IAD to LHR (Washington to London) Flights

Last Minute Flights from IAD to LHR

Best airfare and ticket deals for IAD to LHR flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
IADLondonMay 3 to May 10$673
*Prices include taxes and fees

Cheapest IAD to LHR Flights

Best airfare and ticket deals for IAD to LHR flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
IADLondonMarch 16 to March 24$499
IADLondonDecember 9 to December 13$500
IADLondonSeptember 25 to October 4$510
IADLondonAugust 20 to December 20$538
*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

Which airlines with flights from Washington, DC Airport (IAD-Washington Dulles Intl.) to London Airport (LHR-Heathrow) allow free cancellation due to COVID-19?
Plenty of airlines now advertise flexible airfares so you can plan your flight to LHR with confidence. To locate which carriers have these kinds of tickets, use our convenient filter tool. Just check the “No change fee” box directly underneath the “Flexible change policies” subheading. Also read through the ticket’s terms and conditions so you’re familiar with what COVID-19 related changes are covered.
What airlines fly direct from Washington, DC Airport (IAD-Washington Dulles Intl.) to London Heathrow?
Fly with United Airlines (UA). It offers 60 flights per month that jet straight from Washington, DC Airport (IAD-Washington Dulles Intl.) to London Heathrow. With 60 nonstop monthly services of its own on this air route, British Airways (BA) is another top pick.
How many flights are there from IAD to LHR?
Around 5 each day. If you’re in a big hurry to visit London, see if you can nab a great last-minute deal from Washington, DC Airport (IAD-Washington Dulles Intl.) to London Airport (LHR-Heathrow) and then book it right away!
How long does it take to fly from Washington, DC Airport (IAD-Washington Dulles Intl.) to London Airport (LHR-Heathrow)?
Washington, DC Airport (IAD-Washington Dulles Intl.) to London Airport (LHR-Heathrow) takes about 7 hours and 19 minutes. That’s an ideal amount of time to binge-watch a blockbuster new series, get engrossed in a podcast or have a snooze.
What is the flight distance from Washington, DC Airport (IAD-Washington Dulles Intl.) to London Airport (LHR-Heathrow)?
Some 3700 miles (5900 km) separates Loudoun County and London. You’ll be in your plane seat for a lengthy period on this long-haul flight, so carefully choose where you sit.
How many afternoon flights are there from IAD to LHR?
If you like to sleep in, jump on one of the 35 afternoon and evening flights available every week from IAD to LHR.
  • British Airways (BA) has 14 flights a week departing after midday. The earliest leaves the tarmac at 2:30AM.
  • United Airlines (UA) is a great alternative, operating 14 afternoon and evening flights per week. The earliest takes off at 2:05AM.
What is the earliest departure time out of Loudoun County to London?
Don’t stress about hitting the snooze button once or twice — the first flight leaves IAD at 6:15PM. 1:45AM is the estimated time of arrival at LHR.
What is the latest departure time out of Loudoun County to London?
From IAD, the latest flight you can get leaves at 10:30PM and comes in for landing at LHR at 5:45AM. If you’re averse to early starts, this is the flight to book.
What is the average price from Loudoun County to London?
Flights from IAD to LHR can be found for around $499. You’ll want to get a move on, because deals this good don’t last long! 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 perhaps simply to treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find the cheapest flights from IAD to LHR, we’ve got you covered here at Flights.com.

We present you with some of the hottest 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.