De Havilland DH.4 crash, May 31, 1921, High River Alberta
De Havilland DH.4 accident on May 31, 1921 near High River Alberta, Canada with no fatalities.
- Date: May 31, 1921
- Aircraft: De Havilland DH.4
- Location: High River Alberta, Canada
- Fatalities: 0
- Phase of flight: En route
An RCAF De Havilland DH.4, registered G-CYBW, crashed at High River, Alberta, on 31 May 1921. The circumstances are not known.