￥81,370 Cheap Flights from London (LHR) to Washington (IAD)

View ￥81,370 flight on Tue, Jan 20, 2026Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from London to Washington (LHR-IAD)

Prices were available within the past 7 days and start at ￥81,370 for one-way flights and ￥83,190 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Fri, Dec 5 - Wed, Jan 14
LHR
London
IAD
Washington
￥83,190 Roundtrip, found 16 hours ago
￥83,190
Roundtrip
found 16 hours ago
Select TAP Portugal flight, departing Fri, Dec 5 from London to Washington, returning Wed, Jan 14, priced at ￥83,190 found 16 hours ago
TAP Portugal
Fri, Dec 5 - Tue, Jan 13
LHR
London
IAD
Washington
￥88,200 Roundtrip, found 16 hours ago
￥88,200
Roundtrip
found 16 hours ago
Select TAP Portugal flight, departing Fri, Dec 5 from London to Washington, returning Tue, Jan 13, priced at ￥88,200 found 16 hours ago
Icelandair
Thu, Dec 4 - Thu, Dec 11
LHR
London
IAD
Washington
￥99,150 Roundtrip, found 6 days ago
￥99,150
Roundtrip
found 6 days ago
Select Icelandair flight, departing Thu, Dec 4 from London to Washington, returning Thu, Dec 11, priced at ￥99,150 found 6 days ago
Iberia
Sat, Dec 6 - Sun, Jan 11
LHR
London
IAD
Washington
￥103,870 Roundtrip, found 16 hours ago
￥103,870
Roundtrip
found 16 hours ago
Select Iberia flight, departing Sat, Dec 6 from London to Washington, returning Sun, Jan 11, priced at ￥103,870 found 16 hours ago
Delta
Thu, Dec 4 - Thu, Dec 11
LHR
London
IAD
Washington
￥105,390 Roundtrip, found 6 days ago
￥105,390
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Dec 4 from London to Washington, returning Thu, Dec 11, priced at ￥105,390 found 6 days ago
KLM
Thu, Dec 4 - Thu, Dec 11
LHR
London
IAD
Washington
￥113,450 Roundtrip, found 6 days ago
￥113,450
Roundtrip
found 6 days ago
Select KLM flight, departing Thu, Dec 4 from London to Washington, returning Thu, Dec 11, priced at ￥113,450 found 6 days ago
Air France
Thu, Dec 4 - Thu, Dec 11
LHR
London
IAD
Washington
￥113,450 Roundtrip, found 6 days ago
￥113,450
Roundtrip
found 6 days ago
Select Air France flight, departing Thu, Dec 4 from London to Washington, returning Thu, Dec 11, priced at ￥113,450 found 6 days ago
Swiss International Air Lines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
￥123,970 Roundtrip, found 2 days ago
￥123,970
Roundtrip
found 2 days ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at ￥123,970 found 2 days ago
Austrian Airlines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
￥124,400 Roundtrip, found 2 days ago
￥124,400
Roundtrip
found 2 days ago
Select Austrian Airlines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at ￥124,400 found 2 days ago
Royal Air Maroc
Sat, Dec 6 - Sun, Jan 11
LHR
London
IAD
Washington
￥136,490 Roundtrip, found 16 hours ago
￥136,490
Roundtrip
found 16 hours ago
Select Royal Air Maroc flight, departing Sat, Dec 6 from London to Washington, returning Sun, Jan 11, priced at ￥136,490 found 16 hours ago

Find the cheapest month to fly from London (LHR) to Washington (IAD)

October is typically the cheapest month to fly

From ￥72,343 - ￥113,795 per traveler.

Frequently asked questions

How much is a flight from Heathrow Airport to Washington Dulles Intl. Airport (IAD)?
Round-trip flights between Heathrow Airport and Washington Dulles Intl. Airport (IAD) start from ￥83,190. This is based on fares available within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from LHR to Washington Dulles Intl. Airport (IAD)?
This varies between airlines, as each one has its own set of terms and conditions. Visit the Customer Service Portal, where there are simple instructions on how to cancel your flight online.
How do I find cheap flights from London Heathrow to Dulles Intl. Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Heathrow Airport to Washington Dulles Intl. Airport (IAD) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from London Heathrow to IAD?
The average flight time between LHR and IAD is 8 hours and 13 minutes. If you're traveling with kids, it's always a good idea to pack a few healthy snacks in your carry-on luggage.
How far is the flight from Heathrow Airport (LHR) to Dulles Intl. Airport?
With a flight distance of 5,900 kilometers between Hounslow and Chantilly, this is a long-haul trip. Make sure you drink lots of water and move your feet and legs every so often.
Which airlines fly direct from LHR to Washington Dulles Intl. Airport (IAD)?
United Airlines (UA) is a popular option. It offers 91 flights from Heathrow Airport (LHR) to IAD each month. Like more options? Check out the ticket prices from British Airways (BA). This carrier offers 60 fights monthly between these airports.
Are London Heathrow to Washington Dulles Intl. Airport (IAD) flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Heathrow Airport to Washington Dulles Intl. Airport (IAD) can be hit-or-miss. It is possible to find a bargain, but you could also miss out entirely! If you'd rather start planning your trip ahead of time, Expedia compares flight deals up to 12 months in advance. Just bear in mind that not all airlines publish their prices so far in advance. Our advice? Check back often as updates are made frequently.

Travel information

Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, avianca
Roundtrip price
￥83,190
Distance
5866 km
Average flight time
3 hours 36 mins

Book with confidence

London to Washington Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from London to will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Washington.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with LHR to IAD flights that won’t make your bank account wince. Ready to temporarily leave behind London for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to IAD with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

London to Washington Flights

Explore a world of travel with Expedia

Washington nearby Airports

Washington

London to Ronald Reagan Washington National
￥102,820

Baltimore

London nearby Airports

London

*Available to Expedia members.