$496+ Cheap flights from Heathrow (LHR) to Dulles Intl (IAD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
Nov 23 — Nov 301
Round-trip
1 adult, Economy
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Find cheap flights from Heathrow to Dulles Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or March, booked 48 days in advance, depart on a Wednesday or Friday and return on a Wednesday
Cheap flight deals from Heathrow to Dulles Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from Heathrow to Dulles IntlExplore 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 October 24, 2026.
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 October 24, 2026.
This Flightnetwork deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:30 pm -
1 stop25h 10m
Tue 12/15:25 pm -
1 stop23h 10m
Deal found 10/19![TAP AIR PORTUGAL logo]()
$539
This Gotogate deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:35 pm -
1 stop26h 55m
Fri 12/47:40 pm -
1 stop18h 50m
Deal found 10/21![Icelandair logo]()
$540
This Gotogate deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/18:35 pm -
1 stop26h 55m
Sun 12/67:40 pm -
1 stop18h 50m
Deal found 10/21![Icelandair logo]()
$541
This Flightnetwork deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 pm -
1 stop25h 10m
Sun 12/610:30 pm -
1 stop19h 10m
Deal found 10/23![TAP AIR PORTUGAL logo]()
$542
This Gotogate deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:35 pm -
1 stop26h 55m
Thu 12/107:40 pm -
1 stop18h 50m
Deal found 10/20![Icelandair logo]()
$543
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/58:35 pm -
1 stop26h 55m
Sat 12/127:40 pm -
1 stop18h 50m
Deal found 10/21![Icelandair logo]()
$545
This oojo deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:35 pm -
1 stop26h 55m
Sun 12/137:40 pm -
1 stop10h 10m
Deal found 10/20![Icelandair logo]()
$546
This Booking.com deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:35 pm -
1 stop26h 55m
Wed 12/97:40 pm -
1 stop18h 50m
Deal found 10/22![Icelandair logo]()
$547
This Justfly.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/18:35 pm -
1 stop26h 55m
Mon 12/287:40 pm -
1 stop10h 10m
Deal found 10/24![Icelandair logo]()
$548
This Mytrip deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2412:15 pm -
1 stop11h 15m
Wed 1/67:40 pm -
1 stop10h 10m
Deal found 10/21![Icelandair logo]()
$549
This FlightHub deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:15 pm -
1 stop11h 15m
Mon 11/167:40 pm -
1 stop10h 10m
Deal found 10/22![Icelandair logo]()
$551
Best flights from Heathrow to Dulles IntlDiscover carefully curated flight deals from Heathrow to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.
Discover carefully curated flight deals from Heathrow to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2026.
This Delta deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/256:30 am -
2 stops16h 01m
Wed 1/134:00 pm -
1 stop12h 00m
Deal found 10/20![Delta logo]()
$631
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 pm -
1 stop31h 10m
Mon 12/76:20 pm -
Nonstop7h 20m
Deal found 10/24![United Airlines logo]()
$646
This KLM deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/231:20 pm -
Nonstop8h 40m
Wed 12/96:55 pm -
Nonstop7h 25m
Deal found 10/22![KLM logo]()
$654
This Austrian Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/226:00 am -
1 stop13h 10m
Sat 11/2810:15 pm -
Nonstop7h 35m
Deal found 10/24![Austrian Airlines logo]()
$666
This Lufthansa deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/174:20 pm -
Nonstop8h 55m
Tue 11/246:20 pm -
Nonstop7h 20m
Deal found 10/20![Multiple Airlines logo]()
$699
This Delta deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/181:20 pm -
Nonstop8h 40m
Tue 11/2411:37 am -
1 stop14h 28m
Deal found 10/20![Delta logo]()
$633
This United Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/167:30 am -
1 stop13h 25m
Mon 1/410:55 pm -
1 stop11h 55m
Deal found 10/19![United Airlines logo]()
$684
This Delta deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:40 am -
1 stop12h 05m
Wed 12/912:35 pm -
1 stop12h 45m
Deal found 10/19![Delta logo]()
$659
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2512:05 pm -
Nonstop8h 35m
Fri 1/810:05 am -
1 stop14h 50m
Deal found 10/22![United Airlines logo]()
$702
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/124:20 pm -
Nonstop8h 55m
Fri 1/86:20 pm -
Nonstop7h 20m
Deal found 10/24![United Airlines logo]()
$703
This Delta deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/186:30 am -
1 stop14h 25m
Tue 12/296:00 am -
1 stop19h 25m
Deal found 10/20![Delta logo]()
$736
This United Airlines deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/49:00 am -
1 stop13h 00m
Thu 12/106:05 am -
1 stop9h 30m
Deal found 10/19![United Airlines logo]()
$781
Last-minute flights from Heathrow to Dulles IntlDiscover last-minute flight deals from Heathrow to Dulles Intl. Data last updated October 24, 2026 and is based on user searches.
