What are the cheapest airlines flying from London to Washington, D.C. round-trip?

Flying on Finnair is currently your cheapest option to Washington, D.C., with prices starting at $657. Additional round-trip tickets that might be worth considering are offered by American Airlines and TAP AIR PORTUGAL, with the lowest prices starting at $658 and $659, respectively. These flights start at 11% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from London to Washington, D.C. one-way?

One-way options have recently been found by users for as low as $407 on PLAY. Other airlines that offer cheap prices include WorldTicket from $429 and TAP AIR PORTUGAL from $506 one-way.

What are the most popular routes from London to Washington, D.C.?

While some choose either London Heathrow - Baltimore/Washington or London Gatwick - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C..

What are the cheapest flights from London to Washington, D.C.?

Looking at all options, your cheapest flight can be booked for $598. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $441 on average our data indicates $2,233 when flying from London to Washington, D.C..

What are the most reliable airlines from London to Washington, D.C.?

Before booking your flight to Washington, D.C. from London, check out the most reliable airlines to get you to your destination on time: American Airlines (57%), Aer Lingus (57%), Finnair( 57%).

What are the most popular airlines that fly from London to Washington, D.C.?

When booking a flight from London to Washington, D.C., you may want to consider flying on American Airlines, British Airways or Icelandair as they are the most popular for this route.

What is the cheapest day to fly round-trip from London to Washington, D.C.?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from London to Washington, D.C.?

Find a great deal and save up to 35% by booking at least 50 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London to Washington, D.C. within the next two weeks, with the cheapest ticket starting at $752.

What is the cheapest month to fly from London to Washington, D.C.?

February is one of the best times of the year to fly to Washington, D.C. from London. Prices for February average $743 per person but you can even find prices for as low as $305. The most expensive prices can be found in the month of July. Opting for a February flight can save you 21% on your journey compared to booking in July

Can I find deals for flights from London to Washington, D.C. that include hotel bookings?

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

How can I find direct flights from London to Washington, D.C.?

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

Can I find deals for business class flights from London to Washington, D.C.?

Yes. Cheapflights offers flight deals from London to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$368+ Flights from London to Washington, D.C.

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Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or November, booked 84 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from London to Washington, D.C.

Round-trip from	$657 (ChecknFly)
One-way from	$368 (Norse)
Popular in	July
Cheapest in	February
Average price	$833
Good round-trip deal	$747 or less
Good one-way deal	$654 or less

From London (LON) to Washington, D.C. (WAS)

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One-way flight from London (LON) to Washington, D.C. (WAS)

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Highest demand for flights based on searches. 14% potential increase in price ($125 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Price to beat on a round-trip flight from London (LON) to Washington, D.C. (WAS).

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Price to beat on a one-way flight from London (LON) to Washington, D.C. (WAS).

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Find flight deals from London to Washington, D.C.

Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Tue 11/49:55 amLHR - IAD

1 stop14h 36mFinnair

Fri 11/78:50 amIAD - LHR

2 stops18h 45mFinnair

Deal found 6/10

$657

Fri 9/2612:20 pmLGW - DCA

2 stops15h 44mAmerican Airlines

Mon 9/291:44 pmDCA - LGW

2 stops13h 26mAmerican Airlines

Deal found 6/10

$658

Tue 10/144:25 pmLGW - IAD

1 stop27h 55mTAP AIR PORTUGAL

Thu 11/135:30 pmIAD - LGW

2 stops34h 55mTAP AIR PORTUGAL

Deal found 6/10

$659

Fri 8/2211:00 amLHR - DCA

1 stop12h 38mAmerican Airlines

Wed 10/83:21 pmDCA - LHR

1 stop11h 29mAmerican Airlines

Deal found 6/10

$659

Tue 9/169:20 amLCY - IAD

1 stop11h 15mVirgin Atlantic

Tue 9/301:00 pmIAD - LCY

2 stops14h 10mVirgin Atlantic

Deal found 6/10

$659

Wed 10/86:40 amLHR - IAD

2 stops18h 19mScandinavian Airlines

Sun 10/1210:05 pmIAD - LHR

2 stops13h 55mScandinavian Airlines

Deal found 6/10

$660

Tue 6/176:30 amLHR - IAD

1 stop14h 05mKLM

Tue 6/2412:49 pmIAD - LHR

1 stop12h 56mKLM

Deal found 6/10

$661

Tue 6/178:40 amLHR - IAD

1 stop11h 55mVirgin Atlantic

Tue 6/243:31 pmIAD - LHR

2 stops14h 54mVirgin Atlantic

Deal found 6/10

$662

Fri 10/316:30 amLHR - DCA

2 stops15h 37mMultiple Airlines

Mon 11/312:55 pmDCA - LHR

2 stops13h 15mMultiple Airlines

Deal found 6/12

$663

Wed 9/106:15 pmLHR - DCA

1 stop18h 49mVirgin Atlantic

Wed 10/111:00 amDCA - LHR

1 stop14h 25mVirgin Atlantic

Deal found 6/11

$664

Sun 10/197:50 pmLHR - IAD

1 stop24h 30mTAP AIR PORTUGAL

Wed 10/2911:30 pmIAD - LHR

1 stop18h 05mTAP AIR PORTUGAL

Deal found 6/12

$665

Tue 10/712:10 pmLGW - DCA

1 stop13h 41mJetBlue

Mon 10/136:55 pmDCA - LGW

1 stop9h 40mJetBlue

Deal found 6/9

$665

Best flights from London to Washington, D.C.
Discover carefully curated flight deals from London to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Tue 11/49:55 amLHR - IAD

1 stop14h 36mFinnair

Fri 11/78:50 amIAD - LHR

2 stops18h 45mFinnair

Deal found 6/10

$657

Fri 9/2612:20 pmLGW - DCA

2 stops15h 44mAmerican Airlines

Mon 9/291:44 pmDCA - LGW

2 stops13h 26mAmerican Airlines

Deal found 6/10

$658

Tue 10/144:25 pmLGW - IAD

1 stop27h 55mTAP AIR PORTUGAL

Thu 11/135:30 pmIAD - LGW

2 stops34h 55mTAP AIR PORTUGAL

Deal found 6/10

$659

Tue 9/169:20 amLCY - IAD

1 stop11h 15mVirgin Atlantic

Tue 9/301:00 pmIAD - LCY

2 stops14h 10mVirgin Atlantic

Deal found 6/10

$659

Wed 10/86:40 amLHR - IAD

2 stops18h 19mScandinavian Airlines

Sun 10/1210:05 pmIAD - LHR

2 stops13h 55mScandinavian Airlines

Deal found 6/10

$660

Sat 10/1812:15 pmLHR - IAD

Nonstop8h 15mUnited Airlines

Sat 10/185:37 pmIAD - LHR

1 stop31h 53mUnited Airlines

Deal found 6/10

$661

Tue 10/712:10 pmLGW - DCA

1 stop13h 41mJetBlue

Mon 10/136:55 pmDCA - LGW

1 stop9h 40mJetBlue

Deal found 6/9

$665

Tue 8/1212:35 pmLHR - IAD

Nonstop8h 25mDelta

Wed 9/105:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 6/12

$671

Tue 6/246:00 amLHR - DCA

3 stops35h 03mMultiple Airlines

Sat 7/126:59 amDCA - LHR

2 stops18h 31mMultiple Airlines

Deal found 6/11

$673

Wed 7/912:10 pmLGW - DCA

1 stop24h 44mIcelandair

Wed 7/161:44 pmDCA - LGW

1 stop14h 51mIcelandair

Deal found 6/11

$675

Fri 6/202:05 pmLHR - DCA

1 stop12h 43mAir Canada

Sun 9/144:35 pmDCA - LHR

1 stop12h 00mAir Canada

Deal found 6/11

$675

Fri 10/311:30 pmLCY - IAD

1 stop32h 00mSWISS

Mon 11/35:25 pmIAD - LCY

1 stop18h 40mSWISS

Deal found 6/12

$678

Last-minute flights from London to Washington, D.C.
Discover last-minute flight deals from London to Washington, D.C.. Data last updated June 12, 2025 and is based on user searches.

