Starting January 1, 2014, you can earn Skymiles by flying Westjet. If the ticket is sold by Westjet, you can still credit the miles to Skymiles – the flight doesn’t have to be ticketed by Delta (006 ticket stock) to be eligible for mile accrual. However, no matter how your Westjet flight is ticketed, you will not be eligible for either Medallion Qualification Miles (MQM), or for our friends down South, Medallion Qualification Dollars (MQD). Further, you will not get a Medallion tier bonus for those miles.
Here is the accrual chart for Westjet:
I think this is a great opportunity for Canadian flyers. Westjet’s frequent flyer program is a “Dollars” program, whereas Delta Skymiles is an award redemption program. Skymiles allows for more aspirational awards than Westjet does – my favourite being redeeming on Virgin Australia Business Class for relatively cheap.