| 1. Round | 23/07/1988 | Lausanne Sports | - | FC Aarau | 0:2 |  |
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| 3. Round | 30/07/1988 | FC Lugano | - | FC Aarau | 2:1 | ||||
| 4. Round | 06/08/1988 | FC Aarau | - | Neuchâtel Xamax FC | 1:1 | ||||
| 5. Round | 10/08/1988 | FC Wettingen | - | FC Aarau | 0:0 | ||||
| 6. Round | 13/08/1988 | FC Aarau | - | Servette FC | 2:2 | ||||
| 7. Round | 20/08/1988 | Grasshopper Club Zürich | - | FC Aarau | 1:0 | ||||
| 8. Round | 27/08/1988 | FC Aarau | - | FC St. Gallen | 5:0 | ||||
| 9. Round | 31/08/1988 | FC Aarau | - | BSC Young Boys | 2:1 | ||||
| 10. Round | 10/09/1988 | FC Sion | - | FC Aarau | 2:0 |  |
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| 11. Round | 14/09/1988 | FC Aarau | - | AC Bellinzona | 2:1 | ||||
| 12. Round | 24/09/1988 | FC Aarau | - | Lausanne Sports | 1:1 | ||||
| 14. Round | 09/10/1988 | FC Aarau | - | FC Lugano | 2:2 | ||||
| 15. Round | 12/10/1988 | Neuchâtel Xamax FC | - | FC Aarau | 1:1 | ||||
| 16. Round | 23/10/1988 | FC Aarau | - | FC Wettingen | 0:2 | ||||
| 17. Round | 30/10/1988 | Servette FC | - | FC Aarau | 1:0 | |
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| 18. Round | 06/11/1988 | FC Aarau | - | Grasshopper Club Zürich | 1:2 | ||||
| 19. Round | 20/11/1988 | FC St. Gallen | - | FC Aarau | 2:2 | |
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| 21. Round | 04/12/1988 | FC Aarau | - | FC Sion | 4:1 | ||||
| 22. Round | 11/12/1988 | AC Bellinzona | - | FC Aarau | 1:0 |
Switzerland