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

According to our current data, Icelandair ($513), Iberia ($565), and Virgin Atlantic ($588) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London. Icelandair is priced at 30% lower than the current average price of a flight leaving 3 months from now.

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

The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $243. However, be on the lookout for offers from Icelandair and Virgin Atlantic, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.

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

When deciding which route to take from Washington, D.C. Dulles Intl Airport to London consider Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick or Washington, D.C. Dulles Intl - London City as they are the most popular.

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

While on average a flight from Washington, D.C. Dulles Intl Airport to London is generally $2,453, our data shows the cheapest flight currently is $399. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $483 for that flight.

What are the most reliable airlines from Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport to London on time: Delta (94%), Singapore Airlines (92%), Virgin Atlantic (92%).

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

The most popular airlines flying from Washington, D.C. Dulles Intl Airport to London are American Airlines, Air Canada and Finnair. Something to consider prior to booking your flight.

Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London?

Of the flights from Washington, D.C. Dulles Intl Airport to London that have layovers, most of them stop in Reykjavik.

Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London flights?

The least popular layover on flights from Washington, D.C. Dulles Intl Airport to London is Dublin.

What are some popular things to do or see while on a layover in Reykjavik?

Reykjavik travelers tend to visit Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool more than anywhere else. Hallgrímskirkja, Harpa and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl if you are interested in checking them out. Those landing in Reykjavik looking to spend some time exploring during their layover can rent a car for about $49 per day.

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

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

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

The best pricing can be found in the month of January. Prices to London from Washington, D.C. Dulles Intl Airport average $743. You can even find prices in January for less than $743, as users have found deals to London from as low as $385. The month of June appears to be one of the more expensive times to travel to London from Washington, D.C. Dulles Intl Airport. Flying in the targeted month can save you up to 31%.

Most accurate provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Dulles Intl to London that include hotel bookings?

Yes. In addition to deals on Dulles Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Dulles Intl to London?

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

Can I find deals for business class flights from Dulles Intl to London?

Yes. Cheapflights offers flight deals from Dulles Intl 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.

$243+ Flights from Washington, D.C. Dulles Intl Airport to London

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London are usually found in January or October, booked 85 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Dulles Intl to London

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$513 (oojo)
One-way from	$243 (oojo)
Popular in	June
Cheapest in	January
Average price	$728
Good round-trip deal	$700 or less
Good one-way deal	$468 or less

Provider with most accurate pricing for Washington, D.C. Dulles Intl-London (LON) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-London (LON) flights.

Search Deals

From Washington, D.C. Dulles Intl to London (LON)

Search Deals

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

Search Deals

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

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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

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

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Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

Thu 10/168:30 pmIAD - LHR

1 stop10h 25mIcelandair

Sat 10/259:25 pmLHR - IAD

1 stop26h 50mIcelandair

Deal found 4/15

$514

Sat 5/38:30 pmIAD - LGW

1 stop10h 15mIcelandair

Tue 5/133:40 pmLGW - IAD

1 stop32h 40mIcelandair

Deal found 4/15

$522

Mon 4/2810:40 pmIAD - LHR

Nonstop7h 25mIberia

Tue 5/612:45 pmLHR - IAD

Nonstop8h 00mIberia

Deal found 4/15

$584

Sun 4/277:46 pmIAD - LHR

1 stop12h 44mVirgin Atlantic

Tue 5/68:40 amLHR - IAD

1 stop11h 55mVirgin Atlantic

Deal found 4/15

$593

Wed 7/236:10 amIAD - LGW

2 stops22h 50mVirgin Atlantic

Wed 8/2012:00 pmLGW - IAD

1 stop12h 37mVirgin Atlantic

Deal found 4/14

$597

Mon 12/18:30 pmIAD - LHR

2 stops41h 20mScandinavian Airlines

Sat 12/65:30 pmLHR - IAD

2 stops52h 45mScandinavian Airlines

Deal found 4/14

$598

Wed 4/3010:15 pmIAD - LHR

Nonstop7h 25mUnited Airlines

Mon 5/512:10 pmLHR - IAD

1 stop33h 05mUnited Airlines

Deal found 4/14

$601

Tue 5/68:45 pmIAD - LGW

1 stop16h 05mSWISS

Tue 5/136:35 pmLGW - IAD

1 stop26h 40mSWISS

Deal found 4/14

$605

Sun 4/278:14 pmIAD - LHR

1 stop11h 16mAmerican Airlines

Thu 5/86:15 amLHR - IAD

1 stop13h 45mAmerican Airlines

Deal found 4/15

$605

Tue 5/610:20 pmIAD - LGW

1 stop12h 15mTAP AIR PORTUGAL

Tue 5/204:25 pmLGW - IAD

1 stop27h 55mTAP AIR PORTUGAL

Deal found 4/15

$607

Sun 9/211:00 pmIAD - LHR

1 stop16h 00mMultiple Airlines

Tue 9/306:00 amLHR - IAD

2 stops15h 10mMultiple Airlines

Deal found 4/14

$608

Tue 9/99:55 amIAD - LHR

1 stop15h 35mAir Canada

Tue 9/236:00 amLHR - IAD

2 stops15h 22mAir Canada

Deal found 4/15

$610

Best flights from Dulles Intl to London
Discover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 15, 2025.

