Cheap flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from $328
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport departing on 5/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London Heathrow Airport to Washington, D.C.
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Cheap bus & train deals from London Heathrow Airport to Washington, D.C.
All round-trip flight deals from London Heathrow Airport to Washington, D.C.
Delta flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Our best Delta deals on London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Our best United Airlines deals on London Heathrow Airport to Washington, D.C. Dulles Intl Airport flight tickets
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?
In general, January is the cheapest month to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $697. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $701.
What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?
Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $762. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Washington, D.C. Dulles Intl Airport for around $874.
What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?
Flying to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $938 on average. Flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest London Heathrow to Washington, D.C. Dulles Intl flight route?
Fly from London Heathrow to Washington, D.C. Dulles Intl for the best London Heathrow - Washington, D.C. Dulles Intl flight prices
How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?
You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $819 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport for as low as $739 on momondo.
What cabin class options are available on London Heathrow to Washington, D.C. Dulles Intl flights?
There are 4 cabin classes available to choose from on London Heathrow to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from London Heathrow to Washington, D.C. Dulles Intl?
Icelandair, Aer Lingus, and TAP AIR PORTUGAL are the most popular carriers operating from London Heathrow to Washington, D.C. Dulles Intl
What airlines fly to Washington, D.C. Dulles Intl Airport?
British Airways, United Airlines and Lufthansa are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 13 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on average per day?
As of January 2025, 23 flights take off from London Heathrow Airport and land in Washington, D.C. Dulles Intl Airport each day. The most common flight departure time for this route is 12:00PM, with 100% of daily flights taking off in the afternoon.
How many flights depart from London Heathrow Airport to Washington, D.C. Dulles Intl Airport on average per week?
As of January 2025, 163 flights take off from London Heathrow Airport and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.
When to book flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Cheap London Heathrow Airport to Washington, D.C. Dulles Intl Airport (LHR to IAD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
How far is London Heathrow to Washington, D.C. Dulles Intl by plane?
The distance between London Heathrow and Washington, D.C. Dulles Intl is about 3664.4 mi. In terms of flight time, this usually takes a little over 8h 10m.
When did momondo last update prices for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Prices for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
The number of operators available for flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is 13 as of January 2025.
How old do you have to be to fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C. Dulles Intl Airport.
What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?
The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is Boeing 777, representing 29.13% of all bookings. The subsequent popular models are Airbus A350-1000 at 14.95%, Boeing 787-9 Dreamliner at 12.94%, and Boeing 767-300 at 10.53%.
What is the most popular airline from London Heathrow Airport to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London Heathrow Airport to Washington, D.C. Dulles Intl Airport is British Airways (25% of total bookings). The next most popular airlines are United Airlines (15%), Lufthansa (10%), and Aer Lingus (10%).
Best airlines flying from London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. Dulles Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $348 | Free Cancellation | Rating 7.1 92 reviews | |||
| PriceFrom $390 | Free Cancellation | Rating 7.3 1,308 reviews | |||
| PriceFrom $510 | Free Cancellation | Rating 7.1 501 reviews | |||
| PriceFrom $511 | Free Cancellation | Rating 7.1 1,077 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.0 2,640 reviews | |||
| PriceFrom $608 | Free Cancellation | Rating 7.5 786 reviews | |||
| PriceFrom $619 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $622 | Free Cancellation | Rating 6.6 6,823 reviews | |||
| PriceFrom $628 | Free Cancellation | Rating 7.4 8,965 reviews | |||
| PriceFrom $652 | Free Cancellation | Rating 8.0 8,511 reviews |
Delta Flights From London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Delta operates around 5 flights from London Heathrow Airport to Washington, D.C. Dulles Intl Airport every week. The average price of these flights found in the last 72 hours has been $1,005, but momondo users have found Delta deals from London Heathrow Airport to Washington, D.C. Dulles Intl Airport from as low as $652 round-trip. Delta has been scored 8.0/10 in 8,511 reviews.
Austrian Airlines Flights From London Heathrow Airport to Washington, D.C. Dulles Intl Airport
Austrian Airlines is also a popular choice for this route. Austrian Airlines flight deals for London Heathrow Airport to Washington, D.C. Dulles Intl Airport start from as low as $608 round-trip, depending on your selected dates, with average Austrian Airlines deals seen on momondo around $858. Austrian Airlines operates 14 flights to Washington, D.C. Dulles Intl Airport from London Heathrow Airport in an average week. Users have rated it 7.5/10 across 786 reviews.
Traveling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from London to Washington, D.C.?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.
Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?
All flight searches from London to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from London to Washington, D.C.?
Once you have performed a search for London to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.