Discover last-minute flight deals from Heathrow to Dulles Intl. Data last updated October 24, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:35 pm -
1 stop26h 55m
Thu 12/107:40 pm -
1 stop18h 50m
Deal found 10/20![Icelandair logo]()
$543
This Gotogate deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:35 pm -
1 stop26h 55m
Fri 12/47:40 pm -
1 stop18h 50m
Deal found 10/21![Icelandair logo]()
$540
This FlightHub deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:15 pm -
1 stop11h 15m
Mon 11/167:40 pm -
1 stop10h 10m
Deal found 10/22![Icelandair logo]()
$551
This Booking.com deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:30 pm -
1 stop25h 45m
Wed 11/2510:30 pm -
1 stop19h 10m
Deal found 10/22![TAP AIR PORTUGAL logo]()
$558
This Gotogate deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:00 am -
1 stop14h 15m
Thu 11/125:25 pm -
1 stop13h 00m
Deal found 10/20![TAP AIR PORTUGAL logo]()
$561
This Flightnetwork deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:30 pm -
1 stop25h 10m
Tue 12/15:25 pm -
1 stop23h 10m
Deal found 10/19![TAP AIR PORTUGAL logo]()
$539
This Booking.com deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:30 pm -
1 stop25h 10m
Mon 11/305:25 pm -
1 stop19h 05m
Deal found 10/20![TAP AIR PORTUGAL logo]()
$557
This Trip.com deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
1 stop14h 15m
Mon 11/305:25 pm -
1 stop19h 05m
Deal found 10/20![TAP AIR PORTUGAL logo]()
$556
This Flightnetwork deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 pm -
1 stop25h 10m
Sun 12/610:30 pm -
1 stop19h 10m
Deal found 10/23![TAP AIR PORTUGAL logo]()
$542
This Gotogate deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 pm -
1 stop25h 10m
Wed 12/910:30 pm -
1 stop12h 00m
Deal found 10/21![TAP AIR PORTUGAL logo]()
$559
One-way flights from Heathrow to Dulles IntlSearch for one-way flight options from Heathrow to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.
Search for one-way flight options from Heathrow to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated October 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:40 pm -
2 stops24h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Multiple Airlines logo]()
$496
This Booking.com deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:00 am -
1 stop19h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![TAP AIR PORTUGAL logo]()
$498
This Mytrip deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:00 am -
1 stop13h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![TAP AIR PORTUGAL logo]()
$499
This Kiwi.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/68:45 pm -
3 stops26h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Multiple Airlines logo]()
$500
This Booking.com deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 pm -
1 stop25h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![TAP AIR PORTUGAL logo]()
$501
This Booking.com deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:00 am -
1 stop19h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![TAP AIR PORTUGAL logo]()
$502
This Booking.com deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/197:55 pm -
1 stop29h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![TAP AIR PORTUGAL logo]()
$503
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
2 stops33h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$506
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1312:25 pm -
3 stops35h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Multiple Airlines logo]()
$508
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 October 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $539 (Flightnetwork) |
One-way from | $496 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $712 |
Good round-trip deal | $693 or less |
Good one-way deal | $565 or less |
Cheapflights Fare Finder
Customize 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 7,457,451 searches. Data last updated October 24, 2026.
