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Cheap flights from London Heathrow Airport to Seattle from C$ 524

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
19 Nov — 26 Nov1
1 adult

The best prices from London Heathrow to Seattle/Tacoma Intl are usually found in January or April, booked 48 days in advance, depart on a Wednesday or Monday and return on a Monday

Cheap flight deals from Heathrow to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 November 2024.

Round-trip from

C$ 840

One-way from

C$ 524

Popular in

July

Cheapest in

January
Icelandair
  • Icelandair
  • 14/1-23/1
  • 2 total stops
  • 25h 00m total
  • London to Seattle
Search Deals
WestJet
  • WestJet
  • 6/2
  • 1 total stop
  • 31h 31m total
  • London to Seattle
Search Deals
High demand for flights, 23% potential price rise
Search Deals
Best time to find cheap flights, 12% potential price drop
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 14 November 2024.

Thu 5/128:40 p.m.LHR - SEA
1 stop28h 20mIcelandair
Mon 9/122:35 p.m.SEA - LHR
1 stop20h 55mIcelandair
Deal found 14/11C$ 901
Wed 4/126:30 a.m.LHR - SEA
1 stop13h 40mUnited Airlines
Wed 11/1210:55 a.m.SEA - LHR
2 stops16h 10mUnited Airlines
Deal found 13/11C$ 972
Wed 4/126:20 a.m.LHR - SEA
1 stop13h 49mDelta
Wed 12/36:45 p.m.SEA - LHR
Nonstop9h 25mDelta
Deal found 14/11C$ 979
Thu 5/1212:40 p.m.LHR - SEA
Nonstop10h 00mVirgin Atlantic
Thu 12/125:45 p.m.SEA - LHR
Nonstop9h 25mVirgin Atlantic
Deal found 14/11C$ 1,063
Tue 24/129:25 a.m.LHR - SEA
Nonstop9h 55mBritish Airways
Tue 31/122:13 p.m.SEA - LHR
1 stop13h 52mBritish Airways
Deal found 14/11C$ 1,108
Wed 27/116:30 a.m.LHR - SEA
1 stop13h 40mLufthansa
Wed 4/1210:55 a.m.SEA - LHR
1 stop13h 00mLufthansa
Deal found 14/11C$ 1,213
Mon 25/119:05 a.m.LHR - SEA
2 stops43h 15mAustrian Airlines
Wed 11/127:00 a.m.SEA - LHR
2 stops42h 40mAustrian Airlines
Deal found 14/11C$ 1,218
Wed 27/116:40 a.m.LHR - SEA
2 stops25h 45mScandinavian Airlines
Wed 4/1211:50 a.m.SEA - LHR
2 stops21h 50mScandinavian Airlines
Deal found 14/11C$ 1,228
Wed 27/116:30 a.m.LHR - SEA
1 stop13h 10mKLM
Wed 4/126:55 p.m.SEA - LHR
Nonstop9h 45mKLM
Deal found 14/11C$ 1,231
Tue 26/119:25 a.m.LHR - SEA
Nonstop9h 55mFinnair
Tue 3/121:35 p.m.SEA - LHR
Nonstop9h 25mFinnair
Deal found 13/11C$ 1,263
Fri 15/117:40 a.m.LHR - SEA
1 stop13h 40mMultiple Airlines
Sun 17/1110:55 a.m.SEA - LHR
1 stop13h 00mMultiple Airlines
Deal found 14/11C$ 1,527
Sat 14/129:10 a.m.LHR - SEA
1 stop15h 15mAir France
Thu 2/15:45 p.m.SEA - LHR
Nonstop9h 25mAir France
Deal found 14/11C$ 1,602

Find flights from Heathrow to Seattle within your budget

Customize your flight search to find flights from Heathrow to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 625,151 searches. Data last updated 14 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 5/12

8:40 p.m.-5:00 p.m.

1 stop28h 20m

Seattle/Tacoma Intl

Mon 9/12

2:35 p.m.-7:30 p.m.

1 stop20h 55m

C$ 901

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 18/2

6:30 a.m.-11:45 a.m.

1 stop13h 15m

Seattle/Tacoma Intl

Mon 24/2

5:45 p.m.-11:10 a.m.

