Star Alliance has committed to maintaining a presence in Scandinavia despite the defection of SAS to rival SkyTeam as part of an Air France-KLM rescue deal.
SAS plans to exit the Star Alliance on August 31 as part of a restructuring deal designed to bring the carrier out of US Chapter 11 bankruptcy protection.
The airline reported a five per cent year-on-year rise in March carryings to two million yesterday (Monday).
The timeframe for the switch between global airline alliances had previously not been declared.
The United Airlines and Lufthansa-backed Star Alliance said 17 member airlines will continue to offer direct flights to and from Scandinavia after the departure of SAS.
They will operate more than 3,700 flights a month to Scandinavia from 23 hubs worldwide, offering connections to more than 1,100 international destinations.
Star Alliance member airlines may bring additional service to the region in the future.
A statement said: “On behalf of our member airlines, we thank SAS and its employees for contributing to the superior customer experience for which Star Alliance is globally renowned.
“During this transition, the experience of our customers is top of mind.
“Star Alliance, its member airlines, and SAS intend to ensure that this change is seamless for customers, particularly with respect to previously booked flights.
“Members of frequent flyer programmes should consult their individual airline programs directly with specific questions related to mileage accrual and redemption for travel within the Star Alliance network.
“In Scandinavia, Star Alliance and its member airlines will continue to provide customers with a wide choice of travel options and focus on delivering a superior customer experience.”