| Bilbao to Karditsa | 1,311.73 mi (2,111.02 km) |
| Bilbao to Kastoria | 1,254.10 mi (2,018.28 km) |
| Bilbao to Katerini | 1,321.22 mi (2,126.29 km) |
| Bilbao to Keratsini | 1,432.56 mi (2,305.49 km) |
| Bilbao to Kerkyra | 1,205.56 mi (1,940.17 km) |
| Bilbao to Kiato | 1,387.97 mi (2,233.73 km) |
| Bilbao to Kifisia | 1,439.43 mi (2,316.54 km) |
| Bilbao to Kilkis | 1,325.70 mi (2,133.52 km) |
| Bilbao to Komotini | 1,451.70 mi (2,336.29 km) |
| Bilbao to Korinthos | 1,398.83 mi (2,251.20 km) |
| Bilbao to Koropi | 1,447.23 mi (2,329.09 km) |
| Bilbao to Korydallos | 1,433.78 mi (2,307.44 km) |
| Bilbao to Kos | 1,645.24 mi (2,647.75 km) |
| Bilbao to Kozani | 1,284.47 mi (2,067.15 km) |
| Bilbao to Lagos | 1,432.65 mi (2,305.62 km) |
