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

Flights via Brussels (BRU) have the shortest average one-way travel time for one-stop routes: 11h 40m.

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

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average stopover time of 1h 13m.

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

Dublin (DUB) – chosen by Cheapflights users on 34% of one-stop itineraries from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.

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

Zurich (ZRH) is the most affordable one-stop option, with an average return flight price of £451.

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

The most flights from LHR to IAD 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 (17 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

Consider KLM (85%), Air France (85%) or Delta (85%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

Of the flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport that have stopovers, the fewest flights stop in Reykjavik.

What are some popular things to do or see while on a stopover in Dublin?

Dublin travellers tend to visit Bord Gáis Energy Theatre, 3Olympia Theatre, and Royal Dublin Society more than anywhere else. Bord Gáis Energy Theatre, 3Olympia Theatre, and Royal Dublin Society are located about 5.7 mi, 5.7 mi, and 6.9 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £30.

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

Saturday flights are found to be more expensive to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

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

The best pricing can be found in the month of February. Prices to Washington, D.C. Dulles Intl Airport from London Heathrow Airport average £541. You can even find prices in February for less than £541, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as £225. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from London Heathrow Airport. Flying in the targeted month can save you up to 19%.

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

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

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

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

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

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

£374+ Cheap Flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or March, booked 75 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to Dulles Intl

Round-trip from	£392
One-way from	£374
Popular in	July
Cheapest in	February
Average price	£528
Good round-trip deal	£482 or less
Good one-way deal	£545 or less

Air Canada
26/9-4/10
2 total stops
49h 23m total
London to Washington, D.C.

Search Deals

Aer Lingus
22/9
1 total stop
23h 40m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£8 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 London Heathrow to Washington, D.C. Dulles Intl.

Search Deals

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

Search Deals

Find flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Fri 26/906:55LHR - IAD

1 stop17h 30mMultiple Airlines

Sat 4/1017:37IAD - LHR

1 stop31h 53mMultiple Airlines

Deal found 9/9£392

Tue 28/1009:00LHR - IAD

1 stop12h 40mUnited Airlines

Tue 11/1117:33IAD - LHR

1 stop10h 37mUnited Airlines

Deal found 10/9£394

Thu 13/1108:40LHR - IAD

2 stops19h 23mVirgin Atlantic

Thu 18/1210:08IAD - LHR

1 stop15h 17mVirgin Atlantic

Deal found 10/9£394

Thu 2/1006:00LHR - IAD

1 stop13h 35mAustrian Airlines

Sun 5/1022:25IAD - LHR

Nonstop7h 15mAustrian Airlines

Deal found 12/9£395

Wed 29/1006:35LHR - IAD

1 stop18h 30mUnited Airlines

Mon 17/1118:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 10/9£396

Thu 2/1009:30LHR - IAD

1 stop11h 20mUnited Airlines

Tue 7/1013:00IAD - LHR

1 stop12h 30mUnited Airlines

Deal found 9/9£396

Mon 24/1108:30LHR - IAD

1 stop12h 20mUnited Airlines

Tue 2/1222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 11/9£397

Sun 21/906:30LHR - IAD

1 stop13h 45mUnited Airlines

Sun 19/1022:25IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 10/9£398

Sat 20/907:45LHR - IAD

1 stop10h 45mUnited Airlines

Mon 13/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 10/9£399

Tue 28/1009:00LHR - IAD

1 stop12h 40mMultiple Airlines

Tue 11/1118:00IAD - LHR

1 stop10h 45mMultiple Airlines

Deal found 10/9£399

Fri 21/1106:50LHR - IAD

2 stops14h 31mMultiple Airlines

Tue 25/1113:20IAD - LHR

2 stops13h 45mMultiple Airlines

Deal found 12/9£400

Fri 14/1116:25LHR - IAD

Nonstop8h 30mBritish Airways

Fri 28/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 10/9£401

Best flights from Heathrow to Dulles Intl
Discover carefully curated flight deals from Heathrow to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2025.

Tue 3/209:00LHR - IAD

1 stop12h 40mMultiple Airlines

Thu 12/218:20IAD - LHR

Nonstop7h 20mMultiple Airlines

Deal found 10/9£394

Thu 27/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Sun 7/1212:55IAD - LHR

2 stops13h 15mUnited Airlines

Deal found 10/9£394

Fri 26/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Sat 4/1006:15IAD - LHR

2 stops19h 15mUnited Airlines

Deal found 9/9£394

Thu 8/109:00LHR - IAD

1 stop12h 40mMultiple Airlines

Wed 14/122:15IAD - LHR

Nonstop7h 35mMultiple Airlines

Deal found 10/9£394

Fri 6/209:00LHR - IAD

1 stop12h 40mUnited Airlines

Thu 12/218:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 10/9£394

Tue 27/109:00LHR - IAD

1 stop12h 40mUnited Airlines

Tue 3/209:00IAD - LHR

2 stops17h 10mUnited Airlines

Deal found 9/9£394

Tue 11/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Tue 18/1106:00IAD - LHR

