Head to Head
| Spain Tercera Group 4 | 2018/11/24 16:00 | Portugalete v Lagun Onak | L | 2-0 |
| Spain Tercera Group 4 | 2018/05/12 15:00 | Lagun Onak v Portugalete | L | 0-4 |
| Spain Tercera Group 4 | 2017/12/23 16:30 | Portugalete v Lagun Onak | D | 1-1 |
Home History
| Spain Tercera Group 4 | 2019/04/07 16:00 | Sestao River v Lagun Onak | L | 3-1 |
| Spain Tercera Group 4 | 2019/03/31 15:00 | Lagun Onak v JD Somorrostro | D | 0-0 |
| Spain Tercera Group 4 | 2019/03/23 17:15 | SD Deusto v Lagun Onak | L | 3-1 |
| Spain Tercera Group 4 | 2019/03/17 10:15 | Santurtzi v Lagun Onak | D | 1-1 |
| Spain Tercera Group 4 | 2019/03/09 16:00 | Lagun Onak v SD Beasain | D | 1-1 |
| Spain Tercera Group 4 | 2019/03/02 15:00 | Alaves B v Lagun Onak | W | 1-3 |
| Spain Tercera Group 4 | 2019/02/24 16:00 | Lagun Onak v Real Sociedad C | W | 1-0 |
| Spain Tercera Group 4 | 2019/02/16 16:00 | Balmaseda FC v Lagun Onak | L | 2-1 |
Away History
| Spain Tercera Group 4 | 2019/04/06 16:00 | Portugalete v SD Beasain | W | 2-0 |
| Spain Tercera Group 4 | 2019/03/31 14:00 | Alaves B v Portugalete | L | 2-0 |
| Spain Tercera Group 4 | 2019/03/24 10:30 | Portugalete v Real Sociedad C | W | 3-1 |
| Spain Tercera Group 4 | 2019/03/17 16:00 | Balmaseda FC v Portugalete | D | 1-1 |
| Spain Tercera Group 4 | 2019/03/10 10:30 | Portugalete v Zamudio | W | 1-0 |
| Spain Tercera Group 4 | 2019/03/02 16:30 | SD San Pedro v Portugalete | D | 0-0 |
| Spain Tercera Group 4 | 2019/02/24 10:30 | Portugalete v Sodupe | W | 1-0 |
| Spain Tercera Group 4 | 2019/02/17 16:00 | Bermeo v Portugalete | W | 0-3 |