WestJet released a promo code that is only available for use today and that code offers $350 off business class fares to Europe. The code is good for travel until May 19 which means you can use on the following routes and dates:
Calgary or Toronto to London: Now – May 19, 2020
Vancouver to London: April 26 – May 19, 2020
Calgary to Paris: March 12 – May 19, 2020
Calgary to Dublin: May 3-19, 2020
It looks like the code works in both directions so the savings is actually $700. Here is Calgary to Paris from March 22 to 31:
Use P62ST42 when you book online at WestJet or simply visit this page on WestJet and the code will be automatically filled in for you.