2 stops20h 10mUnited Airlines

Deal found 10/9£394

Thu 20/1109:00LHR - IAD

1 stop12h 40mUnited Airlines

Thu 4/1208:20IAD - LHR

2 stops17h 50mUnited Airlines

Deal found 10/9£394

Fri 6/209:00LHR - IAD

1 stop12h 40mUnited Airlines

Sun 8/222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 10/9£394

Thu 5/209:00LHR - IAD

1 stop12h 40mUnited Airlines

Thu 19/206:00IAD - LHR

2 stops20h 10mUnited Airlines

Deal found 10/9£394

Sun 1/209:00LHR - IAD

1 stop12h 40mUnited Airlines

Sat 14/218:20IAD - LHR

Nonstop7h 20mUnited Airlines

Deal found 10/9£394

Fri 6/209:00LHR - IAD

1 stop12h 40mUnited Airlines

Wed 11/222:15IAD - LHR

Nonstop7h 35mUnited Airlines

Deal found 10/9£394

Direct flights from Heathrow to Dulles Intl
Explore direct flight options from Heathrow to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 September 2025.

Wed 19/1112:10LHR - IAD

Nonstop8h 25mBritish Airways

Thu 27/1121:45IAD - LHR

Nonstop7h 15mBritish Airways

Deal found 11/9£397

Fri 21/1116:25LHR - IAD

Nonstop8h 30mBritish Airways

Thu 11/1221:45IAD - LHR

Nonstop7h 15mBritish Airways

Deal found 11/9£400

Fri 14/1116:25LHR - IAD

Nonstop8h 30mBritish Airways

Fri 28/1118:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 10/9£401

Thu 2/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Thu 16/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/9£402

Thu 25/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Tue 7/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 11/9£403

Thu 2/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Mon 6/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 11/9£404

Wed 8/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Fri 17/1018:45IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 10/9£405

Thu 20/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Sun 30/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 11/9£410

Fri 26/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Sat 4/1017:50IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 9/9£410

Fri 19/914:25LHR - IAD

Nonstop8h 05mBritish Airways

Thu 25/922:40IAD - LHR

Nonstop7h 25mBritish Airways

Deal found 12/9£411

Tue 25/1112:10LHR - IAD

Nonstop8h 25mBritish Airways

Sun 30/1121:45IAD - LHR

Nonstop7h 15mBritish Airways

Deal found 12/9£412

Sun 9/1116:20LHR - IAD

Nonstop8h 55mLufthansa

Thu 20/1118:20IAD - LHR

Nonstop7h 20mLufthansa

Deal found 11/9£413

Last-minute flights from Heathrow to Dulles Intl
Discover last-minute flight deals from Heathrow to Dulles Intl. Data last updated 12 September 2025 and is based on user searches.

Wed 17/914:25LHR - IAD

Nonstop8h 05mBritish Airways

Wed 24/917:50IAD - LHR

Nonstop7h 25mBritish Airways

Deal found 10/9£401

Thu 18/908:40LHR - IAD

1 stop12h 35mUnited Airlines

Mon 13/1022:25IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 10/9£394

Thu 18/909:55LHR - IAD

2 stops16h 44mVirgin Atlantic

Thu 16/1019:59IAD - LHR

1 stop33h 01mVirgin Atlantic

Deal found 10/9£394

Thu 18/906:00LHR - IAD

1 stop13h 35mAustrian Airlines

Wed 24/918:40IAD - LHR

Nonstop7h 15mAustrian Airlines

Deal found 11/9£395

Thu 18/906:55LHR - IAD

1 stop17h 30mLufthansa

Fri 26/918:40IAD - LHR

Nonstop7h 15mLufthansa

Deal found 10/9£396

Thu 18/909:30LHR - IAD

1 stop11h 20mUnited Airlines

Mon 22/918:40IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 10/9£397

Thu 18/907:45LHR - IAD

1 stop10h 45mBrussels Airlines

Sun 2/1115:59IAD - LHR

1 stop36h 41mBrussels Airlines

Deal found 10/9£403

Fri 19/917:00LHR - IAD

Nonstop8h 10mBritish Airways

Thu 25/917:50IAD - LHR

Nonstop7h 25mBritish Airways

Deal found 11/9£400

Fri 19/907:45LHR - IAD

1 stop11h 40mUnited Airlines

Mon 22/917:53IAD - LHR

1 stop10h 27mUnited Airlines

Deal found 11/9£402

Sat 20/907:45LHR - IAD

1 stop10h 45mUnited Airlines

Wed 15/1006:15IAD - LHR

1 stop9h 25mUnited Airlines

Deal found 10/9£399

Sun 21/906:30LHR - IAD

1 stop13h 45mUnited Airlines

Sun 19/1022:25IAD - LHR

Nonstop7h 15mUnited Airlines

Deal found 10/9£398

One-way flights from Heathrow to Dulles Intl
Search for one-way flight options from Heathrow to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 12 September 2025.

