Fly nonstop from Seattle to London for $480 round-trip on Norwegian.
This is a new route for Norwegian, with service set to begin on September 17.
Seen below, we found seats departing SEA on Sunday, September 17, returning from LGW on Monday, September 25.
Other dates are also available for travel from September through late March.
See our fare details for booking info.
Need a room in London? Here's what's available for the above dates on Hotelwatchdog.
Stay on top of breaking airfare deals as we find them! Follow @airfarewatchdog on Twitter.
All products and services mentioned on Airfarewatchdog are independently selected by our team of expert travelers. If you buy something through our links, we may earn an affiliate commission.