Winter Destination Schedule (2015-16) from the GMIA:
http://www.cyqm.ca/site/media/gmia/2...02015-2016.pdf
WestJet - Orlando, Cancun
Air Transat - Orlando, Cancun, Varadero, Punta Cana
Sunwing - Orlando, Cancun, Varadaro, Punta Cana, Cayo Coco, Montego Bay
Celebrity Cruises - Miami
or, to look at it another way:
Florida (Orlando) - WestJet, Air Transat, Sunwing
Florida (Miami) - Celebrity Cruises
Cuba (Varadero) - Air Transat, Sunwing
Cuba (Cayo Coco) - Sunwing
Dominican Republic (Punta Cana) - Air Transat, Sunwing
Jamaica (Montego Bay) - Sunwing
Mexico (Cancun) - WestJet, Air Transat, Sunwing
Some of these services have seasons so long, that it borders on a permanent service rather than a seasonal one. The WestJet service to Cancun extends from October 31st to April 30th. That's a full six months!