C$673 Cheap Flights from Washington Dulles to London

Compare Washington Dulles to London flight deals

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Flight deals from Washington Dulles to London

Looking for a cheap last-minute deal or the best round-trip flight from Washington Dulles to London? Find the lowest prices on one-way and round-trip tickets right here.

London.C$673 per passenger.Departing Sat, May 3, returning Sat, May 10.Round-trip flight with Austrian Airlines.Outbound indirect flight with Austrian Airlines, departing from Washington Dulles on Sat, May 3, arriving in London Heathrow.Inbound indirect flight with Austrian Airlines, departing from London Heathrow on Sat, May 10, arriving in Washington Dulles.Price includes taxes and charges.From C$673, select.

London.C$713 per passenger.Departing Tue, Apr 1, returning Wed, May 28.Round-trip flight with Frontier Airlines and Norse Atlantic Airways (UK).Outbound indirect flight with Frontier Airlines, departing from Washington Dulles on Tue, Apr 1, arriving in London Gatwick.Inbound indirect flight with Norse Atlantic Airways (UK), departing from London Gatwick on Wed, May 28, arriving in Washington Dulles.Price includes taxes and charges.From C$713, select.

London.C$749 per passenger.Departing Tue, Sep 2, returning Sat, Sep 6.Round-trip flight with SWISS.Outbound indirect flight with SWISS, departing from Washington Dulles on Tue, Sep 2, arriving in London City.Inbound indirect flight with SWISS, departing from London Heathrow on Sat, Sep 6, arriving in Washington Dulles.Price includes taxes and charges.From C$749, select.

London.C$768 per passenger.Departing Sat, Apr 5, returning Mon, Apr 7.Round-trip flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departing from Washington Dulles on Sat, Apr 5, arriving in London Heathrow.Inbound indirect flight with Scandinavian Airlines, departing from London Heathrow on Mon, Apr 7, arriving in Washington Dulles.Price includes taxes and charges.From C$768, select.

London.C$773 per passenger.Departing Mon, Nov 10, returning Sun, Nov 16.Round-trip flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Mon, Nov 10, arriving in London Gatwick.Inbound indirect flight with Icelandair, departing from London Gatwick on Sun, Nov 16, arriving in Washington Dulles.Price includes taxes and charges.From C$773, select.

London.C$774 per passenger.Departing Tue, Oct 21, returning Sat, Nov 8.Round-trip flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Tue, Oct 21, arriving in London Heathrow.Inbound indirect flight with Icelandair, departing from London Gatwick on Sat, Nov 8, arriving in Washington Dulles.Price includes taxes and charges.From C$774, select.

London.C$774 per passenger.Departing Mon, Dec 1, returning Fri, Dec 5.Round-trip flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Mon, Dec 1, arriving in London Gatwick.Inbound indirect flight with Icelandair, departing from London Gatwick on Fri, Dec 5, arriving in Washington Dulles.Price includes taxes and charges.From C$774, select.

London.C$776 per passenger.Departing Fri, Nov 28, returning Sat, Dec 6.Round-trip flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Fri, Nov 28, arriving in London Gatwick.Inbound indirect flight with Icelandair, departing from London Gatwick on Sat, Dec 6, arriving in Washington Dulles.Price includes taxes and charges.From C$776, select.

Find the cheapest month to fly from Washington Dulles to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to London flights are currently cheapest in May.

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Direct flights from Washington Dulles to London

Alternative Washington Dulles to London routes

Looking for the cheapest, fastest or easiest route from Washington Dulles to London? You could fly into the following airports instead.

Washington, D.C. to London: Flight information

The things to know before you go.

Cheapest flight found	C$673
Cheapest month to fly	May
Average flight time	7 hrs, 23 mins
Most popular airline	American Airlines
Average flights per week	502

Finding cheap flights from Washington Dulles to London: Frequently asked questions

How many airports are there in London?

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.

How much are round-trip flights from Washington Dulles to London?

The best price we found for a round-trip flight from Washington Dulles to London is C$673. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Washington Dulles to London?

7 hours and 23 minutes is the average flight time from Washington Dulles to London.

Which airlines fly direct from Washington Dulles to London?

American Airlines, British Airways and KLM fly direct from Washington Dulles to London.

How many flights are there a week from Washington Dulles to London?

There are 251 flights per week flying from Washington Dulles to London, as of March 2025.

When is the cheapest time to fly from Washington Dulles to London?

The cheapest month to fly from Washington Dulles to London is usually March 2025.

What's the cheapest airport to fly to in London?

If you're flying from Washington Dulles Airport, the cheapest airport near London is London Heathrow – which is 22.9 km away from the center of London. We've found flights to this airport from C$673.

Which upcoming date is cheapest to fly from Washington Dulles Airport to London on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to London on Saturday, May 3, 2025.

Can I get a direct flight from Washington Dulles Airport to London?

Yes – the average flight time is 7 hours and 23 minutes.

How can I get the best flight deal from Washington Dulles Airport to London?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to London?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in London?

In March, the average temperature is usually around 6°C. August is typically the warmest month in London, when it usually averages around 22°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 1°C. The rainiest month is October.

Which is the cheapest airline to fly with from Washington Dulles Airport to London?

Currently, Austrian Airlines and Iberia offer the cheapest flight tickets to London.

How to find cheap flights to London from Washington Dulles

Looking for cheap tickets from Washington Dulles to London? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

Simply hit "search." From Delta Air Lines to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Washington Dulles to London. And with us, there are no hidden fees – what you see is what you pay.
Compare flight deals to London from Washington Dulles from over 1,000 providers. Then choose the cheapest plane tickets or fastest journeys.
Flex your dates to find the best Washington Dulles–London ticket prices. If you're flexible when it comes to your travel dates, use Skyscanner's "Whole month" tool to find the cheapest month, and even day to fly to London from Washington Dulles.
Set up a Price Alert. You can easily track the fare of your cheap Washington Dulles–London flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
Fly without stops. Only interested in direct flights between Washington Dulles and London? Make sure to tick "Direct flights only" when performing a search. If there are direct flights available on the route, these will appear in the results.
Find the cheapest Business Class flights from Washington Dulles and London. We scour the Internet for the best Business, Premium Economy and First Class flight fares to London, too. Check the difference in price as you search – you might just stumble on a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
Include nearby airports in your search. Widen your search for Washington Dulles to London flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save the next time you travel.

Combine your flight to London from Washington Dulles with hotels and car rental

Once you've secured your cheap flight ticket from Washington Dulles to London, discover the best prices and exclusive rates for hotels in London or nearby. You can also compare hundreds of car rental companies at once so you get the best car rental price for your trip.