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Cheap flights from Seattle-Tacoma International (SEA) to Heathrow (LHR)

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The best prices from Seattle-Tacoma International to Heathrow are usually found in October or April, booked 60 days in advance, depart on a Tuesday or Monday and return on a Friday

How to find the cheapest flight from
Seattle-Tacoma International (SEA) to Heathrow (LHR)

SEA - LHR
Price
$536 - $996
LHR
Temperature
46.4 - 75.2 °F
LHR
Rainfall
1.5 - 2.6 inches
Popular in June High demand for flights, 34% potential price rise
Cheapest in October Best time to find cheap flights, 19% potential price drop
Round-trip from $536 From Seattle-Tacoma International to Heathrow
One-way from $251 One-way flight from Seattle-Tacoma International to Heathrow
Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Seattle-Tacoma International to Heathrow?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 21% when planning your travel around this day of the week.

How far in advance should I book a flight from Seattle-Tacoma International to Heathrow?

To save up to 38% on this flight, we recommend booking at least 51 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle-Tacoma International to Heathrow from $813 1-2 weeks out and tickets from $886 for flights departing within the next 72 hours.

What is the cheapest month to fly from Seattle-Tacoma International to Heathrow?

The best pricing can be found in the month of February. Prices to Heathrow from Seattle-Tacoma International average $634. You can even find prices in February for less than $634, as users have found deals to Heathrow from as low as $394. The month of June appears to be one of the more expensive times to travel to Heathrow from Seattle-Tacoma International. Flying in the targeted month can save you up to 66%.

When is the cheapest time to fly from Seattle-Tacoma International to Heathrow (SEA - LHR)?

When flying from Seattle-Tacoma International to Heathrow, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 9% versus a flight in the evening.

Cheap flights from Seattle-Tacoma International to Heathrow in August, September 2020

The best prices found for SEA to LHR flights for August, September
23 Aug - 1 Sep
$507pp
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
23 Aug - 30 Aug
$511pp
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
27 Aug - 23 Sep
$538pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl

Seattle-Tacoma International to Heathrow 2020 flight deals

Cheap flights to Heathrow from Seattle-Tacoma International found for this year
11 Nov - 19 Nov
$410pp
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
28 Oct - 4 Nov
$411pp
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
12 Oct - 26 Oct
$414pp
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl

Non-stop flights to Heathrow from Seattle-Tacoma International

Save time with Seattle-Tacoma International to Heathrow direct flight deals
14 Sep - 28 Oct
$672pp
SEA
Seattle/Tacoma Intl
Finnair
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Finnair
Non-Stop
SEA
Seattle/Tacoma Intl
17 Nov - 8 Dec
$682pp
SEA
Seattle/Tacoma Intl
British Airways
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
British Airways
Non-Stop
SEA
Seattle/Tacoma Intl
5 Oct - 4 Nov
$692pp
SEA
Seattle/Tacoma Intl
Finnair
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Finnair
Non-Stop
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle-Tacoma International to Heathrow

Late deals on round-trip flights to Heathrow from Seattle-Tacoma International, departing today and this week
28 Jul - 23 Sep
$856pp
SEA
Seattle/Tacoma Intl
Major Airline
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Major Airline
 
1 STOP
SEA
Seattle/Tacoma Intl
28 Jul - 23 Sep
$902pp
SEA
Seattle/Tacoma Intl
British Airways
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
British Airways
Non-Stop
SEA
Seattle/Tacoma Intl
27 Jul - 7 Aug
$924pp
SEA
Seattle/Tacoma Intl
Major Airline
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Major Airline
 
1 STOP
SEA
Seattle/Tacoma Intl

One-way flights to Heathrow from Seattle-Tacoma International

The cheapest one-way flights from Seattle-Tacoma International to Heathrow
7:16 am - 8:45 am
TAP AIR PORTUGAL
3 Stops
41h 29m
SEA - LHR
TAP AIR PORTUGAL
3:15 pm - 12:00 pm
Aer Lingus
1 Stop
12h 45m
SEA - LHR
Aer Lingus
$277
lastminute.com
5:30 am - 8:45 am
Multiple Airlines
3 Stops
43h 15m
SEA - LHR
Multiple Airlines
$280
Kiwi.com

Related info for your journey

Useful info, stats and facts about Seattle-Tacoma International to Heathrow flights.

Flight FAQs

From Seattle-Tacoma International to Heathrow

Are flight prices decreasing from Redmond to Heathrow due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Redmond and Heathrow for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Seattle-Tacoma International to Heathrow for under $500 on Cheapflights?

Yes, there are multiple flights from Seattle-Tacoma International to Heathrow for under $500. The cheapest flight booked recently is on Icelandair for just $410, but on average you can expect to pay $429.

Are there nonstop flights from Seattle-Tacoma International to Heathrow for under $700 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle-Tacoma International to Heathrow under $700. A good price for a nonstop flight from Seattle-Tacoma International to Heathrow is less than $719.

Are there last-minute flights available from Seattle-Tacoma International to Heathrow for under $900?

There are currently 20+ open flights from Seattle-Tacoma International to Heathrow within the next 7 days for less than $900.

Does it rain more in Redmond or Heathrow?

When traveling, we recommend packing in preparation to handle common weather conditions. The rainfall in Redmond is typically less than Heathrow. We can gather that this will continue over the next 9 days.

How long is the flight from Seattle-Tacoma International to Heathrow?

Icelandair can get you from Seattle-Tacoma International to Heathrow in just under 11h 55m. Your travel time can differ by up to .

What is the cheapest airline to fly from Seattle-Tacoma International to Heathrow round-trip?

Currently priced at $410, Icelandair will fly you from Seattle-Tacoma International to Heathrow and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Icelandair is currently priced 38% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Seattle-Tacoma International to Heathrow one-way?

One-way options have recently been found by users for as low as $245 on TAP AIR PORTUGAL. Another option is Aer Lingus, who have fights from $277.

Related searches

Flights to Heathrow from Seattle-Tacoma International
Flights to Seattle-Tacoma International Flights to Heathrow

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Destination information for Heathrow

Things to know before you go. Useful info for your trip from Seattle-Tacoma International to Heathrow
Today's exchange rate
$1 = £0.77
Average temperature for August in Heathrow
75.2 °F
Avg rainfall for August in Heathrow
2.6 ″

Airports servicing Seattle

Airports servicing London

Hourly flight availability from Seattle-Tacoma International to Heathrow

Evening 6 PM to midnight 100% of SEA to LHR departures
Early morning Midnight to 6 AM 0% of SEA to LHR departures
Morning 6 AM to noon 0% of SEA to LHR departures
Afternoon Noon to 6 PM 0% of SEA to LHR departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Seattle-Tacoma International to Heathrow
Sunday
5 daily flights
Monday
0 flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
5 daily flights
Saturday
0 flights
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