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

Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 11h 36m.

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 £459.

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.

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 (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 (87%), Air France (87%) or Delta (87%) 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 Virgin Atlantic, British Airways and Lufthansa. 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 Dublin Castle more than anywhere else. Bord Gáis Energy Theatre, 3Olympia Theatre, and Dublin Castle are located about 5.7 mi, 5.7 mi, and 5.8 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £26.

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.

£364+ 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 September or February, booked 65 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	£396
One-way from	£364
Popular in	July
Cheapest in	September
Average price	£571
Good round-trip deal	£458 or less
Good one-way deal	£461 or less

TAP AIR PORTUGAL
23/11-6/12
2 total stops
46h 10m total
London to Washington, D.C.

Search Deals

16/3
1 total stop
26h 45m total
London to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£62 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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

Enter your travel dates to find the best prices.

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 15 October 2025.

Sun 23/1118:30LHR - IAD

1 stop25h 45mTAP AIR PORTUGAL

Sat 6/1217:30IAD - LHR

1 stop20h 25mTAP AIR PORTUGAL

Deal found 13/10£396

Tue 25/1106:00LHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

Sun 30/1122:30IAD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Deal found 13/10£397

Tue 25/1106:00LHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

Wed 10/1222:30IAD - LHR

1 stop19h 10mTAP AIR PORTUGAL

Deal found 13/10£399

Fri 5/1206:00LHR - IAD

1 stop20h 00mTAP AIR PORTUGAL

Tue 9/1217:30IAD - LHR

1 stop24h 10mTAP AIR PORTUGAL

Deal found 14/10£400

Sun 23/1118:30LHR - IAD

1 stop25h 45mTAP AIR PORTUGAL

Tue 2/1217:30IAD - LHR

1 stop19h 00mTAP AIR PORTUGAL

Deal found 14/10£404

Tue 25/1106:00LHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

Tue 2/1217:30IAD - LHR

1 stop24h 10mTAP AIR PORTUGAL

Deal found 14/10£412

Tue 2/1218:30LHR - IAD

1 stop31h 30mTAP AIR PORTUGAL

Tue 9/1217:30IAD - LHR

1 stop14h 10mTAP AIR PORTUGAL

Deal found 13/10£418

Wed 19/1109:55LHR - IAD

2 stops34h 20mMultiple Airlines

Sat 29/1117:30IAD - LHR

1 stop20h 25mMultiple Airlines

Deal found 14/10£437

Tue 2/1206:00LHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

Fri 5/1222:30IAD - LHR

1 stop18h 05mTAP AIR PORTUGAL

Deal found 13/10£447

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 15 October 2025.

Tue 20/119:50LHR - IAD

2 stops26h 25mScandinavian Airlines

Wed 4/220:30IAD - LHR

2 stops17h 20mScandinavian Airlines

Deal found 14/10£458

Fri 31/1011:05LHR - IAD

1 stop32h 30mUnited Airlines

Sat 1/1122:11IAD - LHR

1 stop33h 09mUnited Airlines

Deal found 13/10£464

Fri 13/316:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Mon 16/312:30IAD - LHR

