Scandinavian Airlines has cancelled 1,700 flights in September and October.
It blamed the effects of a pilot strike in July and delayed aircraft deliveries.
The airline has cancelled around 4% of its total number of flights for the next two months, according to the news outlet Reuters.
SAS said passengers has already been informed and rebooked onto other flights.
“It is the effects from the strike but also delayed deliveries of aircraft and some other factors,” an SAS spokesperson told Reuters.
The airline was forced to cancel 3,700 flights during the pilot strike, which it claimed threatened its future.
However, SAS, which is in Chapter 11 bankruptcy protection, has secured bridge financing from a US private equity firm to see it through the current crisis.