Thu 10/28:30 pmIAD - LHR

1 stop18h 50mIcelandair

Sat 10/111:05 pmLHR - IAD

1 stop11h 15mIcelandair

Deal found 4/15

$513

Tue 9/235:50 pmIAD - LHR

Nonstop7h 25mIberia

Thu 10/912:45 pmLHR - IAD

Nonstop8h 10mIberia

Deal found 4/15

$565

Sun 4/275:50 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 5/66:15 amLHR - IAD

1 stop18h 00mVirgin Atlantic

Deal found 4/15

$588

Sun 8/1710:05 pmIAD - LHR

1 stop30h 15mScandinavian Airlines

Tue 8/267:30 pmLHR - IAD

1 stop29h 29mScandinavian Airlines

Deal found 4/14

$597

Mon 5/510:20 pmIAD - LGW

1 stop12h 15mTAP AIR PORTUGAL

Wed 5/74:25 pmLGW - IAD

1 stop27h 55mTAP AIR PORTUGAL

Deal found 4/14

$598

Mon 5/128:30 pmIAD - LGW

1 stop10h 15mMultiple Airlines

Thu 5/2210:00 amLGW - IAD

1 stop33h 53mMultiple Airlines

Deal found 4/13

$600

Sun 4/278:45 pmIAD - LGW

1 stop16h 05mSWISS

Tue 5/66:35 pmLGW - IAD

1 stop26h 40mSWISS

Deal found 4/15

$601

Sun 4/275:40 pmIAD - LHR

Nonstop7h 35mAmerican Airlines

Thu 5/86:15 amLHR - IAD

1 stop13h 45mAmerican Airlines

Deal found 4/15

$601

Wed 5/76:30 pmIAD - LHR

Nonstop7h 25mUnited Airlines

Thu 5/158:40 amLHR - IAD

1 stop12h 35mUnited Airlines

Deal found 4/15

$603

Sun 4/272:12 pmIAD - LHR

1 stop13h 53mBritish Airways

Thu 5/86:15 amLHR - IAD

1 stop13h 45mBritish Airways

Deal found 4/15

$607

Tue 9/99:55 amIAD - LHR

1 stop15h 35mAir Canada

Tue 9/236:00 amLHR - IAD

2 stops15h 22mAir Canada

Deal found 4/15

$610

Sun 4/2710:40 pmIAD - LHR

Nonstop7h 25mFinnair

Tue 5/65:00 pmLHR - IAD

Nonstop8h 05mFinnair

Deal found 4/15

$612

Last-minute flights from Dulles Intl to London
Discover last-minute flight deals from Dulles Intl to London. Data last updated April 15, 2025 and is based on user searches.

Mon 4/218:17 amIAD - LHR

1 stop17h 13mAir Canada

Mon 4/285:10 pmLHR - IAD

1 stop28h 05mAir Canada

Deal found 4/14

$597

Tue 4/222:40 pmIAD - LHR

2 stops14h 20mMultiple Airlines

Tue 4/298:45 amLHR - IAD

1 stop12h 30mMultiple Airlines

Deal found 4/14

$599

Tue 4/225:20 pmIAD - LHR

1 stop9h 40mAer Lingus

Wed 5/1412:00 pmLHR - IAD

1 stop12h 30mAer Lingus

Deal found 4/14

$609

Tue 4/225:50 pmIAD - LHR

Nonstop7h 30mDelta

Fri 5/26:15 amLHR - IAD

1 stop18h 00mDelta

Deal found 4/13

$612

Tue 4/228:30 pmIAD - LGW

1 stop13h 10mIcelandair

Tue 4/293:40 pmLGW - IAD

1 stop32h 40mIcelandair

Deal found 4/15

$618

Tue 4/228:30 pmIAD - LGW

2 stops18h 40mMultiple Airlines

Wed 5/72:00 pmLGW - IAD

1 stop31h 36mMultiple Airlines

Deal found 4/13

$638

Tue 4/228:45 pmIAD - LGW

1 stop16h 05mSWISS

Wed 5/146:35 pmLGW - IAD

1 stop26h 40mSWISS

Deal found 4/14

$642

Wed 4/238:45 pmIAD - LHR

1 stop33h 40mSWISS

Mon 5/125:10 pmLHR - IAD

1 stop28h 05mSWISS

Deal found 4/15

$623

Wed 4/238:45 pmIAD - LCY

1 stop15h 30mSWISS

Mon 4/286:05 pmLCY - IAD

1 stop27h 10mSWISS

Deal found 4/15

$636

Thu 4/245:50 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Wed 4/3012:35 pmLHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 4/15

