| Santurce-Antiguo to Popovo | 1,462.96 mi (2,354.40 km) |
| Santurce-Antiguo to Provadia | 1,524.42 mi (2,453.32 km) |
| Santurce-Antiguo to Radnevo | 1,462.38 mi (2,353.48 km) |
| Santurce-Antiguo to Radomir | 1,309.96 mi (2,108.17 km) |
| Santurce-Antiguo to Rakitovo | 1,374.85 mi (2,212.61 km) |
| Santurce-Antiguo to Rakovski | 1,414.28 mi (2,276.06 km) |
| Santurce-Antiguo to Razgrad | 1,474.78 mi (2,373.43 km) |
| Santurce-Antiguo to Razlog | 1,345.56 mi (2,165.47 km) |
| Santurce-Antiguo to Ruse | 1,443.80 mi (2,323.57 km) |
| Santurce-Antiguo to Samokov | 1,343.15 mi (2,161.60 km) |
| Santurce-Antiguo to Sandanski | 1,341.46 mi (2,158.87 km) |
| Santurce-Antiguo to Sevlievo | 1,411.47 mi (2,271.54 km) |
| Santurce-Antiguo to Shumen | 1,498.40 mi (2,411.45 km) |
| Santurce-Antiguo to Silistra | 1,504.96 mi (2,422.01 km) |
| Santurce-Antiguo to Sliven | 1,476.68 mi (2,376.49 km) |
