What are the cheapest airlines flying from London Heathrow Airport to Seattle round-trip?

According to our current data, Air France (£520), Lufthansa (£521), and Virgin Atlantic (£522) offers the cheapest pricing from London Heathrow Airport to Seattle. Air France is priced at 14% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from London Heathrow Airport to Seattle one-way?

The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as £414. However, be on the lookout for offers from Aer Lingus and WestJet, as they are both options that can get you from London Heathrow Airport to Seattle for a low price.

What are the cheapest flights from London Heathrow Airport to Seattle?

The cheapest flight price from London Heathrow Airport to Seattle is £459. On average you can expect to pay £2,151. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for £452.

What are the most reliable airlines from London Heathrow Airport to Seattle?

Consider Air France (73%), Delta (73%) or Virgin Atlantic (73%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Seattle.

What are the most popular airlines that fly from London Heathrow Airport to Seattle?

When booking a flight from London Heathrow Airport to Seattle, you may want to consider flying on Air Canada, Air France or Finnair as they are the most popular for this route.

What is the cheapest day to fly round-trip from London Heathrow Airport to Seattle?

Users have found that flying from London Heathrow Airport to Seattle on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from London Heathrow Airport to Seattle?

Find a great deal and save up to 38% by booking at least 44 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London Heathrow Airport to Seattle within the next two weeks, with the cheapest ticket starting at £593.

What is the cheapest month to fly from London Heathrow Airport to Seattle?

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, January can be a great choice for travel to Seattle. Flights to Seattle from London Heathrow Airport in January are about £603 on average during January, but can be found for as low as £346.

What airport do you fly into for flights to Seattle from London Heathrow?

If you book a flight to Seattle from London Heathrow, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 10 flights from London Heathrow to Seattle/Tacoma Intl per day from 12 different airlines.

Can I find deals for flights from Heathrow to Seattle that include hotel bookings?

Yes. In addition to deals on Heathrow to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Heathrow to Seattle?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Seattle.

Can I find deals for business class flights from Heathrow to Seattle?

Yes. Cheapflights offers flight deals from Heathrow to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£414+ Flights from London Heathrow Airport to Seattle

The best prices from London Heathrow to Seattle/Tacoma Intl are usually found in April or January, booked 54 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Seattle

Round-trip from	£515
One-way from	£414
Popular in	July
Cheapest in	April
Average price	£675

27/1-11/2
4 total stops
36h 45m total
London to Seattle

Search Deals

Icelandair
21/5
1 total stop
15h 35m total
London to Seattle

Search Deals

High demand for flights, 15% potential price rise

Search Deals

Best time to find cheap flights, 2% potential price drop

Search Deals

Average for round-trip flights in December 2024

Search Deals

Find flight deals from Heathrow to Seattle

Cheapest flights from Heathrow to Seattle
Explore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2024.

Tue 31/1209:10LHR - SEA

1 stop33h 35mDelta

Fri 31/106:00SEA - LHR

2 stops18h 45mDelta

Deal found 17/12£620

Tue 31/1213:15LHR - SEA

Nonstop10h 00mVirgin Atlantic

Fri 31/117:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 17/12£650

Tue 31/1211:35LHR - SEA

2 stops31h 55mLufthansa

Fri 31/106:10SEA - LHR

2 stops17h 20mLufthansa

Deal found 17/12£683

Mon 30/1210:40LHR - SEA

1 stop18h 38mIberia

Mon 6/114:13SEA - LHR

1 stop32h 07mIberia

Deal found 16/12£705

Mon 30/1210:40LHR - SEA

1 stop18h 39mBritish Airways

Mon 6/114:13SEA - LHR

1 stop32h 07mBritish Airways

Deal found 16/12£706

Tue 31/1211:35LHR - SEA

2 stops31h 55mUnited Airlines

Fri 31/109:00SEA - LHR

2 stops14h 55mUnited Airlines

Deal found 17/12£715

Tue 24/1206:30LHR - SEA

1 stop13h 22mKLM

Tue 7/117:45SEA - LHR

Nonstop9h 25mKLM

Deal found 16/12£717

Tue 24/1213:15LHR - SEA

Nonstop10h 00mAir France

Tue 7/117:45SEA - LHR

Nonstop9h 25mAir France

Deal found 16/12£724

Tue 31/1213:10LHR - SEA

2 stops29h 45mAmerican Airlines

Thu 30/100:45SEA - LHR

1 stop23h 30mAmerican Airlines

Deal found 17/12£727

Tue 24/1213:00LHR - SEA

1 stop13h 25mMultiple Airlines

Tue 7/115:10SEA - LHR

1 stop13h 50mMultiple Airlines

Deal found 16/12£754

Tue 24/1213:25LHR - SEA

2 stops16h 35mAir Canada

Sun 29/1219:15SEA - LHR

2 stops30h 05mAir Canada

Deal found 17/12£807

Tue 24/1206:00LHR - SEA

2 stops23h 15mSWISS

Tue 31/1210:56SEA - LHR

2 stops37h 09mSWISS

Deal found 16/12£947

Best flights from Heathrow to Seattle
Discover carefully curated flight deals from Heathrow to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 December 2024.

Mon 27/106:30LHR - SEA

2 stops19h 55mMultiple Airlines

Tue 11/209:20SEA - LHR

2 stops16h 50mMultiple Airlines

Deal found 16/12£515

Mon 17/213:15LHR - SEA

Nonstop10h 00mAir France

Sun 23/221:40SEA - LHR

1 stop28h 20mAir France

Deal found 15/12£520

Mon 27/111:10LHR - SEA

1 stop34h 10mLufthansa

Tue 11/210:35SEA - LHR

2 stops14h 45mLufthansa

Deal found 16/12£521

Mon 27/113:15LHR - SEA

Nonstop10h 00mVirgin Atlantic

Tue 11/217:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 16/12£522

Mon 27/108:55LHR - SEA

2 stops21h 58mSWISS

Tue 11/215:25SEA - LHR

2 stops18h 25mSWISS

Deal found 16/12£524

Mon 27/114:50LHR - SEA

2 stops37h 41mAustrian Airlines

Tue 11/208:00SEA - LHR

1 stop18h 50mAustrian Airlines

Deal found 16/12£525

Mon 27/106:30LHR - SEA

1 stop13h 40mUnited Airlines

Tue 11/209:20SEA - LHR

1 stop14h 05mUnited Airlines

Deal found 16/12£529

Thu 24/413:05LHR - SEA

1 stop12h 45mIcelandair

Fri 16/515:45SEA - LHR

1 stop12h 10mIcelandair

Deal found 16/12£532

Mon 27/106:30LHR - SEA

1 stop13h 21mDelta

Tue 11/217:45SEA - LHR

Nonstop9h 25mDelta

Deal found 16/12£533

Mon 27/106:30LHR - SEA

2 stops22h 51mBritish Airways

Thu 6/210:33SEA - LHR

1 stop13h 42mBritish Airways

Deal found 16/12£540

Tue 18/209:25LHR - SEA

Nonstop9h 55mFinnair

Thu 27/218:50SEA - LHR

Nonstop9h 25mFinnair

Deal found 16/12£548

Sun 19/120:25LHR - SEA

1 stop23h 26mKLM

Fri 31/119:32SEA - LHR

Nonstop9h 38mKLM

Deal found 17/12£550

Direct flights from Heathrow to Seattle
Explore direct flight options from Heathrow to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 December 2024.

