Not sure if this is the right place for this or not, but WS is consolidating 15% of its network in January due to issues related to omicron. Article mentions staff shortage, and the nasty cold weather engulfing all of Western Canada. Given the high volume of cancellations and delays this really doesn't come as a surprise.
https://www.westjet.com/en-ca/news/2...variant-impact
Will probably be reflected in this week's schedule update.