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$270+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LHR
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$594
(FlightHub)

One-way from

$270
(oojo)

Popular in

June

Cheapest in

January

Average price

$688

Good round-trip deal

$716 or less

Good one-way deal

$496 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. 20% potential increase in price ($210 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($33 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 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 March 31, 2025.

This FlightHub deal was found by Cheapflights users on 3/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/214:20 pmSEA - LHR
1 stop21h 20mScandinavian Airlines
Tue 9/305:00 pmLHR - SEA
1 stop29h 00mScandinavian Airlines
Deal found 3/29$594
This Flightnetwork deal was found by Cheapflights users on 3/30. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/277:00 pmSEA - LHR
1 stop17h 20mIcelandair
Tue 5/139:25 pmLHR - SEA
1 stop28h 25mIcelandair
Deal found 3/30$611
This Trip.com deal was found by Cheapflights users on 3/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:45 pmSEA - LHR
2 stops16h 40mMultiple Airlines
Mon 10/207:05 amLHR - SEA
2 stops21h 35mMultiple Airlines
Deal found 3/31$621
This SmartFares deal was found by Cheapflights users on 3/31. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/211:55 pmPDX - LHR
1 stop13h 25mVirgin Atlantic
Tue 5/68:55 pmLHR - PDX
1 stop22h 25mVirgin Atlantic
Deal found 3/31$646
This Booking.com deal was found by Cheapflights users on 3/30. 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 4/276:00 amSEA - LHR
1 stop19h 35mAir Canada
Tue 5/138:45 amLHR - SEA
2 stops17h 48mAir Canada
Deal found 3/30$647
This Gotogate deal was found by Cheapflights users on 3/30. 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 4/217:05 pmPDX - LHR
1 stop34h 15mMultiple Airlines
Tue 5/66:30 amLHR - PDX
2 stops20h 15mMultiple Airlines
Deal found 3/30$652
This lol.travel deal was found by Cheapflights users on 3/31. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/285:35 pmSEA - LHR
Nonstop9h 45mVirgin Atlantic
Tue 5/136:15 amLHR - SEA
1 stop13h 00mVirgin Atlantic
Deal found 3/31$653
This oojo deal was found by Cheapflights users on 3/30. 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.
Wed 10/223:20 pmPDX - LHR
1 stop12h 35mIcelandair
Fri 10/3112:15 pmLHR - PDX
1 stop12h 45mIcelandair
Deal found 3/30$655
This Finnair deal was found by Cheapflights users on 3/31. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/291:30 pmSEA - LHR
Nonstop9h 20mFinnair
Wed 5/710:20 amLHR - SEA
1 stop13h 40mFinnair
Deal found 3/31$658
This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/46:45 pmSEA - LHR
1 stop12h 10mAer Lingus
Wed 5/2112:00 pmLHR - SEA
1 stop12h 59mAer Lingus
Deal found 3/30$662
This Gotogate deal was found by Cheapflights users on 3/30. 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 4/2110:10 amPDX - LHR
2 stops17h 40mLufthansa
Tue 5/66:30 amLHR - PDX
2 stops20h 15mLufthansa
Deal found 3/30$663
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Wed 4/308:20 pmSEA - LHR
Nonstop9h 20mAmerican Airlines
Wed 5/710:20 amLHR - SEA
1 stop13h 40mAmerican Airlines
Deal found 3/30$668

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 March 31, 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 9/21

4:20 pm-9:40 pm

1 stop21h 20m

London Heathrow

Tue 9/30

5:00 pm-2:00 pm

1 stop29h 00m

$594

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 4/27

7:00 pm-8:20 pm

1 stop17h 20m

London Heathrow

Tue 5/13

9:25 pm-5:50 pm

1 stop28h 25m

$611

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/21

1:55 pm-11:20 am

1 stop13h 25m

London Heathrow

Tue 5/6

8:55 pm-11:20 am

1 stop22h 25m

$646

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 4/27

6:00 am-9:35 am

1 stop19h 35m

London Heathrow

Tue 5/13

8:45 am-6:33 pm

2 stops17h 48m

$647

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/21

7:05 pm-1:20 pm

1 stop34h 15m

London Heathrow

Tue 5/6

6:30 am-6:45 pm

2 stops20h 15m

$652

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 4/28

5:35 pm-11:20 am

Nonstop9h 45m

London Heathrow

Tue 5/13

6:15 am-11:15 am

1 stop13h 00m

$653

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 4/29

1:30 pm-6:50 am

Nonstop9h 20m

London Heathrow

Wed 5/7

9:30 am-4:00 pm

1 stop14h 30m

$658

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 9/22

3:20 pm-11:55 am

1 stop12h 35m

London Heathrow

Fri 10/3

1:05 pm-5:55 pm

1 stop12h 50m

$661

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 5/4

6:45 pm-2:55 pm

1 stop12h 10m

London Heathrow

Wed 5/21

12:00 pm-4:59 pm

1 stop12h 59m

$662

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/21

10:10 am-11:50 am

2 stops17h 40m

London Heathrow

Tue 5/6

6:30 am-6:45 pm

2 stops20h 15m

$663

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

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 March 31, 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 March 31, 2025.

The most flights from USWA to LHR are scheduled on a Sunday (21 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 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 March 31, 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
7,899 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
9,811 reviews
Delta
8.0
Very good
7,899 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

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.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
1,570 reviews
Delta
8.0
Very good
7,899 reviews

Overall

8.0

Comfort

8.0

Crew

8.5

Boarding

8.2

Entertainment

7.9

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?

    $270 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on WestJet and Scandinavian Airlines, with prices starting from $388 and $414, 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 (80%), Singapore Airlines (80%) or American Airlines (73%) 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 $2,798 for a flight from State of Washington to London Heathrow Airport. The cheapest flight overall is $412 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at $603.

  • 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
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
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Dover
Gatwick
Orpington
Watford
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Northampton
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Croydon
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Ilford
Broadway

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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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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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$378Average$768FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$498Average$890FlexibilityNo cancel feeOn-time69%
IcelandairCheapest$508Average$682FlexibilityNo cancel feeOn-time76%
IberiaCheapest$582Average$731FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$583Average$793FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$597Average$785FlexibilityNo cancel feeOn-time76%
KLMCheapest$597Average$816FlexibilityNo cancel feeOn-time75%
DeltaCheapest$614Average$883FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$615Average$931FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$621Average$1,026FlexibilityNo cancel feeOn-time70%
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