Plans for some 110,000 commuters fell through after some 680 workers walked off the job.
Canadian airline WestJet canceled more than 800 flights after mechanics walked off the job, disrupting the travel plans of thousands of people over the Canada Day long weekend.
Some 680 workers have been on strike since Friday after the Calgary-based airline and the Aircraft Mechanics Fraternal Association (AMFA) failed to reach an agreement on wages and working conditions.
WestJet President and CEO Diederik Pen apologized to travelers on Sunday for the “unnecessary work stoppage.”
“I am encouraged by our employees' willingness to overcome adversity and deliver a safe and controlled operation in the future,” Pen said in a statement.
“We continue to maintain our view that the current strike serves no purpose other than to inflict maximum damage on our airline and the country.”
WesJet has cancelled 832 flights since Thursday, more than half of them scheduled for Sunday.
The airline said its fleet of 180 aircraft had been reduced to 32 active aircraft as of Sunday.
WestJet and AMFA have accused each other of failing to negotiate in good faith.
AMFA has argued that the pay increase it is seeking would cost WestJet less than C$8 million ($5.8 million) more than what the company has offered for the first year of its contract.
WestJet has said it offered a 12.5 percent pay increase in the first year of the contract and a compounded 23.5 percent pay increase over the remainder of the five-and-a-half-year term.
The strike, which has disrupted the plans of about 110,000 commuters, took place despite a directive from Canadian Labor Minister Seamus O'Regan on Thursday calling for binding arbitration to resolve the dispute.
In June, union members voted 97.25 percent to reject a tentative pay deal reached with WestJet.
