There are 30 NHL clubs that the Calgary Flames can make trades with – soon to be 31 when the Seattle Kraken join the fun. In advance of the 2021 trade deadline, here is the last swap they have made with the remainder of the league.
The rundown
| Team | Date | Acquired | Sent |
| Anaheim | Nov. 21/13 | 2014 6th rounder (175th, Adam Ollas Mattsson) | F Tim Jackman |
| Arizona | Jun. |