Cheap Flights from Washington D.C. to London Heathrow

Compare Washington D.C. to London Heathrow flight deals

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Flight deals from Washington D.C. to London Heathrow

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

London.R 3,762 per passenger.Departing Sun, 12 Oct.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Baltimore Washington International on Sun, 12 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 3,762, select.

London.R 3,872 per passenger.Departing Sat, 2 Aug.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Washington Dulles on Sat, 2 Aug, arriving in London Heathrow.Price includes taxes and charges.From R 3,872, select.

London.R 3,876 per passenger.Departing Sat, 27 Sep.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Baltimore Washington International on Sat, 27 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 3,876, select.

London.R 3,887 per passenger.Departing Mon, 28 Jul.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Washington Dulles on Mon, 28 Jul, arriving in London Heathrow.Price includes taxes and charges.From R 3,887, select.

London.R 6,004 per passenger.Departing Tue, 4 Nov.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Baltimore Washington International on Tue, 4 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 6,004, select.

London.R 6,183 per passenger.Departing Tue, 24 Feb.One-way flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Tue, 24 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 6,183, select.

London.R 6,193 per passenger.Departing Wed, 1 Apr.One-way flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Wed, 1 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 6,193, select.

London.R 6,193 per passenger.Departing Wed, 25 Mar.One-way flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Wed, 25 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 6,193, select.

Find the cheapest month to fly from Washington D.C. to London Heathrow

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

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Direct flights from Washington D.C. to London Heathrow

Washington D.C. to London Heathrow: Alternative routes

Compare routes from Washington D.C. to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

Washington D.C. to London: Flight information

The things to know before you go.

Cheapest flight found	R 3,762
Cheapest month to fly	October
Average flight time	7 hrs, 18 mins
Most popular airline	American Airlines
Average flights per week	241

Finding cheap flights from Washington D.C. to London Heathrow: Frequently asked questions

How much are return flights from Washington D.C. to London Heathrow?

The best price we found for a return flight from Washington D.C. to London Heathrow is R 8,031. 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 D.C. to London Heathrow?

7 hours and 17 minutes is the average flight time from Washington D.C. to London Heathrow.

Which airlines fly direct from Washington D.C. to London Heathrow?

American Airlines, British Airways and Aer Lingus fly direct from Washington D.C. to London Heathrow.

How many flights are there a week from Washington D.C. to London Heathrow?

As of June 2025, there are 241 flights per week flying from Washington D.C. to London Heathrow.

When is the cheapest time to fly from Washington D.C. to London Heathrow?

The cheapest month to fly from Washington D.C. to London Heathrow is usually June 2025.

Which upcoming date is cheapest to fly from Washington D.C. to London Heathrow Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to London Heathrow Airport on Wednesday, 12 November 2025.

Can I get a direct flight from Washington D.C. to London Heathrow Airport?

Yes – the average flight time is 7 hours and 17 minutes.

How can I find the best flight deal to London Heathrow?

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 Heathrow 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.

Travelling from Washington DC to London Heathrow Airport (LHR): what you need to know

You can choose from a range of airports when organising your flight from Washington DC to London Heathrow Airport (LHR). Explore your options for jetting out of Ronald Reagan National Airport (DCA), Washington Dulles International Airport (IAD) and Baltimore/Wash International Thurgood Marshall Airport (BWI).
London is 4 hours ahead of Washington DC. London Heathrow Airport is located in London, which operates on the UTC+0 timezone.
With 56 direct flights a week between the two airports, Ronald Reagan National Airport (DCA) to London Heathrow Airport (LHR) is the most popular route. United operates the earliest flight at 08:30. If you'd like to make the most of your day before jetting off, the last flight from DCA to LHR is with United at 23:35.
To ensure you get on your flight from Washington DC to LHR, allow plenty of time to navigate the airport and find your gate. Turning up two hours before international departures and one hour before domestic flights is the general travel rule.
Popular months like July or holiday times such as Thanksgiving and Christmas will mean bigger lines at check-in and security. Be on the safe side and head to the terminal even earlier. Arriving two hours before domestic flights and up four hours ahead of international flights is wise.

