The airline is also offering three-times weekly flights to Montreal, increasing to daily in June, and has upped flights to Toronto to daily, rising to twice-daily from late June.
The launch of the Quebec route means Gatwick passengers are now able to choose from 50 weekly services to six destinations across Canada this summer.
WestJet will operate six flights a week to Vancouver, rising to daily from mid-June, and four flights a week to Halifax, which will also increase to a daily service from mid-July.
This is in addition to the three-times weekly service it offers to Calgary, which will increase to five-times-weekly from mid-June.
