$243 Cheap Flights from Washington (IAD) to London (LHR)

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Flight deals we found

These prices are lower than our typical predictions for similar flights.
75% less than typical
$620
Roundtrip per traveler
Tue, Sep 10 - Fri, Sep 27
British AirwaysBritish Airways
7h 20m
5:55pm
6:15am
+1
IAD
Nonstop
LHR
Found 13 hours ago
75% less than typical
$585
Roundtrip per traveler
Wed, Oct 9 - Wed, Oct 16
British AirwaysBritish Airways
7h 20m
10:45pm
11:05am
+1
IAD
Nonstop
LHR
Found 17 hours ago
70% less than typical
$670
Roundtrip per traveler
Tue, Sep 3 - Sat, Dec 7
UnitedUnited
7h 15m
6:30pm
6:45am
+1
IAD
Nonstop
LHR
Found 14 hours ago
60% less than typical
$974
Roundtrip per traveler
Wed, Jul 3 - Wed, Jul 10
UnitedUnited
7h 15m
10:25pm
10:40am
+1
IAD
Nonstop
LHR
Found 15 hours ago
65% less than typical
$603
Roundtrip per traveler
Wed, Sep 18 - Tue, Sep 24
British AirwaysBritish Airways
7h 20m
10:45pm
11:05am
+1
IAD
Nonstop
LHR
Just found
65% less than typical
$646
Roundtrip per traveler
Tue, May 14 - Tue, May 28
UnitedUnited
7h 15m
10:25pm
10:40am
+1
IAD
Nonstop
LHR
Found 13 hours ago
65% less than typical
$616
Roundtrip per traveler
Tue, Sep 17 - Tue, Jan 7
Virgin AtlanticVirgin Atlantic
7h 15m
10:15pm
10:30am
+1
IAD
Nonstop
LHR
Just found
55% less than typical
$915
Roundtrip per traveler
Sat, Jul 13 - Sat, Jul 20
UnitedUnited
7h 15m
6:30pm
6:45am
+1
IAD
Nonstop
LHR
Found 12 hours ago
45% less than typical
$1,032
Roundtrip per traveler
Fri, Jul 5 - Fri, Jul 12
British AirwaysBritish Airways
7h 20m
10:45pm
11:05am
+1
IAD
Nonstop
LHR
Found 9 hours ago
45% less than typical
$1,039
Roundtrip per traveler
Fri, May 24 - Sun, May 26
UnitedUnited
7h 15m
6:30pm
6:45am
+1
IAD
Nonstop
LHR
Found 13 hours ago
45% less than typical
$994
Roundtrip per traveler
Tue, Jul 2 - Tue, Jul 16
UnitedUnited
7h 15m
6:30pm
6:45am
+1
IAD
Nonstop
LHR
Found 19 hours ago
45% less than typical
$1,032
Roundtrip per traveler
Tue, Jul 2 - Sun, Jul 7
British AirwaysBritish Airways
7h 20m
10:45pm
11:05am
+1
IAD
Nonstop
LHR
Found 10 hours ago
45% less than typical
$1,077
Roundtrip per traveler
Sun, May 19 - Fri, May 24
UnitedUnited
7h 15m
10:25pm
10:40am
+1
IAD
Nonstop
LHR
Found 21 hours ago
45% less than typical
$900
Roundtrip per traveler
Mon, Jun 10 - Mon, Jun 17
Virgin AtlanticVirgin Atlantic
7h 15m
10:15pm
10:30am
+1
IAD
Nonstop
LHR
Found 11 hours ago
45% less than typical
$900
Roundtrip per traveler
Tue, Jun 11 - Mon, Jun 17
Virgin AtlanticVirgin Atlantic
7h 15m
10:15pm
10:30am
+1
IAD
Nonstop
LHR
Found 15 hours ago

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Cheap Flights from Washington to London (IAD-LHR)