Mon 27/113:15LHR - SEA

Nonstop10h 00mVirgin Atlantic

Tue 11/217:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 16/12£522

Tue 21/113:15LHR - SEA

Nonstop10h 00mAir France

Mon 27/117:45SEA - LHR

Nonstop9h 25mAir France

Deal found 15/12£523

Wed 12/215:00LHR - SEA

Nonstop9h 55mBritish Airways

Wed 19/218:50SEA - LHR

Nonstop9h 25mBritish Airways

Deal found 17/12£529

Tue 18/209:25LHR - SEA

Nonstop9h 55mFinnair

Thu 27/218:50SEA - LHR

Nonstop9h 25mFinnair

Deal found 16/12£548

Mon 17/215:00LHR - SEA

Nonstop9h 55mIberia

Thu 27/218:50SEA - LHR

Nonstop9h 25mIberia

Deal found 16/12£556

Mon 27/113:15LHR - SEA

Nonstop10h 00mDelta

Fri 7/217:45SEA - LHR

Nonstop9h 25mDelta

Deal found 16/12£571

Mon 27/115:00LHR - SEA

Nonstop9h 55mMultiple Airlines

Mon 10/218:50SEA - LHR

Nonstop9h 25mMultiple Airlines

Deal found 16/12£590

Fri 16/517:00LHR - SEA

Nonstop10h 35mKLM

Mon 2/619:55SEA - LHR

Nonstop9h 35mKLM

Deal found 15/12£596

Mon 10/215:00LHR - SEA

Nonstop9h 55mAmerican Airlines

Mon 24/218:50SEA - LHR

Nonstop9h 25mAmerican Airlines

Deal found 17/12£777

Last-minute flights from Heathrow to Seattle
Discover last-minute flight deals from Heathrow to Seattle. Data last updated 17 December 2024 and is based on user searches.

Sun 22/1219:30LHR - SEA

2 stops36h 54mScandinavian Airlines

Mon 30/1207:20SEA - LHR

2 stops24h 40mScandinavian Airlines

Deal found 16/12£1,071

Mon 23/1220:15LHR - SEA

1 stop25h 05mLufthansa

Mon 30/1210:35SEA - LHR

1 stop15h 35mLufthansa

Deal found 16/12£743

Mon 23/1215:00LHR - SEA

Nonstop9h 55mAmerican Airlines

Mon 30/1218:50SEA - LHR

Nonstop9h 25mAmerican Airlines

Deal found 16/12£1,137

Tue 24/1206:30LHR - SEA

1 stop13h 22mKLM

Tue 7/117:45SEA - LHR

Nonstop9h 25mKLM

Deal found 16/12£717

Tue 24/1213:15LHR - SEA

Nonstop10h 00mAir France

Tue 7/117:45SEA - LHR

Nonstop9h 25mAir France

Deal found 16/12£724

Tue 24/1208:40LHR - SEA

2 stops33h 54mIberia

Tue 7/113:35SEA - LHR

1 stop34h 40mIberia

Deal found 16/12£738

Tue 24/1213:00LHR - SEA

1 stop13h 25mMultiple Airlines

Tue 7/115:10SEA - LHR

1 stop13h 50mMultiple Airlines

Deal found 16/12£754

Tue 24/1207:40LHR - SEA

1 stop13h 40mUnited Airlines

Tue 31/1205:00SEA - LHR

2 stops17h 40mUnited Airlines

Deal found 16/12£799

Tue 24/1206:30LHR - SEA

1 stop13h 22mDelta

Tue 31/1217:45SEA - LHR

Nonstop9h 25mDelta

Deal found 16/12£808

Tue 24/1206:20LHR - SEA

1 stop13h 00mVirgin Atlantic

Tue 31/1217:45SEA - LHR

Nonstop9h 25mVirgin Atlantic

Deal found 16/12£821

Tue 24/1209:25LHR - SEA

Nonstop9h 55mBritish Airways

Tue 31/1218:50SEA - LHR

Nonstop9h 25mBritish Airways

Deal found 16/12£822

Tue 24/1206:00LHR - SEA

2 stops23h 15mSWISS

Tue 31/1210:56SEA - LHR

2 stops37h 09mSWISS

Deal found 16/12£947

One-way flights from Heathrow to Seattle
Search for one-way flight options from Heathrow to Seattle. Find affordable one-way fares based on user searches. Data last updated 17 December 2024.