Airports in Washington DC

Ronald Reagan National Airport (DCA)

Stopovers are the ideal opportunity to take a break from travelling — and maybe even explore another city. When browsing flights from Washington DC to LHR leaving from Ronald Reagan National Airport (DCA), uncheck the 'Direct flights only' box to see where you can stop along the way. Here are some popular options to consider:
- John F. Kennedy International Airport (JFK)
- Logan International Airport (BOS)
- Newark Liberty International Airport (EWR)
DCA is around 8 kilometres from central Washington DC. To help work out how to get there, use Google Maps. This useful travel app will show you the quickest route and your public transport options.
After a stress-free start to your trip? Stay near Ronald Reagan National Airport. Whether you're boarding an early flight from Washington DC to London Heathrow Airport or just don't like being rushed, these hotels are the answer:

Washington Dulles International Airport (IAD)

Looking to fly out of Washington Dulles International Airport (IAD)? You can book a direct flight from Washington DC to London Heathrow Airport (LHR) out of this popular hub.
Popular airlines that have direct flights from Washington DC to LHR setting off from IAD include:
Maximise your holiday with a stopover on your flight from Washington DC to London Heathrow Airport. Visit family or friends or cross another city off your list. Whatever you want to do, check out these options between Washington Dulles International Airport and LHR:
- Logan International Airport (BOS)
- Newark Liberty International Airport (EWR)
- Pearson International Airport (YYZ)
With public transport, you can travel from central Washington DC to IAD in about 3 hours and 26 minutes. The terminal is roughly 56 kilometres away, and getting there by car takes approximately 51 minutes.
Get a head start on your holiday with an extra night away from home. Before catching your flight from Washington DC to LHR, unwind in one of these hotels near Washington Dulles International Airport:

About London Heathrow Airport (LHR)

Consider staying in a hotel near LHR if you're taking a late flight from Washington DC to London Heathrow Airport. Check in to one of these accommodation options and avoid the hassle of a long transfer:

Getting from London Heathrow Airport (LHR) to central London

From London Heathrow Airport, London is approximately 31 kilometres away. It takes around 57 minutes to reach the centre driving.
Getting to the centre on public transport takes roughly 1 hour and 1 minute.

How to find the cheapest flights from Washington DC to London Heathrow Airport (LHR)

The best price we've seen for a one-way ticket from Washington DC to London Heathrow Airport is R 3,762. The cheapest price for a return flight is R 8,021. Remember fares can change due to availability at the time of booking.
It's often best to book in advance if you want to get cheap tickets from Washington DC to LHR. That's because flight prices are based on demand, which tends to increase closer to the departure date.
The 'Whole month' search tool shows you the cheapest tickets from Washington DC to London Heathrow Airport across each month. It's an easy way to find a bargain if your travel plans are flexible.
Create a Price Alert for cheap tickets from Washington DC to LHR. You don't need to check every day to see whether prices have dropped. We'll tell you the moment there's a change in price.
Customise your journey by applying filters. Adjust the number of stops, duration, and departure and arrival times to find the right flight from Washington DC to London Heathrow Airport. You can also sort the results to see the 'Fastest,' 'Cheapest' or 'Best' options first.

The best time to fly from Washington DC to London Heathrow Airport (LHR)

July is the most popular month to catch a flight from Washington DC to London Heathrow Airport while February is the quietest. To work out the ideal time to go to London, consider the pace you prefer to travel at.
When booking your flight from Washington DC to LHR, think about the kind of weather you enjoy. July is the warmest month in London, with the temperature ranging from 11ºC to 26ºC.
Look for cheap flights from Washington DC to London Heathrow Airport in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 0ºC and 9ºC on average.

More about London

Once you've booked your flight from Washington DC to London Heathrow Airport, think about where you'll stay in this city. Make one of these accommodation options your base for exploring London:
One of the best ways to experience London is to explore its top sights. Some highlights include Big Ben, The British Museum and Buckingham Palace.

Complete your London trip with a car rental

We use the same magic that helped you find your cheap flight from Washington DC to London Heathrow Airport to track down your ideal ride. Browse our car rentals in London and easily compare your options. Plus we give you all the info you need to know, from the most popular rental company to the average daily price.

Plan the rest of your trip from Washington D.C. to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.