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Heathrow Airport to Dulles International Airport flight

Explore the cheapest one-way and round-trip flights from Heathrow Airport to Dulles International Airport over the next 90 days, with one-way fares from £ 289 and round-trip from £ 323. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        LHR 15:50
        8h 25m
        Direct
        IAD 19:15
        London - Washington D.C. | Thu, Oct 15 | Virgin Atlantic
        IAD 22:05
        7h 35m
        Direct
        LHR 10:40
        Washington D.C. - London | Wed, Oct 21 | Virgin Atlantic
        £ 388 £ 542
        28% off
        28% off
        £ 542 £ 388
      • LHR 13:20
        8h 40m
        Direct
        IAD 17:00
        London - Washington D.C. | Wed, Nov 18 | Virgin Atlantic
        IAD 18:55
        7h 25m
        Direct
        LHR 07:20
        Washington D.C. - London | Wed, Nov 25 | Virgin Atlantic
        £ 395 £ 542
        27% off
        27% off
        £ 542 £ 395
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Wed, Dec 2 | Icelandair
        IAD 19:40
        10h 10m
        1 stop
        LHR 10:50
        Washington D.C. - London | Tue, Dec 8 | Icelandair
        £ 323 £ 542
        40% off
        40% off
        £ 542 £ 323
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Nov 12 | Icelandair
        IAD 19:40
        18h 50m
        1 stop
        LHR 19:30
        Washington D.C. - London | Tue, Nov 17 | Icelandair
        £ 323
        40% off
        £ 542 £ 323
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Sat, Nov 28 | Icelandair
        IAD 19:40
        18h 50m
        1 stop
        LHR 19:30
        Washington D.C. - London | Fri, Dec 4 | Icelandair
        £ 323
        40% off
        £ 542 £ 323
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Fri, Nov 13 | Icelandair
        IAD 19:40
        10h 10m
        1 stop
        LHR 10:50
        Washington D.C. - London | Tue, Nov 17 | Icelandair
        £ 323
        40% off
        £ 542 £ 323
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Tue, Nov 17 | Icelandair
        IAD 19:40
        18h 50m
        1 stop
        LHR 19:30
        Washington D.C. - London | Mon, Nov 23 | Icelandair
        £ 324
        40% off
        £ 542 £ 324
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Wed, Nov 11 | Icelandair
        IAD 19:40
        10h 10m
        1 stop
        LHR 10:50
        Washington D.C. - London | Sun, Nov 15 | Icelandair
        £ 324
        40% off
        £ 542 £ 324
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Tue, Dec 8 | Icelandair
        IAD 19:40
        10h 15m
        1 stop
        LGW 10:55
        Washington D.C. - London | Sun, Dec 13 | Icelandair
        £ 326
        40% off
        £ 542 £ 326
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Nov 26 | Icelandair
        IAD 19:40
        10h 15m
        1 stop
        LGW 10:55
        Washington D.C. - London | Sun, Nov 29 | Icelandair
        £ 326
        40% off
        £ 542 £ 326
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Mon, Nov 30 | Icelandair
        IAD 19:40
        18h 50m
        1 stop
        LHR 19:30
        Washington D.C. - London | Sun, Dec 6 | Icelandair
        £ 326
        40% off
        £ 542 £ 326
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Dec 10 | Icelandair
        IAD 19:40
        18h 50m
        1 stop
        LHR 19:30
        Washington D.C. - London | Thu, Dec 17 | Icelandair
        £ 326
        40% off
        £ 542 £ 326
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Fri, Dec 4 | Icelandair
        IAD 19:40
        10h 10m
        1 stop
        LHR 10:50
        Washington D.C. - London | Fri, Dec 11 | Icelandair
        £ 326
        40% off
        £ 542 £ 326
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Sun, Nov 22 | Icelandair
        IAD 19:40
        10h 15m
        1 stop
        LGW 10:55
        Washington D.C. - London | Sun, Nov 29 | Icelandair
        £ 326
        40% off
        £ 542 £ 326
      • LON 13:00
        17h 25m
        1 stop
        WAS 14:00
        London - Washington D.C. | Tue, Oct 13 | Normal Airline
        WAS 15:00
        6h
        Direct
        LON 16:00
        Washington D.C. - London | Thu, Oct 15 | Normal Airline
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      • Cheapest nonstop
        LHR 16:25
        8h 30m
        Direct
        IAD 19:55
        London - Washington D.C. | Wed, Dec 9 | British Airways
        £ 343 £ 472
        27% off
        27% off
        £ 472 £ 343
      • LHR 12:15
        8h 25m
        Direct
        IAD 15:40
        London - Washington D.C. | Sat, Nov 28 | British Airways
        £ 344 £ 472
        27% off
        27% off
        £ 472 £ 344
      • LHR 13:05
        11h 15m
        1 stop
        IAD 19:20
        London - Washington D.C. | Wed, Oct 28 | Icelandair
        £ 289 £ 472
        39% off
        39% off
        £ 472 £ 289
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Dec 10 | Icelandair
        £ 294
        38% off
        £ 472 £ 294
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Wed, Dec 9 | Icelandair
        £ 295
        38% off
        £ 472 £ 295
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Dec 3 | Icelandair
        £ 306
        35% off
        £ 472 £ 306
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Tue, Dec 8 | Icelandair
        £ 307
        35% off
        £ 472 £ 307
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Wed, Dec 2 | Icelandair
        £ 308
        35% off
        £ 472 £ 308
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Mon, Nov 30 | Icelandair
        £ 308
        35% off
        £ 472 £ 308
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Nov 12 | Icelandair
        £ 313
        34% off
        £ 472 £ 313
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Tue, Nov 17 | Icelandair
        £ 314
        33% off
        £ 472 £ 314
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Wed, Nov 11 | Icelandair
        £ 314
        33% off
        £ 472 £ 314
      • LHR 12:15
        11h 15m
        1 stop
        IAD 18:30
        London - Washington D.C. | Sat, Nov 28 | Icelandair
        £ 323
        32% off
        £ 472 £ 323
      • LHR 20:35
        26h 55m
        1 stop
        IAD 18:30
        London - Washington D.C. | Thu, Nov 26 | Icelandair
        £ 340
        28% off
        £ 472 £ 340
      • LON 13:00
        17h 25m
        1 stop
        WAS 14:00
        London - Washington D.C. | Tue, Oct 13 | Normal Airline
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Flight fares from Heathrow Airport to Dulles International Airport are based on the average fares across airlines for the next three months, based on Trip.com’s latest data.

