Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £429
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 29/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
4 Jan — 11 Jan1
Return
1 adult
Economy
Return
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 74 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 5 December 2025.
Wed 10/1209:00LHR - IAD
2 stops16h 26mAir Canada
Wed 7/109:45IAD - LHR
1 stop16h 25mAir Canada
Deal found 3/12£468
Wed 24/1216:20LHR - IAD
Nonstop8h 55mLufthansa
Wed 21/122:15IAD - LHR
Nonstop7h 35mLufthansa
Deal found 3/12£471
Wed 24/1209:55LHR - IAD
2 stops36h 20mScandinavian Airlines
Wed 7/120:30IAD - LHR
2 stops19h 50mScandinavian Airlines
Deal found 4/12£474
Wed 10/1206:00LHR - IAD
1 stop14h 30mMultiple Airlines
Wed 7/118:20IAD - LHR
Nonstop7h 20mMultiple Airlines
Deal found 3/12£477
Wed 24/1210:35LHR - IAD
2 stops35h 40mScandinavian Airlines
Wed 21/120:30IAD - LHR
1 stop16h 10mScandinavian Airlines
Deal found 3/12£477
Sat 6/1213:25LHR - IAD
1 stop26h 58mUnited Airlines
Sun 7/1218:20IAD - LHR
Nonstop7h 20mUnited Airlines
Deal found 4/12£489
Tue 16/1211:45LHR - IAD
1 stop16h 23mAmerican Airlines
Fri 9/113:08IAD - LHR
1 stop15h 07mAmerican Airlines
Deal found 5/12£495
Tue 16/1206:00LHR - IAD
1 stop14h 30mSWISS
Fri 9/120:30IAD - LHR
1 stop14h 50mSWISS
Deal found 3/12£496
Tue 16/1206:00LHR - IAD
1 stop15h 40mMultiple Airlines
Thu 8/122:55IAD - LHR
1 stop11h 55mMultiple Airlines
Deal found 4/12£497
Sat 20/1217:50LHR - IAD
1 stop27h 15mVirgin Atlantic
Sat 10/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£499
Best flights from Heathrow to Dulles Intl
Discover carefully curated flight deals from Heathrow to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.
Fri 30/119:50LHR - IAD
2 stops28h 00mScandinavian Airlines
Mon 16/220:30IAD - LHR
2 stops14h 55mScandinavian Airlines
Deal found 4/12£468
Wed 4/310:00LHR - IAD
1 stop11h 05mMultiple Airlines
Wed 11/323:20IAD - LHR
Nonstop7h 30mMultiple Airlines
Deal found 4/12£487
Thu 19/316:25LHR - IAD
Nonstop8h 30mFinnair
Mon 30/322:20IAD - LHR
Nonstop7h 25mFinnair
Deal found 4/12£499
Tue 17/212:10LHR - IAD
Nonstop8h 25mBritish Airways
Thu 26/218:20IAD - LHR
Nonstop7h 10mBritish Airways
Deal found 3/12£499
Thu 19/310:20LHR - IAD
1 stop11h 55mScandinavian Airlines
Wed 1/420:20IAD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 4/12£477
Tue 10/208:25LHR - IAD
1 stop13h 05mMultiple Airlines
Fri 20/216:40IAD - LHR
1 stop14h 20mMultiple Airlines
Deal found 4/12£488
Thu 19/316:25LHR - IAD
Nonstop8h 30mFinnair
Wed 1/417:40IAD - LHR
Nonstop7h 40mFinnair
Deal found 4/12£499
Wed 15/407:05LHR - IAD
2 stops14h 45mScandinavian Airlines
Wed 29/420:20IAD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 4/12£480
Thu 19/316:25LHR - IAD
Nonstop8h 30mMultiple Airlines
Wed 1/414:03IAD - LHR
1 stop11h 52mMultiple Airlines
Deal found 4/12£499
Fri 23/118:40LHR - IAD
1 stop29h 10mScandinavian Airlines
Mon 26/116:50IAD - LHR
1 stop19h 50mScandinavian Airlines
Deal found 4/12£492
Thu 19/312:10LHR - IAD
Nonstop8h 25mMultiple Airlines
Sun 29/316:46IAD - LHR
1 stop11h 19mMultiple Airlines
Deal found 4/12£499
Direct flights from Heathrow to Dulles Intl
Explore direct flight options from Heathrow to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 December 2025.
