$217 Cheap flights from Washington Dulles Intl. to Heathrow (IAD to LHR)

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

Amazing IAD to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $494 round trip and $217 one way. Prices and availability subject to change. Additional terms may apply.

Mon, Feb 10 - Mon, Feb 17
IAD
Washington
LHR
London
$494 Roundtrip, found 3 days ago
$494
Roundtrip
found 3 days ago
Select TAP Portugal flight, departing Mon, Feb 10 from Washington to London, returning Mon, Feb 17, priced at $494 found 3 days ago
Tue, Feb 18 - Mon, Feb 24
IAD
Washington
LHR
London
$511 Roundtrip, found 1 day ago
$511
Roundtrip
found 1 day ago
Select Icelandair flight, departing Tue, Feb 18 from Washington to London, returning Mon, Feb 24, priced at $511 found 1 day ago
Mon, Dec 2 - Tue, Dec 10
IAD
Washington
LHR
London
$585 Roundtrip, found 7 hours ago
$585
Roundtrip
found 7 hours ago
Select Scandinavian Airlines flight, departing Mon, Dec 2 from Washington to London, returning Tue, Dec 10, priced at $585 found 7 hours ago
Mon, Dec 2 - Tue, Dec 10
IAD
Washington
LHR
London
$609 Roundtrip, found 7 hours ago
$609
Roundtrip
found 7 hours ago
Select Lufthansa flight, departing Mon, Dec 2 from Washington to London, returning Tue, Dec 10, priced at $609 found 7 hours ago
Wed, Dec 4 - Tue, Dec 24
IAD
Washington
LHR
London
$616 Roundtrip, found 9 hours ago
$616
Roundtrip
found 9 hours ago
Select Virgin Atlantic flight, departing Wed, Dec 4 from Washington to London, returning Tue, Dec 24, priced at $616 found 9 hours ago
Tue, Dec 3 - Tue, Dec 10
IAD
Washington
LHR
London
$618 Roundtrip, found 7 hours ago
$618
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Tue, Dec 3 from Washington to London, returning Tue, Dec 10, priced at $618 found 7 hours ago
Tue, Feb 25 - Fri, Mar 7
IAD
Washington
LHR
London
$621 Roundtrip, found 1 hour ago
$621
Roundtrip
found 1 hour ago
Select Iberia flight, departing Tue, Feb 25 from Washington to London, returning Fri, Mar 7, priced at $621 found 1 hour ago
Wed, Feb 12 - Fri, Feb 28
IAD
Washington
LHR
London
$621 Roundtrip, found 1 day ago
$621
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Feb 12 from Washington to London, returning Fri, Feb 28, priced at $621 found 1 day ago
Sun, Dec 8 - Tue, Dec 17
IAD
Washington
LHR
London
$627 Roundtrip, found 1 hour ago
$627
Roundtrip
found 1 hour ago
Select Virgin Atlantic flight, departing Sun, Dec 8 from Washington to London, returning Tue, Dec 17, priced at $627 found 1 hour ago
Wed, Dec 4 - Wed, Dec 11
IAD
Washington
LHR
London
$628 Roundtrip, found 7 hours ago
$628
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Dec 4 from Washington to London, returning Wed, Dec 11, priced at $628 found 7 hours ago

Best Heathrow Flight and Hotel Packages

Heathrow flight + hotel packages - economy flights

Price found within the past 48 hours. Click for updated prices.
Hotel Riu Plaza London Victoria

Hotel Riu Plaza London Victoria

4 out of 5
per person
Dec 31 - Jan 5
found 1 day ago
Roundtrip non-stop flight included
Washington (DCA) to London (LHR)
Corinthia London

Corinthia London

5 out of 5
Save 100% on your flight
per person
Dec 31 - Jan 5
found 1 day ago
Roundtrip non-stop flight included
Washington (DCA) to London (LHR)
Sofitel London St James

Sofitel London St James

5 out of 5
per person
Dec 31 - Jan 5
found 1 day ago
Roundtrip non-stop flight included
Washington (DCA) to London (LHR)
The London EDITION

The London EDITION

5 out of 5
per person
Dec 31 - Jan 5
found 1 day ago
Roundtrip non-stop flight included
Washington (DCA) to London (LHR)
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Frequently asked questions

Are there direct flights from Washington Dulles Intl. Airport (IAD) to LHR?
Kick off your escape relaxed and calm and travel straight to Heathrow Airport from IAD. United Airlines and British Airways are among the airlines that offer nonstop services on this flight path.
How long is the flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport?
If you’re traveling from Sterling to London, you can expect the flight to take an average of 7 hours and 19 minutes. If this sounds longer than you had hoped, why not take advantage of it? Read about where you’re headed, fine tune your itinerary and get as much shut-eye as possible before the adventure begins.
What is the flight distance from IAD to London Heathrow?
With 3,700 mi between Sterling and London, you’ll have plenty of time to relax and unwind. Take advantage of the entertainment on board, do some puzzles or doze for a while.
What airlines fly from IAD to Heathrow Airport (LHR)?
If you’re flying to London from Sterling, you’ll find several airlines that advertise direct flights. One of the best is United Airlines (UA), which has 60 flights each month. If you want more options, check out the fares on offer from British Airways (BA). This airline operates 60 flights on the Sterling to London route each month. Between the two, you’re bound to find the flight that’s perfect for you.
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
Washington Dulles Intl.
Traveling To
Heathrow
Shortest Flight Time
17 hours 10 mins
Earliest Departure Time
6:00PM GMT
Latest Departure Time
10:15PM GMT
Lowest Flight Price
$494

Route Info

Flight path for flights from Washington Dulles International Airport to London Heathrow Airport


Origin:
IAD - Washington Dulles International Airport
Destination:
LHR - London Heathrow Airport
Distance:
3,687.00 miles


Airlines & Aircraft Used on IAD to LHR Flight Routes


Airline Carrier
Aircraft
Air Canada
Boeing 737-300 pax
Air Canada
Boeing 737-500 pax
Air Canada
Boeing 737-700 pax
Austrian
Boeing 777-300ER
Jet Airways (India)
Boeing 737-900 pax
United Airlines
Boeing 737-700 pax
United Airlines
Boeing 737-800 pax
United Airlines
Boeing 757-200 pax

Discover our best flights from Washington IAD to London LHR. 

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 Washington IAD to London LHR at the right price  

Airfares to London LHR from Washington IAD currently cost between $494 and $628. 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 Washington IAD to London LHR 

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 Washington IAD to London LHR on Travelocity starting at $217. Prices and availability subject to change. Additional terms may apply. 

 

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

Get to London faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to LHR from IAD to take around 17 hour(s) 10 min(s).  

 

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

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to LHR from IAD. 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 Washington IAD to London LHR today 

If you’re flexible about when you travel, February is usually the cheapest month to fly from Washington IAD to London LHR. 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 London LHR from Washington IAD 

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

 

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

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.