Cheap flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from £276
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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
11 Jan — 18 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to London Heathrow are usually found in August or September, booked 45 days in advance, depart on a Wednesday or Tuesday and return on a Thursday
Cheap flight deals from Dulles Intl to Heathrow
Enter your travel dates to find the best prices.
Cheapest flights from Dulles Intl to Heathrow
Explore the most affordable flight options available from Dulles Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.
Wed 31/1217:31IAD - LHR
1 stop12h 44mMultiple Airlines
Wed 14/107:30LHR - IAD
1 stop12h 05mMultiple Airlines
Deal found 10/12£429
Wed 31/1218:00IAD - LHR
1 stop17h 50mLufthansa
Wed 14/107:40LHR - IAD
1 stop12h 55mLufthansa
Deal found 11/12£444
Tue 30/1222:08IAD - LHR
1 stop30h 12mUnited Airlines
Tue 13/109:00LHR - IAD
1 stop12h 40mUnited Airlines
Deal found 10/12£452
Tue 30/1222:08IAD - LHR
1 stop30h 12mAir Canada
Tue 13/106:50LHR - IAD
2 stops33h 45mAir Canada
Deal found 11/12£454
Wed 31/1217:06IAD - LHR
1 stop11h 14mDelta
Thu 15/108:40LHR - IAD
1 stop12h 25mDelta
Deal found 10/12£456
Wed 31/1213:15IAD - LHR
1 stop12h 55mAir Canada
Wed 14/106:50LHR - IAD
2 stops14h 34mAir Canada
Deal found 11/12£456
Wed 31/1221:45IAD - LHR
Nonstop7h 15mBritish Airways
Wed 14/112:10LHR - IAD
Nonstop8h 25mBritish Airways
Deal found 11/12£457
Mon 29/1212:35IAD - LHR
2 stops27h 00mAir Canada
Tue 13/106:50LHR - IAD
2 stops19h 04mAir Canada
Deal found 11/12£460
Wed 31/1217:31IAD - LHR
1 stop12h 44mAustrian Airlines
Tue 13/119:25LHR - IAD
1 stop24h 15mAustrian Airlines
Deal found 10/12£466
Tue 30/1218:20IAD - LHR
Nonstop7h 20mMultiple Airlines
Tue 13/109:00LHR - IAD
1 stop12h 40mMultiple Airlines
Deal found 11/12£468
Tue 30/1217:31IAD - LHR
1 stop31h 24mAustrian Airlines
Tue 13/119:25LHR - IAD
1 stop24h 15mAustrian Airlines
Deal found 10/12£470
Best flights from Dulles Intl to Heathrow
Discover carefully curated flight deals from Dulles Intl to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 December 2025.
Mon 19/112:23IAD - LHR
2 stops22h 37mScandinavian Airlines
Sun 25/119:50LHR - IAD
2 stops24h 30mScandinavian Airlines
Deal found 11/12£429
Tue 30/1218:20IAD - LHR
Nonstop7h 20mUnited Airlines
Tue 13/109:00LHR - IAD
1 stop12h 40mUnited Airlines
Deal found 11/12£452
Wed 21/122:20IAD - LHR
Nonstop7h 30mKLM
Tue 27/110:00LHR - IAD
1 stop11h 05mKLM
Deal found 11/12£457
Tue 24/313:19IAD - LHR
2 stops22h 41mScandinavian Airlines
