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Amazing IAD to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $346 round trip and $133 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for IAD to LHR

Carrier Flight Depart IAD Arrive LHR Tue
10/27
Wed
10/28
Thu
10/29
Fri
10/30
Sat
10/31
Sun
11/1
Mon
11/2
Stops
UA 918 07:15 pm 06:20 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
BA 292 11:35 pm 10:40 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)

FAQs about flights from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)

Are there direct flights from Washington, DC (IAD-Washington Dulles Intl.) to London Heathrow?

British Airways and United Airlines are among the airlines that sell direct flights from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow). If you're eager to get to where you're headed fast, these might be just the ticket.

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 London (LHR-Heathrow), please visit our Customer Service Portal.

How long is the flight from Washington, DC (IAD-Washington Dulles Intl.) to London Heathrow?

If you're traveling from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow), you can expect the journey to take about 8 hours and 32 minutes. If this is longer than you had hoped, why not put it to good use? Read up on where you're headed, fine tune your itinerary and get as much sleep as possible before the adventure starts.

What is the flight distance from Washington, DC (IAD-Washington Dulles Intl.) to London Heathrow?

With 4,101 mi separating Washington, DC (IAD-Washington Dulles Intl.) and London (LHR-Heathrow), you'll have more than enough time to relax. Make use of the entertainment on board, write in your journal or catch up on some shut-eye.

What airlines fly from Washington, DC (IAD-Washington Dulles Intl.) to London Heathrow?

There are several airlines that offer direct flights from Washington, DC (IAD-Washington Dulles Intl.) to London (LHR-Heathrow). British Airways (BA) is well-known, offering around 40 flights each month. If that's not enough for you, check out the deals on offer from United Airlines (UA). This airline has 58 flights each month. Between the two, there's no doubt you'll find the flight to suit your needs.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week 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 2019, flights departing on a Tuesday 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 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.

Washington Dulles Intl. to Heathrow Flight FAQ

Traveling FromWashington Dulles Intl.
Traveling ToHeathrow
Shortest Flight Time16 hours 55 mins
Earliest Departure Time6:25PM GMT
Latest Departure Time10:35PM GMT
Lowest Flight Price$346

Washington to London Carriers and Route Information

Flight path for flights from Washington Dulles International Airport to 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
*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.