Delta Air Lines is adding new nonstop flights between Seattle and both Anchorage and Las Vegas from 10 June.
The Atlanta-based carrier will offer once daily service on both routes on a Boeing 757-200. The Anchorage flight will be seasonal and end on 31 August.
Delta says that the flights are timed to connect to its international flights from Seattle, which includes Beijing, Osaka, Shanghai Pudong and both Tokyo Haneda and Narita airports.
Alaska Airlines and United Airlines fly between Seattle and Anchorage, and Alaska and Southwest Airlines fly between Seattle and Las Vegas, according to Innovata schedules.
JetBlue Airways begins flights on the Anchorage route on 16 May.
Delta also codeshares with Alaska on its flights on both routes.