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Cheap flights from Washington to London from £213

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
5 May — 12 May1
1 adult

Cheap flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 30 April 2025.

Round-trip from

£467

One-way from

£213

Popular in

June

Cheapest in

October

Average price

£510

Good round-trip deal

£495 or less

Good one-way deal

£376 or less
Icelandair
  • Icelandair
  • 26/7-28/8
  • 2 total stops
  • 50h 25m total
  • Washington to London
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Icelandair
  • Icelandair
  • 11/5
  • 1 total stop
  • 32h 45m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£98 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Washington to London (LON).
Search Deals
Price to beat on a one-way flight from Washington to London (LON).
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Find flight deals from Washington to London

Cheapest flights from Washington to London
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Sat 26/723:30SEA - LHR
1 stop28h 25mIcelandair
Thu 28/821:25LHR - SEA
1 stop22h 00mIcelandair
Deal found 28/4£467
Sat 23/819:00SEA - LGW
1 stop11h 40mIcelandair
Sat 30/815:40LGW - SEA
1 stop13h 00mIcelandair
Deal found 28/4£468
Sat 23/823:35SEA - LHR
1 stop23h 10mDelta
Thu 11/917:25LHR - SEA
Nonstop10h 25mDelta
Deal found 29/4£468
Wed 21/516:00SEA - LHR
1 stop21h 40mScandinavian Airlines
Mon 26/506:40LHR - SEA
1 stop15h 10mScandinavian Airlines
Deal found 29/4£469
Wed 27/816:00SEA - STN
2 stops22h 30mMultiple Airlines
Tue 2/914:45STN - SEA
2 stops31h 05mMultiple Airlines
Deal found 29/4£479
Mon 25/820:20SEA - LHR
Nonstop9h 20mIberia
Mon 8/909:50LHR - SEA
Nonstop9h 45mIberia
Deal found 29/4£482
Sun 30/1118:30PDX - LHR
Nonstop9h 40mBritish Airways
Wed 10/1214:20LHR - PDX
Nonstop10h 15mBritish Airways
Deal found 30/4£486
Mon 13/1015:25PDX - LHR
1 stop13h 55mMultiple Airlines
Wed 22/1008:40LHR - PDX
2 stops18h 06mMultiple Airlines
Deal found 28/4£488
Sun 10/810:23PDX - LHR
1 stop12h 57mAmerican Airlines
Fri 29/815:40LHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 29/4£494
Tue 28/1015:45PDX - LGW
1 stop12h 10mIcelandair
Wed 5/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 29/4£495
Sun 10/819:25PDX - LHR
Nonstop9h 35mIberia
Fri 29/815:40LHR - PDX
Nonstop9h 55mIberia
Deal found 29/4£496
Wed 8/1007:00PDX - LHR
2 stops17h 35mUnited Airlines
Wed 29/1007:30LHR - PDX
2 stops17h 08mUnited Airlines
Deal found 30/4£497

Cheapflights Fare Finder

Customise your flight search to find flights from Washington to London 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 858,174 searches. Data last updated 30 April 2025.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Washington

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 26/7

23:30-11:55

1 stop28h 25m

London Heathrow

Thu 28/8

21:25-11:25

1 stop22h 00m

£467

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 23/8

23:35-06:45

1 stop23h 10m

London Heathrow

Thu 11/9

17:25-19:50

Nonstop10h 25m

£468

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 23/8

19:00-14:40

1 stop11h 40m

London Gatwick

Sat 30/8

15:40-20:40

1 stop13h 00m

£468

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 21/5

16:00-21:40

1 stop21h 40m

London Heathrow

Mon 26/5

06:40-13:50

1 stop15h 10m

£469

SeattleLondon

SEA - STN

SEASTN

Seattle/Tacoma Intl

Wed 27/8

16:00-22:30

2 stops22h 30m

London Stansted

Tue 2/9

14:45-13:50

2 stops31h 05m

£479

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 25/8

20:20-13:40

Nonstop9h 20m

London Heathrow

Mon 8/9

09:50-11:35

Nonstop9h 45m

£482

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 13/10

15:25-13:20

1 stop13h 55m

London Heathrow

Wed 22/10

08:40-18:46

2 stops18h 06m

£488

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 17/8

19:25-13:00

Nonstop9h 35m

London Heathrow

Sun 31/8

15:10-23:07

1 stop15h 57m

£489

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/8

10:23-07:20

1 stop12h 57m

London Heathrow

Fri 29/8

15:40-17:35

Nonstop9h 55m

£494

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/8

19:25-13:00

Nonstop9h 35m

London Heathrow

Fri 29/8

15:40-17:35

Nonstop9h 55m

£496

Flights are sorted by cheapest return flights first.

Deals found on 30/4

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

Have a flexible travel schedule? Discover the best time to fly to London from Washington with our price prediction graph.
Estimated return 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

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to London (average of £112). Flying from State of Washington to London in August is currently the most expensive (average of £164). 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 LON?

Find hourly flight availability from Washington to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 April 2025.

When flying from State of Washington to London, 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

Explore weekly flight availability from Washington to London. 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 30 April 2025.

The most flights from USWA to LON 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 London by month

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

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

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

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 30 April 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and KLM from Washington to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

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
7,936 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

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
9,968 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

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
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

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
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

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.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

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 London. 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 one-way?

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at £213. JetBlue flights start at £271 while deals on British Airways start at £281 one-way.

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

    The most popular route from State of Washington to London is Seattle/Tacoma Intl - London Heathrow. You may also consider Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from State of Washington to London on time: Scandinavian Airlines (90%), KLM (85%), Aeromexico (85%).

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

    On average you can expect to pay £515 for a flight from State of Washington to London. The cheapest flight overall is £293 while the most popular route, (Seattle/Tacoma Intl - London Heathrow) is currently priced at £362.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to London 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?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to London (average of £112). Flying from State of Washington to London in August is currently the most expensive (average of £164). 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

Travelling to a place near Washington?

Book flights to Washington if you plan to visit one of these locations
Deal
Hounslow
Milton Keynes
Gatwick
Luton
Slough
Croydon
Eastbourne
Southend-on-Sea
Ilford
Crawley
Hayes
Ipswich
Watford
Wembley
Folkestone
Maidstone
Winchester
Dartford
Guildford

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Alternative routes for Washington to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Washington to London

Discover the top 5 airlines that operate flights from Washington to London. 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 858,174 searches. Data last updated 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£361Average£494FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£429Average£547FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Virgin AtlanticCheapest£448Average£709FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£457Average£843FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£494Average£797FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington to London?

When you search for this flight from Washington to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Washington to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Washington to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Washington to London with no change fees?

Yes! Cheapflights helps users easily find flights from Washington to London with no change fees.

Can Cheapflights notify me if prices for flights from Washington to London become cheaper?

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

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