How often are flights from Washington, D.C. to London delayed?

About 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 159 minutes.

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Reykjavik (KEF) – chosen by Cheapflights users on 60% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to London Heathrow Airport on Cheapflights.

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 9h 40m.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to London flights?

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 15% of flights being delayed.

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $479.

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Flights via Dublin (DUB) offer the fastest connection on this route, with an average layover time of 1h 28m.

What is the most punctual flight time for Washington, D.C. to London flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

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

The most flights from IAD to LHR are scheduled on a Monday (26 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (19 on average).

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

If weather is an important factor for your trip to London Heathrow Airport, 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).

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

Consider KLM (95%), Air France (92%) or Delta (92%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.

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

British Airways, United Airlines and Iberia are the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.

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

Most of the time, Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights that have layovers will stop in Reykjavik.

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

Flights departing from Washington, D.C. Dulles Intl Airport and landing in London Heathrow Airport layover in Dublin least frequently.

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

Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. 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. Travelers can book a car rental at Reykjavik Keflavik Intl for about $49 per day to make their sightseeing more efficient.

Most accurate provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-London Heathrow Airport flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Washington, D.C. Dulles Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-London Heathrow Airport 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 Heathrow Airport flights, Cheapflights users trust Justfly.com the most. Justfly.com 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 Heathrow Airport 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 Heathrow that include hotel bookings?

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

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

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

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

Yes. Cheapflights offers flight deals from Dulles Intl to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$379+ Flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport

Q: How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Airfare is below average for this route at the moment. Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights typically cost between $668 and $1,026 in February. The cheapest round-trip price found within the last 3 days was $574 on Scandinavian Airlines (Feb 5-Feb 12).

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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

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in August or September, booked 45 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Dulles Intl to Heathrow

Cheapest flights from Dulles Intl to Heathrow
Explore the most affordable flight options available from Dulles Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

Tue 12/307:40 pmIAD - LHR

1 stop10h 10mIcelandair

Tue 1/1312:15 pmLHR - IAD

1 stop11h 15mIcelandair

Deal found 12/22

$582

Mon 12/297:40 pmIAD - LHR

1 stop18h 50mIcelandair

Thu 1/2212:15 pmLHR - IAD

1 stop11h 15mIcelandair

Deal found 12/21

$614

Wed 12/3110:30 pmIAD - LHR

1 stop12h 00mTAP AIR PORTUGAL

Wed 1/141:40 pmLHR - IAD

1 stop30h 35mTAP AIR PORTUGAL

Deal found 12/21

$640

Mon 12/297:40 pmIAD - LHR

1 stop18h 50mIcelandair

Sun 1/118:35 pmLHR - IAD

1 stop26h 55mIcelandair

Deal found 12/21

$658

Mon 12/296:20 pmIAD - LHR

Nonstop7h 20mMultiple Airlines

Thu 1/229:00 amLHR - IAD

1 stop12h 40mMultiple Airlines

Deal found 12/21

$685

Wed 12/316:20 pmIAD - LHR

Nonstop7h 20mLufthansa

Wed 1/147:40 amLHR - IAD

1 stop12h 55mLufthansa

Deal found 12/21

$690

Wed 12/316:20 pmIAD - LHR

Nonstop7h 20mMultiple Airlines

Wed 1/146:00 amLHR - IAD

1 stop13h 40mMultiple Airlines

Deal found 12/22

$698

Thu 12/257:40 pmIAD - LHR

1 stop10h 10mIcelandair

Fri 1/1612:15 pmLHR - IAD

1 stop11h 15mIcelandair

Deal found 12/21

$701

Best flights from Dulles Intl to Heathrow
Discover carefully curated flight deals from Dulles Intl to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 23, 2025.

