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£352 Cheap Flights from London (STN) to Washington (IAD)

View £352 flight on Mon, 5 Oct 2026Opens in a new window

Popular airlines from Stansted Airport (STN) to Washington Dulles International Airport (IAD)

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

Prices were available within the past 7 days and start at £352 for one-way flights and £426 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Wed, 30 Sept - Tue, 6 Oct
STN
London
IAD
Washington
£426 Return, found 2 days ago
£426
Return
found 2 days ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Washington, returning Tue, 6 Oct, priced at £426 found 2 days ago
Lufthansa
Tue, 29 Sept - Tue, 6 Oct
STN
London
IAD
Washington
£427 Return, found 5 hours ago
£427
Return
found 5 hours ago
Select Lufthansa flight, departing Tue, 29 Sept from London to Washington, returning Tue, 6 Oct, priced at £427 found 5 hours ago
Lufthansa
Tue, 29 Sept - Mon, 5 Oct
STN
London
IAD
Washington
£433 Return, found 11 hours ago
£433
Return
found 11 hours ago
Select Lufthansa flight, departing Tue, 29 Sept from London to Washington, returning Mon, 5 Oct, priced at £433 found 11 hours ago
Lufthansa
Tue, 29 Sept - Mon, 5 Oct
STN
London
IAD
Washington
£437 Return, found 11 hours ago
£437
Return
found 11 hours ago
Select Lufthansa flight, departing Tue, 29 Sept from London to Washington, returning Mon, 5 Oct, priced at £437 found 11 hours ago
Lufthansa
Wed, 30 Sept - Tue, 6 Oct
STN
London
IAD
Washington
£437 Return, found 2 days ago
£437
Return
found 2 days ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Washington, returning Tue, 6 Oct, priced at £437 found 2 days ago
Lufthansa
Wed, 30 Sept - Mon, 5 Oct
STN
London
IAD
Washington
£440 Return, found 1 day ago
£440
Return
found 1 day ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Washington, returning Mon, 5 Oct, priced at £440 found 1 day ago
Royal Air Maroc
Fri, 30 Oct - Sun, 1 Nov
STN
London
IAD
Washington
£619 Return, found 2 days ago
£619
Return
found 2 days ago
Select Royal Air Maroc flight, departing Fri, 30 Oct from London to Washington, returning Sun, 1 Nov, priced at £619 found 2 days ago
Turkish Airlines
Wed, 30 Sept - Thu, 15 Oct
STN
London
IAD
Washington
£708 Return, found 11 hours ago
£708
Return
found 11 hours ago
Select Turkish Airlines flight, departing Wed, 30 Sept from London to Washington, returning Thu, 15 Oct, priced at £708 found 11 hours ago
Iberia
Sun, 9 Aug - Thu, 20 Aug
STN
London
IAD
Washington
£805 Return, found 2 days ago
£805
Return
found 2 days ago
Select Iberia flight, departing Sun, 9 Aug from London to Washington, returning Thu, 20 Aug, priced at £805 found 2 days ago
British Airways
Sun, 9 Aug - Thu, 20 Aug
STN
London
IAD
Washington
£835 Return, found 2 days ago
£835
Return
found 2 days ago
Select British Airways flight, departing Sun, 9 Aug from London to Washington, returning Thu, 20 Aug, priced at £835 found 2 days ago

Frequently asked questions

How much does a flight from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find one-way and return flights from STN to IAD with Expedia. 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 our cheapest fares first, and use the Price Tracking tool to receive alerts when STN to IAD ticket fares go up or down.
What is the cheapest month to fly from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest months to fly from STN to IAD are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter STN to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from London (STN-Stansted) 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 (STN-Stansted) 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 (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 3 connecting flights per day from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.). Some common connection points include Mohammed V (CMN), Istanbul Airport (IST), and Franz Josef Strauss Intl. (MUC).
What is the earliest flight from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from London Stansted (STN) to Washington, DC Washington Dulles Intl. (IAD) typically departs around 6:55 AM. This service is operated by Turkish Airlines. This is a seasonal service, active only in May. An early departure like this can help you make the most of 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 (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from London Stansted (STN) to Washington, DC Dulles International (IAD) on a Friday, with around 3 flights available. This gives you several flight options to choose from. Turkish Airlines offers service on this route.
What are the most popular departure times for flights from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Stansted (STN) to Washington Dulles Intl. (IAD) are in the early morning, from 6am to 9am. Turkish Airlines offers flights during this window. Many travellers prefer this time as it allows for an early start to their journey.
How long does it take to fly from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
There are no nonstop flights from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.). The distance between these two airports is approximately 5,934 kilometers. If you're looking for a flight with one stop, you can expect the journey to take around 16 hours 30 minutes. Flights with two or more stops typically take a bit longer, averaging about 18 hours 48 minutes. Keep in mind that these are average travel times, and your actual flight duration can vary depending on the specific route, layover times, and factors like wind patterns.
Can you fly business or first class from London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
You can fly business class between STN and IAD. You can fly business class with Turkish Airlines.
How do I earn miles on a London (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a London (STN-Stansted) 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, DC (IAD) from London (STN)?
If you're planning to travel to Washington from Stansted (STN), you can fly directly into Washington Dulles International Airport (IAD). 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 (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from London (STN-Stansted) 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 (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a London (STN-Stansted) 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 (STN-Stansted) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your London (STN-Stansted) 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
Stansted
Destination airport
Washington Dulles Intl.
Airlines serving
Lufthansa, Royal Air Maroc, Turkish Airlines
Return price
£425
Distance
5898 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 Stansted 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 Stansted (STN) 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 Stansted to Washington Dulles Intl. start at just £426 and range up to £1,035.  

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 September, 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 Stansted 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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