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Cheap Flights from Washington D.C. (DCA) to London (LHR)

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Compare Washington Ronald Reagan to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

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Flight deals from Washington Ronald Reagan to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Washington Ronald Reagan to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.$915 per passenger.Departing Wed, 13 Aug, returning Wed, 20 Aug.Return flight with KLM.Outbound indirect flight with KLM, departs from Washington Ronald Reagan on Wed, 13 Aug, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Wed, 20 Aug, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $915, select.
London.$918 per passenger.Departing Tue, 30 Sep, returning Tue, 7 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Washington Ronald Reagan on Tue, 30 Sep, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Tue, 7 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $918, select.
London.$928 per passenger.Departing Wed, 12 Nov, returning Tue, 18 Nov.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Washington Ronald Reagan on Wed, 12 Nov, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Tue, 18 Nov, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $928, select.
London.$928 per passenger.Departing Wed, 8 Oct, returning Wed, 29 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Wed, 8 Oct, arriving in London Heathrow.Inbound indirect flight with Delta, departs from London Heathrow on Wed, 29 Oct, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $928, select.
London.$928 per passenger.Departing Wed, 3 Sep, returning Wed, 10 Sep.Return flight with Finnair.Outbound indirect flight with Finnair, departs from Washington Ronald Reagan on Wed, 3 Sep, arriving in London Heathrow.Inbound indirect flight with Finnair, departs from London Heathrow on Wed, 10 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $928, select.
London.$929 per passenger.Departing Wed, 14 Jan, returning Tue, 20 Jan.Return flight with Air France.Outbound indirect flight with Air France, departs from Washington Ronald Reagan on Wed, 14 Jan, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Tue, 20 Jan, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $929, select.
London.$929 per passenger.Departing Mon, 11 Aug, returning Wed, 3 Sep.Return flight with Finnair.Outbound indirect flight with Finnair, departs from Washington Ronald Reagan on Mon, 11 Aug, arriving in London Heathrow.Inbound indirect flight with Finnair, departs from London Heathrow on Wed, 3 Sep, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $929, select.
London.$929 per passenger.Departing Wed, 29 Oct, returning Wed, 5 Nov.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Washington Ronald Reagan on Wed, 29 Oct, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Wed, 5 Nov, arriving in Washington Ronald Reagan.Price includes taxes and charges.From $929, select.

Find the cheapest month to fly from Washington Ronald Reagan to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Ronald Reagan to London Heathrow flights are currently cheapest in August.
May
from $1,597
Jun
from $1,235
Jul
from $1,202
Aug
from $915
Sep
from $928
Oct
from $928
Nov
from $928
Dec
from $934
Jan
from $929
Feb
Find prices
Mar
from $989
Apr
from $1,092

Washington Ronald Reagan to London Heathrow: Alternative routes

Compare routes from Washington Ronald Reagan 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$915
Cheapest month to flyAugust

Finding cheap flights from Washington Ronald Reagan to London Heathrow: Frequently asked questions

The best price we found for a return flight from Washington Ronald Reagan to London Heathrow is $915. 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.
Currently, there are no airlines that fly direct from Washington Ronald Reagan to London Heathrow. But we found flights with one or more stops from $915.
As of May 2025, there are no flights flying from Washington Ronald Reagan to London Heathrow.
The cheapest month to fly from Washington Ronald Reagan to London Heathrow is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Ronald Reagan Airport to London Heathrow Airport on Wednesday, 13 August 2025.
No airlines currently offer direct flights between Washington Ronald Reagan Airport and London Heathrow Airport. Most routes have one or more stops.
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.
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.
Currently, KLM offers the cheapest flight tickets to London Heathrow.

Flying from Ronald Reagan National Airport (DCA) to London Heathrow Airport (LHR): what you need to know

  • The timezone in London is UTC+0, which is four hours ahead of Washington DC.

  • Your DCA to LHR flight won't wait if you're running late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • Flying during a peak time such as February? Public holidays and other high seasons can lead to longer queues at security. Be extra cautious and get there up to four hours ahead of international flights and two hours before domestic departures.

  • If you'd like to add a stop to your trip, just deselect 'Direct flights only' when searching for your ticket from Ronald Reagan National Airport to London Heathrow Airport. Here are the most popular stopovers between DCA and LHR:

    • Logan International Airport

    • John F. Kennedy International Airport

    • Newark Liberty International Airport

How to find the cheapest flights from Ronald Reagan National Airport (DCA) to London Heathrow Airport (LHR)

  • The lowest price we've seen for a one-way Ronald Reagan National Airport to London Heathrow Airport flight is $386. A return ticket is currently $915. Depending on the availability and when you book, these fares could change.

  • Don't wait until the last moment. You're more likely to find cheap tickets from DCA to LHR if you book ahead. Airlines often have some fantastic early bird deals.

  • Finding cheap flights from Ronald Reagan National Airport to London Heathrow Airport is easy if you can be flexible with your dates. Use the 'Whole month' search function to see the lowest fares throughout the month and bag a great deal.

  • You won't have to check back in every day to see if fares have dropped when you set up a Price Alert. We'll update you as soon as a special offer becomes available on cheap flights from DCA to LHR.

  • Tailor your trip using filters. Choose your preferred arrival and departure times, total journey duration and airlines. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Ronald Reagan National Airport to London Heathrow Airport.

Handy information about Ronald Reagan National Airport (DCA)

  • The address for DCA is 1 Aviation Circle.

  • When it comes to Ronald Reagan National Airport's on-time performance, 76.44% of flights complete their journey on time.

  • Ronald Reagan National Airport is around 8 kilometres from central Washington DC. If you're driving, ride-sharing or catching a cab from the centre, it'll take 15 minutes or so to get there, depending on the traffic.

  • The trip on public transport takes about 45 minutes.

  • Need a handy hotel close to DCA? If you're catching an early flight from Ronald Reagan National Airport to London Heathrow Airport, these stays will have you moments from your departure gate:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport is roughly 31 kilometres from central London. Driving there takes about 55 minutes.

  • Travelling to the centre on public transport will take you around 1 hour.

When to fly to London Heathrow Airport (LHR)

  • The quietest month for a flight from Ronald Reagan National Airport to London Heathrow Airport is February, while July is the busiest. Choose the ideal time to visit London based on whether you prefer a more fast-paced or easygoing experience.

  • Before locking in your flight from Ronald Reagan National Airport to London Heathrow Airport, think about the type of weather you enjoy. July is the warmest month in London, with the temperature ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • January sees average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Look for cheap tickets from DCA to LHR around that time if you like travelling in cooler conditions.

Explore more of United Kingdom

  • London is easy to fall in love with, but there are so many other parts of United Kingdom just waiting to be discovered. Around 161 kilometres north-west of London, a trip to Birmingham will keep you on the move. Start with leading attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Bristol is another favourite destination in United Kingdom and is around 177 kilometres west of London. No journey is complete without dropping by Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.

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.