£281 Cheap Flights from Washington (IAD) to London (LGW)

View £281 flight on Sat, 21 Nov 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £281 for one-way flights and £478 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Mon, 16 Nov - Sun, 22 Nov
IAD
Washington
LGW
London
£478 Return, found 5 days ago
£478
Return
found 5 days ago
Select TAP Portugal flight, departing Mon, 16 Nov from Washington to London, returning Sun, 22 Nov, priced at £478 found 5 days ago
TAP Portugal
Sat, 28 Nov - Mon, 7 Dec
IAD
Washington
LGW
London
£480 Return, found 1 day ago
£480
Return
found 1 day ago
Select TAP Portugal flight, departing Sat, 28 Nov from Washington to London, returning Mon, 7 Dec, priced at £480 found 1 day ago
TAP Portugal
Mon, 16 Nov - Sun, 22 Nov
IAD
Washington
LGW
London
£484 Return, found 5 days ago
£484
Return
found 5 days ago
Select TAP Portugal flight, departing Mon, 16 Nov from Washington to London, returning Sun, 22 Nov, priced at £484 found 5 days ago
TAP Portugal
Thu, 12 Nov - Thu, 19 Nov
IAD
Washington
LGW
London
£486 Return, found 20 hours ago
£486
Return
found 20 hours ago
Select TAP Portugal flight, departing Thu, 12 Nov from Washington to London, returning Thu, 19 Nov, priced at £486 found 20 hours ago
Icelandair
Fri, 2 Oct - Sun, 11 Oct
IAD
Washington
LGW
London
£545 Return, found 6 days ago
£545
Return
found 6 days ago
Select Icelandair flight, departing Fri, 2 Oct from Washington to London, returning Sun, 11 Oct, priced at £545 found 6 days ago
TAP Portugal
Thu, 12 Nov - Thu, 26 Nov
IAD
Washington
LGW
London
£546 Return, found 5 days ago
£546
Return
found 5 days ago
Select TAP Portugal flight, departing Thu, 12 Nov from Washington to London, returning Thu, 26 Nov, priced at £546 found 5 days ago
TAP Portugal
Mon, 16 Nov - Sun, 22 Nov
IAD
Washington
LGW
London
£550 Return, found 5 days ago
£550
Return
found 5 days ago
Select TAP Portugal flight, departing Mon, 16 Nov from Washington to London, returning Sun, 22 Nov, priced at £550 found 5 days ago
American Airlines
Tue, 16 Feb - Tue, 23 Feb
IAD
Washington
LGW
London
£624 Return, found 5 days ago
£624
Return
found 5 days ago
Select American Airlines flight, departing Tue, 16 Feb from Washington to London, returning Tue, 23 Feb, priced at £624 found 5 days ago
Royal Air Maroc
Mon, 12 Oct - Thu, 15 Oct
IAD
Washington
LGW
London
£633 Return, found 4 days ago
£633
Return
found 4 days ago
Select Royal Air Maroc flight, departing Mon, 12 Oct from Washington to London, returning Thu, 15 Oct, priced at £633 found 4 days ago
Swiss International Air Lines
Sun, 16 Aug - Mon, 24 Aug
IAD
Washington
LGW
London
£634 Return, found 6 days ago
£634
Return
found 6 days ago
Select Swiss International Air Lines flight, departing Sun, 16 Aug from Washington to London, returning Mon, 24 Aug, priced at £634 found 6 days ago

Alternative airports near London

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

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city centre is 28 minutes. Flights from £833
LHR
Heathrow
Cheapest
Average driving time to city centre28 min
Flights from £833
Select flight to London City LCY. Closest option available. Average driving time to city centre is 21 minutes. Flights from £867
LCY
London City
Closest
Average driving time to city centre21 min
Flights from £867

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) cost?
One-way flights typically cost between £330 and £5,892 and return flights often range between £330 and £5,892. 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.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
August is typically the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick), with average return fares of approximately £453. This is about 27% lower than the average price throughout the year. August can offer lower prices as it's often a shoulder season for international travel, after the peak summer rush but before the autumn business travel picks up. Other cheap months to fly from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) include March and July.*Averages based on flights available on Expedia in the last year.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick), 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
Based on booking data from the past year, if you're looking for the best time to fly from Washington Dulles Intl. (IAD) to London Gatwick (LGW), you'll find the cheapest fares in August and March, with average return flights around £453. February is a popular month for travel, meaning you'll have plenty of flight options, though it might not be the absolute cheapest. To get the best value, consider flying in August or March for lower prices, and you can still find good flight availability.*Prices based on flights available on Expedia in the last year.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
There are approximately 49 connecting flights per day from Washington Dulles Intl. (IAD) to Gatwick (LGW). Some common connection points include Charlotte-Douglas Intl. (CLT), Humberto Delgado (LIS), and Pearson Intl. (YYZ).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
The earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) typically departs at approximately 5:00 AM local time. This service is operated by American Airlines and British Airways, and it is a seasonal service active in April. 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to Gatwick (LGW) on a Tuesday, with around 47 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Aer Lingus, and Delta Air Lines. Flight options are notably more plentiful on Tuesdays and Wednesdays compared to other days of the week.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
The most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) are in the evening, from 6pm to 9pm. About 27% of passengers prefer this time. Many major carriers, including Icelandair, United Airlines and SWISS, offer flights during this window. This timing works well because you can finish your day in Washington, DC, catch an evening flight, and arrive in London ready to start your day.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
A flight from IAD to LGW with a layover takes around 13 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
Select the "Business class" and "First class" filters when looking for IAD to LGW 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) 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 London from Washington Dulles Intl. (IAD)?
From Washington Dulles Intl. (IAD), you can fly into London Intl. (YXU), Heathrow (LHR), London City (LCY) and Gatwick (LGW) in London. Some flights may connect through major hubs like Liberty Intl. (EWR), O'Hare Intl. (ORD), LaGuardia (LGA) before reaching London. 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) 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 Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to London (LGW-Gatwick) 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
Washington Dulles Intl.
Destination airport
Gatwick
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
£478
Distance
5896 km

Book with confidence

Compare flights from Washington to London easily and book with confidence

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

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 Washington Dulles Intl. (IAD) to Gatwick (LGW)

The easiest way to view the best deals on flights from Washington to London 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 Washington Dulles Intl. to Gatwick start at just £478 and range up to £634.  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Gatwick 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 Washington to London easily and book with confidence

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