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$269+ Cheap flights from Washington to Heathrow (LHR)

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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Washington to Heathrow

Keep the following information in mind while searching for Washington to Heathrow flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$585
(Gotogate)

One-way from

$269
(FlightHub)

Popular in

June

Cheapest in

January

Average price

$709

Good round-trip deal

$695 or less

Good one-way deal

$488 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.
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From Washington to London Heathrow
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One-way flight from Washington to London Heathrow
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Highest demand for flights based on searches. 22% potential increase in price ($232 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Washington to London Heathrow.
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Price to beat on a one-way flight from Washington to London Heathrow.
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Find flight deals from Washington to Heathrow

Cheapest flights from Washington to Heathrow
Explore the most affordable flight options available from Washington to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:45 pmSEA - LHR
1 stop12h 10mAer Lingus
Thu 4/107:40 amLHR - SEA
1 stop17h 19mAer Lingus
Deal found 2/20$585
This oojo deal was found by Cheapflights users on 2/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/12:35 pmSEA - LHR
1 stop12h 15mIcelandair
Wed 3/512:15 pmLHR - SEA
1 stop12h 45mIcelandair
Deal found 2/20$586
This Booking.com deal was found by Cheapflights users on 2/19. 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.
Wed 4/168:20 pmSEA - LHR
Nonstop9h 20mIberia
Wed 4/309:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 2/19$597
This Cheapflightsfares deal was found by Cheapflights users on 2/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/46:30 pmPDX - LHR
Nonstop9h 40mIberia
Tue 3/188:20 amLHR - PDX
1 stop21h 40mIberia
Deal found 2/18$609
This World Air Fares deal was found by Cheapflights users on 2/20. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/148:25 pmSEA - LHR
Nonstop9h 45mKLM
Mon 3/246:30 amLHR - SEA
1 stop13h 10mKLM
Deal found 2/20$609
This Booking.com deal was found by Cheapflights users on 2/20. 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.
Wed 10/84:20 pmSEA - LHR
2 stops18h 30mScandinavian Airlines
Wed 10/157:05 amLHR - SEA
2 stops14h 55mScandinavian Airlines
Deal found 2/20$611
This Booking.com deal was found by Cheapflights users on 2/20. 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.
Sun 3/96:45 pmSEA - LHR
Nonstop9h 25mVirgin Atlantic
Tue 3/251:15 pmLHR - SEA
Nonstop10h 00mVirgin Atlantic
Deal found 2/20$613
This Air Canada deal was found by Cheapflights users on 2/20. 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 4/2910:25 amSEA - LHR
1 stop18h 55mAir Canada
Wed 5/78:40 amLHR - SEA
2 stops18h 57mAir Canada
Deal found 2/20$616
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/97:30 pmPDX - LHR
Nonstop9h 40mBritish Airways
Tue 3/182:20 pmLHR - PDX
Nonstop10h 15mBritish Airways
Deal found 2/19$619
This Air Canada deal was found by Cheapflights users on 2/20. 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 4/223:05 pmSEA - LHR
1 stop14h 15mMultiple Airlines
Tue 5/610:50 amLHR - SEA
2 stops19h 23mMultiple Airlines
Deal found 2/20$619
This Gotogate deal was found by Cheapflights users on 2/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/3010:10 amPDX - LHR
2 stops17h 40mMultiple Airlines
Thu 5/86:00 amLHR - PDX
2 stops20h 45mMultiple Airlines
Deal found 2/19$620
This World Air Fares deal was found by Cheapflights users on 2/20. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/203:10 pmPDX - LHR
1 stop15h 05mKLM
Wed 4/306:30 amLHR - PDX
1 stop12h 50mKLM
Deal found 2/20$621

Find flights from Washington to Heathrow within your budget

Customize your flight search to find flights from Washington to Heathrow 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 February 20, 2025.

Fly from

Washington

Fly to

Heathrow

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/1

6:45 pm-2:55 pm

1 stop12h 10m

London Heathrow

Thu 4/10

7:40 am-4:59 pm

1 stop17h 19m

$585

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/23

3:45 pm-8:20 pm

1 stop20h 35m

London Heathrow

Wed 4/30

1:05 pm-8:40 pm

1 stop15h 35m

$589

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 4/16

8:20 pm-1:40 pm

Nonstop9h 20m

London Heathrow

Wed 4/30

9:50 am-11:35 am

Nonstop9h 45m

$597

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 3/14

8:25 pm-1:10 pm

Nonstop9h 45m

London Heathrow

Mon 3/24

6:30 am-12:40 pm

1 stop13h 10m

$609

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/4

6:30 pm-12:10 pm

Nonstop9h 40m

London Heathrow

Tue 3/18

8:20 am-11:00 pm

1 stop21h 40m

$609

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 3/9

6:45 pm-11:10 am

Nonstop9h 25m

London Heathrow

Tue 3/25

1:15 pm-4:15 pm

Nonstop10h 00m

$613

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/29

10:25 am-1:20 pm

1 stop18h 55m

London Heathrow

Wed 5/7

8:40 am-7:37 pm

2 stops18h 57m

$616

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 3/9

7:30 pm-12:10 pm

Nonstop9h 40m

London Heathrow

Tue 3/18

2:20 pm-5:35 pm

Nonstop10h 15m

$619

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/22

3:05 pm-1:20 pm

1 stop14h 15m

London Heathrow

Tue 5/6

10:50 am-10:13 pm

2 stops19h 23m

$619

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/30

10:10 am-11:50 am

2 stops17h 40m

London Heathrow

Thu 5/8

6:00 am-6:45 pm

2 stops20h 45m

$620

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 60 results
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Best time to book a flight from Washington to Heathrow

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

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

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

Currently, November is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of $661). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of $1,136). 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 WA to LHR?

Find hourly flight availability from Washington to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

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

Weekly flight availability from State of Washington to London Heathrow Airport

Explore weekly flight availability from Washington to Heathrow. 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 February 20, 2025.

The most flights from USWA to LHR are scheduled on a Wednesday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated February 20, 2025.
Read through reviews of airlines operating flights from Washington to London, such as Delta, Alaska Airlines and KLM. 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
8,219 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Alaska Airlines
8.0
Very good
9,697 reviews
Delta
8.0
Very good
8,219 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,274 reviews
Delta
8.0
Very good
8,219 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,219 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Washington to Heathrow. 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 State of Washington to London Heathrow Airport one-way?

    $269 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Icelandair and British Airways, with prices starting from $278 and $412, respectively.

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

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

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

    No one likes to see their flight delayed. When booking a flight from State of Washington to London Heathrow Airport consider choosing Aeromexico (82%), Singapore Airlines (81%) or American Airlines (72%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $1,685 for a flight from State of Washington to London Heathrow Airport. The cheapest flight overall is $404 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $541.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from State of Washington to London Heathrow Airport (average of $661). Flying from State of Washington to London Heathrow Airport in June is currently the most expensive (average of $1,136). 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

Traveling to a place near Washington?

Book flights to Washington if you plan to visit one of these locations
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Alternative routes for Washington to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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San Francisco to Gatwick flights
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Raleigh to Heathrow flights

Top 10 airlines flying from Washington to Heathrow

Discover the top 10 airlines that operate flights from Washington to Heathrow. 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$503Average$684FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$519Average$719FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$572Average$951FlexibilityNo cancel feeOn-time71%
IberiaCheapest$583Average$752FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$583Average$861FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$586Average$762FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$588Average$895FlexibilityNo cancel feeOn-time77%
KLMCheapest$596Average$830FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$610Average$894FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$611Average$905FlexibilityNo cancel feeOn-time69%
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