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$285+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$624
(oojo)

One-way from

$285
(oojo)

Popular in

June

Cheapest in

October

Average price

$684

Good round-trip deal

$738 or less

Good one-way deal

$492 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. 18% potential increase in price ($178 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This oojo deal was found by Cheapflights users on 4/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:30 pmSEA - LHR
1 stop12h 50mIcelandair
Sun 9/79:25 pmLHR - SEA
1 stop22h 00mIcelandair
Deal found 4/27$624
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 10/11:30 pmSEA - LHR
1 stop12h 20mDelta
Wed 10/155:25 pmLHR - SEA
Nonstop10h 25mDelta
Deal found 4/29$628
This Scandinavian Airlines deal was found by Cheapflights users on 4/28. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/244:20 pmSEA - LHR
1 stop33h 00mScandinavian Airlines
Wed 10/156:40 amLHR - SEA
1 stop15h 20mScandinavian Airlines
Deal found 4/28$629
This oojo deal was found by Cheapflights users on 4/28. 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.
Fri 9/193:20 pmPDX - LHR
1 stop12h 35mIcelandair
Fri 9/261:05 pmLHR - PDX
1 stop12h 50mIcelandair
Deal found 4/28$632
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:25 pmPDX - LHR
Nonstop9h 35mIberia
Mon 10/277:05 pmLHR - PDX
2 stops22h 26mIberia
Deal found 4/29$654
This Gotogate deal was found by Cheapflights users on 4/28. 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.
Mon 10/136:15 amPDX - LHR
2 stops19h 20mMultiple Airlines
Wed 10/228:40 amLHR - PDX
2 stops18h 06mMultiple Airlines
Deal found 4/28$656
This World Air Fares deal was found by Cheapflights users on 4/29. 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 11/92:07 pmSEA - LHR
1 stop13h 08mMultiple Airlines
Wed 11/198:55 amLHR - SEA
2 stops21h 34mMultiple Airlines
Deal found 4/29$660
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/201:58 pmSEA - LHR
1 stop14h 32mIberia
Fri 9/59:50 amLHR - SEA
Nonstop9h 45mIberia
Deal found 4/29$669
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
Mon 9/227:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Fri 10/33:40 pmLHR - PDX
Nonstop9h 55mBritish Airways
Deal found 4/28$675
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
Wed 10/11:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 10/144:30 pmLHR - SEA
Nonstop9h 50mBritish Airways
Deal found 4/29$675
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Wed 9/37:20 amSEA - LHR
1 stop15h 10mUnited Airlines
Wed 9/176:30 amLHR - SEA
2 stops20h 06mUnited Airlines
Deal found 4/28$677
This Delta deal was found by Cheapflights users on 4/29. 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.
Sat 7/261:25 pmPDX - LHR
1 stop22h 35mDelta
Sun 8/246:15 amLHR - PDX
2 stops16h 22mDelta
Deal found 4/29$680

Cheapflights Fare Finder

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 April 30, 2025.
Use the filters below to find and compare flights from Washington to London Heathrow Airport that are best for you.

Fly from

Washington

Fly to

Heathrow

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 7/27

3:45 pm-11:55 am

1 stop12h 10m

London Heathrow

Thu 8/28

9:25 pm-11:25 am

1 stop22h 00m

$624

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 5/21

4:00 pm-9:40 pm

1 stop21h 40m

London Heathrow

Mon 5/26

6:40 am-1:50 pm

1 stop15h 10m

$629

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 5/7

3:20 pm-8:20 pm

1 stop21h 00m

London Heathrow

Mon 5/12

9:25 pm-5:55 pm

1 stop28h 30m

$670

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 7/26

1:25 pm-8:00 pm

1 stop22h 35m

London Heathrow

Sun 8/24

6:15 am-2:37 pm

2 stops16h 22m

$680

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 5/12

3:45 pm-11:55 am

1 stop12h 10m

London Heathrow

Tue 5/20

3:05 pm-10:47 pm

2 stops39h 42m

$688

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 7/27

5:35 am-6:30 am

2 stops16h 55m

London Heathrow

Thu 8/28

9:30 am-6:36 pm

2 stops17h 06m

$703

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 7/26

9:45 pm-8:00 pm

1 stop14h 15m

London Heathrow

Thu 8/28

1:25 pm-3:45 pm

Nonstop10h 20m

$707

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 5/11

3:20 pm-11:55 am

1 stop12h 35m

London Heathrow

Thu 5/15

3:05 pm-9:28 am

2 stops50h 23m

$723

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 7/6

12:20 am-6:20 am

1 stop22h 00m

London Heathrow

Thu 9/18

6:30 am-11:55 am

1 stop13h 25m

$734

PascoLondon

PSC - LHR

PSCLHR

Pasco Tri Cities

Fri 9/5

5:45 pm-2:15 pm

1 stop12h 30m

London Heathrow

Wed 9/17

11:30 am-10:51 pm

2 stops19h 21m

$749

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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.

Cheapflights Insights

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

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 $1,110). 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 April 30, 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 April 30, 2025.

The most flights from USWA to LHR are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 April 30, 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
7,929 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

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
9,961 reviews
Delta
8.0
Very good
7,929 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

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
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

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.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,929 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

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.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

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?

    $285 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Delta and Scandinavian Airlines, with prices starting from $378 and $394, 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 Scandinavian Airlines (90%), KLM (85%) or Aeromexico (85%) 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 $2,417 for a flight from State of Washington to London Heathrow Airport. The cheapest flight overall is $409 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $473.

  • 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 $1,110). 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
Hayes
Hounslow
Thornton Heath
Luton
Horley
Canterbury
Harrow
Wembley
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Borehamwood
Folkestone
Ilford
Broadway
Aylesbury

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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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Dallas/Fort Worth to Gatwick 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$378Average$768FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$504Average$673FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$550Average$880FlexibilityNo cancel feeOn-time69%
IberiaCheapest$579Average$732FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$583Average$819FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$584Average$789FlexibilityNo cancel feeOn-time77%
FinnairCheapest$597Average$781FlexibilityNo cancel feeOn-time76%
KLMCheapest$598Average$821FlexibilityNo cancel feeOn-time75%
DeltaCheapest$614Average$883FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$615Average$870FlexibilityNo cancel feeOn-time77%

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