| Azpeitia to Popovo | 1,426.85 mi (2,296.30 km) |
| Azpeitia to Provadia | 1,488.31 mi (2,395.20 km) |
| Azpeitia to Radnevo | 1,425.44 mi (2,294.02 km) |
| Azpeitia to Radomir | 1,272.86 mi (2,048.47 km) |
| Azpeitia to Rakitovo | 1,337.46 mi (2,152.44 km) |
| Azpeitia to Rakovski | 1,377.21 mi (2,216.41 km) |
| Azpeitia to Razgrad | 1,438.85 mi (2,315.61 km) |
| Azpeitia to Razlog | 1,308.03 mi (2,105.07 km) |
| Azpeitia to Ruse | 1,408.06 mi (2,266.06 km) |
| Azpeitia to Samokov | 1,305.96 mi (2,101.74 km) |
| Azpeitia to Sandanski | 1,303.69 mi (2,098.08 km) |
| Azpeitia to Sevlievo | 1,374.99 mi (2,212.83 km) |
| Azpeitia to Shumen | 1,462.32 mi (2,353.37 km) |
| Azpeitia to Silistra | 1,469.61 mi (2,365.10 km) |
| Azpeitia to Sliven | 1,440.06 mi (2,317.56 km) |
