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

Reykjavik (KEF) – chosen by Cheapflights users on 78% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to London Heathrow Airport on Cheapflights.

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

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £490.

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

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 2h 10m.

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

Flights via Brussels (BRU) have the shortest average one-way travel time for one-stop routes: 11h 15m.

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

Travellers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to London Heathrow Airport flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday evenings 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 Heathrow Airport

The most flights from IAD to LHR are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

Before booking your flight to London Heathrow Airport from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: Aeromexico (100%), KLM (80%), Air France( 80%).

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

Before booking your flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport check out the most popular airlines for this route: Air France, British Airways or Icelandair.

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 holiday 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.

£196+ Cheap Flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in October or August, booked 63 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Heathrow

Round-trip from	£358
One-way from	£196
Popular in	June
Cheapest in	October
Average price	£495
Good round-trip deal	£479 or less
Good one-way deal	£327 or less

Scandinavian Airlines
12/11-15/11
4 total stops
52h 35m total
Washington, D.C. to London

Search Deals

TAP AIR PORTUGAL
27/11
1 total stop
12h 55m total
Washington, D.C. to London

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£68 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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

Find 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 18 September 2025.

Wed 12/1120:30IAD - LHR

2 stops35h 25mScandinavian Airlines

Sat 15/1106:40LHR - IAD

2 stops17h 10mScandinavian Airlines

Deal found 16/9£358

Sun 28/923:15IAD - LHR

1 stop31h 40mIcelandair

Tue 7/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 16/9£358

Sun 5/1023:15IAD - LHR

1 stop16h 05mIcelandair

Tue 14/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£359

Wed 1/1020:30IAD - LHR

1 stop10h 25mIcelandair

Fri 31/1020:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£361

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 7/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£363

Mon 6/1020:30IAD - LHR

1 stop10h 25mIcelandair

Wed 15/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 16/9£364

Mon 10/1119:40IAD - LHR

1 stop10h 10mIcelandair

Fri 14/1112:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 16/9£365

Wed 12/1119:40IAD - LHR

1 stop18h 50mIcelandair

Thu 20/1120:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£366

Sat 11/1020:30IAD - LHR

1 stop10h 25mIcelandair

Wed 15/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 15/9£366

Fri 24/1020:30IAD - LHR

1 stop10h 25mIcelandair

Mon 3/1120:35LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£368

Fri 10/1023:15IAD - LHR

1 stop31h 40mIcelandair

Tue 21/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£369

Best flights from Dulles Intl to Heathrow
Discover carefully curated flight deals from Dulles Intl to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2025.

Fri 14/1119:40IAD - LHR

1 stop10h 10mIcelandair

Wed 26/1112:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 15/9£382

Tue 17/212:30IAD - LHR

2 stops22h 30mScandinavian Airlines

Tue 24/219:50LHR - IAD

2 stops26h 25mScandinavian Airlines

Deal found 16/9£394

Sun 25/118:20IAD - LHR

Nonstop7h 20mUnited Airlines

Mon 2/213:45LHR - IAD

1 stop31h 55mUnited Airlines

Deal found 15/9£417

Wed 1/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Fri 31/1008:55LHR - IAD

1 stop12h 40mVirgin Atlantic

Deal found 16/9£425

Tue 14/1020:30IAD - LHR

1 stop10h 25mIcelandair

Fri 5/1212:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 16/9£383

Wed 14/112:30IAD - LHR

2 stops22h 30mScandinavian Airlines

Tue 20/119:30LHR - IAD

1 stop26h 45mScandinavian Airlines

Deal found 15/9£400

Sun 23/1118:20IAD - LHR

Nonstop7h 20mUnited Airlines

Tue 2/1214:50LHR - IAD

1 stop28h 50mUnited Airlines

Deal found 16/9£419

Sun 12/1020:30IAD - LHR

1 stop18h 50mIcelandair

Sat 6/1212:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 16/9£401

Fri 13/212:30IAD - LHR

2 stops22h 30mScandinavian Airlines

Mon 16/210:20LHR - IAD

1 stop11h 55mScandinavian Airlines

Deal found 16/9£421

Wed 5/1108:45IAD - LHR

2 stops17h 25mUnited Airlines

Thu 13/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Deal found 16/9£421

Thu 1/119:40IAD - LHR

1 stop18h 50mIcelandair

Thu 15/112:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 14/9£418

Wed 4/212:30IAD - LHR

2 stops15h 50mScandinavian Airlines

Mon 9/206:40LHR - IAD

1 stop15h 35mScandinavian Airlines

Deal found 16/9£421

Direct flights from Dulles Intl to Heathrow
Explore direct flight options from Dulles Intl to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 September 2025.

Sun 28/917:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 7/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 16/9£398

Wed 15/1018:40IAD - LHR

Nonstop7h 15mLufthansa

Tue 21/1012:15LHR - IAD

Nonstop8h 15mLufthansa

Deal found 15/9£404

Sun 28/922:25IAD - LHR

Nonstop7h 15mUnited Airlines

Tue 7/1012:15LHR - IAD

Nonstop8h 15mUnited Airlines

Deal found 16/9£412

Tue 14/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 21/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 16/9£413

Sun 28/917:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Tue 14/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 17/9£419

Last-minute flights from Dulles Intl to Heathrow
Discover last-minute flight deals from Dulles Intl to Heathrow. Data last updated 18 September 2025 and is based on user searches.

