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Cheap flights from Washington to London from £196

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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
26 Feb — 5 Mar1
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 21 February 2025.

Round-trip from

£463

One-way from

£196

Popular in

June

Cheapest in

January

Average price

£562

Good round-trip deal

£486 or less

Good one-way deal

£311 or less
Icelandair
  • Icelandair
  • 1/4-29/4
  • 2 total stops
  • 25h 00m total
  • Washington to London
Search Deals
1/4
  • 1/4
  • 2 total stops
  • 31h 47m total
  • Washington to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£146 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
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).
Search Deals

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 21 February 2025.

Tue 1/415:45SEA - LGW
1 stop12h 00mIcelandair
Tue 29/415:40LGW - SEA
1 stop13h 00mIcelandair
Deal found 21/2£463
Tue 1/418:45SEA - LHR
1 stop12h 10mAer Lingus
Thu 10/407:40LHR - SEA
1 stop17h 19mAer Lingus
Deal found 20/2£463
Sat 1/314:35SEA - LHR
1 stop12h 15mIcelandair
Wed 5/312:15LHR - SEA
1 stop12h 45mIcelandair
Deal found 21/2£464
Fri 7/310:35SEA - LHR
1 stop15h 35mMultiple Airlines
Mon 17/319:15LHR - SEA
1 stop26h 05mMultiple Airlines
Deal found 21/2£474
Tue 1/420:20SEA - LHR
Nonstop9h 20mIberia
Tue 29/409:25LHR - SEA
Nonstop9h 45mIberia
Deal found 20/2£475
Wed 30/412:30SEA - LGW
2 stops33h 50mMultiple Airlines
Mon 5/518:50LGW - SEA
2 stops33h 38mMultiple Airlines
Deal found 20/2£478
Wed 8/1016:20SEA - LHR
1 stop21h 20mScandinavian Airlines
Wed 15/1006:40LHR - SEA
1 stop15h 20mScandinavian Airlines
Deal found 21/2£480
Thu 1/519:40PDX - LHR
1 stop33h 40mMultiple Airlines
Thu 8/506:00LHR - PDX
2 stops20h 45mMultiple Airlines
Deal found 20/2£482
Tue 1/415:05SEA - LHR
1 stop14h 15mAir Canada
Tue 29/409:30LHR - SEA
2 stops16h 58mAir Canada
Deal found 20/2£486
Tue 11/307:35PDX - LHR
1 stop16h 45mIberia
Tue 18/308:20LHR - PDX
1 stop21h 40mIberia
Deal found 19/2£486
Sat 1/320:28PDX - LGW
1 stop30h 07mMultiple Airlines
Tue 11/312:00LGW - PDX
1 stop32h 38mMultiple Airlines
Deal found 19/2£489
Wed 12/319:55SEA - LHR
Nonstop9h 45mKLM
Tue 18/306:30LHR - SEA
1 stop13h 10mKLM
Deal found 21/2£490

Find flights from Washington to London within your budget

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 21 February 2025.

Fly from

Washington

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 1/4

15:45-11:45

1 stop12h 00m

London Gatwick

Tue 29/4

15:40-20:40

1 stop13h 00m

£463

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 1/4

18:45-14:55

1 stop12h 10m

London Heathrow

Thu 10/4

07:40-16:59

1 stop17h 19m

£463

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 30/3

15:45-11:55

1 stop12h 10m

London Heathrow

Sun 13/4

21:25-20:40

1 stop31h 15m

£464

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 7/3

10:35-10:10

1 stop15h 35m

London Heathrow

Mon 17/3

19:15-14:20

1 stop26h 05m

£474

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 1/4

20:20-13:40

Nonstop9h 20m

London Heathrow

Tue 29/4

09:25-11:10

Nonstop9h 45m

£475

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 30/4

12:30-06:20

2 stops33h 50m

London Gatwick

Mon 5/5

18:50-20:28

2 stops33h 38m

£478

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 7/4

10:30-11:50

2 stops17h 20m

London Heathrow

Fri 18/4

14:10-18:28

1 stop12h 18m

£482

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 1/5

19:40-13:20

1 stop33h 40m

London Heathrow

Thu 8/5

06:00-18:45

2 stops20h 45m

£482

SeattleLondon

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 1/4

15:05-13:20

1 stop14h 15m

London Heathrow

Tue 29/4

09:30-18:28

2 stops16h 58m

£486

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 11/3

07:35-07:20

1 stop16h 45m

London Heathrow

Tue 18/3

08:20-23:00

1 stop21h 40m

£486

Flights are sorted by cheapest return flights first.

Deals found on 19/2

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.

Travel insights for flights from Washington to London

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

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 £163). 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 21 February 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 21 February 2025.

The most flights from USWA to LON are scheduled on a Friday (22 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 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 21 February 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair 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
8,213 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
8,213 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
1,331 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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.

Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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.

Austrian Airlines
7.6
Good
773 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
1,568 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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 WestJet, which is currently one of the cheapest options available, starting at £213. Icelandair flights start at £220 while deals on Air Canada start at £323 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: Aeromexico (82%), Singapore Airlines (81%), American Airlines (72%).

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

    On average you can expect to pay £700 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 £429.

  • 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 £163). 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
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Ilford
Hayes
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Wembley
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Ipswich
Winchester
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Crawley
Southall
Watford
Dartford
Stansted

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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 4 airlines flying from Washington to London

Discover the top 4 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£384Average£464FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£456Average£910FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Virgin AtlanticCheapest£476Average£684FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£486Average£911FlexibilityNo cancel feeOn-time70%
Search British Airways 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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