Head to Head
| Spain Segunda B Group 2 | 2019/05/12 16:00 | Athletic Bilbao B v Real Unión | L | 2-0 |
| Spain Segunda B Group 2 | 2018/12/22 15:30 | Real Unión v Athletic Bilbao B | W | 1-0 |
| Spain Segunda B Group 2 | 2018/01/20 15:00 | Real Unión v Athletic Bilbao B | W | 1-0 |
| Spain Segunda B Group 2 | 2017/09/02 14:00 | Athletic Bilbao B v Real Unión | L | 4-0 |
| Spain Segunda B Group 2 | 2017/04/02 09:30 | Athletic Bilbao B v Real Unión | W | 1-2 |
| Spain Segunda B Group 2 | 2016/11/05 15:00 | Real Unión v Athletic Bilbao B | W | 3-1 |
| Spain Segunda B Group 2 | 2015/03/14 15:00 | Athletic Bilbao B v Real Unión | W | 1-2 |
| Spain Segunda B Group 2 | 2014/10/26 16:00 | Real Unión v Athletic Bilbao B | D | 1-1 |
Home History
| Spain Segunda B Group 2 | 2019/09/21 14:30 | Osasuna B v Real Unión | L | 4-2 |
| Spain Segunda B Group 2 | 2019/09/15 16:00 | Real Unión v Tudelano | L | 1-2 |
| Spain Segunda B Group 2 | 2019/09/08 17:00 | Salamanca CF UDS v Real Unión | D | 1-1 |
| Spain Segunda B Group 2 | 2019/09/01 16:00 | Real Unión v Cultural Leonesa | D | 1-1 |
| Spain Segunda B Group 2 | 2019/08/24 18:30 | CD Calahorra v Real Unión | L | 2-0 |
| Europe Friendlies | 2019/08/17 09:00 | Amorebieta v Real Unión | L | 3-2 |
| Europe Friendlies | 2019/08/16 17:00 | Real Unión v Lagun Onak | D | 1-1 |
| Europe Friendlies | 2019/08/03 09:30 | Real Sociedad B v Real Unión | L | 1-0 |
Away History
| Spain Segunda B Group 2 | 2019/09/22 15:00 | Tudelano v Athletic Bilbao B | W | 0-3 |
| Spain Segunda B Group 2 | 2019/09/14 16:00 | Athletic Bilbao B v Salamanca CF UDS | W | 4-0 |
| Spain Segunda B Group 2 | 2019/09/08 17:00 | Cultural Leonesa v Athletic Bilbao B | L | 5-2 |
| Spain Segunda B Group 2 | 2019/08/31 16:00 | Athletic Bilbao B v CD Calahorra | D | 0-0 |
| Spain Segunda B Group 2 | 2019/08/25 16:00 | Haro Deportivo v Athletic Bilbao B | W | 1-4 |
| Europe Friendlies | 2019/08/17 17:00 | Barakaldo v Athletic Bilbao B | L | 2-0 |
| Europe Friendlies | 2019/08/14 17:00 | Leioa v Athletic Bilbao B | D | 2-2 |
| Europe Friendlies | 2019/08/07 17:25 | Numancia v Athletic Bilbao B | D | 2-2 |