Air Canada has canceled hundreds of flights — many of them international flights — as a potential strike by flight attendants looms.

Air Canada's flight attendants went on strike Saturday, as the airline announced a complete shutdown of operations, creating summer travel chaos for its 130,000 daily passengers. Its full 700-flight daily schedule has been scrapped for Saturday.

Flight attendants are demanding better wages and compensation for unpaid work. Currently, Air Canada only compensates flight attendants for the time they are in the air, but its attendants are seeking pay for the work they do before take-off and after landing, too.