$628

Thu 4/248:30 pmIAD - STN

2 stops15h 55mMultiple Airlines

Sun 4/277:00 amSTN - IAD

2 stops17h 20mMultiple Airlines

Deal found 4/14

$634

Fri 4/2510:40 pmIAD - LHR

Nonstop7h 25mIberia

Wed 5/75:00 pmLHR - IAD

Nonstop8h 05mIberia

Deal found 4/14

$636

One-way flights from Dulles Intl to London
Search for one-way flight options from Dulles Intl to London. Find affordable one-way fares based on user searches. Data last updated April 15, 2025.

Mon 7/2110:20 pmIAD - LHR

1 stop14h 25mTAP AIR PORTUGAL

Deal found 4/15

$243

Mon 5/128:30 pmIAD - LGW

1 stop13h 05mIcelandair

Deal found 4/14

$248

Sun 7/61:29 pmIAD - LGW

1 stop15h 41mMultiple Airlines

Deal found 4/14

$252

Tue 9/238:30 pmIAD - LHR

1 stop10h 25mIcelandair

Deal found 4/15

$258

Sun 5/2511:35 amIAD - STN

2 stops41h 40mMultiple Airlines

Deal found 4/15

$273

Mon 6/211:35 amIAD - LTN

2 stops28h 25mMultiple Airlines

Deal found 4/14

$285

Mon 7/1410:20 pmIAD - LGW

1 stop30h 25mTAP AIR PORTUGAL

Deal found 4/15

$288

Sun 7/201:29 pmIAD - LHR

2 stops25h 51mMultiple Airlines

Deal found 4/15

$296

Mon 6/211:35 amIAD - LCY

2 stops22h 15mMultiple Airlines

Deal found 4/14

$354

Tue 7/810:20 pmIAD - SEN

3 stops19h 45mMultiple Airlines

Deal found 4/14

$359

Tue 4/225:50 pmIAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 4/15

$364

Tue 4/2910:05 pmIAD - LHR

1 stop15h 25mScandinavian Airlines

Deal found 4/15

$368

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 5/3

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

Tue 5/13

3:40 pm-7:20 pm

1 stop32h 40m

$522

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 5/3

8:30 pm-8:20 pm

1 stop18h 50m

London Heathrow

Tue 5/13

9:25 pm-7:20 pm

1 stop26h 55m

$530

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 5/5

10:20 pm-3:35 pm

1 stop12h 15m

London Gatwick

Wed 5/7

4:25 pm-3:20 pm

1 stop27h 55m

$598

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 5/12

8:30 pm-11:45 am

1 stop10h 15m

London Gatwick

Wed 5/21

10:00 am-2:53 pm

1 stop33h 53m

$600

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 4/30

6:30 pm-6:55 am

Nonstop7h 25m

London Heathrow

Wed 5/7

8:40 am-4:15 pm

1 stop12h 35m

$601

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Tue 5/6

8:45 pm-5:50 pm

1 stop16h 05m

London Gatwick

Tue 5/13

6:35 pm-4:15 pm

1 stop26h 40m

$605

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 5/13

10:25 am-10:00 am

2 stops18h 35m

London Heathrow

Thu 5/22

6:00 am-2:35 pm

1 stop13h 35m

$605

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 4/27

2:12 pm-7:40 am

1 stop12h 28m

London Heathrow

Tue 5/13

6:10 am-3:00 pm

1 stop13h 50m

$606

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 9/19

10:40 pm-11:05 am

Nonstop7h 25m

London Heathrow

Tue 10/7

6:10 am-3:00 pm

1 stop13h 50m

$607

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 9/9

9:55 am-6:30 am

1 stop15h 35m

London Heathrow

Tue 9/23

6:00 am-4:22 pm

2 stops15h 22m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 60 results

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Compare providers for flights from Dulles Intl to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to London in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
Flightnetwork	Price Accuracy2 stars	Trust Score*3 stars
Gurufare	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-London flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-London flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-London flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-London flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

Airports

IAD

For evening departures, expect crowded check-in areas at IAD. Arrive early to navigate the busy terminals efficiently.

LHR

Take the Heathrow Express for the fastest route to central London from LHR, reaching Paddington Station quickly.

Our travel experts

Ramsey Qubein

Expert on LHR and IAD

Best time to book a flight from Dulles Intl to London

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

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London, you should look to book at least 85 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 Washington, D.C. Dulles Intl Airport to London?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $661). Flying from Washington, D.C. Dulles Intl Airport to London 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 IAD to LON?

When flying from Washington, D.C. Dulles Intl Airport to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 19% versus a flight at noon.

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

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

Weekly flight availability from Washington, D.C. Dulles Intl Airport to London

The most flights from IAD to LON are scheduled on a Monday (25 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (21 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London 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 when rainfall is around 1.6 in.

Temperature in London 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 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 London

See what other customers who have flown with Delta, Porter Airlines and KLM from Washington, D.C. to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,917 reviews

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

7,917 reviews

Delta

8.0

Very good

7,917 reviews

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.

Porter Airlines

8.0

Very good

281 reviews

Delta

8.0

Very good

7,917 reviews

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

1,323 reviews

Delta

8.0

Very good

7,917 reviews

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

1,269 reviews

Delta

8.0

Very good

7,917 reviews

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

7.5

Good

1,435 reviews

Delta

8.0

Very good

7,917 reviews

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

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to London round-trip?
According to our current data, Icelandair ($513), Iberia ($565), and Virgin Atlantic ($588) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to London. Icelandair is priced at 30% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to London one-way?
The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $243. However, be on the lookout for offers from Icelandair and Virgin Atlantic, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to London for a low price.
What are the most popular routes from Washington, D.C. Dulles Intl Airport to London?
When deciding which route to take from Washington, D.C. Dulles Intl Airport to London consider Washington, D.C. Dulles Intl - London Heathrow, Washington, D.C. Dulles Intl - London Gatwick or Washington, D.C. Dulles Intl - London City as they are the most popular.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport to London on time: Delta (94%), Singapore Airlines (92%), Virgin Atlantic (92%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to London?
While on average a flight from Washington, D.C. Dulles Intl Airport to London is generally $2,453, our data shows the cheapest flight currently is $399. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $483 for that flight.
Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London?
Of the flights from Washington, D.C. Dulles Intl Airport to London that have layovers, most of them stop in Reykjavik.
What are some popular things to do or see while on a layover in Reykjavik?
Reykjavik travelers tend to visit Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool more than anywhere else. Hallgrímskirkja, Harpa and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl if you are interested in checking them out. Those landing in Reykjavik looking to spend some time exploring during their layover can rent a car for about $49 per day.
Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London flights?
The least popular layover on flights from Washington, D.C. Dulles Intl Airport to London is Dublin.
Can I find deals for flights from Dulles Intl to London that include hotel bookings?
Yes. In addition to deals on Dulles Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to London.
Can I find deals for business class flights from Dulles Intl to London?
Yes. Cheapflights offers flight deals from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to London?
Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London (average of $661). Flying from Washington, D.C. Dulles Intl Airport to London 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.

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Top 10 airlines flying from Dulles Intl to London

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest$369	Average$518	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$370	Average$598	FlexibilityNo cancel fee	On-time77%
Icelandair	Cheapest$477	Average$650	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$486	Average$759	FlexibilityNo cancel fee	On-timeN/A
Aer Lingus	Cheapest$507	Average$702	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$549	Average$803	FlexibilityNo cancel fee	On-time67%
SWISS	Cheapest$572	Average$806	FlexibilityNo cancel fee	On-time79%
Finnair	Cheapest$573	Average$753	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$573	Average$832	FlexibilityNo cancel fee	On-timeN/A
Iberia	Cheapest$574	Average$692	FlexibilityNo cancel fee	On-time77%

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$243+ Cheap flights from Dulles Intl (IAD) to London (LON)

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 7/28. 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 Washington, D.C. Dulles Intl to London are usually found in January or October, booked 85 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

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Cheapest flights from Dulles Intl to LondonExplore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.

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Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

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

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

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Best time to book a flight from Dulles Intl to London

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to London. Price data was last updated on April 11, 2025.

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

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

Find hourly flight availability from Dulles Intl 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 April 15, 2025.

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

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

Weekly flight availability from Washington, D.C. Dulles Intl Airport to London

Explore weekly flight availability from Dulles Intl 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 April 15, 2025.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

See what other customers who have flown with Delta, Porter Airlines and KLM from Washington, D.C. to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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 flying from Washington, D.C. Dulles Intl Airport to London round-trip?

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

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

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

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

Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London?

What are some popular things to do or see while on a layover in Reykjavik?

Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London flights?

Can I find deals for flights from Dulles Intl to London that include hotel bookings?

How can I find direct flights from Dulles Intl to London?

Can I find deals for business class flights from Dulles Intl to London?

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

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Alternative routes for Dulles Intl to London

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Top 10 airlines flying from Dulles Intl to London

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Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 15, 2025.