Bemærk: alle datoer i 1988
Adams Division semifinaler
Buffalo Sabres vs. Boston Bruins
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Buffalo | 3 | Boston | 7 | |
| 7. april | Buffalo | 1 | Boston | 4 | |
| 9. april | Boston | 2 | Buffalo | 6 | |
| 10. april | Boston | 5 | Buffalo | 6 | |
| 12. april | Buffalo | 4 | Boston | 5 | |
| 14. april | Boston | 5 | Buffalo | 2 | |
Boston vinder serien i den bedste af syv kampe med 4-2
Hartford Whalers vs. Montreal Canadiens
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Hartford | 3 | Montreal | 4 | |
| 7. april | Hartford | 3 | Montreal | 7 | |
| 9. april | Montreal | 4 | Hartford | 3 | |
| 10. april | Montreal | 5 | Hartford | 7 | |
| 12. april | Hartford | 5 | Montreal | 3 | |
| 14. april | Montreal | 4 | Hartford | 2 | |
Montreal vinder bedst-af-syv-serien 4-2
Patrick Division semifinaler
Philadelphia Flyers vs. Washington Capitals
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Philadelphia | 4 | Washington | 2 | |
| 7. april | Philadelphia | 4 | Washington | 5 | |
| 9. april | Washington | 3 | Philadelphia | 4 | |
| 10. april | Washington | 4 | Philadelphia | 5 | |
| 12. april | Philadelphia | 2 | Washington | 5 | |
| 14. april | Washington | 7 | Philadelphia | 2 | |
| 16. april | Philadelphia | 3 | Washington | 4 | OT |
Washington vinder serien i den bedste af syv kampe 4-3
New Jersey Devils vs. New York Islanders
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | New Jersey | 4 | New York | 3 | |
| 7. april | New Jersey | 2 | New York | 3 | |
| 9. april | New York | 0 | New Jersey | 3 | |
| 10. april | New York | 5 | New Jersey | 4 | |
| 12. april | New Jersey | 4 | New York | 2 | |
| 14. april | New York | 5 | New Jersey | 6 | |
New Jersey vinder serien bedst af syv med 4-2
Norris Division semifinaler
Chicago Blackhawks vs. St. Louis Blues
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Chicago | 1 | St. Louis | 5 | |
| 7. april | Chicago | 2 | St. Louis | 3 | |
| 9. april | St. Louis | 3 | Chicago | 6 | |
| 10. april | St. Louis | 6 | Chicago | 5 | |
| 12. april | Chicago | 3 | St. Louis | 5 | |
St. Louis vinder bedst-af-syv-serien med 4-1
Toronto Maple Leafs vs. Detroit Red Wings
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Toronto | 6 | Detroit | 2 | |
| 7. april | Toronto | 2 | Detroit | 6 | |
| 9. april | Detroit | 6 | Toronto | 3 | |
| 10. april | Detroit | 8 | Toronto | 0 | |
| 12. april | Toronto | 6 | Detroit | 5 | |
| 14. april | Detroit | 5 | Toronto | 3 | |
Detroit vinder bedst-af-syv-serien 4-2
Smythe Division semifinaler
Winnipeg Jets vs. Edmonton Oilers
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Winnipeg | 4 | Edmonton | 7 | |
| 7. april | Winnipeg | 2 | Edmonton | 3 | |
| 9. april | Edmonton | 4 | Winnipeg | 6 | |
| 10. april | Edmonton | 5 | Winnipeg | 3 | |
| 12. april | Winnipeg | 2 | Edmonton | 6 | |
Edmonton vinder bedst-af-syv-serien 4-1
Los Angeles Kings vs. Calgary Flames
| Dato | Borte | Score | Hjem | Score | Noter |
| 6. april | Los Angeles | 2 | Calgary | 9 | |
| 7. april | Los Angeles | 4 | Calgary | 6 | |
| 9. april | Calgary | 2 | Los Angeles | 5 | |
| 10. april | Calgary | 7 | Los Angeles | 3 | |
| 12. april | Los Angeles | 4 | Calgary | 6 | |
Calgary vinder bedst-af-syv-serien 4-1
Divisionsfinaler
Adams Division
Boston Bruins vs. Montreal Canadiens
| Dato | Bortrejse | Score | Hjem | Score | Noter |
| 18. april | Boston | 1 | Montreal | 5 | |
| 20. april | Boston | 4 | Montreal | 3 | |
| 22. april | Montreal | 1 | Boston | 3 | |
| 24. april | Montreal | 0 | Boston | 2 | |
| 26. april | Boston | 4 | Montreal | 1 | |
Boston vinder serien i bedst-af-syv-serien med 4-1
Patrick Division
New Jersey Devils vs. Washington Capitals
| Dato | Borte | Score | Hjem | Score | Noter |
| 18. april | New Jersey | 1 | Washington | 3 | |
| 20. april | New Jersey | 5 | Washington | 2 | |
| 22. april | Washington | 4 | New Jersey | 10 | |
| 24. april | Washington | 4 | New Jersey | 1 | |
| 26. april | New Jersey | 3 | Washington | 1 | |
| 28. april | Washington | 7 | New Jersey | 2 | |
| 30. april | New Jersey | 3 | Washington | 2 | |
New Jersey vinder serien bedst af syv med 4-3
Norris Division
St. Louis Blues vs. Detroit Red Wings
| Dato | Borte | Score | Hjem | Score | Noter |
| 19. april | St. Louis | 4 | Detroit | 5 | |
| 21. april | St. Louis | 0 | Detroit | 6 | |
| 23. april | Detroit | 3 | St. Louis | 6 | |
| 25. april | Detroit | 3 | St. Louis | 1 | |
| 27. april | St. Louis | 3 | Detroit | 4 | |
Detroit vinder bedst-af-syv-serien med 4-1
Smythe-afdelingen
Edmonton Oilers vs. Calgary Flames
| Dato | Borte | Score | Hjem | Score | Noter |
| 19. april | Edmonton | 3 | Calgary | 1 | |
| 21. april | Edmonton | 5 | Calgary | 4 | OT |
| 23. april | Calgary | 2 | Edmonton | 4 | |
| 25. april | Calgary | 4 | Edmonton | 6 | |
Edmonton vinder bedst-af-syv-serien 4-0
Konferencefinaler
Prince of Wales-konference
New Jersey Devils vs. Boston Bruins
| Dato | Borte | Score | Hjem | Score | Noter |
| 2. maj | New Jersey | 3 | Boston | 5 | |
| 4. maj | New Jersey | 3 | Boston | 2 | (OT) |
| 6. maj | Boston | 6 | New Jersey | 1 | |
| 8. maj | Boston | 1 | New Jersey | 3 | |
| 10. maj | New Jersey | 1 | Boston | 7 | |
| 12. maj | Boston | 3 | New Jersey | 6 | |
| 14. maj | New Jersey | 2 | Boston | 6 | |
Boston vinder serien i den syvende bedste række 4-3
Clarence Campbell-konference
Detroit Red Wings vs. Edmonton Oilers
| Dato | Bortrejse | Score | Hjem | Score | Noter |
| 3. maj | Detroit | 1 | Edmonton | 4 | |
| 5. maj | Detroit | 3 | Edmonton | 5 | |
| 7. maj | Edmonton | 2 | Detroit | 5 | |
| 9. maj | Edmonton | 4 | Detroit | 3 | (OT) |
| 11. maj | Detroit | 4 | Edmonton | 8 | |
Edmonton vinder bedst-af-syv-serien 4-1
Finaler
Boston Bruins vs. Edmonton Oilers
| Dato | Bortrejse | Score | Hjem | Score | Noter |
| 18. maj | Boston | 1 | Edmonton | 2 | |
| 20. maj | Boston | 2 | Edmonton | 4 | |
| 22. maj | Edmonton | 6 | Boston | 3 | |
| 24. maj | Edmonton | 3 | Boston | 3 | Spillet blev afbrudt kl. 16:37 i 2. periode på grund af strømsvigt. |
| 26. maj | Boston | 3 | Edmonton | 6 | |
Edmonton vinder bedst-af-syv-serien 4-0