Trip.com Price Insights: Flights from Heathrow Airport to Dulles International Airport

What is the cheapest month to fly from Heathrow Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Heathrow Airport to Dulles International Airport for each month in the Trip.com database.

Based on Trip.com’s data from the past 12 months, if you’re looking for a low-cost one-way ticket from Heathrow Airport to Dulles International Airport, the best time to buy is in March, with an average price of £ 675. You’ll want to avoid July, when the average price can reach as high as £ 993.

£ 993
£ 834
£ 675
£ 516
    Cheapest
  • £ 723
    Oct
  • £ 737
    Nov
  • £ 735
    Dec
  • £ 721
    Jan
  • £ 765
    Feb
  • £ 675
    Mar
  • £ 749
    Apr
  • £ 735
    May
  • £ 930
    Jun
  • £ 993
    Jul
  • £ 864
    Aug
  • £ 708
    Sep

What’s the cheapest month to fly round-trip from Heathrow Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average monthly round-trip fares from Heathrow Airport to Dulles International Airport in the Trip.com database.

Based on Trip.com’s data from the past 12 months, April is typically the cheapest month to find flights from Heathrow Airport to Dulles International Airport, with an average price of £ 618. In contrast, May is usually the most expensive month, with average fares reaching £ 761.

£ 761
£ 690
£ 618
£ 547
    Cheapest
  • £ 651
    Oct
  • £ 621
    Nov
  • £ 693
    Dec
  • £ 645
    Jan
  • £ 654
    Feb
  • £ 694
    Mar
  • £ 618
    Apr
  • £ 761
    May
  • £ 738
    Jun
  • £ 714
    Jul
  • £ 659
    Aug
  • £ 638
    Sep

What is the cheapest day of the week to fly from Heathrow Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average ticket prices from Heathrow Airport to Dulles International Airport for each day of the week in the Trip.com database.

Based on Trip.com’s data from the past 12 months, the cheapest day to depart from Heathrow Airport to Dulles International Airport is Wednesday, with average fares typically lower than other days. You’ll want to avoid flying on Monday, as ticket prices are usually the highest that day.

£ 827
£ 730
£ 632
£ 535
    Cheapest
  • £ 827
    Mon
  • £ 799
    Tue
  • £ 632
    Wed
  • £ 704
    Thu
  • £ 724
    Fri
  • £ 760
    Sat
  • £ 810
    Sun

Which airline offers the cheapest flights from Heathrow Airport to Dulles International Airport?

The cheapest airline flying from Heathrow Airport to Dulles International Airport is Icelandair (from £ 289) among 10 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Icelandair
From £ 289
British Airways
From £ 343
American Airlines
From £ 345
Aer Lingus
From £ 349
Iberia
From £ 353
Finnair
From £ 356
TAP Air Portugal
From £ 359
Austrian Airlines
From £ 405
Vueling Airlines
From £ 411
Swiss Airlines
From £ 416

Find more flights and airlines

What is the flight schedule from Heathrow Airport to Dulles International Airport?

