| Santurce-Antiguo to Karlovo | 1,401.29 mi (2,255.17 km) |
| Santurce-Antiguo to Karnobat | 1,509.71 mi (2,429.64 km) |
| Santurce-Antiguo to Kavarna | 1,565.63 mi (2,519.64 km) |
| Santurce-Antiguo to Kazanlak | 1,431.19 mi (2,303.27 km) |
| Santurce-Antiguo to Knezha | 1,354.84 mi (2,180.41 km) |
| Santurce-Antiguo to Kostinbrod | 1,319.78 mi (2,123.97 km) |
| Santurce-Antiguo to Kozloduy | 1,334.65 mi (2,147.92 km) |
| Santurce-Antiguo to Kyustendil | 1,300.33 mi (2,092.68 km) |
| Santurce-Antiguo to Levski | 1,408.32 mi (2,266.48 km) |
| Santurce-Antiguo to Lom | 1,309.76 mi (2,107.86 km) |
| Santurce-Antiguo to Lovech | 1,390.45 mi (2,237.72 km) |
| Santurce-Antiguo to Lukovit | 1,362.35 mi (2,192.49 km) |
| Santurce-Antiguo to Lyaskovets | 1,440.47 mi (2,318.21 km) |
| Santurce-Antiguo to Mezdra | 1,339.76 mi (2,156.14 km) |
| Santurce-Antiguo to Momchilgrad | 1,449.01 mi (2,331.95 km) |
