Notable deals
| Toronto Maple Leafs acquire | Date | Washington Capitals acquire | ||
|---|---|---|---|---|
 | Tim Coulis | June 11, 1980 | Mike Palmateer |  |
| Robert Picard | 1980 3rd round pick (#55-Torrie Robertson) | |||
| 1980 2nd round pick (#26-Bob McGill) | ||||
| Quebec Nordiques acquire | Date | Edmonton Oilers acquire | ||
|---|---|---|---|---|
 | Ron Chipperfield | March 11, 1980 | Ron Low |  |
| Los Angeles Kings acquire | Date | New York Islanders acquire | ||
|---|---|---|---|---|
 | Bill Harris | March 10, 1980 | Butch Goring |  |
| Dave Lewis | ||||
| Buffalo Sabres acquire | Date | Los Angeles Kings acquire | ||
|---|---|---|---|---|
 | 1982 1st round pick (#6-Phil Housley) | March 10, 1980 | Jerry Korab | |
| Hartford Whalers acquire | Date | Winnipeg Jets acquire | ||
|---|---|---|---|---|
 | Bobby Hull | February 27, 1980 | future considerations |  |
| Toronto Maple Leafs acquire | Date | Vancouver Canucks acquire | ||
|---|---|---|---|---|
| Bill Derlago | February 18, 1980 | Jerry Butler |  |
| Rick Vaive | Tiger Williams | |||
| Vancouver Canucks acquire | Date | Atlanta Flames acquire | ||
|---|---|---|---|---|
| Ivan Boldirev | February 8, 1980 | Don Lever |  |
| Darcy Rota | Brad Smith | |||
| Toronto Maple Leafs acquire | Date | Colorado Rockies acquire | ||
|---|---|---|---|---|
| Pat Hickey | December 29, 1979 | Lanny McDonald |  |
| Wilf Paiement | Joel Quenneville | |||
| Colorado Rockies acquire | Date | New York Rangers acquire | ||
|---|---|---|---|---|
| Lucien DeBlois | November 2, 1979 | Barry Beck |  |
| Pat Hickey | ||||
| Mike McEwen | ||||
| Dean Turner | ||||
| future considerations (Bob Crawford) | ||||
| Montreal Canadiens acquire | Date | Winnipeg Jets acquire | ||
|---|---|---|---|---|
 | cash | October 4, 1979 | Ron Wilson | |
| Minnesota North Stars acquire | Date | Edmonton Oilers acquire | ||
|---|---|---|---|---|
 | 1979 2nd round pick (#42-Neal Broten) | August 9, 1979 | Dave Semenko | |
| 1979 3rd round pick (#63-Kevin Maxwell) | 1979 3rd round pick (#48-Mark Messier) | |||
| Detroit Red Wings acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | Pete Mahovlich | August 3, 1979 | Nick Libett |  |
| St. Louis Blues acquire | Date | Philadelphia Flyers acquire | ||
|---|---|---|---|---|
 | Blake Dunlop | June 7, 1979 | Phil Myre |  |
| Rick Lapointe | ||||
| Minnesota North Stars acquire | Date | Washington Capitals acquire | ||
|---|---|---|---|---|
| 1979 1st round pick (#10-Tom J. McCarthy) | October 18, 1978 | Dennis Maruk | |
| Boston Bruins acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | Jean Pronovost | September 6, 1978 | Gregg Sheppard | |
| Vancouver Canucks acquire | Date | Chicago Blackhawks acquire | ||
|---|---|---|---|---|
| Thomas Gradin | June 16, 1978 | 1979 or 1980 2nd round pick (Blackhawks option) (1980 #28-Steve Ludzik) |  |
| Toronto Maple Leafs acquire | Date | Detroit Red Wings acquire | ||
|---|---|---|---|---|
| Dan Maloney | March 13, 1978 | 1978 2nd round pick (#31-Al Jensen) | |
| 1980 2nd round pick (#25-Craig Muni) | 1978 1st round pick (#12-Brent Peterson) | |||
| Errol Thompson | ||||
| 1980 1st round pick (#11-Mike Blaisdell) | ||||
| Montreal Canadiens acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
| Pierre Larouche | November 29, 1977 | Peter Lee | |
| future considerations (rights to Peter Marsh) | Pete Mahovlich | |||
| St. Louis Blues acquire | Date | New York Rangers acquire | ||
|---|---|---|---|---|
| Derek Sanderson | October 30, 1975 | 1977 1st round pick (#8-Lucien DeBlois) | |
| Buffalo Sabres acquire | Date | Atlanta Flames acquire | ||
|---|---|---|---|---|
| Jacques Richard | October 1, 1975 | Larry Carriere | |
| 1976 1st round pick (#15-Greg Carroll) | ||||
| cash | ||||