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
Fly to
Route
Depart
Return
Cheapest round-trip
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Tue 12/1
12:05 pm-5:00 pm
1 stop33h 55m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$568
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Fri 1/29
4:25 pm-7:55 pm
Nonstop8h 30m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$608
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Sun 12/13
3:45 pm-4:20 pm
1 stop29h 35m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$610
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Wed 1/6
11:10 am-8:10 pm
1 stop14h 00m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$631
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Fri 12/25
6:30 am-5:31 pm
2 stops16h 01m
Washington, D.C. Dulles Intl
Wed 1/13
4:00 pm-9:00 am
1 stop12h 00m
$631
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Wed 11/18
1:20 pm-5:00 pm
Nonstop8h 40m
Washington, D.C. Dulles Intl
Tue 11/24
11:37 am-7:05 am
1 stop14h 28m
$633
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Sat 12/5
6:00 pm-8:10 pm
1 stop31h 10m
Washington, D.C. Dulles Intl
Mon 12/7
6:20 pm-6:40 am
Nonstop7h 20m
$646
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Sat 1/9
6:35 am-8:10 pm
2 stops18h 35m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$648
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Mon 11/23
1:20 pm-5:00 pm
Nonstop8h 40m
Washington, D.C. Dulles Intl
Wed 12/9
6:55 pm-7:20 am
Nonstop7h 25m
$654
LondonWashington, D.C.
LHR London Heathrow - IAD Washington, D.C. Dulles Intl
LHRIAD
London Heathrow
Tue 11/3
8:40 am-3:45 pm
1 stop12h 05m
Washington, D.C. Dulles Intl
Wed 12/9
12:35 pm-6:20 am
1 stop12h 45m
$659
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Heathrow to Dulles Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Dulles Intl in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London Heathrow Airport-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
LHR-IAD
Estimated round-trip 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
Delays
How far ahead should I book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
The best time to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 47 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of $641). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $787). 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 October 24, 2026.
When flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from London to Washington, D.C. delayed?
About 16% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 140 minutes.
What is the most punctual flight time for London to Washington, D.C. flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday 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 last year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.
The best insider tips for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Washington, D.C. Dulles Intl Airport trip
Our travel experts
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 October 24, 2026.
See what other customers who have flown with Austrian Airlines,Virgin Atlantic, andUnited Airlines from London Heathrow Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Overall
7.5
Food
6.7
Entertainment
6.8
Boarding
7.6
Comfort
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Oct 2026
VIE - IAD
Crew
8.1
Overall
7.5
Food
6.7
Entertainment
6.8
Boarding
7.6
Comfort
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Oct 2026
VIE - IAD
Crew
8.1
Overall
7.5
Food
6.7
Entertainment
6.8
Boarding
7.6
Comfort
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Oct 2026
VIE - IAD
Crew
8.1
Overall
7.5
Food
6.7
Entertainment
6.8
Boarding
7.6
Comfort
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Oct 2026
VIE - IAD
Crew
8.1
Overall
7.5
Food
6.7
Entertainment
6.8
Boarding
7.6
Comfort
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Oct 2026
VIE - IAD
Crew
8.1
Overall
7.5
Food
6.7
Entertainment
6.8
Boarding
7.6
Comfort
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Oct 2026
VIE - IAD
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.
Traveling 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 locationsAlexandria
Chantilly
Woodbridge
Arlington
Owings Mills
Lanham
Sterling
Reston
Herndon
Hyattsville
Rockville
Springfield
Fredericksburg
Falls Church
Tysons
Towson
Oxon Hill
Laurel
Clinton
Hunt Valley
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Other flights to Dulles Intl
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 24, 2026.
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Heathrow and Dulles Intl flights
Browse other Heathrow and Dulles Intl flight options. Last updated on October 24, 2026.
Other flights from Heathrow
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on October 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated October 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$528 | Average$831 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$544 | Average$810 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$556 | Average$740 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$566 | Average$689 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$567 | Average$750 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$581 | Average$754 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$581 | Average$872 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$582 | Average$730 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$583 | Average$836 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$658 | Average$783 | FlexibilityNo cancel fee | On-timeN/A |