$533 Cheap Flights from London (LHR) to Washington (IAD)

View $533 flight on Wed, Feb 18, 2026Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from London to Washington (LHR-IAD)

Prices were available within the past 7 days and start at $533 for one-way flights and $470 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Wed, Dec 24 - Sun, Jan 11
LHR
London
IAD
Washington
$470 Roundtrip, found 2 days ago
$470
Roundtrip
found 2 days ago
Select Swiss International Air Lines flight, departing Wed, Dec 24 from London to Washington, returning Sun, Jan 11, priced at $470 found 2 days ago
Lufthansa
Wed, Dec 24 - Sun, Jan 11
LHR
London
IAD
Washington
$473 Roundtrip, found 2 days ago
$473
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Dec 24 from London to Washington, returning Sun, Jan 11, priced at $473 found 2 days ago
Iberia
Thu, Jan 15 - Mon, Jan 19
LHR
London
IAD
Washington
$539 Roundtrip, found 11 hours ago
$539
Roundtrip
found 11 hours ago
Select Iberia flight, departing Thu, Jan 15 from London to Washington, returning Mon, Jan 19, priced at $539 found 11 hours ago
American Airlines
Thu, Jan 15 - Mon, Jan 19
LHR
London
IAD
Washington
$559 Roundtrip, found 11 hours ago
$559
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Thu, Jan 15 from London to Washington, returning Mon, Jan 19, priced at $559 found 11 hours ago
British Airways
Wed, Dec 24 - Sun, Jan 11
LHR
London
IAD
Washington
$567 Roundtrip, found 2 days ago
$567
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Dec 24 from London to Washington, returning Sun, Jan 11, priced at $567 found 2 days ago
TAP Portugal
Fri, Jan 16 - Sun, Jan 25
LHR
London
IAD
Washington
$571 Roundtrip, just found
$571
Roundtrip
just found
Select TAP Portugal flight, departing Fri, Jan 16 from London to Washington, returning Sun, Jan 25, priced at $571 just found
Icelandair
Tue, May 5 - Fri, May 15
LHR
London
IAD
Washington
$577 Roundtrip, found 1 day ago
$577
Roundtrip
found 1 day ago
Select Icelandair flight, departing Tue, May 5 from London to Washington, returning Fri, May 15, priced at $577 found 1 day ago
United
Wed, Dec 10 - Wed, Jan 14
LHR
London
IAD
Washington
$597 Roundtrip, found 1 day ago
$597
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 10 from London to Washington, returning Wed, Jan 14, priced at $597 found 1 day ago
Air Canada
Wed, Dec 24 - Tue, Jan 6
LHR
London
IAD
Washington
$599 Roundtrip, found 2 days ago
$599
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 24 from London to Washington, returning Tue, Jan 6, priced at $599 found 2 days ago
Scandinavian Airlines
Wed, Feb 18 - Mon, Mar 9
LHR
London
IAD
Washington
$601 Roundtrip, found 2 hours ago
$601
Roundtrip
found 2 hours ago
Select Scandinavian Airlines flight, departing Wed, Feb 18 from London to Washington, returning Mon, Mar 9, priced at $601 found 2 hours ago

Find the cheapest month to fly from London (LHR) to Washington (IAD)

February is typically the cheapest month to fly

From $463 - $777 per traveler.

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Closest option available. Average driving time to city center is 8 minutes. Flights from $773
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $773
Flights from London (LHR) to Washington (IAD)
Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$469
Distance
3666 mi
Average flight time
3 hours 36 mins

London to Washington Flights

The cheapest times to fly from London to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to Washington are during the month of December. You can find some of the cheapest flights from London to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from London to Washington

Sunday is one of the best days to book for cheap flights from London to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from London to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to Washington in 2026. You can also book with separate airlines for your outbound and return journeys, from $533 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) cost?
Grab a cheap one-way flight from $533 or cheap return flight from $470 from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Flying in December may help you find better deals, as it's the cheapest month for flights between LHR and IAD. You'll typically find the lowest prices during the off-season.
Which airlines fly direct from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Avoid the layovers and travel nonstop from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) with 3 carriers, including:

  • United Airlines
  • British Airways
  • Virgin Atlantic

What is the cheapest airline that flies from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Virgin Atlantic and British Airways are some well-known airlines offering reasonable fares. Remember that flight prices from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) can change depending on travel dates, demand and how early you book. With Expedia's search tool, you can easily find a LHR to IAD flight that works with your plans and budget.
How many flights per day from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
When taking off from Heathrow Airport (LHR), you can choose from an average of 4 daily nonstop flights to Washington Dulles Intl. Airport (IAD).
What are the most popular departure times for flights from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
The 4 PM departures from LHR to IAD are the busiest. Prices can be higher for these popular slots. If you're looking to save, choose a less crowded time to fly.
What day of the week has the most flights from LHR to IAD?
Thursday offers the most flights from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD). Consider jetting off on this day and you'll have the best chance of finding a departure that fits your itinerary.
What is the earliest flight from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
The first flight of the day leaving Heathrow Airport (LHR) is at around 12:05PM UTC+0. Hop on this flight and you'll land at Washington Dulles Intl. Airport (IAD) at approximately 3:40PM UTC-5. The total time in the air is 8h 35m.
How long does it take to fly from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Flights from LHR to IAD have an average travel time of 8 hours and 34 minutes. The distance between the two airports is 3,700 mi.
What airline has the least delays from LHR to IAD?
With 91% of flights generally arriving on time, Lufthansa has the best on-time performance for direct flights from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD). To keep track of your flight status and get notifications about any changes, simply head to the Expedia App.
What is the best time to fly from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Book a flight from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Heathrow Airport (LHR)?
Take a direct flight from Heathrow Airport (LHR) to Washington and arrive at Washington Dulles Intl. Airport (IAD). Another entry point into the city is Baltimore Washington Intl. Thurgood Marshall Airport (BWI).
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute bookings from LHR to IAD are typically more expensive. To lock in the best prices, start looking for flights as soon as possible. That said, if you're flexible with your travel dates, you may find a cheap ticket right before your trip.
Is it cheaper to book a LHR to IAD flight and hotel package?
Securing a LHR to IAD flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our extensive range of stays and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
Usually, it's possible to cancel or reschedule your LHR to IAD flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

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