1 stop14h 25mVirgin Atlantic

Deal found 14/10£536

Fri 16/119:50LHR - IAD

2 stops28h 00mScandinavian Airlines

Sat 31/120:30IAD - LHR

2 stops14h 55mScandinavian Airlines

Deal found 14/10£458

Wed 28/110:20LHR - IAD

1 stop11h 55mScandinavian Airlines

Thu 12/220:30IAD - LHR

1 stop14h 30mScandinavian Airlines

Deal found 14/10£475

Wed 31/1208:55LHR - IAD

1 stop18h 57mVirgin Atlantic

Thu 15/122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£538

Mon 8/1209:00LHR - IAD

1 stop13h 05mUnited Airlines

Mon 15/1222:06IAD - LHR

2 stops28h 04mUnited Airlines

Deal found 14/10£554

Tue 2/1218:05LHR - IAD

2 stops52h 10mScandinavian Airlines

Mon 8/1220:30IAD - LHR

1 stop16h 10mScandinavian Airlines

Deal found 13/10£498

Sat 24/106:40LHR - IAD

1 stop17h 10mScandinavian Airlines

Sun 8/212:30IAD - LHR

2 stops22h 30mScandinavian Airlines

Deal found 14/10£521

Mon 12/110:20LHR - IAD

1 stop11h 55mScandinavian Airlines

Tue 27/112:30IAD - LHR

2 stops22h 30mScandinavian Airlines

Deal found 14/10£521

Tue 25/1119:50LHR - IAD

2 stops26h 25mScandinavian Airlines

Wed 10/1220:30IAD - LHR

1 stop17h 00mScandinavian Airlines

Deal found 14/10£551

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 15 October 2025.

Sun 26/1016:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Tue 11/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£497

Thu 5/316:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Thu 12/323:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£506

Thu 19/216:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Thu 23/422:30IAD - LHR

Nonstop7h 20mVirgin Atlantic

Deal found 14/10£509

Wed 17/1216:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Sun 28/1222:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£509

Thu 20/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 26/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£511

Tue 9/1216:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Tue 6/122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 12/10£512

Sat 1/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Sat 15/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£514

Wed 5/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 12/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£515

Sat 8/1116:50LHR - IAD

Nonstop8h 40mVirgin Atlantic

Wed 12/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£516

Mon 6/417:35LHR - IAD

Nonstop8h 05mVirgin Atlantic

Fri 17/422:30IAD - LHR

Nonstop7h 20mVirgin Atlantic

Deal found 14/10£517

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

Mon 20/1006:30LHR - IAD

1 stop14h 05mVirgin Atlantic

Fri 7/1122:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£500

Mon 20/1008:40LHR - IAD

1 stop11h 55mVirgin Atlantic

Mon 27/1023:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£502

Mon 20/1006:30LHR - IAD

1 stop14h 05mVirgin Atlantic

Tue 4/1121:25IAD - LHR

1 stop14h 10mVirgin Atlantic

Deal found 14/10£511

Tue 21/1006:30LHR - IAD

1 stop14h 05mVirgin Atlantic

Sun 14/1222:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£503

Tue 21/1012:35LHR - IAD

Nonstop8h 25mVirgin Atlantic

Thu 30/1023:20IAD - LHR

Nonstop7h 30mVirgin Atlantic

Deal found 14/10£515

Tue 21/1008:40LHR - IAD

1 stop11h 55mVirgin Atlantic

Fri 31/1019:05IAD - LHR

1 stop17h 55mVirgin Atlantic

Deal found 14/10£517

Wed 22/1011:30LHR - IAD

1 stop12h 45mVirgin Atlantic

Fri 5/1212:30IAD - LHR

1 stop15h 30mVirgin Atlantic

Deal found 14/10£498

Wed 22/1008:40LHR - IAD

1 stop11h 55mVirgin Atlantic

Wed 1/422:30IAD - LHR

Nonstop7h 20mVirgin Atlantic

Deal found 13/10£515

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 15 October 2025.

