 Shortly after the loan was extended into a third month, Flynn left to join Steve Parkin's Barnsley of the First Division; Stockport gave him a free transfer and promised him a testimonial match, despite his having been with the club for less than the customary ten years.In all Flynn played 460 games for "the Hatters", scoring 19 goals.On 18 July 2014 Stockport held a testimonial for Mike Flynn at their home Edgeley Park the event was attended by over 30 Stockport legends including Kevin Francis, Andy Preece and many others.