Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £237

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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
20 Nov — 27 Nov1
1 adult

The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in January or February, booked 62 days in advance, depart on a Tuesday or Thursday and return on a Saturday

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 15 November 2024.

Round-trip from

£390

One-way from

£237

Popular in

August

Cheapest in

January
6/12-9/12
  • 6/12-9/12
  • 4 total stops
  • 53h 55m total
  • London to Washington, D.C.
Search Deals
11/3
  • 11/3
  • 1 total stop
  • 14h 25m total
  • London to Washington, D.C.
Search Deals
High demand for flights, 20% potential price rise
Search Deals
Best time to find cheap flights, 21% potential price drop
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 15 November 2024.

Thu 28/1106:20LHR - IAD
2 stops15h 40mMultiple Airlines
Tue 3/1218:10IAD - LHR
2 stops19h 10mMultiple Airlines
Deal found 14/11£438
Thu 26/1206:00LHR - IAD
1 stop14h 00mTAP AIR PORTUGAL
Tue 28/117:30IAD - LHR
1 stop23h 05mTAP AIR PORTUGAL
Deal found 14/11£485
Tue 26/1120:40LHR - IAD
1 stop26h 45mIcelandair
Mon 2/1219:40IAD - LHR
1 stop10h 10mIcelandair
Deal found 15/11£502
Thu 28/1107:50LHR - IAD
1 stop12h 50mAer Lingus
Tue 3/1217:10IAD - LHR
1 stop9h 55mAer Lingus
Deal found 14/11£517
Tue 24/1219:30LHR - IAD
1 stop25h 10mScandinavian Airlines
Mon 13/117:10IAD - LHR
1 stop23h 30mScandinavian Airlines
Deal found 14/11£520
Fri 22/1107:10LHR - IAD
1 stop12h 25mLufthansa
Sat 30/1117:56IAD - LHR
1 stop32h 14mLufthansa
Deal found 14/11£528
Mon 9/1212:25LHR - IAD
Nonstop8h 40mVirgin Atlantic
Mon 16/1218:45IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 14/11£611
Wed 4/1216:20LHR - IAD
Nonstop8h 55mAustrian Airlines
Mon 9/1222:15IAD - LHR
Nonstop7h 35mAustrian Airlines
Deal found 15/11£627
Tue 10/1216:20LHR - IAD
Nonstop8h 55mUnited Airlines
Thu 9/118:25IAD - LHR
Nonstop7h 15mUnited Airlines
Deal found 15/11£630
Thu 28/1112:10LHR - IAD
Nonstop8h 25mIberia
Thu 12/1221:55IAD - LHR
Nonstop7h 10mIberia
Deal found 14/11£636

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 943,810 searches. Data last updated 15 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 24/4

07:40-17:40

1 stop15h 00m

Washington, D.C. Dulles Intl

Thu 8/5

18:50-14:40

1 stop14h 50m

£427

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 28/1

06:00-14:30

1 stop13h 30m

Washington, D.C. Dulles Intl

Sun 2/2

22:30-17:30

1 stop14h 00m

£438

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 22/2

12:15-18:25

1 stop11h 10m

Washington, D.C. Dulles Intl

Sat 1/3

19:40-19:30

1 stop18h 50m

£468

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 10/1

06:40-15:40

1 stop14h 00m

Washington, D.C. Dulles Intl

Fri 24/1

17:10-18:30

2 stops20h 20m

£505

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 28/11

07:50-15:40

1 stop12h 50m

Washington, D.C. Dulles Intl

Tue 3/12

17:10-08:05

1 stop9h 55m

£517

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 7/12

14:30-09:46

1 stop24h 16m

Washington, D.C. Dulles Intl

Sat 14/12

22:15-10:50

Nonstop7h 35m

£558

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 28/11

16:30-23:58

2 stops36h 28m

Washington, D.C. Dulles Intl

Thu 12/12

18:00-06:15

Nonstop7h 15m

£561

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 17/3

12:25-17:05

Nonstop8h 40m

Washington, D.C. Dulles Intl

Thu 27/3

21:40-09:10

Nonstop7h 30m

£581

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 13/1

19:25-14:35

1 stop24h 10m

Washington, D.C. Dulles Intl

Sun 19/1

18:25-06:40

Nonstop7h 15m

£602

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 1/2

13:25-18:40

2 stops34h 15m

£325

Flights are sorted by cheapest first

Deals found on 15/11

Showing 1-10 of 14 results
1
2

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 8 November 2024.

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 62 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 £606). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £898). 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 15 November 2024.

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 10 November 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight should consider departing on Thursday 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 15 November 2024.

The most flights from LHR to IAD are scheduled on a Wednesday (26 on average). You will have fewer flight options on Monday, 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 15 November 2024.
Peruse reviews from past customers who have flown with TAP AIR PORTUGAL, Icelandair and Scandinavian 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
8,786 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

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
8,786 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

Finnair
7.7
Good
1,304 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

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
810 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

Virgin Atlantic
7.6
Good
662 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

Scandinavian Airlines
7.3
Good
1,303 reviews
Delta
8.0
Very Good
8,786 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

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 £468, TAP AIR PORTUGAL will fly you from London Heathrow Airport to Washington, D.C. Dulles Intl Airport and back. In addition to TAP AIR PORTUGAL, 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 £472 and £505, respectively. TAP AIR PORTUGAL is currently priced 25% 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 £384 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £423 and Aer Lingus from £459 one-way.

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

    Consider Air Canada (79%), Austrian Airlines (79%) or Copa Airlines (79%) 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 £1,343 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £497 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £418.

  • 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 Harpa, National Cathedral, and Hallgrímskirkja more than anywhere else. Harpa, National Cathedral, and Hallgrímskirkja are located about 23.3 mi, 23.0 mi, and 23.2 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 £38.

  • 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 £606). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £898). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 15 November 2024.
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 943,810 searches. Data last updated 15 November 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£281Average£449FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£338Average£662FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£393Average£551FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Brussels AirlinesCheapest£404Average£757FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Scandinavian AirlinesCheapest£416Average£564FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£417Average£620FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
American AirlinesCheapest£419Average£675FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest£432Average£651FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£436Average£668FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£442Average£638FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines