During the season, an agreement was reached whereby four of the WHA's teams, the Edmonton Oilers, Quebec Nordiques, Winnipeg Jets and New England Whalers would be admitted to the National Hockey League (NHL) as expansion teams for the 1979–80 NHL season, and the WHA would cease operations.
Prelims
Semi-Finals
Finals
SemifinalsBest of 7-game series | |||||||||||||||||||
| Date | Opponent | Result | Score | OT | Series | ||||||||||||||
| 4/26 | vs New England (4) | W | 6-2 | 1-0 | |||||||||||||||
| 4/27 | vs New England (4) | W | 9-5 | 2-0 | |||||||||||||||
| 4/29 | at New England (4) | L | 1-4 | 2-1 | |||||||||||||||
| 5/1 | at New England (4) | L | 4-5 | 2-2 | |||||||||||||||
| 5/3 | vs New England (4) | W | 5-2 | 3-2 | |||||||||||||||
| 5/6 | at New England (4) | L | 4-8 | 3-3 | |||||||||||||||
| 5/8 | vs New England (4) | W | 6-3 | 4-3 | |||||||||||||||
WHA FinalsBest of 7-game series | |||||||||||||||||||
| Date | Opponent | Result | Score | OT | Series | ||||||||||||||
| 5/11 | vs Winnipeg (3) | L | 1-3 | 0-1 | |||||||||||||||
| 5/13 | vs Winnipeg (3) | L | 2-3 | 0-2 | |||||||||||||||
| 5/15 | at Winnipeg (3) | W | 8-3 | 1-2 | |||||||||||||||
| 5/16 | at Winnipeg (3) | L | 2-3 | 1-3 | |||||||||||||||
| 5/18 | vs Winnipeg (3) | W | 10-2 | 2-3 | |||||||||||||||
| 5/20 | at Winnipeg (3) | L | 3-7 | 2-4 | |||||||||||||||