Head to Head
| Spain Segunda B Group 2 | 2021/02/20 17:30 | Real Unión v Real Sociedad B | W | 3-1 |
| Spain Segunda B Group 2 | 2020/11/22 11:00 | Real Sociedad B v Real Unión | W | 0-1 |
| Spain Segunda B Group 2 | 2019/12/15 16:00 | Real Unión v Real Sociedad B | D | 2-2 |
| Europe Friendlies | 2019/08/03 09:30 | Real Sociedad B v Real Unión | L | 1-0 |
| Spain Segunda B Group 2 | 2019/02/24 17:00 | Real Sociedad B v Real Unión | L | 2-1 |
| Spain Segunda B Group 2 | 2018/10/07 15:00 | Real Unión v Real Sociedad B | W | 2-1 |
| Europe Friendlies | 2018/08/18 09:33 | Real Unión v Real Sociedad B | L | 0-3 |
| Spain Segunda B Group 2 | 2018/03/29 10:00 | Real Unión v Real Sociedad B | D | 0-0 |
Home History
| Europe Friendlies | 2022/07/31 17:00 | Real Madrid B v Real Unión | D | 1-1 |
| Spain Primera Division RFEF Group 1 | 2022/05/28 16:30 | Real Unión v Tudelano | W | 3-1 |
| Spain Primera Division RFEF Group 1 | 2022/05/14 17:00 | Real Unión v CF Talavera | W | 3-1 |
| Spain Primera Division RFEF Group 1 | 2022/05/08 15:00 | CF Internacional de Madrid v Real Unión | L | 2-0 |
| Spain Primera Division RFEF Group 1 | 2022/05/01 10:00 | Real Unión v Rayo Majadahonda | W | 1-0 |
| Spain Primera Division RFEF Group 1 | 2022/04/24 10:00 | Unionistas de Salamanca CF v Real Unión | L | 2-1 |
| Spain Primera Division RFEF Group 1 | 2022/04/16 17:00 | Real Unión v Athletic Bilbao B | D | 1-1 |
| Spain Primera Division RFEF Group 1 | 2022/04/10 15:00 | Zamora CF v Real Unión | W | 0-1 |
Away History
| Europe Friendlies | 2022/07/30 09:00 | Real Sociedad B v SD Beasain | D | 0-0 |
| Spain Segunda | 2022/05/27 19:00 | Real Sociedad B v Real Zaragoza | L | 1-2 |
| Spain Segunda | 2022/05/21 18:00 | Huesca v Real Sociedad B | L | 3-2 |
| Spain Segunda | 2022/05/13 19:00 | Real Sociedad B v Almeria | L | 0-2 |
| Spain Segunda | 2022/05/07 14:00 | Fuenlabrada v Real Sociedad B | W | 1-2 |
| Spain Segunda | 2022/05/02 19:00 | Valladolid v Real Sociedad B | W | 1-2 |
| Spain Segunda | 2022/04/23 12:00 | Real Sociedad B v Amorebieta | W | 2-1 |
| Spain Segunda | 2022/04/18 17:00 | Girona v Real Sociedad B | L | 2-0 |