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Cheap Flights from Washington, D.C. to Harmondsworth

Compare Washington, D.C. to Harmondsworth flight deals

Find the cheapest month or even day of the year to fly to Harmondsworth

Book the best Harmondsworth fare with no extra fees

Flight deals from Washington, D.C. to Harmondsworth

Looking for a cheap last-minute deal or the best round-trip flight from Washington, D.C. to Harmondsworth? Find the lowest prices on one-way and round-trip tickets right here.
London.AED 977 per passenger.Departing Tue, Jul 21.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Tue, Jul 21, arriving in London Heathrow.Price includes taxes and charges.From AED 977, select.
London.AED 985 per passenger.Departing Thu, Jan 21.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Baltimore Washington International on Thu, Jan 21, arriving in London Heathrow.Price includes taxes and charges.From AED 985, select.
London.AED 986 per passenger.Departing Sat, Oct 24.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Sat, Oct 24, arriving in London Heathrow.Price includes taxes and charges.From AED 986, select.
London.AED 1,001 per passenger.Departing Fri, Aug 28.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Fri, Aug 28, arriving in London Heathrow.Price includes taxes and charges.From AED 1,001, select.
London.AED 1,015 per passenger.Departing Sat, May 1.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Sat, May 1, arriving in London Heathrow.Price includes taxes and charges.From AED 1,015, select.
London.AED 1,018 per passenger.Departing Tue, Feb 16.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Baltimore Washington International on Tue, Feb 16, arriving in London Heathrow.Price includes taxes and charges.From AED 1,018, select.
London.AED 1,020 per passenger.Departing Mon, Sep 21.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Baltimore Washington International on Mon, Sep 21, arriving in London Heathrow.Price includes taxes and charges.From AED 1,020, select.
London.AED 1,049 per passenger.Departing Tue, Nov 3.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Tue, Nov 3, arriving in London Heathrow.Price includes taxes and charges.From AED 1,049, select.
London.AED 1,049 per passenger.Departing Wed, Mar 3.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Washington Dulles on Wed, Mar 3, arriving in London Heathrow.Price includes taxes and charges.From AED 1,049, select.
London.AED 1,066 per passenger.Departing Wed, Dec 30.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Baltimore Washington International on Wed, Dec 30, arriving in London Heathrow.Price includes taxes and charges.From AED 1,066, select.
London.AED 1,068 per passenger.Departing Fri, Apr 2.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departing from Baltimore Washington International on Fri, Apr 2, arriving in London Heathrow.Price includes taxes and charges.From AED 1,068, select.
London.AED 1,129 per passenger.Departing Mon, Oct 19.One-way flight with Finnair.Outbound direct flight with Finnair departing from Washington Dulles on Mon, Oct 19, arriving in London Heathrow.Price includes taxes and charges.From AED 1,129, select.
London.AED 1,139 per passenger.Departing Mon, Nov 23.One-way flight with Finnair.Outbound direct flight with Finnair departing from Baltimore Washington International on Mon, Nov 23, arriving in London Heathrow.Price includes taxes and charges.From AED 1,139, select.
London.AED 1,143 per passenger.Departing Tue, Feb 16.One-way flight with Virgin Atlantic.Outbound direct flight with Virgin Atlantic departing from Washington Dulles on Tue, Feb 16, arriving in London Heathrow.Price includes taxes and charges.From AED 1,143, select.
London.AED 1,181 per passenger.Departing Wed, Dec 30.One-way flight with Virgin Atlantic.Outbound direct flight with Virgin Atlantic departing from Washington Dulles on Wed, Dec 30, arriving in London Heathrow.Price includes taxes and charges.From AED 1,181, select.
London.AED 1,185 per passenger.Departing Mon, Mar 1.One-way flight with Virgin Atlantic.Outbound direct flight with Virgin Atlantic departing from Washington Dulles on Mon, Mar 1, arriving in London Heathrow.Price includes taxes and charges.From AED 1,185, select.
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Washington, D.C. to Harmondsworth: Flight information

The things to know before you go.
Fly intoLondon Heathrow Airport
Distance to Harmondsworth2.5 km
Cheapest flightAED 977
Cheapest month to flyJuly
Most popular airlineAmerican Airlines
Average flight time7 hrs, 20 mins

Find the cheapest month to fly from Washington, D.C. to Harmondsworth

We always keep an eye on fares, so you can find the best flight deal in seconds. It looks like Washington, D.C. to Harmondsworth flights are currently cheapest in October. We’ve based this on flights into London Heathrow Airport.
Jul
from AED 977
Aug
from AED 1,001
Sep
from AED 1,020
Oct
from AED 986
Nov
from AED 1,049
Dec
from AED 1,066
Jan
from AED 985
Feb
from AED 1,018
Mar
from AED 1,049
Apr
from AED 1,068
May
from AED 1,015
Jun
from AED 1,559

Finding cheap flights from Washington, D.C. to Harmondsworth: Frequently asked questions

There are three (3) airports near Harmondsworth: London Heathrow Airport, London City Airport, and London Gatwick Airport.
The best price we found for a round-trip flight from Washington, D.C. to Harmondsworth is AED 1,928. 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.
American Airlines, British Airways, and Lufthansa all offer direct flights to London Heathrow Airport.
We've checked every Washington, D.C. to Harmondsworth fare we could find, and the cheapest upcoming date to fly seems to be on Sunday, October 11, 2026. Overall, the cheapest month to fly from Washington, D.C. to Harmondsworth is usually October.
If you're flying from Washington, D.C., the cheapest airport near Harmondsworth is London Heathrow – which is 2.5 km away from the center of Harmondsworth. We've found flights to this airport from AED 1,928.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington, D.C. to Harmondsworth on Sunday, October 11, 2026.
No airlines currently offer direct flights between Washington, D.C. and Harmondsworth. 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 Harmondsworth 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 Harmondsworth is around 40 days in advance, so don’t leave your flight to the last minute.

London Heathrow Airport is 2.5km from Harmondsworth, London City Airport is 36.4km from Harmondsworth, and London Gatwick Airport is 42.6km from Harmondsworth.
London Heathrow Airport is closest to Harmondsworth, at around 2.5 km away.
The cheapest airline that flies to Harmondsworth is Icelandair, and the cheapest airline that flies to London City Airport is British Airways.