$296 Cheap Flights from Washington to London

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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 $388 round trip and $296 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for IAD to LHR

CarrierFlightDepart IADArrive LHRFri
UA91805:30 pm05:55 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
BA21606:10 pm06:30 amCheck Fare
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UA92410:05 pm10:30 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
BA29210:40 pm10:55 amCheck FareCheck FareCheck Fare
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0 Stops
VS2206:45 pm07:10 am
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0 Stops
BG191306:00 pm07:15 am
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0 Stops

Best Heathrow Flight and Hotel Packages

Heathrow flight + hotel packages - economy flights

The Londoner
The Standard London
Baglioni Hotel London - The Leading Hotels of the World
The Piccadilly London West End
Royal Garden Hotel
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Frequently asked questions

Can I catch a flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR) right now?
It’s prudent to know about any travel advice reports and quarantine requirements in effect in your destination city. Be sure to check out our Covid-19 Travel Advisor for up-to-date information on flying to Heathrow Airport.
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.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Heathrow Airport (LHR), please visit our Customer Service Portal.
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 airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with British Airways, Virgin Atlantic or SAS you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
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 15 mins
Earliest Departure Time 5:35PM BST
Latest Departure Time 10:40PM BST
Lowest Flight Price $388

Route Info

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

3,687.00 miles

Airlines & Aircraft Used on IAD to LHR Flight Routes

Airline Carrier
Air Canada
Boeing 737-300 pax
Air Canada
Boeing 737-500 pax
Air Canada
Boeing 737-700 pax
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 $388 and $615. 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 $296. 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) 15 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, January 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.