Prices were available within the past 7 days and start at $243 for one-way flights and $411 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Wed, Mar 26 - Sat, Apr 5
IAD
Washington
LHR
London
$411 Roundtrip, found 4 hours ago
$411
Roundtrip
found 4 hours ago
Select TAP Portugal flight, departing Wed, Mar 26 from Washington to London, returning Sat, Apr 5, priced at $411 found 4 hours ago
Virgin Atlantic
Wed, Oct 2 - Mon, Oct 7
IAD
Washington
LHR
London
$471 Roundtrip, found 20 hours ago
$471
Roundtrip
found 20 hours ago
Select Virgin Atlantic flight, departing Wed, Oct 2 from Washington to London, returning Mon, Oct 7, priced at $471 found 20 hours ago
British Airways
Wed, Nov 27 - Wed, Dec 11
IAD
Washington
LHR
London
$475 Roundtrip, found 8 hours ago
$475
Roundtrip
found 8 hours ago
Select British Airways flight, departing Wed, Nov 27 from Washington to London, returning Wed, Dec 11, priced at $475 found 8 hours ago
Iberia
Wed, Nov 27 - Wed, Dec 11
IAD
Washington
LHR
London
$475 Roundtrip, found 8 hours ago
$475
Roundtrip
found 8 hours ago
Select Iberia flight, departing Wed, Nov 27 from Washington to London, returning Wed, Dec 11, priced at $475 found 8 hours ago
Air Canada
Wed, Nov 27 - Wed, Dec 11
IAD
Washington
LHR
London
$515 Roundtrip, found 8 hours ago
$515
Roundtrip
found 8 hours ago
Select Air Canada flight, departing Wed, Nov 27 from Washington to London, returning Wed, Dec 11, priced at $515 found 8 hours ago
Swiss International Air Lines
Wed, Oct 2 - Mon, Oct 7
IAD
Washington
LHR
London
$516 Roundtrip, found 20 hours ago
$516
Roundtrip
found 20 hours ago
Select Swiss International Air Lines flight, departing Wed, Oct 2 from Washington to London, returning Mon, Oct 7, priced at $516 found 20 hours ago
Lufthansa
Wed, Nov 27 - Wed, Dec 11
IAD
Washington
LHR
London
$522 Roundtrip, found 8 hours ago
$522
Roundtrip
found 8 hours ago
Select Lufthansa flight, departing Wed, Nov 27 from Washington to London, returning Wed, Dec 11, priced at $522 found 8 hours ago
Icelandair
Mon, Aug 12 - Tue, Nov 26
IAD
Washington
LHR
London
$557 Roundtrip, found 4 days ago
$557
Roundtrip
found 4 days ago
Select Icelandair flight, departing Mon, Aug 12 from Washington to London, returning Tue, Nov 26, priced at $557 found 4 days ago
Brussels Airlines
Sun, Aug 25 - Wed, Sep 4
IAD
Washington
LHR
London
$560 Roundtrip, found 2 days ago
$560
Roundtrip
found 2 days ago
Select Brussels Airlines flight, departing Sun, Aug 25 from Washington to London, returning Wed, Sep 4, priced at $560 found 2 days ago
Austrian Airlines
Mon, Jul 29 - Fri, Aug 30
IAD
Washington
LHR
London
$562 Roundtrip, found 11 hours ago
$562
Roundtrip
found 11 hours ago
Select Austrian Airlines flight, departing Mon, Jul 29 from Washington to London, returning Fri, Aug 30, priced at $562 found 11 hours ago
Flights from Washington (IAD) to London (LHR)
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, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$410
Distance
3666 mi
Average flight time
12 hours 17 mins

Washington to London Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Washington to London offer the perfect respite. Not only does exploring London 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 Washington to London 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 IAD to LHR 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 London are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to London more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to London is $243 now!

