IAD to LHR (Washington to London) Flights

Last Minute Flights from IAD to LHR

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
IADLondonMay 3 to May 9$614
*Prices include taxes and fees

Cheapest IAD to LHR Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
IADLondonOctober 20 to October 27$400
IADLondonMarch 8 to March 14$430
IADLondonOctober 20 to October 27$464
IADLondonSeptember 22 to September 30$474
*Prices include taxes and fees
IAD to LHR Flight Details
Origin airport
Washington Dulles Intl.
Origin airport IATA code
IAD
Destination airport
Heathrow
Destination airport IATA code
LHR
Distance
3666 mi

Frequently asked questions

What airlines fly direct from Dulles Intl. Airport to LHR?
Spend less time stuck on a plane and more time on vacation with United Airlines (UA) and British Airways (BA). Both operate nonstop flights from Dulles Intl. Airport to London Heathrow. United Airlines has 60 of these services per month, while British Airways advertises 60.
How many flights are there from IAD to LHR?
Approximately 5 flights are available daily from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow). Fasten your seat belt because your plane to Hounslow is ready to jet off.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow)?
You’ll be aboard the plane for approximately 7 hours and 17 minutes from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow), so choose comfy clothes to wear. Cozy sweaters, leggings and slip-on sneakers are popular options for a flight of this length.
What is the flight distance from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow)?
It’s 3,700 miles (5,900 1) from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow). Make the hours go by faster on this long-haul flight by carrying a smartphone or tablet filled with entertainment.
How many afternoon flights are there from IAD to LHR?
If you’re not a morning person, select one of the 35 afternoon and evening flights available weekly from IAD to LHR.

  • Book a ticket with British Airways (BA). It operates 14 afternoon and evening flights a week departing from 5:55PM onward.
  • United Airlines (UA) is another good option, offering 14 afternoon and evening flights each week. The earliest departs at 6:10PM.

What is the earliest departure time out of Chantilly to Hounslow?
Don’t stress about hitting the snooze button once or twice — the first flight leaves IAD at 5:55PM. 1:15AM is the expected time of touchdown at LHR.
What is the latest departure time out of Chantilly to Hounslow?
The latest flight departs IAD at 10:50PM and arrives at LHR at 6:10AM. You’ll have adequate time to get ready for this trip.
What is the average price from Chantilly to Hounslow?
On average, the cheapest price for round-trip flights from IAD to LHR is $400. Pick up your own great deal by locking in your seats early. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Washington to London Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Washington to London to attend your cousin’s wedding, to pitch a business idea to your boss, or simply treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find our cheapest flights from IAD to LHR, we’ve got you covered here at Flights.com.

We present you with some of the most affordable deals on airfare, so stop that Google flights search. We want you to spend less on your flight from Washington to London, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.