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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £354

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
21 Jan — 28 Jan1
1 adult

The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in January or February, booked 60 days in advance, depart on a Tuesday or Friday 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 16 January 2025.

Round-trip from

£457

One-way from

£354

Popular in

August

Cheapest in

January

Average price

£570
Lufthansa
  • Lufthansa
  • 3/2-11/2
  • 1 total stop
  • 20h 50m total
  • London to Washington, D.C.
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10/3
  • 10/3
  • 3 total stops
  • 49h 25m total
  • London to Washington, D.C.
Search Deals
High demand for flights, 10% potential price rise
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Best time to find cheap flights, 2% potential price drop
Search Deals
Average for round-trip flights in January 2025
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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 16 January 2025.

Mon 3/207:40LHR - IAD
1 stop13h 15mLufthansa
Tue 11/222:15IAD - LHR
Nonstop7h 35mLufthansa
Deal found 15/1£457
Wed 26/206:00LHR - IAD
1 stop14h 30mMultiple Airlines
Tue 4/318:25IAD - LHR
Nonstop7h 15mMultiple Airlines
Deal found 15/1£458
Wed 2/411:20LHR - IAD
1 stop14h 00mTAP AIR PORTUGAL
Sun 20/422:20IAD - LHR
1 stop18h 40mTAP AIR PORTUGAL
Deal found 15/1£460
Mon 10/220:40LHR - IAD
1 stop26h 45mIcelandair
Tue 18/219:40IAD - LHR
1 stop10h 10mIcelandair
Deal found 15/1£465
Mon 3/211:50LHR - IAD
1 stop17h 08mFinnair
Tue 11/213:52IAD - LHR
2 stops15h 23mFinnair
Deal found 15/1£466
Mon 27/106:30LHR - IAD
1 stop14h 15mVirgin Atlantic
Mon 3/218:45IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 14/1£469
Wed 26/206:30LHR - IAD
2 stops14h 54mUnited Airlines
Tue 13/515:35IAD - LHR
1 stop12h 45mUnited Airlines
Deal found 15/1£471
Mon 27/108:40LHR - IAD
1 stop12h 05mKLM
Mon 3/218:45IAD - LHR
Nonstop7h 30mKLM
Deal found 15/1£473
Tue 28/108:50LHR - IAD
1 stop11h 50mAer Lingus
Tue 4/217:10IAD - LHR
1 stop15h 15mAer Lingus
Deal found 14/1£479
Mon 3/312:05LHR - IAD
1 stop31h 30mAustrian Airlines
Sat 8/317:45IAD - LHR
2 stops45h 50mAustrian Airlines
Deal found 15/1£481
Tue 28/108:55LHR - IAD
1 stop35h 35mSWISS
Tue 4/217:30IAD - LHR
1 stop19h 20mSWISS
Deal found 14/1£483
Sun 26/111:45LHR - IAD
1 stop33h 00mDelta
Thu 18/918:10IAD - LHR
Nonstop7h 35mDelta
Deal found 15/1£496

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 16 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 3/2

07:40-15:55

1 stop13h 15m

Washington, D.C. Dulles Intl

Tue 11/2

22:15-10:50

Nonstop7h 35m

£457

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 26/2

06:00-15:30

1 stop14h 30m

Washington, D.C. Dulles Intl

Tue 4/3

18:25-06:40

Nonstop7h 15m

£458

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 2/4

11:20-20:20

1 stop14h 00m

Washington, D.C. Dulles Intl

Sun 20/4

22:20-22:00

1 stop18h 40m

£460

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 3/2

11:50-23:58

1 stop17h 08m

Washington, D.C. Dulles Intl

Tue 11/2

13:52-10:15

2 stops15h 23m

£466

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 8/2

12:15-18:25

1 stop11h 10m

Washington, D.C. Dulles Intl

Tue 25/2

19:40-10:50

1 stop10h 10m

£467

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 27/1

06:30-15:45

1 stop14h 15m

Washington, D.C. Dulles Intl

Mon 3/2

18:45-07:15

Nonstop7h 30m

£469

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 26/2

06:30-16:24

2 stops14h 54m

Washington, D.C. Dulles Intl

Tue 13/5

15:35-09:20

1 stop12h 45m

£471

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 27/1

08:40-15:45

1 stop12h 05m

Washington, D.C. Dulles Intl

Mon 3/2

18:45-07:15

Nonstop7h 30m

£473

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 28/1

08:50-15:40

1 stop11h 50m

Washington, D.C. Dulles Intl

Tue 4/2

17:10-13:25

1 stop15h 15m

£479

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 3/3

12:05-14:35

1 stop31h 30m

Washington, D.C. Dulles Intl

Sat 8/3

17:45-20:35

2 stops45h 50m

£481

Flights are sorted by cheapest return flights first.

Deals found on 15/1

Showing 1-10 of 29 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 10 January 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 £938). 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 16 January 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 22% 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 December 2024.

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 16 January 2025.

The most flights from LHR to IAD are scheduled on a Monday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 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 16 January 2025.
Peruse reviews from past customers who have flown with Icelandair, Aer Lingus 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
8,511 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 10

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

Delta
8.0
Very Good
8,511 reviews
Delta
8.0
Very Good
8,511 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 10

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

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very Good
8,511 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 10

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

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very Good
8,511 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 10

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

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very Good
8,511 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 10

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

SWISS
7.5
Good
1,598 reviews
Delta
8.0
Very Good
8,511 reviews
Check prices

Crew

8.6

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 10

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 £457, 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 TAP AIR PORTUGAL and Finnair - these airlines can fly you to your destination from £460 and £466, respectively. Lufthansa is currently priced 31% 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 £374 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from £416 and TAP AIR PORTUGAL from £429 one-way.

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

    Consider Air Canada (93%), Austrian Airlines (93%) or Copa Airlines (93%) 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 £1,391 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £469 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £386.

  • 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 £40.

  • 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 £938). 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
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Laurel
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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 16 January 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 16 January 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£289Average£494FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£350Average£836FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£410Average£562FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£413Average£628FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£419Average£785FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Scandinavian AirlinesCheapest£431Average£595FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Air CanadaCheapest£448Average£721FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air FranceCheapest£483Average£685FlexibilityNo cancel feeOn-time77%
Search Air France flights
Aer LingusCheapest£490Average£647FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£492Average£691FlexibilityNo 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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