Tue 6/176:30 amLHR - IAD

1 stop14h 05mKLM

Tue 6/2412:49 pmIAD - LHR

1 stop12h 56mKLM

Deal found 6/10

$661

Tue 6/178:40 amLHR - IAD

1 stop11h 55mVirgin Atlantic

Tue 6/243:31 pmIAD - LHR

2 stops14h 54mVirgin Atlantic

Deal found 6/10

$662

Tue 6/1712:00 pmLGW - DCA

1 stop16h 33mVirgin Atlantic

Thu 7/1011:00 amDCA - LGW

1 stop18h 00mVirgin Atlantic

Deal found 6/10

$670

Tue 6/1712:00 pmLGW - IAD

1 stop12h 50mVirgin Atlantic

Thu 7/1012:12 pmIAD - LGW

1 stop16h 48mVirgin Atlantic

Deal found 6/10

$670

Tue 6/179:20 amLCY - IAD

1 stop11h 15mVirgin Atlantic

Thu 7/105:25 pmIAD - LCY

1 stop10h 25mVirgin Atlantic

Deal found 6/10

$707

Tue 6/1712:00 pmLGW - IAD

1 stop12h 50mVirgin Atlantic

Thu 7/1010:14 amIAD - LGW

2 stops18h 46mVirgin Atlantic

Deal found 6/10

$670

Wed 6/189:25 amLCY - IAD

1 stop11h 50mSWISS

Sun 9/148:45 pmIAD - LCY

1 stop15h 45mSWISS

Deal found 6/11

$677

Thu 6/198:15 amLHR - DCA

1 stop19h 44mJetBlue

Mon 6/306:50 pmDCA - LHR

1 stop30h 40mJetBlue

Deal found 6/10

$691

Thu 6/195:00 pmLHR - IAD

Nonstop8h 10mFinnair

Tue 7/299:03 amIAD - LHR

2 stops16h 17mFinnair

Deal found 6/12

$701

Thu 6/198:40 amLHR - IAD

1 stop11h 55mDelta

Tue 7/155:50 pmIAD - LHR

Nonstop7h 30mDelta

Deal found 6/12

$706

Thu 6/195:00 pmLHR - IAD

Nonstop8h 10mBritish Airways

Tue 7/157:25 pmIAD - LHR

Nonstop7h 20mBritish Airways

Deal found 6/10

$712

Fri 6/202:05 pmLHR - DCA

1 stop12h 43mAir Canada

Sun 9/144:35 pmDCA - LHR

1 stop12h 00mAir Canada

Deal found 6/11

$675

One-way flights from London to Washington, D.C.
Search for one-way flight options from London to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Sat 9/132:00 pmLGW - BWI

1 stop14h 27mMultiple Airlines

Deal found 6/10

$368

Tue 9/91:10 pmLHR - BWI

2 stops23h 23mMultiple Airlines

Deal found 6/10

$387

Mon 11/37:30 amSTN - BWI

2 stops38h 25mMultiple Airlines

Deal found 6/12

$395

Wed 9/1011:40 amSTN - BWI

1 stop11h 00mPLAY

Deal found 6/10

$407

Fri 6/2010:00 amLGW - IAD

1 stop16h 12mMultiple Airlines

Deal found 6/10

$413

Thu 8/146:20 amLHR - IAD

3 stops32h 56mMultiple Airlines

Deal found 6/11

$418

Fri 11/1410:55 amSTN - BWI

1 stop11h 00mWorldTicket

Deal found 6/10

$429

Sun 8/179:30 pmSTN - IAD

2 stops46h 26mMultiple Airlines

Deal found 6/11

$430

Wed 6/258:50 amLGW - DCA

3 stops32h 13mMultiple Airlines

Deal found 6/10

$439

Wed 10/86:00 amLHR - IAD

1 stop14h 20mTAP AIR PORTUGAL

Deal found 6/10

$506

Sat 11/810:20 amLHR - IAD

1 stop13h 30mScandinavian Airlines

Deal found 6/11

$541

Mon 11/177:50 amLHR - IAD

1 stop12h 45mAer Lingus

Deal found 6/10

$550

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 11/4

9:55 am-7:31 pm

1 stop14h 36m

Washington, D.C. Dulles Intl

Fri 11/7

8:50 am-8:35 am

2 stops18h 45m

$657

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 9/26

12:20 pm-11:04 pm

2 stops15h 44m

Washington, D.C. Reagan-National

Mon 9/29

1:44 pm-8:10 am

2 stops13h 26m

$658

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Tue 10/14

4:25 pm-3:20 pm

1 stop27h 55m

Washington, D.C. Dulles Intl

Thu 11/13

5:30 pm-9:25 am

2 stops34h 55m

$659

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Tue 9/16

9:20 am-3:35 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Tue 9/30

1:00 pm-8:10 am

2 stops14h 10m

$659

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 8/22

11:00 am-6:38 pm

1 stop12h 38m

Washington, D.C. Reagan-National

Wed 10/8

3:21 pm-7:50 am

1 stop11h 29m

$659

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 10/8

6:40 am-7:59 pm

2 stops18h 19m

Washington, D.C. Dulles Intl

Sun 10/12

10:05 pm-5:00 pm

2 stops13h 55m

$660

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 10/18

12:15 pm-3:30 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sat 10/18

5:37 pm-6:30 am

1 stop31h 53m

$661

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 9/6

8:40 am-3:35 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Fri 9/12

5:50 pm-6:20 am

Nonstop7h 30m

$662

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 10/31

6:30 am-6:07 pm

2 stops15h 37m

Washington, D.C. Reagan-National

Mon 11/3

12:55 pm-7:10 am

2 stops13h 15m

$663

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Tue 10/7

12:10 pm-8:51 pm

1 stop13h 41m

Washington, D.C. Reagan-National

Mon 10/13

6:55 pm-9:35 am

1 stop9h 40m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 60 results

...

The best insider tips for London to Washington, D.C. flights

Cheapflights partnered with top experts to bring you the best recommendations for your London to Washington, D.C. trip

Airlines

British Airways

BA's Club Suite offers private pods with doors for enhanced privacy on long-haul flights.

BA's World Traveller Plus provides extra seat width, legroom, and upgraded service on long-haul flights.

Read more about British Airwaysby Gabriel Leigh

United Airlines

United's Polaris Business Class features lie-flat seats, large screens, and Saks Fifth Avenue bedding.

United's Premium Plus offers bigger seats, extra legroom, and upgraded meals on international flights.

Read more about United Airlinesby Harriet Baskas

Airports

LHR

Heathrow's strict security can cause delays. Ensure all liquids are in a single bag and remove suspicious items to avoid long waits.

IAD

Use the Silver Line Metro for a cost-effective trip to Washington, D.C. It takes under 40 minutes and is five minutes from the terminal.

Our travel experts

Gabriel Leigh

Expert on British Airways

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on LHR and IAD

Best time to book a flight from London to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London 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 London to Washington, D.C.

How far ahead should I book a flight from London to Washington, D.C.?

To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $241). Flying from London to Washington, D.C. in March is currently the most expensive (average of $290). 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 WAS?

A simple way to save on the total cost of your ticket is to fly from London to Washington, D.C. in the evening. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from London to Washington, D.C.?

Travelers seeking maximum savings on their London to Washington, D.C. flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Washington, D.C.

The most flights from LON to WAS are scheduled on a Wednesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

Rainfall in Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from London to Washington, D.C. to help guide your decision. 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

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,950 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

802 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,290 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from London to Washington, D.C. round-trip?
Flying on Finnair is currently your cheapest option to Washington, D.C., with prices starting at $657. Additional round-trip tickets that might be worth considering are offered by American Airlines and TAP AIR PORTUGAL, with the lowest prices starting at $658 and $659, respectively. These flights start at 11% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London to Washington, D.C. one-way?
One-way options have recently been found by users for as low as $407 on PLAY. Other airlines that offer cheap prices include WorldTicket from $429 and TAP AIR PORTUGAL from $506 one-way.
What are the most popular routes from London to Washington, D.C.?
While some choose either London Heathrow - Baltimore/Washington or London Gatwick - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C..
What are the most reliable airlines from London to Washington, D.C.?
Before booking your flight to Washington, D.C. from London, check out the most reliable airlines to get you to your destination on time: American Airlines (57%), Aer Lingus (57%), Finnair( 57%).
What are the cheapest flights from London to Washington, D.C.?
Looking at all options, your cheapest flight can be booked for $598. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $441 on average our data indicates $2,233 when flying from London to Washington, D.C..
Can I find deals for flights from London to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on London to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Washington, D.C..
Can I find deals for business class flights from London to Washington, D.C.?
Yes. Cheapflights offers flight deals from London to Washington, D.C. 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 Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $241). Flying from London to Washington, D.C. in March is currently the most expensive (average of $290). 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

Arlington

Alexandria

Woodbridge

Tysons

Silver Spring

Linthicum Heights

Fredericksburg

Gaithersburg

Fairfax

Falls Church

Easton

Herndon

Towson

Bowie

Rockville

Reston

National Harbor

Springfield

Manassas

Dundalk

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for London to Washington, D.C.

Complete your trip

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Top 10 airlines flying from London to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest$304	Average$502	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$986	FlexibilityNo cancel fee	On-time78%
Icelandair	Cheapest$529	Average$993	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$564	Average$804	FlexibilityNo cancel fee	On-timeN/A
British Airways	Cheapest$595	Average$871	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$619	Average$787	FlexibilityNo cancel fee	On-time71%
Aer Lingus	Cheapest$652	Average$812	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$652	Average$984	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$682	Average$886	FlexibilityNo cancel fee	On-time69%

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$368+ Cheap flights from London (LON) to Washington, D.C. (WAS)

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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or November, booked 84 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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Cheapest flights from London to Washington, D.C.Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

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Best time to book a flight from London to Washington, D.C.

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

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Everything you need to know about your flight from London to Washington, D.C.

How far ahead should I book a flight from London to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from London to Washington, D.C.. Price data was last updated on June 9, 2025.

What is the cheapest month to book a flight from London to Washington, D.C.?

What is the cheapest time of day to fly from LON to WAS?

Find hourly flight availability from London to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

What is the cheapest day to fly from London to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from London to Washington, D.C.. Price data was last updated on December 16, 2024.

Weekly flight availability from London to Washington, D.C.

Rainfall in Washington, D.C. by month

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

Temperature in Washington, D.C. by month

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

Reviews of airlines servicing Washington, D.C.

Related info for your journey

Find useful and relevant information for your journey from London to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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Can I find deals for flights from London to Washington, D.C. that include hotel bookings?

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Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.