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| Year | Name | Direction | From/To | Category |
|---|---|---|---|---|
| 1869 | Richard John Cartwright | Gained | from Liberal-Conservative | Wanted Promotion |
| 1872 | Alfred Gilpin Jones | Gained | from Independent | Changed Beliefs |
| 1873 | Newton LeGayet MacKay | Gained | from Conservative | Changed Beliefs |
| 1874 | Samuel McDonnell | Gained | from Conservative | Changed Beliefs |
| 1883 | John Wallace | Lost | to Liberal-Conservative | Changed Beliefs |
| 1893 | Joseph-Israël Tarte | Gained | from Conservative | Fought Their Leader |
| 1896 | James Domville | Gained | from Conservative | Switched Sides |
| 1900 | John Costigan | Gained | from Liberal-Conservative | Changed Beliefs |
| 1900 | Henri Bourassa | Lost | to Independent | Stood on Principle |
| 1909 | David-Arthur Lafortune | Lost | to Independent Liberal | Fought Their Leader |
| 1911 | Louis-Joseph Papineau | Lost | to Conservative | Switched Sides |
| 1917 | William Stevens Fielding | Lost | to Liberal-Unionist | War & Conscription |
| 1917 | Hugh Guthrie | Lost | to Unionist | War & Conscription |
| 1917 | Frank Broadstreet Carvell | Lost | to Liberal-Unionist | War & Conscription |
| 1917 | ~17 Liberal-Unionist MPs (Conscription Crisis) | Lost | to Unionist | War & Conscription |
| 1922 | William James Hammell | Gained | from Progressive | Changed Beliefs |
| 1925 | William George Baker | Gained | from Saskatchewan Labour | Joined Government |
| 1929 | Charles Agar | Gained | from Progressive | Joined Government |
| 1930 | Thomas Alexander Crerar | Gained | from Progressive / United Farmers | Party Collapsing |
| 1935 | Ernest Edward Perley | Lost | to Conservative | Changed Beliefs |
| 1943 | Édouard Lacroix | Lost | to Bloc populaire canadien | Stood on Principle |
| 1943 | Maxime Raymond | Lost | to Bloc populaire canadien | Started New Party |
| 1944 | ~5 Quebec Liberal MPs oppose conscription | Lost | to Independent Liberal | War & Conscription |
| 1955 | Sam Drover | Lost | to CCF | Changed Beliefs |
| 1962 | Hazen Argue | Gained | from NDP | Lost Leadership Race |
| 1967 | Bud Olson | Gained | from Social Credit | Wanted Promotion |
| 1968 | Lucien Lamoureux | Lost | to Independent | Stood on Principle |
| 1969 | Perry Ryan | Lost | to Progressive Conservative | Changed Beliefs |
| 1971 | Paul Hellyer | Lost | to Independent | Changed Beliefs |
| 1972 | Raymond Rock | Lost | to New Democratic Party | Changed Beliefs |
| 1977 | Jacques Lavoie | Gained | from Progressive Conservative | Switched Sides |
| 1977 | Colin Thatcher | Lost | to Progressive Conservative | Changed Beliefs |
| 1977 | Jack Horner | Gained | from Progressive Conservative | Wanted Promotion |
| 1978 | James Armstrong Richardson | Lost | to Independent | Stood on Principle |
| 1979 | Ralph Wesley Stewart | Lost | to Progressive Conservative | Switched Sides |
| 1980 | Thomas Rideout | Lost | to Progressive Conservative | Stood on Principle |
| 1982 | Peter Ittinuar | Gained | from New Democratic Party | Wanted Promotion |
| 1988 | Donald James Johnston | Lost | to Independent Liberal | Stood on Principle |
| 1990 | Gilles Rocheleau | Lost | to Bloc Québécois | Started New Party |
| 1990 | Jean Lapierre | Lost | to Bloc Québécois | Started New Party |
| 1993 | Glen McPherson | Gained | from Saskatchewan NDP | Switched Sides |
| 1994 | Jag Bhaduria | Lost | to Independent | Kicked Out |
| 1996 | John Nunziata | Lost | to Independent | Stood on Principle |
| 1999 | Bill Matthews | Gained | from Progressive Conservative | Switched Sides |
| 2000 | Diane St-Jacques | Gained | from Progressive Conservative | Switched Sides |
| 2000 | André Harvey | Gained | from Progressive Conservative | Switched Sides |
| 2000 | Rick Laliberte | Gained | from New Democratic Party | Wanted Promotion |
| 2000 | David Price | Gained | from Progressive Conservative | Switched Sides |
| 2001 | Jean-Guy Carignan | Lost | to Independent | Fought Their Leader |
| 2002 | Joe Peschisolido | Gained | from Canadian Alliance | Switched Sides |
| 2003 | Robert Lanctôt | Gained | from Bloc Québécois | Switched Sides |
| 2003 | Scott Brison | Gained | from Prog. Conservative | Party Merged |
| 2004 | John Bryden | Lost | to Conservative | Changed Beliefs |
| 2004 | Keith Martin | Gained | from Canadian Alliance | Changed Beliefs |
| 2004 | Anne Cools | Lost | to Conservative | Changed Beliefs |
| 2004 | Carolyn Parrish | Lost | to Independent | Kicked Out |
| 2005 | Pat O'Brien | Lost | to Independent | Stood on Principle |
| 2005 | Belinda Stronach | Gained | from Conservative | Wanted Promotion |
| 2005 | David Kilgour (2nd crossing) | Lost | to Independent | Stood on Principle |
| 2006 | Frank Branch | Lost | to Independent | Stood on Principle |
| 2006 | David Emerson | Lost | to Conservative | Wanted Promotion |
| 2007 | Wajid Khan | Lost | to Conservative | Wanted Promotion |
| 2007 | Garth Turner | Gained | from Conservative | Kicked Out |
| 2007 | Joan MacAlpine-Stiles and Wally Stiles | Gained | from Progressive Conservative | Switched Sides |
| 2007 | Joe Comuzzi | Lost | to Conservative | Stood on Principle |
| 2011 | Karen Casey | Gained | from Progressive Conservative | Fought Their Leader |
| 2012 | Tom Osborne | Gained | from Progressive Conservative | Changed Beliefs |
| 2012 | Lise St-Denis | Gained | from New Democratic Party | Changed Beliefs |
| 2013 | Hal Perry | Gained | from Progressive Conservative | Switched Sides |
| 2013 | Kelly Lamrock | Lost | to New Democratic Party | Changed Beliefs |
| 2013 | Christopher Mitchelmore and Dale Kirby | Gained | from NDP | Fought Their Leader |
| 2014 | Paul Lane | Gained | from Progressive Conservative | Switched Sides |
| 2015 | Eve Adams | Gained | from Conservative | Switched Sides |
| 2018 | Leona Alleslev | Lost | to Conservative | Changed Beliefs |
| 2020 | Amanda Simard | Gained | from Prog. Conservative | Stood on Principle |
| 2021 | Jenica Atwin | Gained | from Green Party | Party in Crisis |
| 2024 | Fred Tilley | Lost | to Progressive Conservative | Joined Government |
| 2024 | Brendan Maguire | Lost | to Prog. Conservative | Wanted Promotion |
| 2025 | Chris d'Entremont | Gained | from Conservative | Joined Government |
| 2025 | Michael Ma | Gained | from Conservative | Joined Government |
| 2026 | Marilyn Gladu | Gained | from Conservative | Joined Government |
| 2026 | Matt Jeneroux | Gained | from Conservative | Joined Government |
| 2026 | Lori Idlout | Gained | from New Democratic Party | Joined Government |