Question 1

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

Accepted Answer

Currently priced at £487, Austrian Airlines will fly you from London Heathrow Airport to Washington, D.C. Dulles Intl Airport and back. In addition to Austrian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Lufthansa - these airlines can fly you to your destination from £487 and £488, respectively. Austrian Airlines is currently priced 21% below the average price you’ll pay for this route.

Question 2

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

Accepted Answer

One-way options have recently been found by users for as low as £337 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from £393 and Lufthansa from £467 one-way.

Question 3

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

Accepted Answer

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport, you should look to book at least 68 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 4

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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.

Question 5

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

Accepted Answer

Travellers seeking maximum savings on their London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday evenings 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.

Question 6

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

Accepted Answer

The most flights from LHR to IAD are scheduled on a Wednesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Question 8

E

Accepted Answer

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Question 9

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

Accepted Answer

On average you can expect to pay £1,257 for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £368 while the most popular route, (London Heathrow - Washington, D.C. Dulles Intl) is currently priced at £427.

Question 10

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

Accepted Answer

Consider United Airlines (92%), Air Canada (89%) or Austrian Airlines (89%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.

Question 11

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

Accepted Answer

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

Question 12

Where are the most common stopover locations when flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Flights departing from London Heathrow Airport and landing in Washington, D.C. Dulles Intl Airport stopover in Dublin most frequently.

Question 13

Where are the least popular stopover locations for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights?

Accepted Answer

Of the flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport that have stopovers, the fewest flights stop in Reykjavik.

Question 14

What are some popular things to do or see while on a stopover in Dublin?

Accepted Answer

Dublin travellers tend to visit Bord Gáis Energy Theatre, 3Olympia Theatre, and Button Factory more than anywhere else. Bord Gáis Energy Theatre, 3Olympia Theatre, and Button Factory are located about 5.7 mi, 5.7 mi, and 5.7 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £20.

Question 15

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

Accepted Answer

Saturday flights are found to be more expensive to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

Question 16

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

Accepted Answer

To save up to 35% on this flight, we recommend booking at least 50 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £543 1-2 weeks out and tickets from £698 for flights departing within the next 72 hours.

Question 17

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

Accepted Answer

The best pricing can be found in the month of February. Prices to Washington, D.C. Dulles Intl Airport from London Heathrow Airport average £552. You can even find prices in February for less than £552, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as £229. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from London Heathrow Airport. Flying in the targeted month can save you up to 17%.

Question 18

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

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport in the evening. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight in the afternoon.

Question 19

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

Accepted Answer

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

Question 20

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

Accepted Answer

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

Question 21

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

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow 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.

Question 22

How does Cheapflights help users find flights from Heathrow to Dulles Intl?

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 23

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Dulles Intl?

Accepted Answer

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Dulles Intl.

Question 24

Can Cheapflights find flights from Heathrow to Dulles Intl with no change fees?

Accepted Answer

Need flexible booking options for your flight to Dulles Intl from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 25

Can Cheapflights notify me if prices for flights from Heathrow to Dulles Intl become cheaper?

Accepted Answer

Yes! Start tracking prices for Heathrow to Dulles Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	£487
One-way from	£311
Popular in	August
Cheapest in	February
Average price	£586
Good round-trip deal	£537 or less
Good one-way deal	£629 or less

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£190	Average£557	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£283	Average£471	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Brussels Airlines	Cheapest£384	Average£720	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Icelandair	Cheapest£385	Average£516	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£393	Average£562	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Scandinavian Airlines	Cheapest£441	Average£584	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Air France	Cheapest£443	Average£617	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Finnair	Cheapest£450	Average£613	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
British Airways	Cheapest£468	Average£623	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£469	Average£674	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from £311

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. Dulles Intl are usually found in February or March, booked 68 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from Heathrow to Dulles Intl

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Cheapest flights from Heathrow to Dulles IntlExplore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 May 2025.

Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 May 2025.

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Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Heathrow to Dulles Intl

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Dulles Intl. Price data was last updated on 2 May 2025.

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

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

Find hourly flight availability from Heathrow 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 8 May 2025.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Dulles Intl. Price data was last updated on 5 May 2025.

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

Explore weekly flight availability from Heathrow to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 8 May 2025.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from London to Washington, D.C. to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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

Where are the most common stopover locations when flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?

What are some popular things to do or see while on a stopover in Dublin?

Where are the least popular stopover locations for London Heathrow Airport to Washington, D.C. Dulles Intl Airport flights?

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

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

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

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

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Fly from Heathrow to Dulles Intl on these airlines

Choose from the following airlines for your flight from Heathrow to Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on 8 May 2025.

Top 10 airlines flying from Heathrow to Dulles Intl

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How does Cheapflights help users find flights from Heathrow to Dulles Intl?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Dulles Intl?

Can Cheapflights find flights from Heathrow to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Dulles Intl become cheaper?

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Cheapest flights from Heathrow to Dulles Intl
Explore the most affordable flight options available from Heathrow to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 May 2025.