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

LHR — IAD
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

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 2025

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 4 November 2025.

One-way from

£404

Return from

£470

Popular in

July

Cheapest in

September

Average price (all airlines)

£575
British Airways
  • British Airways
  • 24/2
  • 2 total stops
  • 22h 23m total
  • London to Washington, D.C.
British Airways
  • British Airways
  • 5/12-14/12
  • Nonstop
  • 15h 40m total
  • London to Washington, D.C.
Highest demand for flights from London Heathrow to Washington, D.C. Dulles Intl; 12% potential price increase.
Best time to find cheap flights from London Heathrow to Washington, D.C. Dulles Intl; 2% potential price drop.
Average price for all London Heathrow to Washington, D.C. Dulles Intl flights (one-way and round-trip).

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 4 November 2025.

Fri 5/1216:25LHR - IAD
Nonstop8h 30mBritish Airways
Sun 14/1218:20IAD - LHR
Nonstop7h 10mBritish Airways
Deal found 3/11£470
Wed 10/1216:25LHR - IAD
Nonstop8h 30mBritish Airways
Mon 15/1218:20IAD - LHR
Nonstop7h 10mBritish Airways
Deal found 1/11£477
Thu 4/1212:10LHR - IAD
Nonstop8h 25mBritish Airways
Sun 14/1221:45IAD - LHR
Nonstop7h 15mBritish Airways
Deal found 2/11£478

Travel insights for British Airways flights from Heathrow to Dulles Intl

Get recent, data-driven insights about British Airways flights from Heathrow to Dulles Intl including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Dulles Intl. Price data was last updated on 31 October 2025.

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 February, with an average price of £410. Conversely, traveling with British Airways from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July will be the most expensive, with an average cost of £585. 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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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 4 November 2025.

See what others are saying about British Airways

Read reviews and see what other travellers are saying about their experiences with British Airways. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing British Airways for your next flight. Reviews last updated 4 November 2025.
British Airways
6.7
Okay
7,494 reviews
Overview

Crew

7.6

Boarding

6.9

Comfort

6.7

Food

6.3

Entertainment

6.4

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