Wed 14/112:05LHR - IAD
Nonstop8h 30mAustrian Airlines
Fri 23/118:05IAD - LHR
Nonstop7h 35mAustrian Airlines
Deal found 3/12£468
Thu 12/216:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Sun 15/222:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£469
Tue 12/517:05LHR - IAD
Nonstop8h 15mAmerican Airlines
Tue 19/522:20IAD - LHR
Nonstop7h 25mAmerican Airlines
Deal found 3/12£471
Wed 24/1216:20LHR - IAD
Nonstop8h 55mLufthansa
Wed 21/122:15IAD - LHR
Nonstop7h 35mLufthansa
Deal found 3/12£471
Fri 6/216:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Thu 19/222:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£474
Sun 22/216:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Sat 7/322:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£477
Wed 18/216:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Sat 28/222:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£477
Tue 3/212:10LHR - IAD
Nonstop8h 25mBritish Airways
Fri 27/218:20IAD - LHR
Nonstop7h 10mBritish Airways
Deal found 3/12£478
Tue 17/216:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Thu 26/222:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£479
Mon 2/216:25LHR - IAD
Nonstop8h 30mBritish Airways
Mon 9/221:45IAD - LHR
Nonstop7h 15mBritish Airways
Deal found 3/12£480
Thu 26/316:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Sun 5/422:30IAD - LHR
Nonstop7h 20mVirgin Atlantic
Deal found 3/12£483
Last-minute flights from Heathrow to Dulles Intl
Discover last-minute flight deals from Heathrow to Dulles Intl. Data last updated 5 December 2025 and is based on user searches.
Wed 10/1206:00LHR - IAD
1 stop14h 30mMultiple Airlines
Wed 7/118:20IAD - LHR
Nonstop7h 20mMultiple Airlines
Deal found 3/12£477
Wed 24/1216:20LHR - IAD
Nonstop8h 55mLufthansa
Wed 21/122:15IAD - LHR
Nonstop7h 35mLufthansa
Deal found 3/12£471
Wed 24/1209:55LHR - IAD
2 stops36h 20mScandinavian Airlines
Wed 7/120:30IAD - LHR
2 stops19h 50mScandinavian Airlines
Deal found 4/12£474
Wed 24/1210:35LHR - IAD
2 stops35h 40mScandinavian Airlines
Wed 21/120:30IAD - LHR
1 stop16h 10mScandinavian Airlines
Deal found 3/12£477
Mon 12/110:00LHR - IAD
1 stop11h 05mVirgin Atlantic
Sun 18/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£473
Fri 16/106:40LHR - IAD
2 stops16h 50mMultiple Airlines
Mon 19/119:40IAD - LHR
3 stops20h 10mMultiple Airlines
Deal found 3/12£470
Fri 16/119:50LHR - IAD
2 stops28h 00mScandinavian Airlines
Mon 19/116:50IAD - LHR
1 stop20h 40mScandinavian Airlines
Deal found 3/12£480
Sat 17/106:30LHR - IAD
1 stop14h 05mBritish Airways
Fri 17/419:15IAD - LHR
Nonstop7h 30mBritish Airways
Deal found 3/12£474
Sat 17/108:40LHR - IAD
1 stop12h 25mVirgin Atlantic
Sat 24/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 3/12£478
Fri 23/118:40LHR - IAD
1 stop29h 10mScandinavian Airlines
Mon 26/116:50IAD - LHR
1 stop18h 10mScandinavian Airlines
Deal found 2/12£472
Fri 30/119:50LHR - IAD
2 stops28h 00mScandinavian Airlines
Mon 16/220:30IAD - LHR
2 stops14h 55mScandinavian Airlines
Deal found 4/12£468
One-way flights from Heathrow to Dulles Intl
Search for one-way flight options from Heathrow to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 5 December 2025.
