$640 Cheap flights from Heathrow to Washington Dulles Intl. (LHR to IAD)

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Find The Best Dates To Fly from Heathrow to Washington Dulles Intl.

Amazing LHR to IAD Flight Deals

The cheapest flights to Washington Dulles Intl. found within the past 7 days were $542 round trip and $640 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Apr 23 - Mon, Apr 28
LHR
London
IAD
Washington
$542 Roundtrip, found 2 days ago
$542
Roundtrip
found 2 days ago
Select Icelandair flight, departing Wed, Apr 23 from London to Washington, returning Mon, Apr 28, priced at $542 found 2 days ago
Mon, Feb 10 - Thu, Feb 20
LHR
London
IAD
Washington
$607 Roundtrip, found 5 days ago
$607
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Mon, Feb 10 from London to Washington, returning Thu, Feb 20, priced at $607 found 5 days ago
Wed, Jan 22 - Wed, Jan 29
LHR
London
IAD
Washington
$609 Roundtrip, found 1 day ago
$609
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Wed, Jan 22 from London to Washington, returning Wed, Jan 29, priced at $609 found 1 day ago
Wed, Mar 19 - Wed, Mar 26
LHR
London
IAD
Washington
$611 Roundtrip, found 1 day ago
$611
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Mar 19 from London to Washington, returning Wed, Mar 26, priced at $611 found 1 day ago
Mon, Jan 20 - Thu, Apr 3
LHR
London
IAD
Washington
$619 Roundtrip, found 1 day ago
$619
Roundtrip
found 1 day ago
Select Brussels Airlines flight, departing Mon, Jan 20 from London to Washington, returning Thu, Apr 3, priced at $619 found 1 day ago
Sun, Feb 2 - Mon, Feb 10
LHR
London
IAD
Washington
$620 Roundtrip, found 13 hours ago
$620
Roundtrip
found 13 hours ago
Select Virgin Atlantic flight, departing Sun, Feb 2 from London to Washington, returning Mon, Feb 10, priced at $620 found 13 hours ago
Mon, Jan 27 - Mon, Feb 3
LHR
London
IAD
Washington
$624 Roundtrip, found 5 hours ago
$624
Roundtrip
found 5 hours ago
Select British Airways flight, departing Mon, Jan 27 from London to Washington, returning Mon, Feb 3, priced at $624 found 5 hours ago
Tue, Feb 18 - Tue, Feb 25
LHR
London
IAD
Washington
$624 Roundtrip, found 3 days ago
$624
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Feb 18 from London to Washington, returning Tue, Feb 25, priced at $624 found 3 days ago
Wed, Apr 23 - Wed, Apr 30
LHR
London
IAD
Washington
$638 Roundtrip, found 12 hours ago
$638
Roundtrip
found 12 hours ago
Select Iberia flight, departing Wed, Apr 23 from London to Washington, returning Wed, Apr 30, priced at $638 found 12 hours ago
Tue, Feb 18 - Tue, Feb 25
LHR
London
IAD
Washington
$656 Roundtrip, found 3 days ago
$656
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Feb 18 from London to Washington, returning Tue, Feb 25, priced at $656 found 3 days ago

Frequently asked questions

Are there direct flights from Heathrow Airport to Washington Dulles Intl. Airport (IAD)?
United Airlines and British Airways are some of the airlines that advertise nonstop flights from London Heathrow to Dulles Intl. Airport. If you want to get to where you’re headed without a layover, these are the options for you.
How long is the flight from London Heathrow to IAD?
The flight between Heathrow Airport and Washington Dulles Intl. Airport (IAD) is usually about 8 hours and 14 minutes. Make your trip enjoyable by saving a movie or a few TV shows on your tablet or laptop and enjoying them with your seat fully reclined.
What is the flight distance from Heathrow Airport to Dulles Intl. Airport?
Your plane will have traveled 3,700 mi by the time you’ve taken off from Heathrow Airport (LHR) and landed smoothly at IAD. We suggest you bring plenty of activities to keep you occupied — it’s going to be a long flight.
What airlines fly from London Heathrow to Washington Dulles Intl. Airport (IAD)?
You’ll find a few airlines advertising direct flights between London and Sterling. United Airlines (UA) is one of the most reliable. This air carrier operates roughly 60 flights every month. A popular alternative is British Airways (BA), which offers 60 flights each month. The more airlines you look into, the more likely you are to pick up an amazing deal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From
Heathrow
Traveling To
Washington Dulles Intl.
Shortest Flight Time
8 hours 15 mins
Earliest Departure Time
12:05PM GMT
Latest Departure Time
4:30PM GMT
Lowest Flight Price
$542

Discover our best flights from London LHR to Washington IAD. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from London LHR to Washington IAD at the right price  

Airfares to Washington IAD from London LHR currently cost between $542 and $1,439. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from London LHR to Washington IAD 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from London LHR to Washington IAD on Travelocity starting at $640. Prices and availability subject to change. Additional terms may apply. 

 

Get to Washington IAD from London LHR quicker with direct flights. 

Get to Washington faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to IAD from LHR to take around 8 hour(s) 15 min(s).  

 

Find our cheapest airfares for flights from London LHR to Washington IAD

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to IAD from LHR. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from London LHR to Washington IAD today 

If you’re flexible about when you travel, April is usually the cheapest month to fly from London LHR to Washington IAD. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Washington IAD from London LHR 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to IAD from LHR have this option.  

 

Travel with confidence when you book flights to Washington IAD from London LHR with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving.