | 5,557.67 mi (8,944.20 km) |
| Guaynabo to Sredets | 5,534.42 mi (8,906.79 km) |
| Guaynabo to Stamboliyski | 5,406.61 mi (8,701.11 km) |
| Guaynabo to Stara Zagora | 5,456.64 mi (8,781.62 km) |
| Guaynabo to Svilengrad | 5,495.89 mi (8,844.78 km) |
| Guaynabo to Svishtov | 5,421.24 mi (8,724.65 km) |
| Guaynabo to Targovishte | 5,487.56 mi (8,831.37 km) |
| Guaynabo to Teteven | 5,380.27 mi (8,658.71 km) |
| Guaynabo to Troyan | 5,402.93 mi (8,695.17 km) |
| Guaynabo to Tryavna | 5,441.61 mi (8,757.43 km) |
| Guaynabo to Tutrakan | 5,474.59 mi (8,810.50 km) |
| Guaynabo to Varna | 5,552.77 mi (8,936.32 km) |
