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Find cheap Icelandair flights to Seattle

CMH — SEA
27 Aug — 3 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest Icelandair flights from United Kingdom to Seattle
Explore the most affordable Icelandair flight options available from United Kingdom to Seattle. Find the lowest fares with prices last updated on 28 July 2026.

Mon 24/821:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Mon 7/915:40
SEA
-
LHR
1 stop20h 40m
Icelandair
Deal found 23/7£454
Tue 25/821:25
LHR
-
SEA
1 stop22h 20m
Icelandair
Mon 7/915:40
SEA
-
LHR
1 stop12h 15m
Icelandair
Deal found 25/7£456
Tue 25/815:40
LGW
-
SEA
1 stop28h 05m
Icelandair
Mon 7/915:40
SEA
-
LGW
1 stop12h 05m
Icelandair
Deal found 25/7£459

Flights to Seattle with Icelandair at a glance

Find detailed information about Icelandair flights from United Kingdom to Seattle. Explore the options provided by Icelandair to plan your journey from United Kingdom to Seattle. Data last updated 28 July 2026.

Popular in

July

Cheapest in

January

Average price

£499

Return from

£452

One-way from

£414
Highest demand for flights to Seattle with Icelandair; 10% potential price increase.
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Best time to find cheap flights to Seattle with Icelandair; 1% potential price drop.
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Average price for flights to Seattle with Icelandair (return).
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Icelandair
  • Icelandair
  • 19/10-27/10
  • 2 total stops
  • 52h 10m total
  • United Kingdom to Seattle
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Icelandair
  • Icelandair
  • 13/10
  • 1 total stop
  • 12h 50m total
  • United Kingdom to Seattle
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Cheapflights Insights

Find cheap Icelandair flights to Seattle

How long is the flight to Seattle with Icelandair?

On average, Icelandair flights from the United Kingdom to Seattle take 12 hours 7 minutes. Flights to Seattle from other popular cities in the United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

When is the best time to book a flight to Seattle with Icelandair?

The best time to book a flight to Seattle with Icelandair is 67 days before departure. On average, fares are higher if you book on the same day as departure.

FAQs about flights to Seattle with Icelandair

  • Which airport do Icelandair flights arrive at when travelling to Seattle?

    Icelandair flights on this route tend to land at Seattle/Tacoma Intl Airport.

  • Is Icelandair the cheapest airline for a flight to Seattle?

    Flight prices will depend on factors like date, time, and cabin class, so it is worth comparing flights before booking. Based on Cheapflights data, the cheapest average return price for flights to Seattle tends to be with Air Canada.

  • Are there alternative airlines other than Icelandair that fly to Seattle?

    Virgin Atlantic, British Airways and Alaska Airlines all fly to Seattle and offer an alternative to Icelandair.

  • How much is a Icelandair flight to Seattle?

    The average price for a return flight with Icelandair is £542, while a one-way flight costs around £502.

See more FAQs

Reviews of Icelandair

See what Cheapflights users have to say about their Icelandair experience.
Icelandair
7.0
Good
716 reviews
Check prices
Overview

Entertainment

6.9

Food

6.1

Comfort

6.9

Boarding

7.2

Crew

8.0

Popular Icelandair flights

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Fly your favorite airline to Seattle/Tacoma Intl. Flight routes are based on user searches made on Cheapflights and were last updated on 28 July 2026.
Icelandair flights from Manchester to Seattle