$664 Cheap Flights from London (LHR) to Washington (IAD)

Bundle Your Flight + Hotel & Save!

Featured airlines

Top nine airline logos for desktop

    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 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from London to Washington (LHR-IAD)

Prices were available within the past 7 days and start at $664 for one-way flights and $561 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Thu, Oct 24 - Wed, Oct 30
LHR
London
IAD
Washington
$561 Roundtrip, found 13 hours ago
$561
Roundtrip
found 13 hours ago
Select TAP Portugal flight, departing Thu, Oct 24 from London to Washington, returning Wed, Oct 30, priced at $561 found 13 hours ago
Scandinavian Airlines
Fri, Sep 13 - Sun, Sep 15
LHR
London
IAD
Washington
$667 Roundtrip, found 5 days ago
$667
Roundtrip
found 5 days ago
Select Scandinavian Airlines flight, departing Fri, Sep 13 from London to Washington, returning Sun, Sep 15, priced at $667 found 5 days ago
Delta
Tue, Sep 17 - Wed, Oct 2
LHR
London
IAD
Washington
$671 Roundtrip, found 6 days ago
$671
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Sep 17 from London to Washington, returning Wed, Oct 2, priced at $671 found 6 days ago
Virgin Atlantic
Fri, Dec 13 - Sat, Jan 4
LHR
London
IAD
Washington
$678 Roundtrip, found 1 day ago
$678
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Fri, Dec 13 from London to Washington, returning Sat, Jan 4, priced at $678 found 1 day ago
Icelandair
Tue, Dec 31 - Tue, Jan 14
LHR
London
IAD
Washington
$685 Roundtrip, found 12 hours ago
$685
Roundtrip
found 12 hours ago
Select Icelandair flight, departing Tue, Dec 31 from London to Washington, returning Tue, Jan 14, priced at $685 found 12 hours ago
British Airways
Tue, Dec 31 - Tue, Jan 14
LHR
London
IAD
Washington
$696 Roundtrip, found 12 hours ago
$696
Roundtrip
found 12 hours ago
Select British Airways flight, departing Tue, Dec 31 from London to Washington, returning Tue, Jan 14, priced at $696 found 12 hours ago
Austrian Airlines
Tue, Nov 5 - Tue, Nov 12
LHR
London
IAD
Washington
$710 Roundtrip, found 1 day ago
$710
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Tue, Nov 5 from London to Washington, returning Tue, Nov 12, priced at $710 found 1 day ago
United
Mon, Sep 23 - Tue, Oct 1
LHR
London
IAD
Washington
$711 Roundtrip, found 2 days ago
$711
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 23 from London to Washington, returning Tue, Oct 1, priced at $711 found 2 days ago
Lufthansa
Wed, Nov 13 - Wed, Nov 20
LHR
London
IAD
Washington
$713 Roundtrip, found 15 hours ago
$713
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Wed, Nov 13 from London to Washington, returning Wed, Nov 20, priced at $713 found 15 hours ago
Brussels Airlines
Mon, Sep 16 - Mon, Oct 7
LHR
London
IAD
Washington
$715 Roundtrip, found 2 days ago
$715
Roundtrip
found 2 days ago
Select Brussels Airlines flight, departing Mon, Sep 16 from London to Washington, returning Mon, Oct 7, priced at $715 found 2 days ago
Flights from London (LHR) to Washington (IAD)
Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, 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, Virgin Atlantic
Roundtrip price
$560
Distance
3666 mi

London to Washington Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from London to Washington offer the perfect respite. Not only does exploring Washington provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from London to Washington may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from LHR to IAD today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Washington are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Washington more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Washington is $664 now!

