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$490+ Cheap flights from Heathrow (LHR) to Washington

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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
Apr 1 — Apr 81
Tue 4/1
Tue 4/8
1 adult, Economy
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Cheap flight deals from Heathrow to Washington

Keep the following information in mind while searching for Heathrow to Washington flight deals. Data was last updated March 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$594
(SmartFares)

One-way from

$490
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$679

Good round-trip deal

$693 or less

Good one-way deal

$759 or less
Provider with most accurate pricing for London (LON)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Seattle/Tacoma Intl flights.
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From London Heathrow to Washington
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One-way flight from London Heathrow to Washington
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Highest demand for flights based on searches. 15% potential increase in price ($144 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from London Heathrow to Washington.
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Price to beat on a one-way flight from London Heathrow to Washington.
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Find flight deals from Heathrow to Washington

Cheapest flights from Heathrow to Washington
Explore the most affordable flight options available from Heathrow to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 27, 2025.

This Air Canada deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/68:45 amLHR - SEA
2 stops18h 52mAir Canada
Wed 5/1410:00 amSEA - LHR
2 stops16h 00mAir Canada
Deal found 3/26$598
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2011:25 amLHR - SEA
2 stops34h 35mUnited Airlines
Wed 7/211:11 amSEA - LHR
1 stop17h 09mUnited Airlines
Deal found 3/25$599
This The Travel House deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/219:25 pmLHR - SEA
1 stop28h 25mIcelandair
Sat 4/263:45 pmSEA - LHR
1 stop20h 35mIcelandair
Deal found 3/26$600
This Lufthansa deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/256:30 amLHR - SEA
1 stop13h 55mLufthansa
Fri 5/212:55 pmSEA - LHR
1 stop13h 45mLufthansa
Deal found 3/26$603
This SWISS deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:00 amLHR - SEA
2 stops24h 43mSWISS
Wed 5/72:40 pmSEA - LHR
2 stops20h 40mSWISS
Deal found 3/26$606
This TravelUp deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/56:30 amLHR - SEA
1 stop17h 27mKLM
Wed 5/148:20 pmSEA - LHR
Nonstop9h 55mKLM
Deal found 3/25$608
This Billigflug deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/219:50 amLHR - SEA
Nonstop9h 45mMultiple Airlines
Mon 5/55:40 pmSEA - LHR
1 stop13h 30mMultiple Airlines
Deal found 3/26$609
This TravelTrolley deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelTrolley is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/231:25 pmLHR - SEA
Nonstop10h 20mVirgin Atlantic
Wed 4/305:35 pmSEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 3/26$617
This Booking.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/216:20 amLHR - SEA
1 stop18h 39mBritish Airways
Mon 5/51:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Deal found 3/26$625
This American Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/214:30 pmLHR - SEA
Nonstop9h 50mAmerican Airlines
Mon 5/55:40 pmSEA - LHR
1 stop13h 30mAmerican Airlines
Deal found 3/26$628
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/216:30 amLHR - SEA
1 stop13h 15mDelta
Mon 5/55:35 pmSEA - LHR
Nonstop9h 45mDelta
Deal found 3/27$636
This Austrian Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2312:15 pmLHR - SEA
1 stop16h 27mAustrian Airlines
Tue 9/168:00 amSEA - LHR
1 stop14h 55mAustrian Airlines
Deal found 3/27$685

Cheapflights Fare Finder

Customize your flight search to find flights from Heathrow to Washington 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 2,558,603 searches. Data last updated March 27, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Washington that are best for you.

