WestJet made this announcement:
Following Boeing’s announcement regarding the 737-MAX aircraft, WestJet today announced it will be updating its schedule to remove the aircraft through to June 24, 2020. Any affected guests will be proactively contacted once work is complete.
WestJet has completed more than 98 per cent of its planned departures even while its 13 MAX aircraft remain on the ground.
WestJet aircraft photo gallery: