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Cheap flights from Washington Dulles Intl (IAD) to Heathrow (LHR)

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The best prices from Washington Dulles Intl to Heathrow are usually found in February or January, booked 60 days in advance, depart on a Monday or Tuesday and return on a Wednesday

How to find the cheapest flight from
Washington Dulles Intl (IAD) to Heathrow (LHR)

IAD - LHR
Price
$574 - $1032
LHR
Temperature
46.4 - 75.2 °F
LHR
Rainfall
1.5 - 2.6 inches
Popular in June High demand for flights, 32% potential price rise
Cheapest in February Best time to find cheap flights, 18% potential price drop
Round-trip from $574 From Washington Dulles Intl to Heathrow
One-way from $257 One-way flight from Washington Dulles Intl to Heathrow
Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Washington Dulles Intl to Heathrow?

Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 10% on the overall cost on flights from Washington Dulles Intl to Heathrow.

How far in advance should I book a flight from Washington Dulles Intl to Heathrow?

To save on the cost of your flight from Washington Dulles Intl to Heathrow, book at least 51 days before your planned departure. Booking around this time can save you about 38% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $813 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $886.

What is the cheapest month to fly from Washington Dulles Intl to Heathrow?

February can be a great time to fly to Heathrow from Washington Dulles Intl with a flight ticket averaging about $634. Cheapflights users have found deals in the month of February for as cheap as $394. The most expensive prices can be found in the month of June.

When is the cheapest time to fly from Washington Dulles Intl to Heathrow (IAD - LHR)?

It’s optimal to fly from Washington Dulles Intl to Heathrow in the evening. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the noon.

Cheap flights from Washington Dulles Intl to Heathrow in August, September 2020

The best prices found for IAD to LHR flights for August, September
31 Aug - 28 Oct
$418pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
31 Aug - 2 Nov
$420pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
31 Aug - 29 Oct
$425pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl

Washington Dulles Intl to Heathrow 2020 flight deals

Cheap flights to Heathrow from Washington Dulles Intl found for this year
20 Sep - 27 Sep
$399pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
31 Oct - 30 Nov
$404pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
20 Sep - 25 Sep
$405pp
IAD
Washington Dulles Intl
Multiple Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl

Non-stop flights to Heathrow from Washington Dulles Intl

Save time with Washington Dulles Intl to Heathrow direct flight deals
1 Dec - 8 Dec
$590pp
IAD
Washington Dulles Intl
Lufthansa
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Lufthansa
Non-Stop
IAD
Washington Dulles Intl
4 Nov - 16 Nov
$595pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Iberia
Non-Stop
IAD
Washington Dulles Intl
26 Oct - 3 Nov
$596pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Finnair
Non-Stop
IAD
Washington Dulles Intl

Last minute flights from Washington Dulles Intl to Heathrow

Late deals on round-trip flights to Heathrow from Washington Dulles Intl, departing today and this week
27 Jul - 27 Aug
$640pp
IAD
Washington Dulles Intl
Multiple Airlines
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
 
1 STOP
IAD
Washington Dulles Intl
28 Jul - 2 Sep
$657pp
IAD
Washington Dulles Intl
Austrian Airlines
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Austrian Airlines
 
1 STOP
IAD
Washington Dulles Intl
26 Jul - 23 Aug
$663pp
IAD
Washington Dulles Intl
Austrian Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Austrian Airlines
 
1 STOP
IAD
Washington Dulles Intl

One-way flights to Heathrow from Washington Dulles Intl

The cheapest one-way flights from Washington Dulles Intl to Heathrow
4:35 pm - 7:45 am
Icelandair
1 Stop
10h 10m
IAD - LHR
Icelandair
$257
StudentUniverse
4:05 pm - 6:55 pm
TAP AIR PORTUGAL
1 Stop
21h 50m
IAD - LHR
TAP AIR PORTUGAL
$271
mytrip.com
7:55 pm - 5:10 pm
Multiple Airlines
2 Stops
16h 15m
IAD - LHR
Multiple Airlines
$272
Kiwi.com

Related info for your journey

Useful info, stats and facts about Washington Dulles Intl to Heathrow flights.

Flight FAQs

From Washington Dulles Intl to Heathrow

Are flight prices decreasing from Washington Dulles Intl to Heathrow due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Washington Dulles Intl and Heathrow for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Washington Dulles Intl to Heathrow for under $400 on Cheapflights?

Yes, there are multiple flights from Washington Dulles Intl to Heathrow for under $400. The cheapest flight booked recently is on Multiple Airlines for just $399, but on average you can expect to pay $420.

Are there nonstop flights from Washington Dulles Intl to Heathrow for under $600 on Cheapflights?

Cheapflights has at least 20 direct flights from Washington Dulles Intl to Heathrow under $600. A good price for a nonstop flight from Washington Dulles Intl to Heathrow is less than $605.

Are there last-minute flights available from Washington Dulles Intl to Heathrow for under $700?

There are currently 20+ open flights from Washington Dulles Intl to Heathrow within the next 7 days for less than $700.

Does it rain more in Washington Dulles Intl or Heathrow?

When traveling, we recommend packing in preparation to handle common weather conditions. The rainfall in Washington Dulles Intl is typically greater than that of Heathrow. We can gather that this will continue over the next 14 days.

Is Washington Dulles Intl weather warmer or cooler than Heathrow?

Temperatures around the 88 °F's can be experienced in July. The weather in Heathrow is colder than in Washington Dulles Intl. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from Washington Dulles Intl to Heathrow?

There are many flights that can get you from Washington Dulles Intl to Heathrow in 10h 10m. Fly via Icelandair or TAP AIR PORTUGAL to get the fastest option. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from Washington Dulles Intl to Heathrow round-trip?

According to our current data, TAP AIR PORTUGAL ($415), and Icelandair ($429) offers the cheapest pricing from Washington Dulles Intl to Heathrow. These flights start at 40% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Washington Dulles Intl to Heathrow one-way?

The cheapest airlines for a one-way flight from Washington Dulles Intl to Heathrow are TAP AIR PORTUGAL ($163) and Icelandair ($257).

Alternative routes for Washington Dulles Intl to Heathrow

Destination information for Heathrow

Things to know before you go. Useful info for your trip from Washington Dulles Intl to Heathrow
Today's exchange rate
$1 = £0.77
Average temperature for August in Heathrow
75.2 °F
Avg rainfall for August in Heathrow
2.6 ″

Airports servicing Washington

Airports servicing London

Hourly flight availability from Washington Dulles Intl to Heathrow

Afternoon Noon to 6 PM 54% of IAD to LHR departures
Evening 6 PM to midnight 45% of IAD to LHR departures
Early morning Midnight to 6 AM 1% of IAD to LHR departures
Morning 6 AM to noon 0% of IAD to LHR departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Washington Dulles Intl to Heathrow
Sunday
11 daily flights
Monday
11 daily flights
Tuesday
11 daily flights
Wednesday
11 daily flights
Thursday
11 daily flights
Friday
11 daily flights
Saturday
11 daily flights
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