| Bilbao to Devnya | 1,526.16 mi (2,456.12 km) |
| Bilbao to Dimitrovgrad | 1,444.81 mi (2,325.19 km) |
| Bilbao to Dobrich | 1,535.01 mi (2,470.36 km) |
| Bilbao to Dospat | 1,379.42 mi (2,219.97 km) |
| Bilbao to Dupnitsa | 1,317.49 mi (2,120.29 km) |
| Bilbao to Elhovo | 1,491.29 mi (2,399.99 km) |
| Bilbao to Etropole | 1,353.91 mi (2,178.91 km) |
| Bilbao to Gabrovo | 1,419.86 mi (2,285.04 km) |
| Bilbao to Gorna Oryahovitsa | 1,434.71 mi (2,308.95 km) |
| Bilbao to Gotse Delchev | 1,359.06 mi (2,187.19 km) |
| Bilbao to Harmanli | 1,461.64 mi (2,352.29 km) |
| Bilbao to Haskovo | 1,444.97 mi (2,325.46 km) |
| Bilbao to Ihtiman | 1,349.97 mi (2,172.57 km) |
| Bilbao to Isperih | 1,483.98 mi (2,388.24 km) |
| Bilbao to Kardzhali | 1,439.57 mi (2,316.77 km) |
