Keiran Flynn appeared on Coronation Street in three roles:
- Photographer Ben Cunningham in January and February 1994
- Freshco Regional Manager Aiden O'Donnell, appearing intermittently between October 1998 and April 1999
- PC Paul Harker in July and December 2017.
His other credits include roles in In Suspicious Circumstances, All Quiet on the Preston Front, Wing and a Prayer, Casualty, Doctors, The Bill, Wire in the Blood, Vincent, Jekyll and Downton Abbey, along with a part in the 2005 feature film Pierrepoint.