The illegal strike, centred on Copenhagen Kastrup Airport, means that at least 100 flights are likely to be cancelled on Wednesday.
“We have been hit very hard by the strike on Wednesday morning,” said SAS Denmark spokesman Jens Langergaard.
“42 morning departures from Copenhagen and 59 incoming flights have been cancelled,” he said.
The strike hit around 10,000 passengers on Tuesday, with 113 departures called off. Some 400 travelers were forced to stay overnight at Kastrup after SAS failed to find them hotel rooms in Copenhagen.
“We have simply not been able to find hotel rooms for everyone, so we’re handing out pillows and blankets to people, and opening our lounges to old people and to families with children,” said Langergaard.
SAS Sweden said it could not put a figure on the number of Sweden-based travellers affected. However, with Kastrup serving large parts of southern Sweden and providing connections for passengers from across Sweden, the strike is certain to affect many Swedes. Most of the flights cancelled are to destinations within Europe.
Early on Wednesday, SAS was warning on its homepage that eight flights to and from Stockholm and Gothenburg had been cancelled. Sixteen flights from Stockholm and two from Gothenburg would run as normal.
Monica Hultberg, spokeswoman for SAS Sweden, said that the company was doing all it can to rebook affected passengers. All those whose flights are cancelled and who do not wish to rebook can get their money back.
Passengers are being encouraged to check arrivals and departures on Kastrup’s homepage.
The strike, which breaches contracts between unions and employers, is in response to cabin crew dissatisfaction with a new collective agreement. Staff are reported to be unhappy with staffing levels on SAS planes.