Weekly British Airways flight availability from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

The most British Airways flights from LHR to IAD are scheduled on a Wednesday (2 on average). You will have fewer British Airways flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

£415+ British Airways Flights from Heathrow to Dulles Intl

Cheapflights users flying from London to Washington, D.C. on British Airways typically fly into Washington, D.C. Dulles Intl and depart from London Heathrow. Select your dates above for pricing.

British Airways flights from Heathrow to Dulles Intl in 2026

One-way from	£431
Return from	£414
Popular in	July
Cheapest in	September
Average price (all airlines)	£517

British Airways
5/5
Nonstop
8h 15m total
London to Washington, D.C.

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British Airways
24/3-23/6
2 total stops
23h 50m total
London to Washington, D.C.

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Highest demand for flights from London Heathrow to Washington, D.C. Dulles Intl; 13% potential price increase.

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Best time to find cheap flights from London Heathrow to Washington, D.C. Dulles Intl; 2% potential price drop.

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Average price for all London Heathrow to Washington, D.C. Dulles Intl flights (one-way and round-trip).

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Can I get a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on British Airways for under £521?
British Airways offers 11 flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport for under £521. Prices vary by date and time. To see all prices and select your dates, click here.

Find British Airways flight deals from Heathrow to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest British Airways flights from Heathrow to Dulles Intl
Explore the most affordable British Airways flight options available from Heathrow to Dulles Intl. Find the lowest fares with prices last updated on 9 January 2026.

Thu 5/208:50LHR - IAD

1 stop11h 45mBritish Airways

Thu 12/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£415

Tue 3/208:50LHR - IAD

1 stop11h 45mBritish Airways

Tue 10/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£417

Fri 13/207:50LHR - IAD

1 stop12h 45mBritish Airways

Mon 23/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£424

Best British Airways flights from Heathrow to Dulles Intl
Discover carefully curated British Airways 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 9 January 2026.

Fri 6/208:50LHR - IAD

1 stop11h 45mBritish Airways

Thu 19/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 9/1£415

Wed 3/607:50LHR - IAD

1 stop12h 40mBritish Airways

Thu 25/617:40IAD - LHR

Nonstop7h 40mBritish Airways

Deal found 8/1£417

Fri 13/207:50LHR - IAD

1 stop12h 45mBritish Airways

Mon 23/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£424

Direct British Airways flights from Heathrow to Dulles Intl
Explore direct British Airways flight options from Heathrow to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 9 January 2026.

Thu 30/412:35LHR - IAD

Nonstop8h 15mBritish Airways

Tue 5/522:25IAD - LHR

Nonstop7h 25mBritish Airways

Deal found 9/1£420

Wed 1/412:35LHR - IAD

Nonstop8h 15mBritish Airways

Sun 5/419:15IAD - LHR

Nonstop7h 30mBritish Airways

Deal found 8/1£421

Fri 12/614:00LHR - IAD

Nonstop8h 25mBritish Airways

Sun 21/619:15IAD - LHR

Nonstop7h 30mBritish Airways

Deal found 8/1£422

Last-minute British Airways flights from Heathrow to Dulles Intl
Discover last-minute British Airways flight deals from Heathrow to Dulles Intl. Data last updated 9 January 2026 and is based on user searches.

Thu 5/208:50LHR - IAD

1 stop11h 45mBritish Airways

Thu 12/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£415

Tue 3/208:50LHR - IAD

1 stop11h 45mBritish Airways

Tue 10/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£417

Fri 13/207:50LHR - IAD

1 stop12h 45mBritish Airways

Mon 23/218:20IAD - LHR

Nonstop7h 10mBritish Airways

Deal found 8/1£424

One-way British Airways flights to Dulles Intl
Search for one-way British Airways flight options to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 9 January 2026.

Tue 5/512:35LHR - IAD

Nonstop8h 15mBritish Airways

Deal found 7/1£431

Tue 17/312:10LHR - IAD

Nonstop8h 25mBritish Airways

Deal found 8/1£431

Thu 26/216:25LHR - IAD

Nonstop8h 30mBritish Airways

Deal found 8/1£433

Prices

Airlines

How far ahead should I book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with British Airways?

Booking with British Airways 74 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with British Airways?

Currently, the most affordable month to book a British Airways flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in September, with an average price of £405. Conversely, traveling with British Airways from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in August will be the most expensive, with an average cost of £485. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

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.

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See what others are saying about British Airways

British Airways

6.7

Okay

7,659 reviews

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Overview

Recent reviews

2.0

Poor|Dec 2025

Jain vegetarian food was bad

8.0

Very Good|Dec 2025

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

10.0

Wonderful|Nov 2025

It was great. No negative feedback.

10.0

Wonderful|Nov 2025

Food and presentation were excellent. Staff was very courteous. On time boarding, on time flight. Comfortable seats (lie flats) and clear announcements and updates.

10.0

Wonderful|Nov 2025

Seats were comfortable for economy. Blanket and pillow provided, same as headphones. For some reason the uk plug wouldn’t charge and had to use the US charger. Also couldn’t use WiFi as keep saying BA club pw was wrong although it wasn’t: but minor things. Overall good flight and attentive crew.

1 out of 2553

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British Airways flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (LHR - IAD)

Cheapflights users flying from London to Washington, D.C. on British Airways typically fly into Washington, D.C. Dulles Intl and depart from London Heathrow. Select your dates above for pricing.

British Airways flights from Heathrow to Dulles Intl in 2026

Find detailed information about British Airways flights from Heathrow to Dulles Intl. Explore the options provided by British Airways to plan your journey from Heathrow to Dulles Intl. Data last updated 9 January 2026.

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

Can I get a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on British Airways for under £521?

Find British Airways flight deals from Heathrow to Dulles Intl

Cheapest British Airways flights from Heathrow to Dulles IntlExplore the most affordable British Airways flight options available from Heathrow to Dulles Intl. Find the lowest fares with prices last updated on 9 January 2026.

Explore the most affordable British Airways flight options available from Heathrow to Dulles Intl. Find the lowest fares with prices last updated on 9 January 2026.

How far ahead should I book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with British Airways?

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with British Airways?

Weekly British Airways flight availability from London Heathrow Airport to Washington, D.C. Dulles Intl Airport

Rainfall in Dulles Intl by month

Temperature in Dulles Intl by month

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.

Browse thousands of different options on Cheapflights for your next trip

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Fly from Heathrow to Dulles Intl on another airline

Consider alternative airlines that service the Dulles Intl area. Flight routes are based on user searches made on Cheapflights and were last updated on 9 January 2026.

See what others are saying about British Airways

Overview

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Cheapest British Airways flights from Heathrow to Dulles Intl
Explore the most affordable British Airways flight options available from Heathrow to Dulles Intl. Find the lowest fares with prices last updated on 9 January 2026.