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SEA - LHR
Find cheap flights from Seattle/Tacoma Airport to London Heathrow Airport
One-way
Economy
Search hundreds of travel sites at once for deals on flights to London Heathrow Airport
Good to know
Low season |
October | Best time to beat the crowds with an average 19% drop in price. |
|---|---|---|
High season |
June | Most popular time to fly with an average 34% increase in price. |
Average price of a round-trip |
$558 | (avg. price over the last 2 weeks) |
Good deal for a round-trip |
$597 | or less |
When to book flights from Seattle/Tacoma Intl to London Heathrow
Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days
Top tips for finding a cheap flight
- Looking for a cheap flight? 25% of our users found flights on this route for $514 or less.
- The cheapest flight from Seattle/Tacoma Airport to London Heathrow Airport was found 89 days before departure, on average.
- Book at least 3 weeks before departure in order to get a below-average price.
- High season is considered to be May, June and July. The cheapest month to fly is October.
- Morning departure is around 25% cheaper than an evening flight, on average*.
FAQs for booking Seattle/Tacoma Airport to London Heathrow Airport flights
Are flight prices cheaper from Seattle/Tacoma Airport to London Heathrow Airport because of Coronavirus (COVID-19)?
How long does a flight from Seattle/Tacoma Airport to London Heathrow Airport take?
How many flights are there between Seattle/Tacoma Airport and London Heathrow Airport?
Which airlines provide the cheapest flights from Seattle/Tacoma Airport to London Heathrow Airport?
Do I need a passport to fly between Seattle/Tacoma Airport and London Heathrow Airport?
Which airlines fly most frequently between Seattle/Tacoma Airport and London Heathrow Airport?
What’s the cheapest day of the week to fly Seattle/Tacoma Airport to London Heathrow Airport?
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
Book cheap flights from Seattle/Tacoma Airport to London Heathrow Airport (round-trip)
Icelandair
Tue, Nov 3
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
12h 20m
Tue, Nov 10
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 45m
Trip: 8 days
Based on null reviews
Icelandair
Tue, Sep 22
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Tue, Sep 29
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 8 days
Based on null reviews
Icelandair
Mon, Sep 14
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
11h 55m
Tue, Sep 29
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 50m
Trip: 16 days
Based on null reviews
Icelandair
Tue, Nov 3
SEA
Seattle/Tacoma Airport
LHR
London Heathrow Airport
12h 20m
Tue, Nov 10
LHR
London Heathrow Airport
SEA
Seattle/Tacoma Airport
12h 45m
Trip: 8 days
Based on null reviews
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Book cheap flights from Seattle/Tacoma Airport to London Heathrow Airport (one-way)
Based on null reviews
Based on null reviews
Based on null reviews
Based on null reviews
Show more results
Top airlines flying Seattle/Tacoma Intl to London Heathrow
Scores according to KAYAK customer reviews
7.3
Icelandair
Overall score based on 9,379 reviews
7.2
Boarding
7.3
Comfort
8.1
Crew
7.6
Entertainment
6.2
Food
Seattle/Tacoma Airport - London Heathrow Airport Flights
Departure:
Seattle/Tacoma Airport (SEA) United States
Destination:
London Heathrow Airport (LHR) United Kingdom
Return flight deals:
Browse origins:
Browse destinations:
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.
We attempt to get accurate prices, however, prices are not guaranteed.
We attempt to get accurate prices, however, prices are not guaranteed.
Here's why:
We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.
We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.
Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.
If you have more questions or if you have a bad price to report to us,
please send us an
email
and someone from our team will get back to you promptly.
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last
72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may
not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags.
Please check the carriers' sites.
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