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

LON — IAD
13 Aug — 20 Aug1
1 adult
1 adult, Economy, 0 bags

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Cheapest British Airways flights from London to Dulles Intl
Explore the most affordable British Airways flight options available from London to Dulles Intl. Find the lowest fares with prices last updated on 14 July 2026.

Tue 25/811:30
LHR
-
IAD
1 stop12h 20m
British Airways
Mon 21/922:25
IAD
-
LHR
Nonstop7h 25m
British Airways
Deal found 9/7£486
Thu 27/817:05
LHR
-
IAD
Nonstop8h 15m
British Airways
Thu 3/922:25
IAD
-
LHR
Nonstop7h 25m
British Airways
Deal found 9/7£495
Wed 26/812:35
LHR
-
IAD
Nonstop8h 20m
British Airways
Sat 5/917:45
IAD
-
LHR
Nonstop7h 35m
British Airways
Deal found 11/7£496

  • How do most travelers feel about British Airways?

    When planning your LON-IAD trip, keep in mind that British Airways is typically rated 6.7/10. This rating comes from 8,113 reviews by Cheapflights users who have traveled with British Airways.

  • Can I get a flight from London to Washington, D.C. Dulles Intl Airport on British Airways for under £598?

    Cheapflights currently has 31 LON-IAD flights for under £598. Flights to Washington, D.C. Dulles Intl Airport will vary based on many factors, like date and time. Click here to find the best price for your dates on Cheapflights.

British Airways flights from London to Dulles Intl in 2026

Find detailed information about British Airways flights from London to Dulles Intl. Explore the options provided by British Airways to plan your journey from London to Dulles Intl. Data last updated 14 July 2026.

One-way from

£330

Return from

£477

Popular in

August

Cheapest in

September

Average price (all airlines)

£570
British Airways
  • British Airways
  • 1/10
  • Nonstop
  • 8h 20m total
  • London to Washington, D.C.
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British Airways
  • British Airways
  • 29/9-4/10
  • 1 total stop
  • 19h 50m total
  • London to Washington, D.C.
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Highest demand for flights from London to Washington, D.C. Dulles Intl; 0% potential price increase.
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Best time to find cheap flights from London to Washington, D.C. Dulles Intl; 0% potential price drop.
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Average price for all London to Washington, D.C. Dulles Intl flights (one-way and round-trip).
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Which month is the cheapest to fly Economy class from London to Washington, D.C. Dulles Intl Airport?

For Economy class flights, the cheapest month to fly this route is September. The most expensive months are December and August.

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

The most British Airways flights from LON to IAD are scheduled on a Monday (3 on average). You will have fewer British Airways flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

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.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

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).

When is the best time to book a flight to Washington, D.C. Dulles Intl Airport with British Airways?

The best time to book a flight to Washington, D.C. Dulles Intl Airport with British Airways is 8 days before departure. On average, fares are higher if you book 3 days before departure.

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London 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 London 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 14 July 2026.
Virgin Atlantic flights from London to Washington, D.C. Dulles Intl

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 14 July 2026.
British Airways
6.7
Okay
8,115 reviews
Check prices
Overview

Crew

7.7

Boarding

6.9

Entertainment

6.5

Comfort

6.8

Food

6.4

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