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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £367

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
22 Dec — 29 Dec1
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 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 17 December 2024.

Round-trip from

£443

One-way from

£367

Popular in

August

Cheapest in

January

Average price

£696
12/2-16/2
  • 12/2-16/2
  • 5 total stops
  • 52h 40m total
  • London to Washington, D.C.
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9/1
  • 9/1
  • 2 total stops
  • 34h 45m total
  • London to Washington, D.C.
Search Deals
High demand for flights, 11% 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 December 2024
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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 17 December 2024.

Sat 28/1218:00LHR - IAD
1 stop20h 46mLufthansa
Tue 7/122:20IAD - LHR
1 stop17h 15mLufthansa
Deal found 16/12£585
Tue 24/1218:30LHR - IAD
1 stop31h 30mTAP AIR PORTUGAL
Fri 10/122:30IAD - LHR
1 stop15h 25mTAP AIR PORTUGAL
Deal found 16/12£587
Wed 25/1206:40LHR - IAD
1 stop14h 00mScandinavian Airlines
Fri 17/117:10IAD - LHR
2 stops20h 20mScandinavian Airlines
Deal found 16/12£639
Sun 29/1206:30LHR - IAD
1 stop13h 10mMultiple Airlines
Sun 26/115:55IAD - LHR
1 stop10h 15mMultiple Airlines
Deal found 16/12£645
Tue 31/1214:30LHR - IAD
1 stop24h 16mUnited Airlines
Mon 6/122:35IAD - LHR
1 stop28h 20mUnited Airlines
Deal found 16/12£699
Sun 29/1209:00LHR - IAD
1 stop15h 25mKLM
Sun 26/118:25IAD - LHR
Nonstop7h 30mKLM
Deal found 16/12£728
Sat 28/1210:05LHR - IAD
1 stop35h 10mAustrian Airlines
Tue 7/117:25IAD - LHR
2 stops46h 10mAustrian Airlines
Deal found 16/12£757
Sun 29/1206:30LHR - IAD
1 stop14h 15mVirgin Atlantic
Sun 26/118:25IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 16/12£771
Wed 25/1208:40LHR - IAD
1 stop12h 05mDelta
Thu 9/120:40IAD - LHR
Nonstop7h 30mDelta
Deal found 16/12£794
Sun 29/1214:30LHR - IAD
1 stop24h 16mAir Canada
Sun 26/110:35IAD - LHR
2 stops15h 35mAir Canada
Deal found 16/12£899
Wed 25/1212:25LHR - IAD
Nonstop8h 40mAir France
Tue 31/1221:20IAD - LHR
Nonstop7h 10mAir France
Deal found 16/12£921

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 17 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 12/2

20:50-15:00

2 stops23h 10m

Washington, D.C. Dulles Intl

Sun 16/2

22:30-09:00

3 stops29h 30m

£443

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 8/2

15:00-20:55

2 stops34h 55m

Washington, D.C. Dulles Intl

Mon 10/2

17:30-11:15

1 stop12h 45m

£459

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 18/1

18:00-09:46

1 stop20h 46m

Washington, D.C. Dulles Intl

Tue 21/1

17:45-08:25

1 stop9h 40m

£464

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 13/2

06:00-15:00

1 stop14h 00m

Washington, D.C. Dulles Intl

Tue 4/3

17:30-21:35

1 stop23h 05m

£475

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 27/1

12:15-18:25

1 stop11h 10m

Washington, D.C. Dulles Intl

Mon 3/2

19:40-19:30

1 stop18h 50m

£480

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 13/2

19:30-15:40

1 stop25h 10m

Washington, D.C. Dulles Intl

Sun 23/2

17:10-16:00

1 stop17h 50m

£487

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 28/1

06:00-14:35

1 stop13h 35m

Washington, D.C. Dulles Intl

Sat 1/2

17:25-20:35

2 stops46h 10m

£527

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 13/1

08:50-15:40

1 stop11h 50m

Washington, D.C. Dulles Intl

Wed 15/1

17:10-10:20

1 stop12h 10m

£549

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 16/2

14:05-15:45

1 stop30h 40m

Washington, D.C. Dulles Intl

Mon 17/3

19:45-07:15

Nonstop7h 30m

£569

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 10/1

12:10-15:35

Nonstop8h 25m

Washington, D.C. Dulles Intl

Tue 28/1

09:11-06:15

2 stops16h 04m

£574

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 25 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 13 December 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 £599). 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 17 December 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 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 17 December 2024.

The most flights from LHR to IAD are scheduled on a Monday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (22 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 17 December 2024.
Peruse reviews from past customers who have flown with TAP AIR PORTUGAL, Scandinavian Airlines and Virgin Atlantic 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.
KLM
7.8
Good
1,351 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.9

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

KLM
7.8
Good
1,351 reviews
KLM
7.8
Good
1,351 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.9

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Finnair
7.7
Good
1,287 reviews
KLM
7.8
Good
1,351 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.9

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Austrian Airlines
7.6
Good
788 reviews
KLM
7.8
Good
1,351 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.9

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Virgin Atlantic
7.5
Good
667 reviews
KLM
7.8
Good
1,351 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.9

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Air France
7.4
Good
1,505 reviews
KLM
7.8
Good
1,351 reviews
Check prices

Comfort

7.7

Entertainment

7.2

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.9

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

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 £459, United Airlines will fly you from London Heathrow Airport to Washington, D.C. Dulles Intl Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and TAP AIR PORTUGAL - these airlines can fly you to your destination from £464 and £475, respectively. United Airlines is currently priced 28% 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 £381 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £413 and WestJet from £453 one-way.

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

    Consider Air Canada (89%), Austrian Airlines (89%) or Copa Airlines (89%) 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 £1,317 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £509 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £424.

  • 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 £599). 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

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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 17 December 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 858,174 searches. Data last updated 17 December 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£282Average£462FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
DeltaCheapest£338Average£665FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£396Average£548FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£400Average£610FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£404Average£758FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Scandinavian AirlinesCheapest£416Average£564FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
American AirlinesCheapest£420Average£676FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest£432Average£696FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£456Average£653FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£457Average£623FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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