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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £363

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
2 Mar — 9 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in September or February, booked 69 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 31 January 2026.

Sat 14/219:25
LHR
-
IAD
1 stop24h 15m
Austrian Airlines
Wed 18/222:15
IAD
-
LHR
Nonstop7h 35m
Austrian Airlines
Deal found 30/1£392
Tue 21/421:25
LHR
-
IAD
1 stop26h 55m
Icelandair
Sun 26/420:30
IAD
-
LHR
1 stop10h 25m
Icelandair
Deal found 29/1£392
Thu 12/206:00
LHR
-
IAD
1 stop15h 40m
SWISS
Sun 22/220:30
IAD
-
LHR
1 stop14h 50m
SWISS
Deal found 30/1£393
Thu 19/306:00
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Tue 31/318:25
IAD
-
LHR
Nonstop7h 30m
Austrian Airlines
Deal found 29/1£394
Fri 13/214:50
LHR
-
IAD
1 stop28h 50m
Austrian Airlines
Mon 16/218:00
IAD
-
LHR
1 stop15h 05m
Austrian Airlines
Deal found 30/1£394
Thu 12/206:00
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Thu 19/218:00
IAD
-
LHR
1 stop15h 05m
Austrian Airlines
Deal found 30/1£397
Sun 15/209:05
LHR
-
IAD
1 stop34h 35m
Austrian Airlines
Wed 11/319:00
IAD
-
LHR
1 stop19h 40m
Austrian Airlines
Deal found 30/1£397
Mon 9/206:00
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Sun 15/222:15
IAD
-
LHR
Nonstop7h 35m
Austrian Airlines
Deal found 29/1£398
Sun 15/306:00
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Sun 22/319:20
IAD
-
LHR
Nonstop7h 20m
Austrian Airlines
Deal found 29/1£399
Fri 6/206:00
LHR
-
IAD
1 stop13h 40m
Austrian Airlines
Wed 11/218:20
IAD
-
LHR
Nonstop7h 20m
Austrian Airlines
Deal found 29/1£400

Find flight deals from Heathrow to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 31 January 2026.

Round-trip from

£392

One-way from

£363

Popular in

July

Cheapest in

September

Average price

£511

Good round-trip deal

£415 or less

Good one-way deal

£463 or less
Austrian Airlines
  • Austrian Airlines
  • 14/2-18/2
  • 1 total stop
  • 31h 50m total
  • London to Washington, D.C.
Search Deals
2/3
  • 2/3
  • 3 total stops
  • 28h 05m 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 (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 31 January 2026.
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

Heathrow

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 14/2

19:25-14:40

1 stop24h 15m

Washington, D.C. Dulles Intl

Tue 17/2

18:20-06:40

Nonstop7h 20m

£402

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 13/2

08:30-15:50

1 stop12h 20m

Washington, D.C. Dulles Intl

Wed 25/2

17:40-10:25

1 stop11h 45m

£407

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 10/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Tue 24/2

18:20-06:40

Nonstop7h 20m

£431

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 10/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Fri 13/2

18:20-06:40

Nonstop7h 20m

£431

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 9/3

18:40-17:40

1 stop27h 00m

Washington, D.C. Dulles Intl

Sat 14/3

21:30-13:00

1 stop11h 30m

£432

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 28/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 19/3

06:00-20:35

1 stop10h 35m

£432

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 10/3

09:00-17:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 12/3

06:00-21:20

1 stop11h 20m

£432

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 1/3

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Thu 19/3

06:00-20:35

1 stop10h 35m

£432

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 12/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Sun 15/2

08:20-07:10

2 stops17h 50m

£434

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 18/2

06:30-14:35

1 stop13h 05m

Washington, D.C. Dulles Intl

Fri 20/2

18:20-06:40

Nonstop7h 20m

£434

Flights are sorted by cheapest return flights first.

Deals found on 29/1

Showing 1-10 of 24 results
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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

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Dulles Intl. Price data was last updated on 30 January 2026.

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 69 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 £372). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £458). 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?

Find hourly flight availability from Heathrow to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 31 January 2026.

When flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 31 January 2026.
Read reviews from past customers who have flown with Austrian Airlines, Virgin Atlantic, andAer Lingus 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.
Austrian Airlines
7.5
Good
896 reviews
Check prices

Crew

8.1

Food

6.8

Overall

7.5

Comfort

7.3

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Austrian Airlines
7.5
Good
896 reviews
Austrian Airlines
7.5
Good
896 reviews
Check prices

Crew

8.1

Food

6.8

Overall

7.5

Comfort

7.3

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Virgin Atlantic
7.5
Good
678 reviews
Austrian Airlines
7.5
Good
896 reviews
Check prices

Crew

8.1

Food

6.8

Overall

7.5

Comfort

7.3

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Aer Lingus
7.2
Good
1,444 reviews
Austrian Airlines
7.5
Good
896 reviews
Check prices

Crew

8.1

Food

6.8

Overall

7.5

Comfort

7.3

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Lufthansa
6.8
Okay
7,758 reviews
Austrian Airlines
7.5
Good
896 reviews
Check prices

Crew

8.1

Food

6.8

Overall

7.5

Comfort

7.3

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
British Airways
6.7
Okay
7,706 reviews
Austrian Airlines
7.5
Good
896 reviews
Check prices

Crew

8.1

Food

6.8

Overall

7.5

Comfort

7.3

Boarding

7.6

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

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?

    Airlines like Austrian Airlines, Lufthansa, and United Airlines fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in about 12h 20m. The time it takes to get you to your destination can typically vary by up to 11h 55m. 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 £184, 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 Icelandair and TAP AIR PORTUGAL - these airlines can fly you to your destination from £328 and £334, respectively. Delta is currently priced 66% below the average price you’ll pay for this route.

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

    One-way options have recently been found by users for as low as £361 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from £377 and Icelandair from £408 one-way.

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

    Consider Air Canada (83%), Austrian Airlines (83%) or Copa Airlines (83%) 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 £1,348 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £369 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £335.

  • 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 3Olympia Theatre, Bord Gáis Energy Theatre, and Dublin Castle more than anywhere else. 3Olympia Theatre, Bord Gáis Energy 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 £21.

  • 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 £372). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £458). 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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

Browse thousands of different options on Cheapflights for your next trip

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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 31 January 2026.
Virgin Atlantic flights from London Heathrow to Washington, D.C. Dulles Intl
British Airways flights from London Heathrow to Washington, D.C. Dulles Intl
Lufthansa flights from London Heathrow to Washington, D.C. Dulles Intl

Top 10 airlines flying from Heathrow to Dulles Intl

Discover the top 10 airlines that operate flights from Heathrow to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 31 January 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£184Average£505FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£328Average£467FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£334Average£467FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£368Average£580FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£384Average£530FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£394Average£576FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£407Average£603FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
Virgin AtlanticCheapest£409Average£552FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£410Average£568FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£415Average£575FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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?

Need flexible booking options for your flight to Dulles Intl from Heathrow? 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 Heathrow to Dulles Intl become cheaper?

Yes! Start tracking prices for Heathrow to Dulles Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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