What’s the top layover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Reykjavik (KEF) – chosen by Cheapflights users on 42% of 1-stop itineraries from London to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $546.

How much does it cost to fly round-trip from London to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment. London to Washington, D.C. Dulles Intl Airport flights typically cost between $623 and $761 in September. The cheapest round-trip price found within the last 3 days was $534 on United Airlines (Sep 25-Sep 29).

Which airport typically offers the quickest layover for flights from London to Washington, D.C. Dulles Intl Airport?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 21m.

What’s the fastest layover option from London to Washington, D.C. Dulles Intl Airport?

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 00m.

How long is the flight from London to Washington, D.C. Dulles Intl Airport?

Airlines like United Airlines, SWISS, and TAP AIR PORTUGAL fly from London to Washington, D.C. Dulles Intl Airport in about 12h 40m. The time it takes to get you to your destination can typically vary by up to 20h 15m. The distance from London to Washington, D.C. Dulles Intl Airport is about 3664 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

Delta, at $320, was found to be the cheapest airline from London to Washington, D.C. Dulles Intl Airport.Alternate airlines to your destination round-trip include Scandinavian Airlines and Austrian Airlines. Delta is 58% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

One-way options have recently been found by users for as low as $521 on Aer Lingus. Other airlines that offer cheap prices include United Airlines from $532 and SWISS from $600 one-way.

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from London to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from London to Washington, D.C. Dulles Intl Airport (average of $292). Flying from London to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from London to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their London to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Washington, D.C. Dulles Intl Airport

The most flights from LON to IAD are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

While some choose either London Gatwick - Washington, D.C. Dulles Intl or London City - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C. Dulles Intl Airport.

What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?

Looking at all options, your cheapest flight can be booked for $564. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $440 on average, our data indicates $1,014 when flying from London to Washington, D.C. Dulles Intl Airport.

What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Washington, D.C. Dulles Intl Airport on time: KLM (90%), Air France (90%), Delta (90%).

What are the most popular airlines that fly from London to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from London to Washington, D.C. Dulles Intl Airport are American Airlines, Air Canada and British Airways. Something to consider prior to booking your flight.

What is the cheapest time of day to fly from LON to IAD?

When flying from London to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 15% versus a flight at noon.

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from London to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.

Can I find deals for business class flights from London to Dulles Intl?

Yes. Cheapflights offers flight deals from London to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$504+ Flights from London to Washington, D.C. Dulles Intl Airport

Round-trip from	$534 (United Airlines)
One-way from	$504 (Mytrip)
Popular in	July
Cheapest in	September
Average price	$669
Good round-trip deal	$653 or less
Good one-way deal	$685 or less

BA's Club Suite offers private pods with a door, ideal for long-haul comfort.

Heathrow's Terminal 5 simplifies BA connections, avoiding bus transfers.

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$320	Average$926	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$390	Average$833	FlexibilityNo cancel fee	On-time77%
Austrian Airlines	Cheapest$431	Average$984	FlexibilityNo cancel fee	On-time78%
TAP AIR PORTUGAL	Cheapest$473	Average$714	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$490	Average$672	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$562	Average$687	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$567	Average$826	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$595	Average$826	FlexibilityNo cancel fee	On-time70%
Air Canada	Cheapest$635	Average$663	FlexibilityNo cancel fee	On-time67%
Aer Lingus	Cheapest$649	Average$847	FlexibilityNo cancel fee	On-timeN/A

$504+ Cheap flights from London (LON) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from London to Washington, D.C. Dulles Intl are usually found in September or March, booked 64 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

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Cheapest flights from London to Dulles IntlExplore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 17, 2025.

Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 17, 2025.

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Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London with our price prediction graph.

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Everything you need to know about your flight from London to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from London to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from London to Dulles Intl. Price data was last updated on September 12, 2025.

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from LON to IAD?

Find hourly flight availability from London to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 17, 2025.

Weekly flight availability from London to Washington, D.C. Dulles Intl Airport

How much does it cost to fly round-trip from London to Washington, D.C. Dulles Intl Airport?

What’s the top layover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Share of 1-stop round-trip flights from London to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from London to Washington, D.C. Dulles Intl Airport?

Average round-trip fare for 1-stop flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from London to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for 1-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from London to Washington, D.C. Dulles Intl Airport?

Average layover duration for 1-stop one-way flights from London to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Dulles Intl

Related info for your journey

Find useful and relevant information for your journey from London to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from London to Washington, D.C. Dulles Intl Airport?

What are the cheapest airlines flying from London to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from London to Washington, D.C. Dulles Intl Airport one-way?

What are the most popular routes from London to Washington, D.C. Dulles Intl Airport?

What are the most reliable airlines from London to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from London to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from London to Dulles Intl that include hotel bookings?

How can I find direct flights from London to Dulles Intl?

Can I find deals for business class flights from London to Dulles Intl?

What is the cheapest month to book a flight from London to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Cheapest flights from London to Dulles Intl
Explore the most affordable flight options available from London to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 17, 2025.