Check the schedule for flights from London to Washington D.C. and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. FI451

    Heathrow Airport

    13:05

    LHR

    3h 10m

    Direct

    15:15

    KEF

    S M T W T F S
    Search

  2. FI645

    Keflavík International Airport

    16:50

    KEF

    6h 30m

    Direct

    19:20

    IAD

    S M - W T F -

  3. IB3641

    Heathrow Airport

    06:15

    LHR

    2h 25m

    Direct

    09:40

    MAD

    S M T W T F S
    Search

  4. IB361

    Madrid Barajas Airport

    12:20

    MAD

    9h 10m

    Direct

    15:30

    IAD

    S M T W T F S

  5. FI455

    Heathrow Airport

    21:25

    LHR

    3h 10m

    Direct

    23:35

    KEF

    S M T W T F S
    Search

  6. FI645

    Keflavík International Airport

    16:50

    KEF

    6h 30m

    Direct

    19:20

    IAD

    S M - W T F -

  7. TP1351

    Heathrow Airport

    08:00

    LHR

    2h 50m

    Direct

    10:50

    LIS

    S M T W T F S
    Search

  8. TP1438

    Humberto Delgado Airport

    15:00

    LIS

    1h 20m

    Direct

    15:20

    CMN

    - M T - - F S

  9. SV374

    Casablanca Mohammed V International Airport

    19:25

    CMN

    6h 35m

    Direct

    05:00

    RUH

    - M - W T F -

  10. SV037

    King Khalid International Airport

    08:50

    RUH

    13h 55m

    Direct

    15:45

    IAD

    S - T - T - S

  11. TP1369

    Heathrow Airport

    19:50

    LHR

    2h 50m

    Direct

    22:40

    LIS

    S M T W T F S
    Search

  12. TP1438

    Humberto Delgado Airport

    15:00

    LIS

    1h 20m

    Direct

    15:20

    CMN

    - M T - - F S

  13. SV374

    Casablanca Mohammed V International Airport

    19:25

    CMN

    6h 35m

    Direct

    05:00

    RUH

    - M - W T F -

  14. SV037

    King Khalid International Airport

    08:50

    RUH

    13h 55m

    Direct

    15:45

    IAD

    S - T - T - S

  15. TP1357

    Heathrow Airport

    18:45

    LHR

    2h 50m

    Direct

    21:35

    LIS

    S M T W T F S
    Search

  16. TP1438

    Humberto Delgado Airport

    15:00

    LIS

    1h 20m

    Direct

    15:20

    CMN

    - M T - - F S

  17. SV374

    Casablanca Mohammed V International Airport

    19:25

    CMN

    6h 35m

    Direct

    05:00

    RUH

    - M - W T F -

  18. SV037

    King Khalid International Airport

    08:50

    RUH

    13h 55m

    Direct

    15:45

    IAD

    S - T - T - S
Find more flights and airlines

About Heathrow Airport and Dulles International Airport

Learn about Heathrow Airport (LHR) and Dulles International Airport (IAD) — including location, terminals, transportation, and travel tips.

Flight distance 5,907.82km
Cheapest one-way ticket price £ 289
Cheapest return ticket price £ 323

FAQs for Heathrow Airport to Dulles International Airport Flights

  • How long is the flight from Heathrow Airport to Dulles International Airport?

    Heathrow Airport to Dulles International Airport takes about 7 hours 43 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 17 daily flights from Heathrow Airport (LHR) to Dulles International Airport (IAD).
  • The earliest flight from Heathrow Airport to Dulles International Airport departs at 12:15, and the last departs at 17:05, with about 6 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Heathrow Airport (LHR) to Dulles International Airport (IAD) is quite popular. Without considering departure times or holidays, tickets cost around £ 1,087 in October, the most expensive month to book this route.
  • The earliest flight departs from Heathrow Airport (LHR) at 07:10 and arrives in Dulles International Airport (IAD) at 11:00.
  • The latest flight departs from Heathrow Airport (LHR) at 17:05 and arrives in Dulles International Airport (IAD) at 20:10.
  • British Airways is a very popular airline operating an average of 7495 flights per month.
  • One-way flights from Heathrow Airport to Dulles International Airport currently start from £ 289, and round-trip fares start from £ 323. The current lowest fare is a Icelandair flight departing on Wed, Oct 28; prices may vary depending on availability.
  • Yes. British Airways, United Airlines and Virgin Atlantic operate direct flights from Heathrow Airport to Dulles International Airport, with an average flight time of 7 hours 57 minutes, and around 42 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Heathrow Airport to Dulles International Airport is £ 795. Prices may vary depending on the departure date, airline, and availability.
  • Heathrow Airport to Dulles International Airport operates around 42 weekly flights, mainly by British Airways, United Airlines and Virgin Atlantic. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Heathrow Airport and Dulles International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

Most popular destination

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, regulatory fees, etc) with all fees confirmed before payment. Fees for baggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.