Effective March 11, 2019 WestJet has updated their change and cancel penalty fee structure. The penalty amounts will not change. WestJet change penalty fees can be found here.
The new penalty structure will take effect for tickets purchased on or after March 11, 2019. Tickets issued prior to this date will follow the penalty structure in place at the time of ticket issuance.
The BusinessFlex and PremiumFlex fares still offer no change or refund penalty fees, as well as other benefits such as no fee on checked baggage and seats in the Business or Premium cabin.