Frequently asked questions

How much is a one-way flight from IAD to LHR?
You can bag one-way Washington flights to London starting from only $259. This info is based on the lowest price found on Expedia for this route departing within the next three months and was last updated on May 7 2024 and has not changed since. This specific airfare is for an Icelandair service, departing from Washington Dulles Intl. Airport (IAD) on July 30 2024 and arriving at Heathrow Airport (LHR).
How long does it take to fly from IAD to Heathrow Airport?
With United Airlines, a direct flight takes approximately 7 hours and 20 minutes. Take the 5:35PM flight from Dulles Intl. Airport and come in to land at London Heathrow at 5:55AM. Get your hands on an epic deal on this route when you use Expedia to book your journey.
Is it cheaper to buy a plane ticket from IAD to LHR last minute?
When it’s time to book your flights, it pays to be prepared. While you may be able to score a deal on an IAD to LHR flight at the last minute, fares usually don’t get cheaper as the date of departure nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to book a domestic flight is between 28 – 35 days ahead. For international flights it’s three to four months.
What is the cheapest airline flying from Dulles Intl. Airport to Heathrow Airport (LHR) in the next 90 days?
With fares starting from $259 for a flight from Washington to London, Icelandair is the cheapest airline found on Expedia. This price is based on airfares found on Expedia departing within the next 90 days and was updated on May 7 2024 and has not changed since. The flight takes off from Dulles Intl. Airport on July 30 2024 and arrives at LHR.
What's the cheapest price for a flight from Washington Dulles Intl. Airport (IAD) to London Heathrow next month?
The best price for a one-way flight from Washington to London within the next month is $459. If you plan to travel soon, lock in this fare before it’s gone. This price was found after looking at all available flights on Expedia departing within the next 30 days. This fare is for a one-way United flight journeying from Dulles Intl. Airport on May 20 2024 and touching down at Heathrow Airport (LHR). The price was last updated on May 7 2024 and has not changed since.
What airline has the least delays from IAD to LHR?
Depart with United Airlines from Dulles Intl. Airport to Heathrow Airport (LHR) and you’re more likely to land at the time found on your plane ticket. This airline clinches first place on this route, with 79% of services arriving on time. If there is a delay to your flight, the free Expedia App is a great way to stay in the loop. Download it and you’ll get real-time trip updates, from flight delays to gate number changes and which carousel to collect your luggage.
Can I find cheap nonstop flights from Dulles Intl. Airport to Heathrow Airport (LHR) in the next three months?
To give you an idea of fares, the lowest we could find for a roundtrip nonstop flight from Washington to London within the next 90 days is $640. This price was found after looking at available flights on Expedia with a departure date within the next three months. This airfare is for a flight via Virgin Atlantic leaving Washington Dulles Intl. Airport (IAD) on May 19 2024 and arriving at Heathrow Airport, with a return flight on September 25 2024. Pricing details were last updated on May 7 2024.It’s easy to locate nonstop cheap flights from IAD to Heathrow Airport (LHR) by making use of our filters. Start by keying in the details of your trip, then click on “Nonstop” under “Filter by” on the left side of the page. Your results will be organized with the lowest fare first. If you don’t have to travel on a set day, make use of our handy “Flexible dates” feature. You’ll be able to compare prices for surrounding days and snap up the best deal possible.
What airports do you fly into for London from Sterling?
From Sterling, you can travel to London via Heathrow Airport (LHR), London City Airport (LCY) and Gatwick Airport (LGW). Determine which terminal is more convenient for you before making your decision. If you go with Heathrow Airport (LHR), it’s approximately 14 mi west of the downtown area. Use the cash you save when booking your fare with Expedia to uncover the city’s popular attractions, such as Buckingham Palace and Big Ben.
What are the most popular departure times for flights from Dulles Intl. Airport to London Heathrow?
For Virgin Atlantic flights jetting from IAD to Heathrow Airport, the most popular departure times are between 6:00 PM - 7:00 PM. If you’d like to avoid any holdups, head out in the morning. This way you can avoid air traffic that builds up around airports in the afternoon and evening.
Can I change the date of my flight from IAD to Heathrow Airport (LHR)?
It’s a snap to make amendments to your IAD to Heathrow Airport (LHR) journey yourself. Just go to the Expedia Trips portal and hit “change flight.” Search for new flights and secure the one that works with your new plans. You’ll see an estimate of applicable flight change fees. You can also head to our Customer Service portal to chat to our Virtual Agent and get answers to your questions.
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