HELSINKI — Some 170,000 passengers had their travel hopes dashed over the weekend as a result of the pilots strike at Scandinavian Airlines, with no end in sight.

Nearly 600 flights have been cancelled and thousands of passengers have been stranded and the strike is now in its fourth day.

The flag carrier of Denmark, Norway and Sweden announced further flight cancellations on April 28 as the parties failed to resume talks on a new collective bargaining agreement. It cancelled another 1,213 flights today and tomorrow, hitting some 110,000 passengers.

The open-ended strike started Friday following the collapse of pay negotiations with the SAS Pilot Group, which represents 95% of the company’s pilots in the three countries.

SAS said it “deeply regrets” the distress to clients on its domestic, European and long-haul flights.