| | D | Re-Signed (The Calgary Flames re-signed D Ilya Solovyov to a two-way contract.) |
| | RW | Re-Signed (The Calgary Flames re-signed F Cole Schwindt to a two-way contract.) |
| | LW | Signed (The Calgary Flames signed F Jakob Pelletier to a two-way contract.) |
| | D | Signed (The Calgary Flames signed D Jarred Tinordi to a two-way contract.) |
| | D | Signed (The Calgary Flames signed D Yan Kuznetsov to a two-way contract.) |
| | RW | Signed (The Calgary Flames signed F Adam Klapka to a standard contract.) |
| | G | Contract extended (The Calgary Flames signed G Dustin Wolf.) |
| | D | Signed (The Calgary Flames signed D Etienne Morin.) |
| | D | Signed (The Calgary Flames signed D Zayne Perekh.) |
| | RW | Signed (The Calgary Flames signed F Matvei Gridin.) |
| | D | Signed (The Carolina Hurricanes signed D Jake Bean to a standard contract.) |
| | RW | Signed (The Calgary Flames signed F Martin Frk to a two-way contract.) |
| | LW | Signed (The Calgary Flames signed F Ryan Lomberg.) |
| | D | Signed (The Calgary Flames signed D Jonathan Aspirot.) |
| | RW | Signed (The Calgary Flames signed F Anthony Mantha to a standard contract.) |
| | C | Signed (The Calgary Flames signed F Justin Kirkland.) |
| | G | Signed (The Calgary Flames signed G Devin Cooley to a standard contract.) |
| | C | Became Unrestricted Free Agent (F Dillon Dube elected free agency.) |
| | D | Became Unrestricted Free Agent (D Oliver Kylington elected free agency.) |
| | D | Became Unrestricted Free Agent (D Jordan Oesterle elected free agency.) |
| | G | Became Unrestricted Free Agent (G Oscar Dansk elected free agency.) |
| | D | Became Unrestricted Free Agent (D Dennis Gilbert elected free agency.) |
| | RW | Drafted (The Calgary Flames drafted RW Jacob Battaglia) |
| | D | Drafted (The Calgary Flames drafted D Eric Jamieson.) |
| | C | Drafted (The Calgary Flames drafted C Hunter Laing) |
| | RW | Drafted (The Calgary Flames drafted RW Trevor Hoskin) |
| | G | Drafted (The Calgary Flames drafted G Kirill Zarubin) |
| | D | Became Unrestricted Free Agent (D Mark Pysyk elected free agency.) |
| | D | Drafted (The Calgary Flames drafted D Henry Mews) |
| | LW | Drafted (The Calgary Flames drafted LW Andrew Basha) |
| | LW | Became Unrestricted Free Agent (F A.J. Greer elected free agency.) |
| | D | Became Unrestricted Free Agent (D Colton Poolman elected free agency.) |
| | D | Drafted (The Calgary Flames drafted D Zayne Parekh.) |
| | RW | Drafted (The Calgary Flames drafted RW Matvei Gridin) |
| | LW | Traded (The Calgary Flames traded F Andrew Mangiapane to the Washington Capitals.) To |
| | D | Traded (The New Jersey Devils traded D Kevin Bahl to the Calgary Flames.) From |
| | G | Traded (The Calgary Flames traded G Jacob Markstrom to the New Jersey Devils.) To |
| | RW | Sent to minors (The Calgary Flames sent F Adam Klapka to the minors.) |
| | G | Sent to minors (The Calgary Flames sent Dustin Wolf to the minors.) |
| | RW | Sent to minors (The Calgary Flames sent F Matt Coronato to the minors.) |
| | D | Sent to minors (The Calgary Flames sent D Ilya Solovyov to the minors.) |
| | G | Signed (The Calgary Flames signed G Waltteri Ignatjew to a one-year two-way contract.) |
| | RW | Called up from minors (The Calgary Flames recalled F Adam Klapka from the minors.) |
| | D | Called up from minors (The Calgary Flames recalled D Ilya Solovyov from the minors.) |
| | D | Signed (The Calgary Flames signed D Joni Jurmo to an entry-level contract.) |
| | LW | Sent to minors (The Calgary Flames assigned F Jakob Pelletier to the minors.) |
| | | Signed (The Calgary Flames signed D Sam Morton to a two-way contract.) |
| | LW | Activated (The Calgary Flames activated F A.J. Greer from injured reserve.) |
| | D | Signed (The Calgary Flames signed D Hunter Brzustewicz to an entry-level contract.) |
| | G | Called up from minors (The Calgary Flames recalled G Dustin Wolf from the minors.) |
| | D | Traded (The San Jose Sharks traded D Nikita Okhotiuk to the Calgary Flames.) From |
| | D | Sent to minors (The Calgary Flames assigned D Jordan Oesterle to the minors.) |
| | D | Traded (The Vegas Golden Knights traded D Daniil Miromanov to the Calgary Flames.) From |
| | D | Traded (The Calgary Flames traded D Noah Hanifin to the Vegas Golden Knights.) To |
| | C | Suspended (The NHL suspended F Martin Pospisil for three games.) |
| | C | Placed on Injured Reserve (The Calgary Flames placed F Connor Zary on Injured Reserve.) |
| | D | Claimed (The Calgary Flames claimed D Joel Hanley.) |
| | RW | Called up from minors (The Calgary Flames recalled F Matt Coronato from the minors.) |
| | D | Traded (The Calgary Flames traded D Chris Tanev to the Dallas Stars.) To |
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