Face à face
| Segunda B, Relegation Group 2 | 2020/02/15 15:00 | Arenas Club de Getxo v Real Unión | D | 0-0 |
| Segunda B, Relegation Group 2 | 2019/09/28 14:00 | Real Unión v Arenas Club de Getxo | D | 1-1 |
| Segunda B, Relegation Group 2 | 2019/03/09 17:00 | Arenas Club de Getxo v Real Unión | L | 1-0 |
| Segunda B, Relegation Group 2 | 2018/10/21 15:00 | Real Unión v Arenas Club de Getxo | D | 1-1 |
| Segunda B, Relegation Group 2 | 2018/04/14 16:00 | Arenas Club de Getxo v Real Unión | D | 1-1 |
| Segunda B, Relegation Group 2 | 2017/11/19 16:00 | Real Unión v Arenas Club de Getxo | D | 2-2 |
| Segunda B, Relegation Group 2 | 2017/04/23 15:00 | Real Unión v Arenas Club de Getxo | D | 0-0 |
| Segunda B, Relegation Group 1 | 2016/11/26 16:00 | Arenas Club de Getxo v Real Unión | D | 0-0 |
Home History
| Segunda B, Relegation Group 2 | 2020/11/28 14:45 | Amorebieta v Real Unión | L | 1-0 |
| Segunda B, Relegation Group 2 | 2020/11/22 11:00 | Real Sociedad B v Real Unión | W | 0-1 |
| Segunda B, Relegation Group 2 | 2020/11/18 16:00 | Real Unión v Deportivo Alaves B | L | 1-2 |
| Segunda B, Relegation Group 2 | 2020/11/15 16:00 | Real Unión v Barakaldo | W | 2-1 |
| Segunda B, Relegation Group 2 | 2020/11/08 17:00 | Laredo v Real Unión | L | 1-0 |
| Segunda B, Relegation Group 2 | 2020/10/25 16:00 | Leioa v Real Unión | W | 0-1 |
| Segunda B, Relegation Group 2 | 2020/03/07 15:00 | Athletic Bilbao B v Real Unión | D | 3-3 |
| Segunda B, Relegation Group 2 | 2020/02/29 15:15 | Valladolid B v Real Unión | L | 1-0 |
Away History
| Segunda B, Relegation Group 2 | 2020/11/29 16:00 | Arenas Club de Getxo v Real Sociedad B | D | 1-1 |
| Segunda B, Relegation Group 2 | 2020/11/25 18:00 | Arenas Club de Getxo v Leioa | W | 1-0 |
| Segunda B, Relegation Group 2 | 2020/11/22 16:00 | Barakaldo v Arenas Club de Getxo | D | 0-0 |
| Segunda B, Relegation Group 2 | 2020/11/15 16:00 | Arenas Club de Getxo v Laredo | W | 1-0 |
| Segunda B, Relegation Group 2 | 2020/10/24 14:30 | Deportivo Alaves B v Arenas Club de Getxo | L | 2-0 |
| Segunda B, Relegation Group 2 | 2020/10/18 16:00 | Arenas Club de Getxo v Athletic Bilbao B | D | 1-1 |
| Europe - Matchs amicaux | 2020/09/26 15:00 | Leioa v Arenas Club de Getxo | L | 2-1 |
| Segunda B, Relegation Group 2 | 2020/03/08 11:00 | Burgos v Arenas Club de Getxo | D | 2-2 |