This mountain was named in 1964 in honour of Flying Officer Stewart M. Flett from Cranbrook, BC. F/O Flett was a navigator with the RCAF. He was killed on 6 November, 1943 when his Halifax Bomber caught fire during a training flight over England.

Frank Morro (Mount Morro), Jim “Moose” Haley (Mount Haley), Stewart Flett, and Len Dingley (Mount Dingley) were members of a Cranbrook based Rover group that explored the mountains of the area together prior to joining the Royal Canadian Air Force during the Second World War. All four were killed in action while serving with Bomber Command. These mountains were named in their honour.