Book Icelandair flights to United Kingdom from USD 509*
Deals on flights in next three months

Seattle (SEA)to
London (LON)
Seattle (SEA)to
London (LON)
Boston (BOS)to
London (LON)
Boston (BOS)to
London (LON)
New York (NYC)to
London (LON)
New York (NYC)to
London (LON)
Boston (BOS)to
Glasgow (GLA)
Boston (BOS)to
Glasgow (GLA)
Denver (DEN)to
London (LON)
Denver (DEN)to
London (LON)
Baltimore (BWI)to
London (LHR)
Seattle (SEA)to
London (LHR)*Fares displayed have been collected within the last 72hrs and may no longer be available at the time of booking. We display fares for Economy Light as standard but it is possible to change your class of service during the booking process. You can also add baggage, meals and extra legroom to your trip during booking.
Plan ahead for your trip to United Kingdom with Icelandair
From | To | Fare type | Dates | Price |
---|---|---|---|---|
Seattle (SEA) | London (LON) | Round trip / Economy | Nov 21 2025 - Nov 30 2025 | From USD 569* Viewed 10 hrs ago |
Boston (BOS) | London (LON) | Round trip / Economy | Nov 10 2025 - Nov 16 2025 | From USD 519* Viewed 15 hrs ago |
New York (NYC) | London (LON) | Round trip / Economy | Oct 21 2025 - Oct 30 2025 | From USD 510* Viewed 15 hrs ago |
Boston (BOS) | Glasgow (GLA) | Round trip / Economy | Oct 06 2025 - Oct 16 2025 | From USD 532* Viewed 13 hrs ago |
Denver (DEN) | London (LON) | Round trip / Economy | Oct 05 2025 - Nov 01 2025 | From USD 619* Viewed 1 day ago |
Seattle (SEA) | London (LHR) | Round trip / Economy | Jun 10 2025 - Jun 16 2025 | From USD 611* Viewed 1 day ago |
Seattle (SEA) | Manchester (MAN) | Round trip / Economy | Oct 04 2025 - Nov 01 2025 | From USD 540* Viewed 10 hrs ago |
Seattle (SEA) | Glasgow (GLA) | Round trip / Economy | Nov 22 2025 - Dec 02 2025 | From USD 617* Viewed 1 day ago |
Boston (BOS) | Manchester (MAN) | Round trip / Economy | Nov 23 2025 - Dec 06 2025 | From USD 516* Viewed 10 hrs ago |
*Fares displayed have been collected within the last 72hrs and may no longer be available at the time of booking. We display fares for Economy Light as standard but it is possible to change your class of service during the booking process. You can also add baggage, meals and extra legroom to your trip during booking.