Wed 21/513:05LHR - SEA

1 stop15h 35mIcelandair

Deal found 16/12£414

Mon 17/212:10LHR - SEA

1 stop14h 05mAer Lingus

Deal found 15/12£417

Sun 19/114:50LHR - SEA

1 stop31h 31mWestJet

Deal found 17/12£420

Thu 13/206:50LHR - SEA

3 stops35h 10mMultiple Airlines

Deal found 15/12£421

Wed 15/115:00LHR - SEA

Nonstop9h 55mFinnair

Deal found 16/12£517

Mon 17/315:00LHR - SEA

Nonstop9h 55mIberia

Deal found 17/12£544

Mon 17/215:00LHR - SEA

Nonstop9h 55mBritish Airways

Deal found 16/12£559

Sat 15/208:25LHR - SEA

1 stop21h 42mJetBlue

Deal found 16/12£623

Sat 1/313:05LHR - SEA

Nonstop10h 00mVirgin Atlantic

Deal found 16/12£626

Sat 12/418:45LHR - SEA

2 stops34h 45mTAP AIR PORTUGAL

Deal found 16/12£699

Wed 25/1210:25LHR - SEA

1 stop16h 16mAustrian Airlines

Deal found 16/12£765

Find flights from Heathrow to Seattle within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

06:30-18:25

2 stops19h 55m

Seattle/Tacoma Intl

Tue 11/2

09:20-10:10

2 stops16h 50m

£515

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 17/2

13:15-15:15

Nonstop10h 00m

Seattle/Tacoma Intl

Sun 23/2

21:40-10:00

1 stop28h 20m

£520

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

11:10-13:20

1 stop34h 10m

Seattle/Tacoma Intl

Tue 11/2

10:35-09:20

2 stops14h 45m

£521

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

13:15-15:15

Nonstop10h 00m

Seattle/Tacoma Intl

Tue 11/2

17:45-11:10

Nonstop9h 25m

£522

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

20:05-22:53

2 stops34h 48m

Seattle/Tacoma Intl

Tue 11/2

15:25-17:50

2 stops18h 25m

£524

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

14:50-20:31

2 stops37h 41m

Seattle/Tacoma Intl

Tue 11/2

08:00-10:50

1 stop18h 50m

£525

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Tue 11/2

09:20-07:25

1 stop14h 05m

£529

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 24/4

13:05-17:50

1 stop12h 45m

Seattle/Tacoma Intl

Fri 16/5

15:45-11:55

1 stop12h 10m

£532

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

06:30-11:51

1 stop13h 21m

Seattle/Tacoma Intl

Tue 11/2

17:45-11:10

Nonstop9h 25m

£533

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 27/1

06:30-21:21

2 stops22h 51m

Seattle/Tacoma Intl

Thu 6/2

10:33-08:15

1 stop13h 42m

£540

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 27 results

Best time to book a flight from Heathrow to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Heathrow with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Heathrow to Seattle

Get recent, data-driven insights about flights from Heathrow to Seattle including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London Heathrow Airport to Seattle?

The best time to book flights from London Heathrow Airport to Seattle is 54 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of £622). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of £845). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to SEA?

It’s typically best to fly out from London Heathrow Airport to Seattle in the evening. Doing so could potentially save you 13% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from London Heathrow Airport to Seattle?

Travellers seeking maximum savings on their London Heathrow Airport to Seattle flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London Heathrow Airport to Seattle

The most flights from LHR to SEA are scheduled on a Tuesday (18 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in Seattle by month

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with Lufthansa, Icelandair and British Airways from London to Seattle by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,615 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