Nonstop9h 25m

C$ 946

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 17/2

1:00 p.m.-6:25 p.m.

1 stop13h 25m

Seattle/Tacoma Intl

Mon 24/2

10:35 a.m.-10:10 a.m.

1 stop15h 35m

C$ 951

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 7/5

10:20 a.m.-4:00 p.m.

1 stop13h 40m

Seattle/Tacoma Intl

Thu 15/5

5:40 p.m.-3:10 p.m.

1 stop13h 30m

C$ 953

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 17/2

6:30 a.m.-12:10 p.m.

1 stop13h 40m

Seattle/Tacoma Intl

Tue 25/2

10:52 a.m.-7:55 a.m.

1 stop13h 03m

C$ 960

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 18/2

6:30 a.m.-11:45 a.m.

1 stop13h 15m

Seattle/Tacoma Intl

Wed 26/2

7:05 p.m.-12:40 p.m.

Nonstop9h 35m

C$ 962

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 18/2

9:25 a.m.-11:20 a.m.

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 24/2

6:50 p.m.-12:15 p.m.

Nonstop9h 25m

C$ 969

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 6/1

8:50 a.m.-10:23 p.m.

1 stop21h 33m

Seattle/Tacoma Intl

Mon 13/1

7:30 a.m.-7:55 a.m.

1 stop16h 25m

C$ 1,004

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Thu 9/1

1:35 p.m.-8:31 p.m.

2 stops38h 56m

Seattle/Tacoma Intl

Mon 13/1

7:00 a.m.-9:40 a.m.

2 stops42h 40m

C$ 1,028

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 17/2

7:30 p.m.-10:15 p.m.

2 stops34h 45m

Seattle/Tacoma Intl

Thu 27/2

7:20 a.m.-9:20 a.m.

2 stops18h 00m

C$ 1,173

Flights are sorted by cheapest first

Deals found on 14/11

Showing 1-10 of 26 results
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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 round-trip 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?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Seattle. Price data was last updated on 8 November 2024.

The price you pay for your flight from London Heathrow Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 48 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of C$ 271). Flying from London Heathrow Airport to Seattle in March is currently the most expensive (average of C$ 418). 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?

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 14 November 2024.

When flying from London Heathrow Airport to Seattle, 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 28% versus a flight at noon.

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 14 November 2024.

The most flights from LHR to SEA are scheduled on a Wednesday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm 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

Plan your trip to Seattle by taking into account the average temperature totals 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 insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 14 November 2024.
See what other customers who have flown with Icelandair, Austrian Airlines and Lufthansa from London to Seattle have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,788 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

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
8,788 reviews
Delta
8.0
Very good
8,788 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

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
1,346 reviews
Delta
8.0
Very good
8,788 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

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
1,304 reviews
Delta
8.0
Very good
8,788 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

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
810 reviews
Delta
8.0
Very good
8,788 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

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
1,640 reviews
Delta
8.0
Very good
8,788 reviews
Check prices

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.9

Food

7.3

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

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?

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly into when you book flights from London Heathrow to Seattle. 0 airlines have flights to Seattle/Tacoma Intl from London Heathrow on a regular basis. Booking flights from London Heathrow to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 12 inbound flights from London Heathrow per day.

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

    Currently priced at C$ 840, Icelandair will fly you from London Heathrow Airport to Seattle and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Delta - these airlines can fly you to your destination from C$ 907 and C$ 946, respectively. These flights start at 20% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from London Heathrow Airport to Seattle are WestJet (C$ 524), Aer Lingus (C$ 735), and Icelandair (C$ 918).

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

    Consider Air France (69%), Delta (69%) or Virgin Atlantic (69%) 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?

    Looking for the cheapest flight from London Heathrow Airport to Seattle? While on average our users pay C$ 1,619, our data indicates the cheapest price to be C$ 1,192. The most popular route (London Heathrow - Seattle/Tacoma Intl), is priced around C$ 1,115.

  • 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 vacation 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to Seattle (average of C$ 271). Flying from London Heathrow Airport to Seattle in March is currently the most expensive (average of C$ 418). 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.

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

Yes, we can. To see specific flights from Heathrow to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Heathrow today and book when prices fit your budget.

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