TORONTO — Air Canada suspended all operations as more than 10,000 Air Canada flight attendants went on strike early Saturday after a deadline to reach a deal passed, leaving travelers around the world stranded and scrambling during the peak summer travel season.

What You Need To Know • Air Canada's planes are grounded after more than 10,000 Air Canada flight attendants walked off the job after a deadline to reach a deal passed • Union spokesman Hugh Pouliot confirmed that a strike has started after no deal was reached • Air Canada said it was suspending all operation • A bitter contract fight between Canada's largest airline and the union representing its flight attendants escalated Friday as the union turned down the airline's request to enter into government-directed arbitration

See Full Page