Mon 16/318:45LHR - IAD

1 stop26h 45mMultiple Airlines

Deal found 13/10£364

Wed 5/1118:30LHR - IAD

1 stop25h 45mTAP AIR PORTUGAL

Deal found 14/10£365

Mon 10/1106:00LHR - IAD

1 stop14h 15mTAP AIR PORTUGAL

Deal found 14/10£366

Sat 8/1106:00LHR - IAD

1 stop14h 15mTAP AIR PORTUGAL

Deal found 13/10£367

Tue 2/1208:50LHR - IAD

2 stops15h 40mMultiple Airlines

Deal found 13/10£367

Wed 29/1006:00LHR - IAD

2 stops37h 06mMultiple Airlines

Deal found 14/10£369

Sun 16/1110:30LHR - IAD

3 stops33h 45mMultiple Airlines

Deal found 14/10£370

Mon 1/1220:05LHR - IAD

2 stops28h 25mMultiple Airlines

Deal found 14/10£371

Wed 12/1111:45LHR - IAD

3 stops32h 30mMultiple Airlines

Deal found 13/10£373

Wed 3/1219:05LHR - IAD

1 stop26h 25mIberia

Deal found 14/10£373

Fri 21/1112:25LHR - IAD

1 stop13h 35mTAP AIR PORTUGAL

Deal found 14/10£374

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 20/1

19:50-17:15

2 stops26h 25m

Washington, D.C. Dulles Intl

Wed 4/2

20:30-18:50

2 stops17h 20m

£458

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 16/1

19:50-18:50

2 stops28h 00m

Washington, D.C. Dulles Intl

Sat 31/1

20:30-16:25

2 stops14h 55m

£458

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 31/10

11:05-15:35

1 stop32h 30m

Washington, D.C. Dulles Intl

Sat 1/11

22:11-11:20

1 stop33h 09m

£464

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 28/1

10:20-17:15

1 stop11h 55m

Washington, D.C. Dulles Intl

Thu 12/2

20:30-16:00

1 stop14h 30m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 2/12

18:05-17:15

2 stops52h 10m

Washington, D.C. Dulles Intl

Mon 8/12

20:30-17:40

1 stop16h 10m

£498

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 24/1

06:40-18:50

1 stop17h 10m

Washington, D.C. Dulles Intl

Sun 8/2

12:30-16:00

2 stops22h 30m

£521

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 12/1

10:20-17:15

1 stop11h 55m

Washington, D.C. Dulles Intl

Tue 27/1

12:30-16:00

2 stops22h 30m

£521

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 13/3

16:50-21:30

Nonstop8h 40m

Washington, D.C. Dulles Intl

Mon 16/3

12:30-06:55

1 stop14h 25m

£536

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 31/12

08:55-22:52

1 stop18h 57m

Washington, D.C. Dulles Intl

Thu 15/1

22:20-10:50

Nonstop7h 30m

£538

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 25/11

19:50-17:15

2 stops26h 25m

Washington, D.C. Dulles Intl

Wed 10/12

20:30-18:30

1 stop17h 00m

£551

Flights are sorted by cheapest return flights first.

Deals found on 14/10

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 65 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of £382). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £540). 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

667 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

667 reviews

Virgin Atlantic

7.4

Good

667 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Aer Lingus

7.2

Good

1,336 reviews

Virgin Atlantic

7.4

Good

667 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Icelandair

7.0

Good

556 reviews

Virgin Atlantic

7.4

Good

667 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Lufthansa

6.8

Okay

7,487 reviews

Virgin Atlantic

7.4

Good

667 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

7,454 reviews

Virgin Atlantic

7.4

Good

667 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 Scandinavian Airlines and United Airlines fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in about 26h 25m. The time it takes to get you to your destination can typically vary by up to 6h 05m. There are 3664 mi between London Heathrow Airport and Washington, D.C. Dulles Intl Airport. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at £190, 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 TAP AIR PORTUGAL and Icelandair - these airlines can fly you to your destination from £356 and £375, respectively. Delta is currently priced 67% 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 (87%), Air France (87%) or Delta (87%) 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 £1,472 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £391 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £392.
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 Dublin Castle more than anywhere else. Bord Gáis Energy Theatre, 3Olympia Theatre, and Dublin Castle are located about 5.7 mi, 5.7 mi, and 5.8 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £26.
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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of £382). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £540). 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

Silver Spring

Hanover

Oxon Hill

Woodbridge

Arlington

Alexandria

College Park

Tysons

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Heathrow to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£190	Average£538	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
TAP AIR PORTUGAL	Cheapest£356	Average£506	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£375	Average£493	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Aer Lingus	Cheapest£393	Average£577	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£409	Average£598	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£432	Average£614	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£439	Average£586	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Virgin Atlantic	Cheapest£439	Average£608	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£441	Average£611	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air France	Cheapest£443	Average£599	FlexibilityNo cancel fee	On-time77%	Search Air France flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

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 Heathrow to Dulles Intl.

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

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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £364

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 16/3. 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 September or February, booked 65 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 15 October 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 15 October 2025.

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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?

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

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

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

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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Top 10 airlines flying from Heathrow to Dulles Intl

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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 15 October 2025.