Frequently asked questions

How much is a one-way flight from LHR to Washington Dulles Intl. Airport (IAD)?
You can find one-way London flights to Washington starting from only $664. This is based on the best fare found on Expedia for this route departing in the next three months and was updated on June 4 2024 and has not changed since. This particular airfare is for an TAP Portugal service, setting off from Heathrow Airport (LHR) on August 30 2024 and touching down at Dulles Intl. Airport.
How long does it take to fly from London Heathrow to IAD?
With United Airlines, a direct flight takes about 8 hours. Book the 12:15PM flight from Heathrow Airport (LHR) and land at Dulles Intl. Airport at 3:15PM. Score a top deal on this route when you use Expedia to arrange your trip.
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) last minute?
Being a spontaneous soul is a terrific way to travel the world, but it isn’t always the best method to pick up a cheap plane ticket. Consider booking your LHR to IAD journey well in advance rather than waiting till the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. Leave your spontaneity for when you get to IAD!
What is the cheapest airline flying from Heathrow Airport to Washington Dulles Intl. Airport (IAD) in the next 90 days?
The cheapest airline traveling from London to Washington found on Expedia is TAP Portugal, which has fares starting from $664. This price is based on airfares found on Expedia with a departure date within the next 90 days. The flight jets off from Heathrow Airport (LHR) on August 30 2024 and lands at IAD. Pricing information was updated on June 4 2024 and has not changed since.
What's the cheapest price for a flight from LHR to Dulles Intl. Airport next month?
With a one-way flight from London to Washington on sale for just $664, you’ll have more dough left in your hip pocket for sightseeing. This deal was found after searching all available flights on Expedia within the next 30 days. This particular service jets out from London Heathrow on June 24 2024, lands at Dulles Intl. Airport and is with TAP Portugal. The price of this flight was last updated on June 4 2024 and has not changed since.
What airline has the least delays from London Heathrow to Washington Dulles Intl. Airport (IAD)?
Take off with United Airlines from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD) and you’re more likely to arrive at the time that’s on your plane ticket. This airline takes first place on this route, with 91% of flights arriving on time. If your flight experiences a delay, the Expedia App is a great way to stay up to date. Our popular app provides immediate trip updates, from flight delays to gate changes.
Can I find cheap nonstop flights from Heathrow Airport to IAD in the next three months?
Your next getaway doesn’t have to cost a small fortune. We’ve located a roundtrip nonstop flight from London to Washington within the next 90 days for $711. This price was found after looking at all available flights on Expedia with a departure date in the next three months and was updated on June 4 2024. The flight via Virgin Atlantic sets off from LHR on June 11 2024 and touches down at Dulles Intl. Airport. It has a return date of September 7 2024.To source nonstop cheap flights from Heathrow Airport to Dulles Intl. Airport, use our filters after you press the search button. Simply click on “Nonstop” under “Filter by” on the left side of the page to browse your options. Your results will be sorted from the lowest price, so you’ll see the cheapest nonstop airfares first. You’re also able to compare prices for nearby dates by clicking “Flexible dates” located near the top of the page.
What airports do you fly into for Sterling from London?
Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) are your options when jetting from London to Sterling. Roughly 4 mi south of the heart of Sterling, Washington Dulles Intl. Airport (IAD) is the city’s main hub. Take into account things like flight arrival and departure times and the distance to your hotel before you select an airport. Reston Town Center and One Loudoun are a couple of fantastic attractions to put on your itinerary when you arrive at your destination.
What are the most popular departure times for flights from Heathrow Airport (LHR) to Washington Dulles Intl. Airport (IAD)?
The most popular departure times for journeys from LHR to Washington Dulles Intl. Airport (IAD) fall between 8:00 AM - 9:00 AM on United Airlines. It’s a good idea to head off in the morning. The earlier you set off, the better your odds of a delay-free flight as air traffic hasn’t yet built up.
Can I change the date of my flight from Heathrow Airport (LHR) to IAD?
We know life happens and plans change, so Expedia is here to help make amending your journey as easy as possible. To start, find your Heathrow Airport (LHR) to IAD itinerary through the Expedia Trips portal and check the fare conditions to see if change fees apply. If you booked your airfare in the last 24 hours, some carriers will let you cancel without charge and organize new flights. If you bought your fare more than 24 hours ago, get in touch with us through our Customer Service portal to learn more about your options.
*Available to One Key members.