Thu 2/268:30 pmIAD - LHR

2 stops14h 55mScandinavian Airlines

Thu 3/510:20 amLHR - IAD

1 stop11h 55mScandinavian Airlines

Deal found 12/22

$576

Sat 2/1410:15 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Sun 3/16:50 amLHR - IAD

1 stop12h 45mUnited Airlines

Deal found 12/22

$614

Sat 1/248:30 pmIAD - LHR

2 stops17h 20mScandinavian Airlines

Tue 2/39:05 pmLHR - IAD

2 stops25h 10mScandinavian Airlines

Deal found 12/20

$583

Thu 1/296:20 pmIAD - LHR

Nonstop7h 20mUnited Airlines

Tue 2/36:50 amLHR - IAD

1 stop12h 45mUnited Airlines

Deal found 12/22

$614

Thu 2/1210:15 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Tue 2/176:50 amLHR - IAD

1 stop12h 45mUnited Airlines

Deal found 12/20

$614

Tue 1/2010:15 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Tue 1/279:00 amLHR - IAD

1 stop12h 40mUnited Airlines

Deal found 12/22

$614

Wed 1/1410:15 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Fri 1/239:00 amLHR - IAD

1 stop12h 40mUnited Airlines

Deal found 12/21

$614

Sun 1/1110:15 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Wed 2/256:35 amLHR - IAD

1 stop14h 00mUnited Airlines

Deal found 12/21

$614

Sun 2/156:20 pmIAD - LHR

Nonstop7h 20mUnited Airlines

Mon 2/236:50 amLHR - IAD

1 stop12h 45mUnited Airlines

Deal found 12/22

$614

Sat 1/246:05 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Sat 1/316:35 amLHR - IAD

1 stop14h 00mUnited Airlines

Deal found 12/22

$614

Wed 1/1410:15 pmIAD - LHR

Nonstop7h 35mUnited Airlines

Mon 1/191:45 pmLHR - IAD

1 stop31h 55mUnited Airlines

Deal found 12/21

$614

Mon 1/126:20 pmIAD - LHR

Nonstop7h 20mUnited Airlines

Thu 2/266:35 amLHR - IAD

1 stop14h 00mUnited Airlines

Deal found 12/21

$614

Last-minute flights from Dulles Intl to Heathrow
Discover last-minute flight deals from Dulles Intl to Heathrow. Data last updated December 23, 2025 and is based on user searches.

Tue 12/307:40 pmIAD - LHR

1 stop10h 10mIcelandair

Tue 1/1312:15 pmLHR - IAD

1 stop11h 15mIcelandair

Deal found 12/22

$582

Mon 1/55:31 pmIAD - LHR

1 stop12h 44mMultiple Airlines

Tue 1/136:00 amLHR - IAD

1 stop14h 30mMultiple Airlines

Deal found 12/21

$587

Mon 1/128:30 pmIAD - LHR

2 stops19h 50mScandinavian Airlines

Sun 1/187:30 pmLHR - IAD

1 stop24h 50mScandinavian Airlines

Deal found 12/22

$573

Mon 1/128:30 pmIAD - LHR

2 stops14h 55mScandinavian Airlines

Wed 1/216:40 amLHR - IAD

2 stops15h 35mScandinavian Airlines

Deal found 12/22

$575

Mon 1/128:30 pmIAD - LHR

1 stop14h 30mScandinavian Airlines

Fri 1/307:50 pmLHR - IAD

2 stops28h 00mScandinavian Airlines

Deal found 12/21

$581

Mon 1/128:30 pmIAD - LHR

2 stops14h 55mScandinavian Airlines

Sat 1/176:40 amLHR - IAD

2 stops17h 10mScandinavian Airlines

Deal found 12/21

$583

Sat 1/178:30 pmIAD - LHR

2 stops20h 05mScandinavian Airlines

Fri 1/236:40 pmLHR - IAD

1 stop29h 10mScandinavian Airlines

Deal found 12/23

$579

Wed 1/218:30 pmIAD - LHR

2 stops14h 55mScandinavian Airlines

Sat 2/2110:20 amLHR - IAD

1 stop13h 30mScandinavian Airlines

Deal found 12/22

$585

Mon 1/264:50 pmIAD - LHR

1 stop11h 30mScandinavian Airlines

Tue 5/123:35 pmLHR - IAD

2 stops30h 15mScandinavian Airlines

Deal found 12/21

$578

Wed 1/287:40 pmIAD - LHR

1 stop10h 10mIcelandair

Sun 2/112:15 pmLHR - IAD

1 stop11h 15mIcelandair

Deal found 12/22

$577

Thu 1/298:30 pmIAD - LHR

1 stop14h 30mScandinavian Airlines

Sun 2/17:50 pmLHR - IAD

2 stops26h 25mScandinavian Airlines

Deal found 12/23

$584

One-way flights from Dulles Intl to Heathrow
Search for one-way flight options from Dulles Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated December 23, 2025.

Tue 1/279:45 amIAD - LHR

1 stop16h 25mAir Canada

Deal found 12/22

$379

Thu 1/299:00 amIAD - LHR

2 stops17h 10mAir Canada

Deal found 12/22

$380

Wed 1/286:20 pmIAD - LHR

Nonstop7h 10mBritish Airways

Deal found 12/22

$381

Mon 2/26:20 pmIAD - LHR

Nonstop7h 10mBritish Airways

Deal found 12/22

$382

Thu 1/2212:23 pmIAD - LHR

2 stops22h 37mScandinavian Airlines

Deal found 12/22

$383

Tue 1/2710:15 pmIAD - LHR

Nonstop7h 35mAustrian Airlines

Deal found 12/22

$384

Wed 1/76:10 pmIAD - LHR

2 stops13h 50mSWISS

Deal found 12/22

$385

Wed 2/115:20 pmIAD - LHR

2 stops22h 40mLufthansa

Deal found 12/21

$386

Mon 1/55:31 pmIAD - LHR

1 stop12h 44mAustrian Airlines

Deal found 12/21

$387

Wed 1/141:15 pmIAD - LHR

2 stops15h 05mAir Canada

Deal found 12/23

$388

Tue 2/241:02 pmIAD - LHR

1 stop11h 53mUnited Airlines

Deal found 12/22

$389

Sat 2/215:30 pmIAD - LHR

3 stops19h 20mMultiple Airlines

Deal found 12/20

$390

Find flight deals from Dulles Intl to Heathrow

Most accurate provider	Justfly.com 3 stars
Most trusted provider	Justfly.com 3 stars
Round-trip from	$574 (Mytrip)
One-way from	$379 (Flightnetwork)
Popular in	June
Cheapest in	August
Average price	$871
Good round-trip deal	$674 or less
Good one-way deal	$435 or less

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

Search Deals

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

Search Deals

From Washington, D.C. Dulles Intl to London Heathrow

Search Deals

One-way flight from Washington, D.C. Dulles Intl to London Heathrow

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 ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 2/26

8:30 pm-4:25 pm

2 stops14h 55m

London Heathrow

Thu 3/5

10:20 am-5:15 pm

1 stop11h 55m

$576

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 1/24

8:30 pm-6:50 pm

2 stops17h 20m

London Heathrow

Tue 2/3

9:05 pm-5:15 pm

2 stops25h 10m

$583

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 2/14

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Sun 3/1

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 1/29

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Tue 2/3

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 2/12

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Tue 2/17

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 1/20

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Tue 1/27

9:00 am-4:40 pm

1 stop12h 40m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 1/14

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Fri 1/23

9:00 am-4:40 pm

1 stop12h 40m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 1/11

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Wed 2/25

6:35 am-3:35 pm

1 stop14h 00m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 2/15

6:20 pm-6:40 am

Nonstop7h 20m

London Heathrow

Mon 2/23

6:50 am-2:35 pm

1 stop12h 45m

$614

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 1/24

6:05 pm-6:40 am

Nonstop7h 35m

London Heathrow

Sat 1/31

6:35 am-3:35 pm

1 stop14h 00m

$614

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 24 results

Compare providers for flights from Dulles Intl to Heathrow

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

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
Gotogate	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust Score*2 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star
oojo	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 Heathrow Airport flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Washington, D.C. Dulles Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-London Heathrow Airport 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 Heathrow Airport flights, Cheapflights users trust Justfly.com the most. Justfly.com 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 Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

Prices

Airlines

Delays

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, you should look to book at least 45 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 Heathrow Airport?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $436). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $746). 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 LHR?

