Round Trip Flights to Stockholm for $457

United Airlines, Lufthansa, and Expedia have round trip airfares from Seattle to Stockholm for $457, with one stop each way. The deal covers a broad travel window from September 2026 through May 2027, offering flexibility for planning. These are basic economy fares that include a personal item and a carry-on bag. The original price was around $603, so this price drops approximately 24% from the typical fare. To book, select travel dates via Booking.com and confirm your flights. This is a significant discount on transatlantic travel, especially given the duration of availability and the multiple carrier options.