Thu 29/114:50LHR - IAD
3 stops24h 29mMultiple Airlines
Deal found 3/12£429
Wed 14/113:25LHR - IAD
1 stop12h 29mAir Canada
Deal found 4/12£429
Thu 30/408:45LHR - IAD
1 stop12h 35mSWISS
Deal found 3/12£430
Mon 19/116:20LHR - IAD
Nonstop8h 55mAustrian Airlines
Deal found 5/12£431
Mon 12/120:35LHR - IAD
1 stop26h 55mIcelandair
Deal found 4/12£432
Mon 9/311:10LHR - IAD
2 stops14h 13mAir Canada
Deal found 2/12£432
Sat 13/1220:50LHR - IAD
2 stops29h 10mMultiple Airlines
Deal found 3/12£434
Tue 16/1208:15LHR - IAD
3 stops35h 14mMultiple Airlines
Deal found 3/12£435
Sun 18/106:50LHR - IAD
2 stops19h 04mAir Canada
Deal found 4/12£436
Tue 10/220:50LHR - IAD
3 stops25h 25mMultiple Airlines
Deal found 4/12£438
Thu 22/112:05LHR - IAD
Nonstop8h 50mLufthansa
Deal found 2/12£439
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 5 December 2025.
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 5 December 2025.
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
Fri 30/1
19:50-18:50
2 stops28h 00m
Washington, D.C. Dulles Intl
Mon 16/2
20:30-16:25
2 stops14h 55m
£468
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 19/3
10:20-18:15
1 stop11h 55m
Washington, D.C. Dulles Intl
Wed 1/4
20:20-16:00
1 stop14h 40m
£477
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Wed 15/4
07:05-16:50
2 stops14h 45m
Washington, D.C. Dulles Intl
Wed 29/4
20:20-18:50
2 stops17h 30m
£480
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Wed 4/3
10:00-16:05
1 stop11h 05m
Washington, D.C. Dulles Intl
Wed 11/3
23:20-10:50
Nonstop7h 30m
£487
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Tue 10/2
08:25-16:30
1 stop13h 05m
Washington, D.C. Dulles Intl
Fri 20/2
16:40-12:00
1 stop14h 20m
£488
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Fri 23/1
18:40-18:50
1 stop29h 10m
Washington, D.C. Dulles Intl
Mon 26/1
16:50-17:40
1 stop19h 50m
£492
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 19/3
16:25-20:55
Nonstop8h 30m
Washington, D.C. Dulles Intl
Mon 30/3
22:20-10:45
Nonstop7h 25m
£499
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Tue 17/2
12:10-15:35
Nonstop8h 25m
Washington, D.C. Dulles Intl
Thu 26/2
18:20-06:30
Nonstop7h 10m
£499
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 19/3
16:25-20:55
Nonstop8h 30m
Washington, D.C. Dulles Intl
Wed 1/4
17:40-06:20
Nonstop7h 40m
£499
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 19/3
16:25-20:55
Nonstop8h 30m
Washington, D.C. Dulles Intl
Wed 1/4
14:03-06:55
1 stop11h 52m
£499
Flights are sorted by cheapest return flights first.
Deals found on 4/12
Showing 1-10 of 23 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
Prices
Airlines
Delays
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 28 November 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 74 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 £380). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £537). 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 5 December 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 15% 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 29 November 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 5 December 2025.
The most flights from LHR to IAD are scheduled on a Tuesday (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 on average).
How often are flights from London to Washington, D.C. delayed?
About 18% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 132 minutes.
What is the most punctual flight time for London to Washington, D.C. flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Washington, D.C. flights?
Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 10% of flights being delayed.
What’s the top stopover airport for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Share of one-stop return flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Dublin (DUB) – chosen by Cheapflights users on 35% of one-stop itineraries from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on Cheapflights.
What’s the cheapest stopover airport for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Average return fare for one-stop flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Zurich (ZRH) is the most affordable one-stop option, with an average return flight price of £458.
What’s the fastest stopover option from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 11h 25m.
Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Average stopover duration for one-stop one-way flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Zurich (ZRH) offer the fastest connection on this route, with an average stopover time of 1h 13m.
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 5 December 2025.
Read reviews from past customers who have flown with Virgin Atlantic, Air France, 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.
The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
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 Scandinavian Airlines fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in about 28h. The time it takes to get you to your destination can typically vary by up to . There are 3664 mi between London Heathrow Airport and Washington, D.C. Dulles Intl Airport.
What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at £190, 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 TAP AIR PORTUGAL and Icelandair - these airlines can fly you to your destination from £351 and £374, respectively. Delta is currently priced 67% 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 £328 on Icelandair. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £371 and Aer Lingus from £388 one-way.
What are the most reliable airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Consider KLM (94%), Air France (93%) or Delta (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 £1,389 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £460 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 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 £16.
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 £380). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £537). 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.
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
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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 5 December 2025.
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 December 2025.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 5 December 2025.
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 5 December 2025.
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.
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