Mon 22/917:45IAD - LHR

1 stop14h 00mTAP AIR PORTUGAL

Thu 11/1206:00LHR - IAD

1 stop14h 15mTAP AIR PORTUGAL

Deal found 16/9£375

Mon 22/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 30/921:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 15/9£401

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 7/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 16/9£363

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Thu 9/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 15/9£369

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Tue 30/921:25LHR - IAD

1 stop29h 45mIcelandair

Deal found 15/9£372

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Fri 10/1013:05LHR - IAD

1 stop14h 05mIcelandair

Deal found 15/9£388

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Sat 4/1013:05LHR - IAD

1 stop11h 15mIcelandair

Deal found 17/9£388

Tue 23/920:30IAD - LHR

1 stop10h 25mIcelandair

Wed 8/1021:25LHR - IAD

1 stop26h 55mIcelandair

Deal found 17/9£390

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 18 September 2025.

Thu 27/1117:30IAD - LHR

1 stop12h 55mTAP AIR PORTUGAL

Deal found 15/9£196

Sat 15/1105:58IAD - LHR

3 stops28h 32mMultiple Airlines

Deal found 15/9£196

Wed 15/1009:00IAD - LHR

3 stops25h 35mMultiple Airlines

Deal found 15/9£197

Fri 7/1122:30IAD - LHR

1 stop14h 00mTAP AIR PORTUGAL

Deal found 16/9£198

Mon 24/1117:30IAD - LHR

2 stops18h 05mMultiple Airlines

Deal found 16/9£199

Fri 26/920:59IAD - LHR

3 stops29h 41mMultiple Airlines

Deal found 16/9£199

Tue 21/1017:00IAD - LHR

2 stops18h 00mMultiple Airlines

Deal found 15/9£200

Fri 17/1015:10IAD - LHR

2 stops21h 35mMultiple Airlines

Deal found 17/9£201

Sun 12/1022:20IAD - LHR

1 stop14h 25mTAP AIR PORTUGAL

Deal found 15/9£202

Wed 1/1009:15IAD - LHR

3 stops31h 45mMultiple Airlines

Deal found 17/9£202

Mon 6/1012:09IAD - LHR

2 stops21h 26mScandinavian Airlines

Deal found 15/9£204

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

Fri 14/11

19:40-10:50

1 stop10h 10m

London Heathrow

Wed 26/11

12:15-18:30

1 stop11h 15m

£382

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 14/10

20:30-11:55

1 stop10h 25m

London Heathrow

Fri 5/12

12:15-18:30

1 stop11h 15m

£383

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Tue 17/2

12:30-16:00

2 stops22h 30m

London Heathrow

Tue 24/2

19:50-17:15

2 stops26h 25m

£394

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 14/1

12:30-16:00

2 stops22h 30m

London Heathrow

Tue 20/1

19:30-17:15

1 stop26h 45m

£400

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 12/10

20:30-20:20

1 stop18h 50m

London Heathrow

Sat 6/12

12:15-18:30

1 stop11h 15m

£401

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 25/1

18:20-06:40

Nonstop7h 20m

London Heathrow

Mon 2/2

13:45-16:40

1 stop31h 55m

£417

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 1/1

19:40-19:30

1 stop18h 50m

London Heathrow

Thu 15/1

12:15-18:30

1 stop11h 15m

£418

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 23/11

18:20-06:40

Nonstop7h 20m

London Heathrow

Tue 2/12

14:50-14:40

1 stop28h 50m

£419

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 13/2

12:30-16:00

2 stops22h 30m

London Heathrow

Mon 16/2

10:20-17:15

1 stop11h 55m

£421

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 5/11

08:45-07:10

2 stops17h 25m

London Heathrow

Thu 13/11

09:00-16:40

1 stop12h 40m

£421

Flights are sorted by cheapest return flights first.

Deals found on 17/9

Showing 1-10 of 24 results

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 return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

Prices

Airlines

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

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

When flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 3% versus a flight in the morning.

Reviews of airlines servicing Heathrow

Check out reviews from past customers who have flown with United Airlines, Virgin Atlantic, andIberia from Washington, D.C. Dulles Intl Airport to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,926 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Virgin Atlantic

7.4

Good

664 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Iberia

7.0

Good

2,925 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Lufthansa

6.8

Okay

7,409 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

British Airways

6.7

Okay

7,367 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 10h 10m. Fly via Icelandair or Scandinavian Airlines to get the fastest option. Airlines will cover a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport round-trip?
Currently priced at £304, Lufthansa will fly you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £362 and £375, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport for 45% less than the average price by searching for these airlines.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Before booking your flight to London Heathrow Airport from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: Aeromexico (100%), KLM (80%), Air France( 80%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
On average you can expect to pay £629 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is £308 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at £309.
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 holiday 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £112). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Slough

Gatwick

Northampton

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Deal

Wembley

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Hayes

Watford

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Swindon

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Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from Dulles Intl to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£304	Average£515	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Icelandair	Cheapest£362	Average£512	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£375	Average£599	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£379	Average£537	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air France	Cheapest£390	Average£517	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Iberia	Cheapest£449	Average£488	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
KLM	Cheapest£452	Average£605	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£515	Average£615	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Dulles Intl to Heathrow?

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

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Heathrow?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Dulles Intl to Heathrow.

Can Cheapflights find flights from Dulles Intl to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from £196

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in October or August, booked 63 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 18 September 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 18 September 2025.

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.

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.

Cheapflights Insights

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?

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

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

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

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

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

Reviews of airlines servicing Heathrow

Related info for your journey

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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?

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

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

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Alternative routes for Dulles Intl to Heathrow

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Top 8 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 18 September 2025.