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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £318

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 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
25 Feb — 4 Mar1
1 adult

The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or November, booked 60 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap 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 20 February 2025.

Round-trip from

£434

One-way from

£318

Popular in

August

Cheapest in

February

Average price

£569

Good round-trip deal

£539 or less

Good one-way deal

£595 or less
Lufthansa
  • Lufthansa
  • 17/3-29/3
  • 3 total stops
  • 50h 23m total
  • London to Washington, D.C.
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28/5
  • 28/5
  • 2 total stops
  • 28h 05m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from London Heathrow to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from London Heathrow to Washington, D.C. Dulles Intl.
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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 20 February 2025.

Mon 17/308:45LHR - IAD
1 stop16h 20mLufthansa
Sat 29/317:32IAD - LHR
2 stops34h 03mLufthansa
Deal found 19/2£434
Thu 24/413:05LHR - IAD
1 stop11h 15mIcelandair
Mon 28/420:30IAD - LHR
1 stop10h 25mIcelandair
Deal found 19/2£462
Fri 28/218:40LHR - IAD
1 stop26h 00mScandinavian Airlines
Mon 3/317:10IAD - LHR
1 stop11h 10mScandinavian Airlines
Deal found 20/2£468
Wed 14/508:00LHR - IAD
1 stop12h 20mTAP AIR PORTUGAL
Sun 18/522:20IAD - LHR
1 stop18h 40mTAP AIR PORTUGAL
Deal found 19/2£501
Wed 19/316:30LHR - IAD
Nonstop8h 15mFinnair
Tue 25/319:00IAD - LHR
Nonstop7h 15mFinnair
Deal found 19/2£507
Fri 25/416:40LHR - IAD
Nonstop8h 10mUnited Airlines
Sat 26/417:20IAD - LHR
1 stop32h 15mUnited Airlines
Deal found 19/2£509
Thu 20/312:10LHR - IAD
Nonstop8h 25mBritish Airways
Thu 27/317:28IAD - LHR
1 stop11h 47mBritish Airways
Deal found 19/2£510
Wed 5/307:10LHR - IAD
1 stop12h 25mBrussels Airlines
Sat 8/317:55IAD - LHR
1 stop38h 35mBrussels Airlines
Deal found 19/2£513
Fri 28/306:00LHR - IAD
1 stop15h 25mMultiple Airlines
Mon 31/322:15IAD - LHR
Nonstop7h 25mMultiple Airlines
Deal found 19/2£514
Thu 20/308:55LHR - IAD
1 stop12h 30mSWISS
Thu 27/321:45IAD - LHR
1 stop11h 15mSWISS
Deal found 19/2£514
Sat 1/308:40LHR - IAD
1 stop12h 05mVirgin Atlantic
Sat 8/321:00IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 20/2£526
Mon 24/312:10LHR - IAD
Nonstop8h 25mAmerican Airlines
Sun 6/417:50IAD - LHR
Nonstop7h 25mAmerican Airlines
Deal found 19/2£529

Find flights from Heathrow to Dulles Intl within your budget

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 20 February 2025.

Fly from

Heathrow

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 17/3

08:45-21:05

1 stop16h 20m

Washington, D.C. Dulles Intl

Sat 29/3

17:32-07:35

2 stops34h 03m

£434

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 24/4

13:05-19:20

1 stop11h 15m

Washington, D.C. Dulles Intl

Mon 28/4

20:30-11:55

1 stop10h 25m

£462

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 6/3

06:40-15:40

1 stop14h 00m

Washington, D.C. Dulles Intl

Sat 29/3

18:10-16:40

1 stop18h 30m

£470

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 14/5

08:00-15:20

1 stop12h 20m

Washington, D.C. Dulles Intl

Sun 18/5

22:20-22:00

1 stop18h 40m

£501

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 19/3

16:30-20:45

Nonstop8h 15m

Washington, D.C. Dulles Intl

Tue 25/3

19:00-06:15

Nonstop7h 15m

£507

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 25/4

16:40-19:50

Nonstop8h 10m

Washington, D.C. Dulles Intl

Sat 26/4

17:20-06:35

1 stop32h 15m

£509

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 20/3

12:10-16:35

Nonstop8h 25m

Washington, D.C. Dulles Intl

Thu 27/3

17:28-09:15

1 stop11h 47m

£510

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 5/3

07:10-14:35

1 stop12h 25m

Washington, D.C. Dulles Intl

Sat 8/3

17:55-13:30

1 stop38h 35m

£513

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 28/3

06:00-17:25

1 stop15h 25m

Washington, D.C. Dulles Intl

Mon 31/3

22:15-10:40

Nonstop7h 25m

£514

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 20/3

08:55-17:25

1 stop12h 30m

Washington, D.C. Dulles Intl

Thu 27/3

21:45-13:00

1 stop11h 15m

£514

Flights are sorted by cheapest return flights first.

Deals found on 18/2

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.

Travel insights for flights from Heathrow to Dulles Intl

Get recent, data-driven insights about flights from Heathrow to Dulles Intl including ideal travel times, pricing trends, and more.

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 14 February 2025.

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 60 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?

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 20 February 2025.

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 21% 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?

Use this chart to determine the cheapest time to fly return from Heathrow to Dulles Intl. Price data was last updated on 16 February 2025.

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.

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

Explore weekly flight availability from Heathrow to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 20 February 2025.

The most flights from LHR to IAD are scheduled on a Tuesday (25 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (17 on average).

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

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.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

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).

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 20 February 2025.
Peruse reviews from past customers who have flown with Delta, Finnair and Austrian Airlines from London to Washington, D.C. to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,236 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,236 reviews
Delta
8.0
Very Good
8,236 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,274 reviews
Delta
8.0
Very Good
8,236 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
774 reviews
Delta
8.0
Very Good
8,236 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,568 reviews
Delta
8.0
Very Good
8,236 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very Good
8,236 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    Currently priced at £434, Lufthansa will fly you from London Heathrow Airport to Washington, D.C. Dulles Intl Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Scandinavian Airlines - these airlines can fly you to your destination from £462 and £470, respectively. Lufthansa is currently priced 34% 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 £432 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from £458 and TAP AIR PORTUGAL from £469 one-way.

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

    Consider Air Canada (90%), Austrian Airlines (90%) or Copa Airlines (90%) 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 £1,059 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £459 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £378.

  • 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 Reykjavik most frequently.

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

    Reykjavik travellers tend to visit National Cathedral, Hallgrímskirkja, and Harpa more than anywhere else. National Cathedral, Hallgrímskirkja, and Harpa are located about 23.0 mi, 23.2 mi, and 23.3 mi, respectively from Reykjavik Keflavik Intl. Those on a stopover in Reykjavik in need of a car hire can book one at Reykjavik Keflavik Intl for about £37.

  • 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 Dublin.

  • 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.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Silver Spring
Arlington
Woodbridge
College Park
Laurel
Tysons

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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 20 February 2025.
British Airways flights from London Heathrow to Washington, D.C. Dulles Intl
Virgin Atlantic 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 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£295Average£486FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£340Average£811FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Brussels AirlinesCheapest£406Average£762FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
IcelandairCheapest£410Average£548FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£430Average£626FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£467Average£611FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air FranceCheapest£467Average£649FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£480Average£717FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£490Average£659FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£496Average£672FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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

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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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