$791 Cheap Flights from London (LCY) to Washington (IAD)

View $791 flight on Wed, Dec 17, 2025Opens in a new window

Popular airlines from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD)

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Find available prices by choosing your travel dates.

Cheap Flights from London to Washington (LCY-IAD)

Prices were available within the past 7 days and start at $791 for one-way flights and $733 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Wed, May 14 - Sun, May 18
LCY
London
IAD
Washington
$733 Roundtrip, found 2 hours ago
$733
Roundtrip
found 2 hours ago
Select Swiss International Air Lines flight, departing Wed, May 14 from London to Washington, returning Sun, May 18, priced at $733 found 2 hours ago
Swiss International Air Lines
Thu, Sep 18 - Tue, Sep 23
LCY
London
IAD
Washington
$738 Roundtrip, found 1 day ago
$738
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Thu, Sep 18 from London to Washington, returning Tue, Sep 23, priced at $738 found 1 day ago
Lufthansa
Mon, May 12 - Mon, May 19
LCY
London
IAD
Washington
$749 Roundtrip, found 23 hours ago
$749
Roundtrip
found 23 hours ago
Select Lufthansa flight, departing Mon, May 12 from London to Washington, returning Mon, May 19, priced at $749 found 23 hours ago
Lufthansa
Tue, May 13 - Tue, May 20
LCY
London
IAD
Washington
$754 Roundtrip, found 1 day ago
$754
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Tue, May 13 from London to Washington, returning Tue, May 20, priced at $754 found 1 day ago
Swiss International Air Lines
Wed, May 14 - Sun, May 18
LCY
London
IAD
Washington
$756 Roundtrip, found 2 hours ago
$756
Roundtrip
found 2 hours ago
Select Swiss International Air Lines flight, departing Wed, May 14 from London to Washington, returning Sun, May 18, priced at $756 found 2 hours ago
Swiss International Air Lines
Wed, May 14 - Thu, May 22
LCY
London
IAD
Washington
$762 Roundtrip, found 3 days ago
$762
Roundtrip
found 3 days ago
Select Swiss International Air Lines flight, departing Wed, May 14 from London to Washington, returning Thu, May 22, priced at $762 found 3 days ago
Air Dolomiti
Wed, May 14 - Sun, May 18
LCY
London
IAD
Washington
$762 Roundtrip, found 2 hours ago
$762
Roundtrip
found 2 hours ago
Select Air Dolomiti flight, departing Wed, May 14 from London to Washington, returning Sun, May 18, priced at $762 found 2 hours ago
Swiss International Air Lines
Sat, Aug 30 - Wed, Sep 17
LCY
London
IAD
Washington
$764 Roundtrip, found 4 days ago
$764
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Sat, Aug 30 from London to Washington, returning Wed, Sep 17, priced at $764 found 4 days ago
Delta
Wed, Aug 27 - Wed, Sep 17
LCY
London
IAD
Washington
$789 Roundtrip, found 3 days ago
$789
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Aug 27 from London to Washington, returning Wed, Sep 17, priced at $789 found 3 days ago
Virgin Atlantic
Wed, Aug 27 - Wed, Sep 17
LCY
London
IAD
Washington
$789 Roundtrip, found 3 days ago
$789
Roundtrip
found 3 days ago
Select Virgin Atlantic flight, departing Wed, Aug 27 from London to Washington, returning Wed, Sep 17, priced at $789 found 3 days ago

Frequently asked questions

How much does a flight from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD) cost?
Discover the latest flight deals from LCY to IAD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from LCY to IAD?
The cheapest flights from LCY to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD)?
You can’t fly direct to Washington Dulles Intl. Airport (IAD) from London (LCY-London City). However, you can seamlessly travel to Washington without any layovers by taking off from Heathrow Airport (LHR).
What is the cheapest airline that flies from LCY to IAD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from LCY to IAD. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD)?
There are no daily direct flights departing from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you’ll be soaring above the clouds before you know it.
What day of the week has the most flights from LCY to IAD?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a range of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD)?
To avoid potential delays on the London City Airport (LCY) to Washington Dulles Intl. Airport (IAD) route, aim to fly before 3 PM. Later flights have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from LCY to IAD are typically more expensive. To secure the best prices, start searching for flights early. That being said, if you’re flexible with your travel plans, you may find a cheap fare right before your journey.
Is it cheaper to book a LCY to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a LCY to IAD flight and hotel package with Expedia could lead to significant savings. What’s more, managing everything in one place takes the hassle out of planning your trip. Just pick your flights and choose from our extensive range of stays, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from London City Airport (LCY) to Washington Dulles Intl. Airport (IAD)?
If you reserved your LCY to IAD flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you’d like more information.
*Available to One Key members.