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Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £307

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — IAD
19 Feb — 26 Feb1
1 adult

The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or November, booked 60 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Heathrow to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 February 2025.

Round-trip from

£419

One-way from

£307

Popular in

August

Cheapest in

February

Average price

£575

Good round-trip deal

£527 or less

Good one-way deal

£579 or less
Lufthansa
  • Lufthansa
  • 8/3-8/3
  • 1 total stop
  • 25h 50m total
  • London to Washington, D.C.
22/4
  • 22/4
  • 3 total stops
  • 27h 15m total
  • London to Washington, D.C.
Highest demand for flights based on searches. 10% potential increase in price (£64 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from London Heathrow to Washington, D.C. Dulles Intl.
Price to beat on a one-way flight from London Heathrow to Washington, D.C. Dulles Intl.

Find flight deals from Heathrow to Dulles Intl

Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 February 2025.

Sat 1/312:05LHR - IAD
Nonstop8h 40mAustrian Airlines
Sat 1/317:45IAD - LHR
1 stop38h 45mAustrian Airlines
Deal found 13/2£423
Sat 8/306:30LHR - IAD
1 stop13h 10mLufthansa
Sat 8/322:20IAD - LHR
2 stops29h 10mLufthansa
Deal found 13/2£426
Fri 28/219:30LHR - IAD
1 stop25h 10mScandinavian Airlines
Mon 3/317:10IAD - LHR
2 stops18h 15mScandinavian Airlines
Deal found 13/2£452
Fri 28/220:40LHR - IAD
1 stop26h 45mIcelandair
Tue 4/319:40IAD - LHR
1 stop10h 10mIcelandair
Deal found 13/2£462
Thu 13/306:00LHR - IAD
1 stop13h 35mMultiple Airlines
Thu 20/321:45IAD - LHR
1 stop11h 15mMultiple Airlines
Deal found 13/2£489
Fri 28/209:00LHR - IAD
1 stop12h 15mVirgin Atlantic
Tue 4/318:25IAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 13/2£521
Wed 12/306:30LHR - IAD
2 stops31h 16mUnited Airlines
Wed 19/315:55IAD - LHR
1 stop11h 15mUnited Airlines
Deal found 12/2£522
Fri 28/207:50LHR - IAD
1 stop12h 50mAer Lingus
Fri 9/520:25IAD - LHR
1 stop9h 50mAer Lingus
Deal found 13/2£526
Mon 17/218:30LHR - IAD
1 stop25h 00mTAP AIR PORTUGAL
Sun 23/222:30IAD - LHR
1 stop18h 05mTAP AIR PORTUGAL
Deal found 13/2£529
Mon 28/406:00LHR - IAD
1 stop15h 15mSWISS
Tue 6/520:45IAD - LHR
1 stop11h 15mSWISS
Deal found 13/2£536
Fri 28/212:25LHR - IAD
Nonstop8h 40mAir France
Mon 3/321:20IAD - LHR
Nonstop7h 10mAir France
Deal found 13/2£545
Wed 19/208:40LHR - IAD
1 stop12h 05mDelta
Thu 27/220:40IAD - LHR
Nonstop7h 30mDelta
Deal found 12/2£552

Find flights from Heathrow to Dulles Intl within your budget

Customise your flight search to find flights from Heathrow to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 February 2025.

Fly from

Heathrow

Fly to

Dulles Intl

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 1/3

12:05-15:45

Nonstop8h 40m

Washington, D.C. Dulles Intl

Sat 1/3

17:45-13:30

1 stop38h 45m

£423

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 8/3

06:30-14:40

1 stop13h 10m

Washington, D.C. Dulles Intl

Sat 8/3

22:20-08:30

2 stops29h 10m

£426

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 28/2

19:30-15:40

1 stop25h 10m

Washington, D.C. Dulles Intl

Mon 3/3

17:10-16:25

2 stops18h 15m

£452

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 28/2

20:40-18:25

1 stop26h 45m

Washington, D.C. Dulles Intl

Tue 4/3

19:40-10:50

1 stop10h 10m

£462

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 13/3

06:00-15:35

1 stop13h 35m

Washington, D.C. Dulles Intl

Thu 20/3

21:45-13:00

1 stop11h 15m

£489

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 28/2

09:00-16:15

1 stop12h 15m

Washington, D.C. Dulles Intl

Tue 4/3

18:25-06:55

Nonstop7h 30m

£521

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 12/3

06:30-09:46

2 stops31h 16m

Washington, D.C. Dulles Intl

Wed 19/3

15:55-07:10

1 stop11h 15m

£522

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 28/2

07:50-15:40

1 stop12h 50m

Washington, D.C. Dulles Intl

Fri 9/5

20:25-11:15

1 stop9h 50m

£526

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 11/3

08:55-17:25

1 stop12h 30m

Washington, D.C. Dulles Intl

Thu 20/3

21:45-16:20

1 stop14h 35m

£534