Air Canada's unionized flight attendants reached an agreement with the country's largest carrier on Tuesday, ending the first strike by its cabin crew in 40 years that had upended travel plans for hundreds of thousands of passengers.

TORONTO (AP) — Air Canada said it will gradually restart operations after reaching an agreement early on Tuesday with the union for 10,000 flight attendants to end a strike that disrupted the travel plans of hundreds of thousands of travelers.

Aviation analytics firm Cirium said that as of Monday afternoon, August 18, Air Canada had called off at least 1,219 domestic flights and 1,339 international flights since last Thursday, when the carrier began gradually suspending its operations ahead of the strike and lockout.

Canadian regulators once again ordered union leaders to end Air Canada's work stoppage on Monday, while employees remain defiant.

The airline said that it would gradually restart operations Tuesday but that a return to "full restoration may require a week or more."

Air Canada and the union representing its cabin crew have reached a tentative deal, with plans to resume flying Tuesday evening.

Air Canada and the union representing 10,000 flight attendants resumed talks late Monday for the first time since the strike began over the weekend. The strike is affecting about 130,000 travelers a day at the peak of the summer travel season.

Air Canada's flight attendant union reached a tentative agreement with the country's largest airline, after a multi-day strike that temporarily halted operations.

El sindicato de 10.000 asistentes de vuelo en huelga de Air Canada y la aerolínea reanudaron las conversaciones el lunes por la noche por primera vez desde

Air Canada on Monday withdrew its third quarter and full-year earnings guidance due to a disruption in operations after its flight attendants went on strike.