Head to Head
| Spain Primera Division RFEF Group 1 | 2025/01/17 19:30 | Sestao River v Real Unión | W | 0-1 |
| Spain Primera Division RFEF Group 1 | 2024/09/28 13:30 | Real Unión v Sestao River | W | 2-1 |
| Spain Primera Division RFEF Group 1 | 2024/04/13 18:00 | Sestao River v Real Unión | L | 3-1 |
| Spain Primera Division RFEF Group 1 | 2024/01/03 18:00 | Real Unión v Sestao River | W | 4-2 |
| Europe Friendlies | 2023/08/05 17:00 | Sestao River v Real Unión | W | 0-1 |
| Spain Segunda B Group 2 | 2017/04/14 15:30 | Sestao River v Real Unión | W | 0-2 |
| Spain Segunda B Group 2 | 2016/11/19 17:00 | Real Unión v Sestao River | W | 1-0 |
| Spain Segunda B Group 2 | 2016/03/06 16:00 | Real Unión v Sestao River | D | 2-2 |
Home History
| Spain Primera Division RFEF Group 1 | 2025/05/24 17:00 | Athletic Bilbao B v Real Unión | L | 4-2 |
| Spain Primera Division RFEF Group 1 | 2025/05/17 17:00 | Real Unión v Osasuna B | D | 1-1 |
| Spain Primera Division RFEF Group 1 | 2025/05/11 10:00 | Zamora CF v Real Unión | L | 1-0 |
| Spain Primera Division RFEF Group 1 | 2025/05/03 16:00 | Real Unión v SD Tarazona | W | 1-0 |
| Spain Primera Division RFEF Group 1 | 2025/04/27 15:00 | Gimnastic v Real Unión | L | 4-1 |
| Spain Primera Division RFEF Group 1 | 2025/04/20 18:00 | Real Unión v Barcelona B | L | 1-3 |
| Spain Primera Division RFEF Group 1 | 2025/04/13 10:00 | Real Unión v Lugo | W | 3-0 |
| Spain Primera Division RFEF Group 1 | 2025/04/06 10:00 | Ponferradina v Real Unión | L | 3-1 |
Away History
| Spain Primera Division RFEF Group 1 | 2025/05/24 17:00 | Sestao River v Ponferradina | L | 0-2 |
| Spain Primera Division RFEF Group 1 | 2025/05/17 17:00 | FC Andorra v Sestao River | W | 1-2 |
| Spain Primera Division RFEF Group 1 | 2025/05/11 17:30 | Sestao River v Gimnastica Segoviana | L | 1-2 |
| Spain Primera Division RFEF Group 1 | 2025/05/04 10:00 | Unionistas de Salamanca CF v Sestao River | D | 0-0 |
| Spain Primera Division RFEF Group 1 | 2025/04/27 10:00 | Sestao River v Ourense | D | 2-2 |
| Spain Primera Division RFEF Group 1 | 2025/04/19 16:00 | Barakaldo v Sestao River | W | 2-3 |
| Spain Primera Division RFEF Group 1 | 2025/04/13 16:00 | Barcelona B v Sestao River | L | 2-0 |
| Spain Primera Division RFEF Group 1 | 2025/04/05 16:00 | Sestao River v Gimnastic | W | 3-2 |