£422 Cheap Flights from London (LGW) to Washington (IAD)

View £422 flight on Wed, 8 Jul 2026Opens in a new window

Flight 1

Popular airlines from Gatwick Airport (LGW) to Washington Dulles International Airport (IAD)

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Cheap Flights from London (LGW) to Washington (IAD)

Prices were available within the past 7 days and start at £422 for one-way flights and £458 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Tue, 1 Dec - Tue, 8 Dec
LGW
London
IAD
Washington
£458 Return, found 1 day ago
£458
Return
found 1 day ago
Select Icelandair flight, departing Tue, 1 Dec from London to Washington, returning Tue, 8 Dec, priced at £458 found 1 day ago
Icelandair
Mon, 11 Jan - Thu, 21 Jan
LGW
London
IAD
Washington
£458 Return, found 1 day ago
£458
Return
found 1 day ago
Select Icelandair flight, departing Mon, 11 Jan from London to Washington, returning Thu, 21 Jan, priced at £458 found 1 day ago
Icelandair
Mon, 5 Oct - Thu, 5 Nov
LGW
London
IAD
Washington
£459 Return, found 20 hours ago
£459
Return
found 20 hours ago
Select Icelandair flight, departing Mon, 5 Oct from London to Washington, returning Thu, 5 Nov, priced at £459 found 20 hours ago
Icelandair
Sat, 19 Sept - Sun, 4 Oct
LGW
London
IAD
Washington
£464 Return, found 3 days ago
£464
Return
found 3 days ago
Select Icelandair flight, departing Sat, 19 Sept from London to Washington, returning Sun, 4 Oct, priced at £464 found 3 days ago
Icelandair
Wed, 14 Oct - Sun, 18 Oct
LGW
London
IAD
Washington
£465 Return, found 1 day ago
£465
Return
found 1 day ago
Select Icelandair flight, departing Wed, 14 Oct from London to Washington, returning Sun, 18 Oct, priced at £465 found 1 day ago
Icelandair
Wed, 14 Oct - Wed, 11 Nov
LGW
London
IAD
Washington
£465 Return, found 3 days ago
£465
Return
found 3 days ago
Select Icelandair flight, departing Wed, 14 Oct from London to Washington, returning Wed, 11 Nov, priced at £465 found 3 days ago
Swiss International Air Lines
Mon, 5 Oct - Thu, 5 Nov
LGW
London
IAD
Washington
£507 Return, found 20 hours ago
£507
Return
found 20 hours ago
Select Swiss International Air Lines flight, departing Mon, 5 Oct from London to Washington, returning Thu, 5 Nov, priced at £507 found 20 hours ago
American Airlines
Wed, 11 Nov - Tue, 17 Nov
LGW
London
IAD
Washington
£515 Return, found 1 day ago
£515
Return
found 1 day ago
Select American Airlines flight, departing Wed, 11 Nov from London to Washington, returning Tue, 17 Nov, priced at £515 found 1 day ago
Air France
Thu, 19 Nov - Thu, 3 Dec
LGW
London
IAD
Washington
£537 Return, found 6 days ago
£537
Return
found 6 days ago
Select Air France flight, departing Thu, 19 Nov from London to Washington, returning Thu, 3 Dec, priced at £537 found 6 days ago
KLM
Tue, 1 Dec - Sun, 10 Jan
LGW
London
IAD
Washington
£539 Return, found 3 days ago
£539
Return
found 3 days ago
Select KLM flight, departing Tue, 1 Dec from London to Washington, returning Sun, 10 Jan, priced at £539 found 3 days ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £1,015
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city centre8 min
Flights from £1,015

Frequently asked questions

How much does a flight from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) cost?
One-way flights typically cost between £508 and £5,595 and return flights often range between £508 and £5,595. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
How do I find cheap flights from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 20 connecting flights per day from London Gatwick (LGW) to Washington, DC Washington Dulles Intl. (IAD). Some common connection points include Roissy-Charles de Gaulle (CDG), Dr. Francisco de Sa Carneiro (OPO), and Unknown (ZRH).
What is the earliest flight from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from London Gatwick (LGW) to Washington Dulles Intl. (IAD) typically departs at approximately 5:30 AM local time. This is a seasonal service active in June, operated by TK. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) on a Tuesday, with around 28 flights available. This gives you a good selection of options for your journey. Major airlines on this route include British Airways, Turkish Airlines, and TAP Portugal.
What are the most popular departure times for flights from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from London Gatwick (LGW) to Washington Dulles Intl. (IAD) are in the evening, from 6pm to 9pm. About 38% of passengers prefer this time. These times work well because you can finish your day in London and arrive in Washington, DC at a reasonable hour.
How long does it take to fly from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
A flight from LGW to IAD with a layover takes around 14 hours 20 minutes, with the route covering approximately 3,686 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for LGW to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Gatwick (LGW)?
When traveling from Gatwick (LGW) to Washington, you can fly into Ronald Reagan Washington National (DCA) and Washington Dulles Intl. (IAD). Some flights may connect through major hubs like Adolfo Suarez Madrid-Barajas (MAD), ZRH (ZRH), Keflavik Intl. (KEF) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your London (LGW-Gatwick) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Gatwick
Destination airport
Washington Dulles Intl.
Airlines serving
Air France, American Airlines, British Airways, Delta, Iberia, Icelandair, KLM, Royal Air Maroc, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Return price
£457
Distance
5896 km

Book with confidence

Compare flights from London to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Gatwick to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Gatwick (LGW) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from London to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Gatwick to Washington Dulles Intl. start at just £458 and range up to £539.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and Washington
  • booking your flight during December, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Gatwick to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to Washington easily and book with confidence

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