8,615 reviews

Delta

8.0

Very Good

8,615 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,351 reviews

Delta

8.0

Very Good

8,615 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.7

Good

1,287 reviews

Delta

8.0

Very Good

8,615 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.6

Good

1,607 reviews

Delta

8.0

Very Good

8,615 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

788 reviews

Delta

8.0

Very Good

8,615 reviews

Check prices

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to Seattle from London Heathrow?
If you book a flight to Seattle from London Heathrow, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 10 flights from London Heathrow to Seattle/Tacoma Intl per day from 12 different airlines.
What are the cheapest airlines flying from London Heathrow Airport to Seattle round-trip?
According to our current data, Air France (£520), Lufthansa (£521), and Virgin Atlantic (£522) offers the cheapest pricing from London Heathrow Airport to Seattle. Air France is priced at 14% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport to Seattle one-way?
The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as £414. However, be on the lookout for offers from Aer Lingus and WestJet, as they are both options that can get you from London Heathrow Airport to Seattle for a low price.
What are the most reliable airlines from London Heathrow Airport to Seattle?
Consider Air France (73%), Delta (73%) or Virgin Atlantic (73%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Seattle.
What are the cheapest flights from London Heathrow Airport to Seattle?
The cheapest flight price from London Heathrow Airport to Seattle is £459. On average you can expect to pay £2,151. The most popular route, (London Heathrow - Seattle/Tacoma Intl), can usually be booked for £452.
Can I find deals for flights from Heathrow to Seattle that include hotel bookings?
Yes. In addition to deals on Heathrow to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Seattle.
Can I find deals for business class flights from Heathrow to Seattle?
Yes. Cheapflights offers flight deals from Heathrow to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Seattle?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of £622). Flying from London Heathrow Airport to Seattle in July is currently the most expensive (average of £845). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Heathrow to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£313	Average£652	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Lufthansa	Cheapest£407	Average£573	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Icelandair	Cheapest£410	Average£546	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
United Airlines	Cheapest£420	Average£645	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest£436	Average£577	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Aer Lingus	Cheapest£437	Average£687	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£443	Average£630	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£465	Average£609	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Virgin Atlantic	Cheapest£465	Average£622	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air France	Cheapest£477	Average£629	FlexibilityNo cancel fee	On-time77%	Search Air France flights

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How does Cheapflights help users find flights from Heathrow to Seattle?

Deals for Heathrow to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Seattle?

Cheapflights helps you find that perfect flight to Seattle from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Seattle become cheaper?

Yes! Start tracking prices for Heathrow to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from London Heathrow Airport to Seattle from £414

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/5. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from London Heathrow to Seattle/Tacoma Intl are usually found in April or January, booked 54 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to Seattle

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to Seattle

Cheapest flights from Heathrow to SeattleExplore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2024.

Explore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2024.

Find flights from Heathrow to Seattle within your budget

Best time to book a flight from Heathrow to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Heathrow with our price prediction graph.

Travel insights for flights from Heathrow to Seattle

Get recent, data-driven insights about flights from Heathrow to Seattle including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London Heathrow Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from Heathrow to Seattle. Price data was last updated on 13 December 2024.

What is the cheapest month to book a flight from London Heathrow Airport to Seattle?

What is the cheapest time of day to fly from LHR to SEA?

Find hourly flight availability from Heathrow to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 December 2024.

What is the cheapest day to fly from London Heathrow Airport to Seattle?

Use this chart to determine the cheapest time to fly return from Heathrow to Seattle. Price data was last updated on 16 December 2024.

Weekly flight availability from London Heathrow Airport to Seattle

Explore weekly flight availability from Heathrow to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 December 2024.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

Reviews of airlines servicing Seattle

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from London Heathrow?

What are the cheapest airlines flying from London Heathrow Airport to Seattle round-trip?

What are the cheapest airlines to fly from London Heathrow Airport to Seattle one-way?

What are the most reliable airlines from London Heathrow Airport to Seattle?

What are the cheapest flights from London Heathrow Airport to Seattle?

Can I find deals for flights from Heathrow to Seattle that include hotel bookings?

How can I find direct flights from Heathrow to Seattle?

Can I find deals for business class flights from Heathrow to Seattle?

What is the cheapest month to book a flight from London Heathrow Airport to Seattle?

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Fly from Heathrow to Seattle on these airlines

Choose from the following airlines for your flight from Heathrow to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 17 December 2024.

Top 10 airlines flying from Heathrow to Seattle

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Cheapest flights from Heathrow to Seattle
Explore the most affordable flight options available from Heathrow to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2024.