Tue 7/419:50LHR - IAD
2 stops26h 00mScandinavian Airlines
Deal found 10/12£441
Tue 10/323:15IAD - LHR
Nonstop7h 35mUnited Airlines
Thu 19/306:35LHR - IAD
1 stop14h 00mUnited Airlines
Deal found 11/12£458
Fri 6/212:23IAD - LHR
2 stops22h 37mScandinavian Airlines
Mon 2/319:30LHR - IAD
2 stops28h 39mScandinavian Airlines
Deal found 11/12£449
Fri 23/118:05IAD - LHR
Nonstop7h 35mUnited Airlines
Mon 26/106:50LHR - IAD
1 stop12h 45mUnited Airlines
Deal found 11/12£458
Tue 21/412:30IAD - LHR
2 stops22h 55mScandinavian Airlines
Sat 2/510:20LHR - IAD
1 stop11h 30mScandinavian Airlines
Deal found 11/12£456
Fri 9/118:20IAD - LHR
Nonstop7h 20mUnited Airlines
Fri 16/113:45LHR - IAD
1 stop31h 55mUnited Airlines
Deal found 11/12£458
Wed 14/118:20IAD - LHR
Nonstop7h 20mUnited Airlines
Tue 27/109:00LHR - IAD
1 stop12h 40mUnited Airlines
Deal found 10/12£458
Mon 16/319:20IAD - LHR
Nonstop7h 20mUnited Airlines
Wed 25/311:10LHR - IAD
1 stop13h 55mUnited Airlines
Deal found 11/12£458
Thu 12/218:20IAD - LHR
Nonstop7h 20mUnited Airlines
Tue 17/206:50LHR - IAD
1 stop12h 45mUnited Airlines
Deal found 11/12£458
Direct flights from Dulles Intl to Heathrow
Explore direct flight options from Dulles Intl to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 December 2025.
Thu 8/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Wed 14/116:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 10/12£453
Sat 24/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Sat 31/116:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 10/12£453
Tue 30/1221:45IAD - LHR
Nonstop7h 15mBritish Airways
Tue 13/112:10LHR - IAD
Nonstop8h 25mBritish Airways
Deal found 12/12£457
Thu 22/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Thu 29/116:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 11/12£458
Fri 9/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Fri 16/116:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 12/12£459
Fri 9/118:20IAD - LHR
Nonstop7h 10mBritish Airways
Wed 14/116:25LHR - IAD
Nonstop8h 30mBritish Airways
Deal found 12/12£462
Wed 21/122:20IAD - LHR
Nonstop7h 30mVirgin Atlantic
Tue 27/116:50LHR - IAD
Nonstop8h 40mVirgin Atlantic
Deal found 11/12£463
Wed 4/318:20IAD - LHR
Nonstop7h 10mBritish Airways
Sun 8/316:25LHR - IAD
Nonstop8h 30mBritish Airways
Deal found 10/12£466
Tue 12/518:25IAD - LHR
Nonstop7h 30mAustrian Airlines
Thu 21/516:40LHR - IAD
Nonstop8h 40mAustrian Airlines
Deal found 11/12£468
Last-minute flights from Dulles Intl to Heathrow
Discover last-minute flight deals from Dulles Intl to Heathrow. Data last updated 12 December 2025 and is based on user searches.