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in the morning. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at noon.

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

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

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

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

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

Airports

IAD

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

LHR

Take the Heathrow Express for the fastest route to central London. It connects to Paddington Station, offering further transit options.

Our travel experts

Ramsey Qubein

Expert on LHR and IAD

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, such as Virgin Atlantic, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Virgin Atlantic

7.5

Good

677 reviews

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Virgin Atlantic

7.5

Good

677 reviews

Virgin Atlantic

7.5

Good

677 reviews

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

United Airlines

7.4

Good

9,105 reviews

Virgin Atlantic

7.5

Good

677 reviews

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

American Airlines

7.2

Good

11,054 reviews

Virgin Atlantic

7.5

Good

677 reviews

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Iberia

7.0

Good

3,056 reviews

Virgin Atlantic

7.5

Good

677 reviews

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

7,605 reviews

Virgin Atlantic

7.5

Good

677 reviews

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Related info for your journey

How long is the flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in 7h 35m. Fly via Scandinavian Airlines or United Airlines to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and London Heathrow Airport is about 3664 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport round-trip?
TAP AIR PORTUGAL, at $395, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.Alternate airlines to your destination round-trip include Icelandair and Scandinavian Airlines. TAP AIR PORTUGAL is priced at 47% 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 Heathrow Airport one-way?
One-way options have recently been found by users for as low as $191 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $213 and TAP AIR PORTUGAL from $222 one-way.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Consider KLM (95%), Air France (92%) or Delta (92%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
On average you can expect to pay $2,116 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is $350 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at $417.
Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Most of the time, Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights that have layovers will stop in Reykjavik.
What are some popular things to do or see while on a layover in Reykjavik?
Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. 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. Travelers can book a car rental at Reykjavik Keflavik Intl for about $49 per day to make their sightseeing more efficient.
Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights?
Flights departing from Washington, D.C. Dulles Intl Airport and landing in London Heathrow Airport layover in Dublin least frequently.
Can I find deals for flights from Dulles Intl to Heathrow that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Heathrow.
Can I find deals for business class flights from Dulles Intl to Heathrow?
Yes. Cheapflights offers flight deals from Dulles Intl to Heathrow 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 Heathrow Airport?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of $436). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $746). 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 Heathrow

Airline	Cheapest	Average	Flexibility	On-time
TAP AIR PORTUGAL	Cheapest$395	Average$566	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$429	Average$577	FlexibilityNo cancel fee	On-time76%
Scandinavian Airlines	Cheapest$429	Average$593	FlexibilityNo cancel fee	On-time77%
Lufthansa	Cheapest$447	Average$1,061	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$530	Average$808	FlexibilityNo cancel fee	On-timeN/A
British Airways	Cheapest$543	Average$771	FlexibilityNo cancel fee	On-time70%
Aer Lingus	Cheapest$558	Average$750	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$560	Average$784	FlexibilityNo cancel fee	On-time72%
United Airlines	Cheapest$564	Average$805	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$573	Average$797	FlexibilityNo cancel fee	On-time71%

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$379+ Cheap flights from Dulles Intl (IAD) to Heathrow (LHR)

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 1/27. 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 Heathrow are usually found in August or September, booked 45 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Dulles Intl to Heathrow

Cheapest flights from Dulles Intl to HeathrowExplore the most affordable flight options available from Dulles Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

Explore the most affordable flight options available from Dulles Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

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Best time to book a flight from Dulles Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

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

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

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

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

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

How often are flights from Washington, D.C. to London delayed?

What is the most punctual flight time for Washington, D.C. to London flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on Washington, D.C. to London flights?

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

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

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

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Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

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

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

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

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

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

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 Heathrow Airport flights?

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

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

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

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

Traveling to a place near London Heathrow Airport?

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Alternative routes for Dulles Intl to Heathrow

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Top 10 airlines flying from Dulles Intl to Heathrow

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Cheapest flights from Dulles Intl to Heathrow
Explore the most affordable flight options available from Dulles Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.