As of early 2021, De Havilland announced the suspension of production after a backlog of 19 aircraft had been completed.
[1] As of December 2018, the following customers had outstanding orders listed:[2] Figures for Canadian operators are correct as of 10 February 2025[update].
Two used Q400s, acquired from Scandinavian Airlines System, were modified by Cascade Aerospace of Abbotsford, British Columbia, Canada for France's Sécurité Civile as fire-fighting water bombers in the fire season and as transport aircraft off season.
The National Police of Colombia operates a single De Havilland Dash 8-300 for utility transport.
[41] Neptune Aviation of Missoula, Montana have acquired a Q300 as a prototype for future Q200/Q300 water bombers to replace current P2V aircraft.