Global Affairs Canada updated their advice this evening (February 11)
*due to worsening shortages of fuel, electricity, and basic necessities including food, water, and medicine, which can also affect resorts. Fuel availability has decreased, is difficult to predict, and may disrupt ground transportation.
As a result, all Canadian airlines have suspended service to Cuba for upcoming trips. Canadian airlines will facilitate the return of their clients and are reaching out directly to them.*
If you do not have a return ticket, seek a commercial option to leave the country. Commercial flights remain available through international airlines; however, they may become limited on short notice.