| Madrid to Karditsa | 1,355.36 mi (2,181.23 km) |
| Madrid to Kastoria | 1,308.15 mi (2,105.26 km) |
| Madrid to Katerini | 1,374.88 mi (2,212.65 km) |
| Madrid to Keratsini | 1,466.84 mi (2,360.65 km) |
| Madrid to Kerkyra | 1,247.52 mi (2,007.70 km) |
| Madrid to Kiato | 1,420.46 mi (2,286.01 km) |
| Madrid to Kifisia | 1,475.26 mi (2,374.20 km) |
| Madrid to Kilkis | 1,386.96 mi (2,232.09 km) |
| Madrid to Komotini | 1,517.64 mi (2,442.41 km) |
| Madrid to Korinthos | 1,431.10 mi (2,303.14 km) |
| Madrid to Koropi | 1,481.54 mi (2,384.32 km) |
| Madrid to Korydallos | 1,468.29 mi (2,362.99 km) |
| Madrid to Kos | 1,679.09 mi (2,702.23 km) |
| Madrid to Kozani | 1,337.20 mi (2,152.01 km) |
| Madrid to Lagos | 1,497.75 mi (2,410.39 km) |
