Due to the covid-19 pandemic, we do not recommend booking travel with departures between Now and August. This fare has departures later in the year.
Icelandair has round-trip flights from Seattle (SEA) to London (LGW/LHR) for $349-$434 with a connection. Flights October to February. No Friday departures. 7-day minimum stay required.
Cheapest fares require an overnight connection in Reykjavik. This may be a worthwhile itinerary if you want to spend 24-hours in Iceland on the return leg of the trip.
A Carry on bag (20-lbs @ 21.6 x 15.7 x 7.8 inches) and a personal item (15.7 x 11.8 x 5.9 inches) is allowed for free on Icelandair. You can avoid seat selection fees by accepting the randomly assigned seat at the gate.
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