Head to Head
| Spain Primera Division RFEF Group 1 | 2021/10/15 17:00 | CD Calahorra v Real Unión | W | 2-4 |
| Spain Segunda B Group 2 | 2020/01/11 15:00 | Real Unión v CD Calahorra | D | 0-0 |
| Spain Segunda B Group 2 | 2019/08/24 18:30 | CD Calahorra v Real Unión | L | 2-0 |
| Spain Segunda B Group 2 | 2019/04/28 10:00 | Real Unión v CD Calahorra | L | 0-1 |
| Spain Segunda B Group 2 | 2018/12/08 15:30 | CD Calahorra v Real Unión | D | 1-1 |
| Spain Copa del Rey | 2017/08/30 16:00 | CD Calahorra v Real Unión | L | 1-0 |