This is some info I got from another message board.
Amadeus.net has LACSA flt#620 flying Havana-Dorval on Tuesdays next Feb. with an A320. I guess it could be the Cubana flight, but in the fall the Cubana flight arrives at Dorval about 17:00. The LACSA flight arrives at 23:15. The Cubana flights still shows on the usual days, but LACSA is in on the Tuesday . Cubana Monday Thursday and Saturday arriving at 17:00 (apprx) and leaving the same night. LACSA is in on Tuesday Thursday and Saturday at about 23:15 and leaves the next morning at 7am. LACSA seems to start the flights on October 31st. I think Cubana starts a week or 2 later.
That's great. In this last year, we will have welcomed Egyptair, Canjet, Cubana, Lacsa and RootsAir!