WestJet yesterday (08JUL09) announced it's major expansion to the US and International market for the Winter season, which sees a 45% increase of capacity on these routes.

It will be adding 11 New destinations, which includes:
Cayo Coco, Holguin, Varadeo; Cozumel, Ixtapa/Zihuatanejo; St. Maarten; Providenciales; Freeport; Lihue; Atlantic City, Miami

Some seasonal routes is also converted to year-round as well. The airline is operating 66 routes this winter season, compared to 51 in previous winter.