Fly from

Heathrow

Fly to

Washington

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/6

9:25 am-11:10 am

Nonstop9h 45m

Seattle/Tacoma Intl

Wed 5/21

5:40 pm-3:10 pm

1 stop13h 30m

$598

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 5/20

11:25 am-2:00 pm

2 stops34h 35m

Seattle/Tacoma Intl

Wed 7/2

11:11 am-12:20 pm

1 stop17h 09m

$599

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/21

9:25 pm-8:40 pm

1 stop31h 15m

Seattle/Tacoma Intl

Fri 4/25

3:45 pm-8:20 pm

1 stop20h 35m

$600

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/30

6:00 am-10:43 pm

2 stops24h 43m

Seattle/Tacoma Intl

Wed 5/7

2:40 pm-7:20 pm

2 stops20h 40m

$606

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 5/5

6:30 am-3:57 pm

1 stop17h 27m

Seattle/Tacoma Intl

Wed 5/14

8:20 pm-2:15 pm

Nonstop9h 55m

$608

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/21

9:50 am-11:35 am

Nonstop9h 45m

Seattle/Tacoma Intl

Mon 5/5

5:40 pm-3:10 pm

1 stop13h 30m

$609

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 4/26

12:05 pm-9:41 pm

1 stop17h 36m

Seattle/Tacoma Intl

Sat 5/3

7:20 am-10:00 am

1 stop18h 40m

$613

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Sat 9/13

6:30 am-10:28 pm

2 stops23h 58m

Seattle/Tacoma Intl

Wed 9/24

10:00 am-10:00 am

2 stops16h 00m

$614

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 4/23

1:25 pm-3:45 pm

Nonstop10h 20m

Seattle/Tacoma Intl

Wed 4/30

5:35 pm-11:20 am

Nonstop9h 45m

$617

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 4/21

6:20 am-4:59 pm

1 stop18h 39m

Seattle/Tacoma Intl

Mon 5/5

1:30 pm-6:50 am

Nonstop9h 20m

$625

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 53 results
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Best time to book a flight from Heathrow to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Washington

What is the cheapest month to book a flight from London Heathrow Airport to State of Washington?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of $238). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of $411). 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 WA?

Find hourly flight availability from Heathrow to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 27, 2025.

When flying from London Heathrow Airport to State of Washington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated March 27, 2025.
See what other customers who have flown with Delta, KLM and Finnair from London to Washington have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,895 reviews

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,895 reviews
Delta
8.0
Very good
7,895 reviews

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,319 reviews
Delta
8.0
Very good
7,895 reviews

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,895 reviews

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very good
7,895 reviews

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,570 reviews
Delta
8.0
Very good
7,895 reviews

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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 Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    The cheapest airlines for a one-way flight from London Heathrow Airport to State of Washington are WestJet ($521), Aer Lingus ($529), and Icelandair ($541).

  • What are the most popular routes from London Heathrow Airport to State of Washington?

    While some choose either London Heathrow - Portland or London Heathrow - Spokane, London Heathrow - Seattle/Tacoma Intl is the most popular route from London Heathrow Airport to State of Washington.

  • What are the most reliable airlines from London Heathrow Airport to State of Washington?

    Consider Aeromexico (98%), Singapore Airlines (98%) or KLM (92%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to State of Washington.

  • What are the cheapest flights from London Heathrow Airport to State of Washington?

    Looking at all options, your cheapest flight can be booked for $633. While the most popular route (London Heathrow - Seattle/Tacoma Intl) can be booked for $519 on average our data indicates $1,594 when flying from London Heathrow Airport to State of Washington.

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

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

  • How can I find direct flights from Heathrow to Washington?

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Washington 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 State of Washington?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of $238). Flying from London Heathrow Airport to State of Washington in July is currently the most expensive (average of $411). 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

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Alternative routes for Heathrow to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Heathrow to Nashville flights

Top 7 airlines flying from Heathrow to Washington

Discover the top 7 airlines that operate flights from Heathrow to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$449Average$762FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$560Average$834FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$621Average$811FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$635Average$952FlexibilityNo cancel feeOn-time72%
IberiaCheapest$673Average$975FlexibilityNo cancel feeOn-time77%
KLMCheapest$674Average$844FlexibilityNo cancel feeOn-time75%
DeltaCheapest$681Average$962FlexibilityNo cancel feeOn-timeN/A
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