€218 Cheap Flights Washington to London (IAD-LHR)

View €218 flight on Sun, 17 Aug 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 15% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Washington to London (IAD-LHR)

Prices were available within the past 7 days and start at €218 for one-way flights and €553 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Tue, 6 May - Tue, 13 May
IAD
Washington
LHR
London
€553 Return, found 23 hours ago
€553
Return
found 23 hours ago
Select Scandinavian Airlines flight, departing Tue, 6 May from Washington to London, returning Tue, 13 May, priced at €553 found 23 hours ago
Scandinavian Airlines
Mon, 21 Apr - Tue, 29 Apr
IAD
Washington
LHR
London
€579 Return, found 6 days ago
€579
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Mon, 21 Apr from Washington to London, returning Tue, 29 Apr, priced at €579 found 6 days ago
Aer Lingus
Tue, 4 Nov - Tue, 18 Nov
IAD
Washington
LHR
London
€583 Return, found 2 days ago
€583
Return
found 2 days ago
Select Aer Lingus flight, departing Tue, 4 Nov from Washington to London, returning Tue, 18 Nov, priced at €583 found 2 days ago
Icelandair
Tue, 6 May - Tue, 13 May
IAD
Washington
LHR
London
€590 Return, found 23 hours ago
€590
Return
found 23 hours ago
Select Icelandair flight, departing Tue, 6 May from Washington to London, returning Tue, 13 May, priced at €590 found 23 hours ago
Iberia
Tue, 6 May - Tue, 13 May
IAD
Washington
LHR
London
€610 Return, found 23 hours ago
€610
Return
found 23 hours ago
Select Iberia flight, departing Tue, 6 May from Washington to London, returning Tue, 13 May, priced at €610 found 23 hours ago
American Airlines
Mon, 21 Apr - Tue, 29 Apr
IAD
Washington
LHR
London
€618 Return, found 6 days ago
€618
Return
found 6 days ago
Select American Airlines flight, departing Mon, 21 Apr from Washington to London, returning Tue, 29 Apr, priced at €618 found 6 days ago
Virgin Atlantic
Tue, 4 Nov - Tue, 18 Nov
IAD
Washington
LHR
London
€620 Return, found 2 days ago
€620
Return
found 2 days ago
Select Virgin Atlantic flight, departing Tue, 4 Nov from Washington to London, returning Tue, 18 Nov, priced at €620 found 2 days ago
Air Canada
Mon, 21 Apr - Tue, 29 Apr
IAD
Washington
LHR
London
€624 Return, found 6 days ago
€624
Return
found 6 days ago
Select Air Canada flight, departing Mon, 21 Apr from Washington to London, returning Tue, 29 Apr, priced at €624 found 6 days ago
Austrian Airlines
Mon, 21 Apr - Tue, 29 Apr
IAD
Washington
LHR
London
€628 Return, found 6 days ago
€628
Return
found 6 days ago
Select Austrian Airlines flight, departing Mon, 21 Apr from Washington to London, returning Tue, 29 Apr, priced at €628 found 6 days ago
KLM
Mon, 21 Apr - Tue, 29 Apr
IAD
Washington
LHR
London
€653 Return, found 6 days ago
€653
Return
found 6 days ago
Select KLM flight, departing Mon, 21 Apr from Washington to London, returning Tue, 29 Apr, priced at €653 found 6 days ago
Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
€552
Distance
5866 km

Perfect flights from Washington to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Washington to London. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of London, surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Washington Dulles Intl. to Heathrow ticket options cater to your travel preferences, with incredible one-way fares from €218 and roundtrip prices from €553. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Heathrow and explore London and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your IAD to LHR travel arrangements today and embark on the journey of a lifetime in London.

Frequently asked questions

How much is a flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
Start packing your suitcase, because round-trip journeys from IAD to London Heathrow start from €553. That’s based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book today to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Dulles Intl. Airport to Heathrow Airport?
We understand that things come up unexpectedly, so we’ve made it as easy as possible for you to cancel your trip online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Dulles Intl. Airport to Heathrow Airport (LHR) 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 IAD to Heathrow Airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Dulles Intl. Airport to LHR?
You’ll have 5,900 kilometres to cover on the long-haul Chantilly to Hounslow route. Dress in layers of comfortable clothes and consider taking a sleep mask and earplugs.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Heathrow Airport?
With 60 flights a month from Dulles Intl. Airport to LHR, United Airlines (UA) is an excellent choice. Another carrier operating on this route is British Airways (BA). You’ll have 60 flights every month to choose from.
Are IAD to LHR flight tickets cheaper when they're purchased at the last minute?
Booking your trip from IAD to London Heathrow at the last minute could be your ticket to a great deal. However, it could end up costing a great deal more! If you’d prefer to err on the side of caution, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to a year in advance. If your preferred carrier hasn’t released tickets yet, check back regularly as deals are updated on Expedia all the time.

Explore a world of travel with Expedia

*Available to Expedia members.