Japan Airlines will return to Seattle in 2019 under an expanded codeshare with Alaska Airlines.

The Oneworld Alliance carrier will offer daily service to Seattle Tacoma International airport from Tokyo Narita with an up to 206-seat Boeing 787-8 from 31 March 2019, JAL says. Seattle will be the carrier's sixth destination on the US West Coast.

JAL will codeshare with Alaska on the new flight, as well as offer connections to many of 40 destinations served by the Seattle-based carrier beyond the airport. Codeshare markets include Anchorage, Boise, Las Vegas and Spokane.

The two carriers already codeshare on Alaska flights to 16 cities beyond Los Angeles and San Francisco.

The new Seattle route will also operate under JAL's immunised joint venture with American Airlines.

JAL previously served Seattle from Tokyo but exited the market in 1992, according to the Airlineroute website.

All Nippon Airways (ANA) and Delta Air Lines serve the Seattle-Tokyo Narita route, schedules show.

Updated with additional details from JAL.

Source: Cirium Dashboard