Air Transat continues to fly next winter on Sundays. I have checked and they fly all of December January, February and March. Three other airlines fly nonstop during the week. For winter 2025 here is the schedule.

Sunday Air Transat, Westjet, Air Canada
Tuesday WestJet
Thursday WestJet,Sunwing
Friday WestJet
Saturday Air Canada

I checked online this afternoon and they are all there. Good luck.

Drphilsxm