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Cheap flights from London to Washington from £416

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
22 Jan — 29 Jan1
1 adult

Cheap flight deals from London to Washington

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Washington (USWA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 January 2025.

Round-trip from

£438

One-way from

£417
Delta
  • Delta
  • 26/2-4/3
  • Nonstop
  • 19h 46m total
  • London to Washington
Search Deals
Icelandair
  • Icelandair
  • 19/4
  • 1 total stop
  • 34h 10m total
  • London to Washington
Search Deals

Find flight deals from London to Washington

Cheapest flights from London to Washington
Explore the most affordable flight options available from London to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 January 2025.

Mon 3/211:10LHR - SEA
2 stops18h 01mUnited Airlines
Sun 9/223:17SEA - LHR
1 stop13h 18mUnited Airlines
Deal found 17/1£437
Wed 26/206:30LHR - SEA
2 stops18h 25mDelta
Tue 4/322:55SEA - LHR
1 stop13h 15mDelta
Deal found 16/1£438
Fri 7/211:55LGW - SEA
1 stop13h 05mIcelandair
Sun 9/214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 16/1£439
Wed 20/809:30LHR - SEA
1 stop14h 30mAmerican Airlines
Thu 18/913:30SEA - LHR
Nonstop9h 20mAmerican Airlines
Deal found 16/1£439
Wed 22/115:00LHR - SEA
2 stops31h 30mMultiple Airlines
Wed 29/109:20SEA - LHR
2 stops16h 50mMultiple Airlines
Deal found 15/1£439
Wed 19/209:25LCY - SEA
2 stops19h 50mSWISS
Tue 25/212:37SEA - LCY
2 stops22h 03mSWISS
Deal found 16/1£441
Tue 28/106:20LHR - SEA
1 stop13h 00mVirgin Atlantic
Tue 4/217:45SEA - LHR
Nonstop9h 25mVirgin Atlantic
Deal found 16/1£442
Mon 3/218:45LGW - SEA
2 stops36h 08mSWISS
Sun 9/215:25SEA - LGW
2 stops18h 25mSWISS
Deal found 16/1£443
Mon 3/218:40LHR - SEA
2 stops36h 13mSWISS
Sun 9/212:50SEA - LHR
2 stops21h 00mSWISS
Deal found 17/1£447
Fri 7/212:40LHR - SEA
Nonstop10h 00mAir France
Thu 13/217:45SEA - LHR
Nonstop9h 25mAir France
Deal found 16/1£451
Thu 13/206:30STN - SEA
2 stops18h 30mMultiple Airlines
Thu 20/214:35SEA - STN
2 stops25h 05mMultiple Airlines
Deal found 16/1£452
Tue 4/213:25LHR - SEA
2 stops16h 42mAir Canada
Mon 10/210:35SEA - LHR
1 stop15h 35mAir Canada
Deal found 17/1£455

Find flights from London to Washington within your budget

Customise your flight search to find flights from London to Washington 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 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 3/2

11:10-21:11

2 stops18h 01m

Seattle/Tacoma Intl

Sun 9/2

23:17-20:35

1 stop13h 18m

£437

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 26/2

06:30-16:55

2 stops18h 25m

Seattle/Tacoma Intl

Tue 4/3

22:55-20:10

1 stop13h 15m

£438

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 7/2

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Sun 9/2

14:35-10:55

1 stop12h 20m

£439

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 28/1

15:00-16:55

Nonstop9h 55m

Seattle/Tacoma Intl

Tue 4/2

13:35-07:00

Nonstop9h 25m

£439

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Fri 7/2

07:40-13:20

1 stop13h 40m

Seattle/Tacoma Intl

Sun 9/2

23:17-20:35

1 stop13h 18m

£439

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 18/2

09:30-21:30

2 stops20h 00m

Seattle/Tacoma Intl

Sat 1/3

10:35-10:10

1 stop15h 35m

£440

LondonSeattle

LCY - SEA

LCYSEA

London City

Wed 19/2

09:25-21:15

2 stops19h 50m

Seattle/Tacoma Intl

Tue 25/2

12:37-18:40

2 stops22h 03m

£441

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 28/1

06:20-11:20

1 stop13h 00m

Seattle/Tacoma Intl

Tue 4/2

17:45-11:10

Nonstop9h 25m

£442

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 3/2

18:45-22:53

2 stops36h 08m

Seattle/Tacoma Intl

Sun 9/2

15:25-17:50

2 stops18h 25m

£443

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 3/2

18:40-22:53

2 stops36h 13m

Seattle/Tacoma Intl

Sun 9/2

12:50-17:50

2 stops21h 00m

£447

Flights are sorted by cheapest return flights first.

Deals found on 16/1

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

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

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

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

Currently, January is the cheapest month in which you can book a flight from London to State of Washington (average of £622). Flying from London to State of Washington in July is currently the most expensive (average of £946). 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 LON to WA?

Find hourly flight availability from London to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 January 2025.

When flying from London to State of Washington, 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 London to State of Washington

Explore weekly flight availability from London to Washington. 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 17 January 2025.

The most flights from LON to USWA 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 (6 on average).

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated 17 January 2025.
See what other customers who have flown with SWISS, Finnair and American Airlines from London to Washington have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.1
Very Good
3,351 reviews
Check prices

Food

7.9

Overall

8.1

Entertainment

8.2

Comfort

8.0

Boarding

8.1

Crew

8.3

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Emirates
8.1
Very Good
3,351 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Food

7.9

Overall

8.1

Entertainment

8.2

Comfort

8.0

Boarding

8.1

Crew

8.3

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Delta
8.0
Very Good
8,512 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Food

7.9

Overall

8.1

Entertainment

8.2

Comfort

8.0

Boarding

8.1

Crew

8.3

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

KLM
7.8
Good
1,339 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Food

7.9

Overall

8.1

Entertainment

8.2

Comfort

8.0

Boarding

8.1

Crew

8.3

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Finnair
7.6
Good
1,285 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Food

7.9

Overall

8.1

Entertainment

8.2

Comfort

8.0

Boarding

8.1

Crew

8.3

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

SWISS
7.5
Good
1,598 reviews
Emirates
8.1
Very Good
3,351 reviews
Check prices

Food

7.9

Overall

8.1

Entertainment

8.2

Comfort

8.0

Boarding

8.1

Crew

8.3

Reviews

1 / 10

It was not a good experience the seats were small and uncomfortable the food was not good and they forgot to serve me my breakfast - there were 5 us in 2 rows that they just completely skipped us. Very disappointed.

Related info for your journey

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at £417. Aer Lingus flights start at £427 while deals on Finnair start at £431 one-way.

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

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

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

    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 London to State of Washington on time: KLM (75%), Air France (75%), Delta (75%).

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

    On average you can expect to pay £2,063 for a flight from London to State of Washington. The cheapest flight overall is £435 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £363.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from London to State of Washington (average of £622). Flying from London to State of Washington in July is currently the most expensive (average of £946). 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

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Alternative routes for London to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from London to Washington

Discover the top 10 airlines that operate flights from London to Washington. 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 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£324Average£909FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£357Average£569FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£438Average£695FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£438Average£624FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£453Average£712FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air FranceCheapest£456Average£643FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£457Average£602FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£465Average£979FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£471Average£638FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£476Average£796FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 London to Washington?

Deals for London to Washington flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from London to Washington by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes, we can. To see specific flights from London to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes! Start tracking prices for London to Washington flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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