Today only, WestJet is offering 25% off Econo and Plus base fares to 20 select destinations in Canada, including Montreal.
Thanks to the alert from YYC Deals, that is Chris Myden, you can get in on the Westjet sale.
Non-stop flights from Calgary to Montreal in late April, May, and June can be booked today for $366 roundtrip including taxes.
Go to WestJet.com and manually enter the following code in the ‘coupon code’ box, JLDU4AU. Search for a flight from Calgary to Montreal. According to Myden you want to avoid the dates between May 18-19, 22-23, 2017 and June 29-30, 2017.