Thu 8/117:17IAD - LHR
1 stop12h 58mMultiple Airlines
Thu 15/113:30LHR - IAD
1 stop11h 45mMultiple Airlines
Deal found 12/12£434
Fri 9/119:40IAD - LHR
1 stop10h 10mIcelandair
Sun 18/112:15LHR - IAD
1 stop11h 15mIcelandair
Deal found 10/12£432
Sat 10/112:23IAD - LHR
2 stops15h 57mScandinavian Airlines
Mon 12/107:05LHR - IAD
2 stops15h 10mScandinavian Airlines
Deal found 11/12£427
Sat 10/112:23IAD - LHR
2 stops22h 37mScandinavian Airlines
Sun 25/118:40LHR - IAD
1 stop25h 40mScandinavian Airlines
Deal found 11/12£436
Mon 12/112:23IAD - LHR
2 stops15h 57mScandinavian Airlines
Sun 25/119:50LHR - IAD
2 stops24h 30mScandinavian Airlines
Deal found 9/12£430
Fri 16/117:17IAD - LHR
1 stop12h 58mAustrian Airlines
Mon 19/106:00LHR - IAD
1 stop13h 40mAustrian Airlines
Deal found 10/12£437
Sat 17/120:30IAD - LHR
2 stops14h 55mScandinavian Airlines
Fri 23/119:50LHR - IAD
2 stops28h 00mScandinavian Airlines
Deal found 10/12£426
Sat 17/120:30IAD - LHR
1 stop16h 10mScandinavian Airlines
Tue 20/119:30LHR - IAD
1 stop26h 45mScandinavian Airlines
Deal found 11/12£429
Mon 19/116:50IAD - LHR
1 stop20h 40mScandinavian Airlines
Thu 5/210:20LHR - IAD
1 stop11h 55mScandinavian Airlines
Deal found 9/12£435
Fri 23/112:23IAD - LHR
2 stops22h 37mScandinavian Airlines
Sun 25/110:20LHR - IAD
1 stop34h 00mScandinavian Airlines
Deal found 11/12£438
Sat 24/112:23IAD - LHR
2 stops15h 57mScandinavian Airlines
Sat 31/106:40LHR - IAD
2 stops17h 10mScandinavian Airlines
Deal found 11/12£429
Sat 24/120:30IAD - LHR
2 stops14h 55mScandinavian Airlines
Tue 3/221:05LHR - IAD
2 stops25h 10mScandinavian Airlines
Deal found 11/12£435
One-way flights from Dulles Intl to Heathrow
Search for one-way flight options from Dulles Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 December 2025.
Fri 16/122:30IAD - LHR
1 stop15h 25mTAP AIR PORTUGAL
Deal found 11/12£276
Sat 7/217:30IAD - LHR
1 stop12h 55mTAP AIR PORTUGAL
Deal found 10/12£277
Thu 8/117:30IAD - LHR
1 stop14h 10mTAP AIR PORTUGAL
Deal found 9/12£278
Wed 31/1217:31IAD - LHR
1 stop12h 44mAustrian Airlines
Deal found 10/12£279
Wed 7/118:20IAD - LHR
Nonstop7h 20mAustrian Airlines
Deal found 10/12£279
Tue 30/1219:40IAD - LHR
1 stop10h 10mIcelandair
Deal found 12/12£280
Tue 5/522:25IAD - LHR
Nonstop7h 25mBritish Airways
Deal found 11/12£281
Tue 5/512:43IAD - LHR
2 stops15h 57mITA Airways
Deal found 11/12£282
Tue 6/117:17IAD - LHR
1 stop31h 38mAustrian Airlines
Deal found 11/12£282
Mon 27/422:35IAD - LHR
1 stop18h 25mTAP AIR PORTUGAL
Deal found 12/12£283
Sun 11/119:40IAD - LHR
3 stops19h 15mMultiple Airlines
Deal found 10/12£285
Find flight deals from Dulles Intl to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Heathrow (LHR). 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 12 December 2025.
Customise your flight search to find flights from Dulles Intl to Heathrow 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 12 December 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport that are best for you.