Mon 22/921:10LHR - IAD

1 stop23h 40mAer Lingus

Deal found 11/9£374

Sat 4/1020:00LHR - IAD

2 stops24h 20mMultiple Airlines

Deal found 11/9£375

Fri 3/1015:05LHR - IAD

3 stops47h 12mMultiple Airlines

Deal found 10/9£377

Sun 5/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 9/9£378

Sun 21/912:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Deal found 10/9£379

Wed 17/921:05LHR - IAD

3 stops28h 45mMultiple Airlines

Deal found 11/9£379

Fri 19/914:10LHR - IAD

1 stop15h 22mUnited Airlines

Deal found 9/9£380

Thu 11/1212:15LHR - IAD

1 stop11h 15mIcelandair

Deal found 12/9£381

Fri 10/1012:00LHR - IAD

1 stop13h 50mTAP AIR PORTUGAL

Deal found 10/9£382

Fri 3/1008:40LHR - IAD

1 stop12h 35mSWISS

Deal found 12/9£383

Thu 25/908:40LHR - IAD

1 stop12h 35mSWISS

Deal found 11/9£384

Mon 6/1008:00LHR - IAD

1 stop17h 50mTAP AIR PORTUGAL

Deal found 10/9£385

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 3/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 12/2

18:20-06:40

Nonstop7h 20m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 27/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Sun 7/12

12:55-07:10

2 stops13h 15m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 26/9

08:40-16:15

1 stop12h 35m

Washington, D.C. Dulles Intl

Sat 4/10

06:15-06:30

2 stops19h 15m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 8/1

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Wed 14/1

22:15-10:50

Nonstop7h 35m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 6/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 12/2

18:20-06:40

Nonstop7h 20m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 27/1

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Tue 3/2

09:00-07:10

2 stops17h 10m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 11/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Tue 18/11

06:00-07:10

2 stops20h 10m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 20/11

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 4/12

08:20-07:10

2 stops17h 50m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 6/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Sun 8/2

22:15-10:50

Nonstop7h 35m

£394

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 5/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 19/2

06:00-07:10

2 stops20h 10m

£394

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 23 results

Best time to book a flight from Heathrow to Dulles Intl

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

Prices

Airlines

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

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, you should look to book at least 75 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 LHR to IAD?

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the afternoon.

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

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

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown with Virgin Atlantic, Aer Lingus, andIcelandair from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Virgin Atlantic

7.4

Good

664 reviews

Check prices

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

7.4

Good

664 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Aer Lingus

7.2

Good

1,271 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Icelandair

7.0

Good

546 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Lufthansa

6.8

Okay

7,409 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

7,361 reviews

Virgin Atlantic

7.4

Good

664 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Related info for your journey

How long is the flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Airlines like United Airlines fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in about 12h 40m. The time it takes to get you to your destination can typically vary by up to . There are 3664 mi between London Heathrow Airport and Washington, D.C. Dulles Intl Airport.
What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at £187, Delta will fly you from London Heathrow Airport to Washington, D.C. Dulles Intl Airport and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from PLAY and TAP AIR PORTUGAL - these airlines can fly you to your destination from £243 and £350, respectively. Delta is currently priced 68% below the average price you’ll pay for this route.
What are the most reliable airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Consider KLM (85%), Air France (85%) or Delta (85%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.
What are the cheapest flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
On average you can expect to pay £1,282 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £412 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £317.
Where are the most common stopover locations when flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Flights departing from London Heathrow Airport and landing in Washington, D.C. Dulles Intl Airport stopover in Dublin most frequently.
What are some popular things to do or see while on a stopover in Dublin?
Dublin travellers tend to visit Bord Gáis Energy Theatre, 3Olympia Theatre, and Royal Dublin Society more than anywhere else. Bord Gáis Energy Theatre, 3Olympia Theatre, and Royal Dublin Society are located about 5.7 mi, 5.7 mi, and 6.9 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £30.
Where are the least popular stopover locations for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights?
Of the flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport that have stopovers, the fewest flights stop in Reykjavik.
Can I find deals for flights from Heathrow to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Heathrow to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Dulles Intl.
Can I find deals for business class flights from Heathrow to Dulles Intl?
Yes. Cheapflights offers flight deals from Heathrow to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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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Silver Spring

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Top 10 airlines flying from Heathrow to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£187	Average£529	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£243	Average£391	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	Cheapest£350	Average£504	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£370	Average£493	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Aer Lingus	Cheapest£400	Average£575	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£428	Average£633	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£430	Average£599	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£434	Average£598	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£434	Average£575	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Air France	Cheapest£435	Average£582	FlexibilityNo cancel fee	On-time77%	Search Air France flights

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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £374

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or March, booked 75 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

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Find flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles IntlExplore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

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

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

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

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

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

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

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

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

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

Reviews of airlines servicing Dulles Intl

Related info for your journey

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

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

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

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

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

What are some popular things to do or see while on a stopover in Dublin?

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

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

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

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

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

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Fly from Heathrow to Dulles Intl on these airlines

Choose from the following airlines for your flight from Heathrow to Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2025.

Top 10 airlines flying from Heathrow to Dulles Intl

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

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

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

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

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Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.