| 1. Round | 07/12/1930 | Arenas de Getxo | - | Real Unión | 1:2 | ||||
| 3. Round | 21/12/1930 | CE Europa | - | Real Unión | 2:1 | ||||
| 4. Round | 28/12/1930 | Real Unión | - | Real Sociedad | 2:4 | ||||
| 7. Round | 18/01/1931 | Real Unión | - | FC Barcelona | 1:1 | ||||
| 8. Round | 25/01/1931 | Racing Santander | - | Real Unión | 4:1 | ||||
| 2. Round | 27/01/1931 | Real Unión | - | Real Madrid | 1:1 | ||||
| 9. Round | 01/02/1931 | Real Unión | - | Athletic Club | 2:3 | ||||
| 10. Round | 08/02/1931 | Real Unión | - | Arenas de Getxo | 2:2 | ||||
| 11. Round | 15/02/1931 | Real Madrid | - | Real Unión | 3:0 |
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