Notable deals
| Minnesota North Stars acquire | Date | Quebec Nordiques acquire | ||
|---|---|---|---|---|
 | Alan Haworth | May 31, 1991 | Guy Lafleur |  |
| Los Angeles Kings acquire | Date | Philadelphia Flyers acquire | ||
|---|---|---|---|---|
 | Jeff Chychrun | May 30, 1991 | 1991 4th round pick (#86-Aris Brimanis) |  |
| Jari Kurri | Steve Kasper | |||
| Steve Duchesne | ||||
| Edmonton Oilers acquire | Date | Philadelphia Flyers acquire | ||
|---|---|---|---|---|
 | Scott Mellanby | May 30, 1991 | Corey Foster | |
| Craig Fisher | Dave Brown | |||
| Craig Berube | Jari Kurri | |||
| San Jose Sharks acquire | Date | New York Rangers acquire | ||
|---|---|---|---|---|
 | Brian Mullen | May 30, 1991 | Tim Kerr |  |
| future considerations | ||||
| Vancouver Canucks acquire | Date | St. Louis Blues acquire | ||
|---|---|---|---|---|
 | Geoff Courtnall | March 5, 1991 | Garth Butcher |  |
| Robert Dirk | Dan Quinn | |||
| Sergio Momesso | ||||
| Cliff Ronning | ||||
| 1992 5th round pick (#110-Brian Loney) | ||||
| Toronto Maple Leafs acquire | Date | Washington Capitals acquire | ||
|---|---|---|---|---|
 | Bob Rouse | January 16, 1991 | Al Iafrate |  |
| Peter Zezel | ||||
| Minnesota North Stars acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
| Chris Dahlquist | December 11, 1990 | Larry Murphy |  |
| Jim E. Johnson | Peter Taglianetti | |||
| Hartford Whalers acquire | Date | New York Islanders acquire | ||
|---|---|---|---|---|
 | Doug Crossman | November 13, 1990 | Ray Ferraro |  |
| Toronto Maple Leafs acquire | Date | Winnipeg Jets acquire | ||
|---|---|---|---|---|
| Dave Ellett | November 10, 1990 | Ed Olczyk |  |
| Paul Fenton | Mark Osborne | |||
| New Jersey Devils acquire | Date | Montreal Canadiens acquire | ||
|---|---|---|---|---|
 | Claude Lemieux | September 4, 1990 | Sylvain Turgeon |  |
| Calgary Flames acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
 | 1990 2nd round pick (#26-Nicolas Perreault) | June 16, 1990 | Joe Mullen | |
| New Jersey Devils acquire | Date | Quebec Nordiques acquire | ||
|---|---|---|---|---|
| Peter Stastny | March 6, 1990 | Craig Wolanin | |
| future considerations (Randy Velischek) | ||||
| Quebec Nordiques acquire | Date | Chicago Blackhawks acquire | ||
|---|---|---|---|---|
| Mario Doyon | March 5, 1990 | Michel Goulet |  |
| Everett Sanipass | Greg Millen | |||
| Dan Vincelette | 1991 6th round pick (#112-Kevin St. Jacques) | |||
| Boston Bruins acquire | Date | Philadelphia Flyers acquire | ||
|---|---|---|---|---|
 | Brian Propp | March 2, 1990 | 1990 2nd round pick (#42-Terran Sandwith) | |
| Vancouver Canucks acquire | Date | Pittsburgh Penguins acquire | ||
|---|---|---|---|---|
| Dave Capuano | January 8, 1990 | Rod Buskas | |
| Andrew McBain | Barry Pederson | |||
| Dan Quinn | Tony Tanti | |||
| Edmonton Oilers acquire | Date | Detroit Red Wings acquire | ||
|---|---|---|---|---|
| Adam Graves | November 2, 1989 | Jimmy Carson |  |
| Petr Klima | Kevin McClelland | |||
| Joe Murphy | 1991 5th round pick (#100-Brad Layzell) | |||
| Jeff Sharples | ||||
| New Jersey Devils acquire | Date | Hartford Whalers acquire | ||
|---|---|---|---|---|
| Sylvain Turgeon | June 17, 1989 | Pat Verbeek | |
| Minnesota North Stars acquire | Date | Washington Capitals acquire | ||
|---|---|---|---|---|
| Mike Gartner | March 7, 1989 | Dino Ciccarelli | |
| Larry Murphy | Bob Rouse | |||
| Los Angeles Kings acquire | Date | New York Islanders acquire | ||
|---|---|---|---|---|
| Kelly Hrudey | February 22, 1989 | Mark Fitzpatrick | |
| Wayne McBean | ||||
| future considerations (Doug Crossman) | ||||
| St. Louis Blues acquire | Date | Philadelphia Flyers acquire | ||
|---|---|---|---|---|
| Peter Zezel | November 28, 1988 | Mike Bullard | |