Fly from
Dulles Intl
Fly to
Heathrow
Route
Depart
Return
Price
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Mon 19/1
12:23-16:00
2 stops22h 37m
London Heathrow
Sun 25/1
19:50-15:20
2 stops24h 30m
£429
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Tue 24/3
13:19-16:00
2 stops22h 41m
London Heathrow
Tue 7/4
19:50-16:50
2 stops26h 00m
£441
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Fri 6/2
12:23-16:00
2 stops22h 37m
London Heathrow
Mon 2/3
19:30-19:09
2 stops28h 39m
£449
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Tue 30/12
18:20-06:40
Nonstop7h 20m
London Heathrow
Tue 13/1
09:00-16:40
1 stop12h 40m
£452
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Tue 21/4
12:30-16:25
2 stops22h 55m
London Heathrow
Sat 2/5
10:20-16:50
1 stop11h 30m
£456
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Wed 21/1
22:20-10:50
Nonstop7h 30m
London Heathrow
Tue 27/1
10:00-16:05
1 stop11h 05m
£457
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Tue 10/3
23:15-10:50
Nonstop7h 35m
London Heathrow
Thu 19/3
06:35-16:35
1 stop14h 00m
£458
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Fri 23/1
18:05-06:40
Nonstop7h 35m
London Heathrow
Mon 26/1
06:50-14:35
1 stop12h 45m
£458
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Fri 9/1
18:20-06:40
Nonstop7h 20m
London Heathrow
Fri 16/1
13:45-16:40
1 stop31h 55m
£458
Washington, D.C.London
IAD - LHR
IADLHR
Washington, D.C. Dulles Intl
Wed 14/1
18:20-06:40
Nonstop7h 20m
London Heathrow
Tue 27/1
09:00-16:40
1 stop12h 40m
£458
Flights are sorted by cheapest return flights first.
Deals found on 12/12
Showing 1-10 of 24 results
1
2
3
Best time to book a flight from Dulles Intl to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to London Heathrow Airport
Prices
Airlines
Delays
More
How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from Dulles Intl to Heathrow. Price data was last updated on 5 December 2025.
The price you pay for your flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 45 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £325). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £556). 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 IAD to LHR?
Find hourly flight availability from Dulles Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport as you normally would.
Weekly flight availability from Washington, D.C. Dulles Intl Airport to London Heathrow Airport
Explore weekly flight availability from Dulles Intl to Heathrow. 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 12 December 2025.
The most flights from IAD to LHR 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 (18 on average).
How often are flights from Washington, D.C. to London delayed?
About 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 159 minutes.
What is the most punctual flight time for Washington, D.C. to London 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 Saturday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Washington, D.C. to London flights?
Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 15% of flights being delayed.
What’s the top stopover airport for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Share of one-stop return flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 50% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to London Heathrow Airport on Cheapflights.
What’s the cheapest stopover airport for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Average return fare for one-stop flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £335.
What’s the fastest stopover option from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 9h 25m.
Which airport typically offers the quickest stopover for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Average stopover duration for one-stop one-way flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 35m.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 12 December 2025.
Check out reviews from past customers who have flown with Virgin Atlantic, United Airlines, andIberia from Washington, D.C. Dulles Intl Airport to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up 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 Dulles Intl to Heathrow. 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 Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
There are many flights that can get you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in 7h 20m. Fly via Scandinavian Airlines or United Airlines to get the fastest option. Airlines will cover a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport round-trip?
Currently priced at £310, Lufthansa will fly you from Washington, D.C. Dulles Intl Airport to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and Virgin Atlantic - these airlines can fly you to your destination from £369 and £383, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport for 44% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport one-way?
For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as £159. Users have also found prices from £262 and £267 on Virgin Atlantic and British Airways, respectively.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Before booking your flight to London Heathrow Airport from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: Air France (90%), Delta (90%), Virgin Atlantic( 90%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
On average you can expect to pay £563 for a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport. The cheapest flight overall is £287 while the most popular route, (Washington, D.C. Dulles Intl - London Heathrow) is currently priced at £316.
Can I find deals for business class flights from Dulles Intl to Heathrow?
Yes. Cheapflights offers flight deals from Dulles Intl to Heathrow 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 Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport (average of £325). Flying from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £556). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 December 2025.
Top 7 airlines flying from Dulles Intl to Heathrow
Discover the top 7 airlines that operate flights from Dulles Intl to Heathrow. 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 12 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 Dulles Intl to Heathrow?
Deals for Dulles Intl to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Heathrow?
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 Dulles Intl to Heathrow.
Can Cheapflights find flights from Dulles Intl to Heathrow with no change fees?
Need flexible booking options for your flight to Heathrow from Dulles Intl? 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 Dulles Intl to Heathrow become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.