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 October or November, booked 42 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
$616 - $874
LHR
Temperature
46.4 - 75.2 °F
LHR
Rainfall
1.5 - 2.6 inches

Popular in

June

High demand for flights, 19% potential price rise

Cheapest in

October

Best time to find cheap flights, 13% potential price drop

Round-trip from

$616

From Washington Dulles Intl to Heathrow

One-way from

$260

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 61 days before your planned departure. Booking around this time can save you about 44% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $910 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,146.

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

October can be a great time to fly to Heathrow from Washington Dulles Intl with a flight ticket averaging about $714. Cheapflights users have found deals in the month of October for as cheap as $445. The most expensive prices can be found in the month of July.

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 at noon.

Cheap flights from Washington Dulles Intl to Heathrow in March, April 2021

31 Mar - 4 Apr
$370pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
18 Apr - 24 Apr
$376pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
2 Apr - 28 Apr
$429pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl

Washington Dulles Intl to Heathrow 2021 flight deals

31 Mar - 4 Apr
$370pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
18 Apr - 24 Apr
$376pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
16 Sep - 26 Sep
$415pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl

Non-stop flights to Heathrow from Washington Dulles Intl

1 Apr - 12 May
$596pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl
1 Apr - 28 Apr
$597pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl
12 Aug - 19 Aug
$608pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl

Last minute flights from Washington Dulles Intl to Heathrow

10 Mar - 17 Mar
$627pp
IAD
Washington Dulles Intl
Turkish Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Turkish Airlines
 
1 STOP
IAD
Washington Dulles Intl
12 Mar - 20 Mar
$651pp
IAD
Washington Dulles Intl
Turkish Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Turkish Airlines
 
1 STOP
IAD
Washington Dulles Intl
9 Mar - 16 Mar
$670pp
IAD
Washington Dulles Intl
Turkish Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Turkish Airlines
 
1 STOP
IAD
Washington Dulles Intl

One-way flights to Heathrow from Washington Dulles Intl

1:30 pm - 1:45 pm
TAP AIR PORTUGAL
1 Stop
19h 15m
IAD - LHR
TAP AIR PORTUGAL
$260
Gotogate
3:25 pm - 6:40 am
Virgin Atlantic
1 Stop
11h 15m
IAD - LHR
Virgin Atlantic
$264
Travel2Be
6:30 pm - 6:45 am
Finnair
Nonstop
7h 15m
IAD - LHR
Finnair

Related info for your journey

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.

What safety measures are being taken by airlines flying from Washington Dulles Intl to London Heathrow to control the spread of COVID-19?

Delta is one of the many airlines that have implemented additional safety measures to control the spread of COVID-19. New policies for travelers booking flights from Washington Dulles Intl to London Heathrow include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from Washington Dulles Intl to London Heathrow have flexible cancellations due to COVID-19?

United Airlines, British Airways, and Lufthansa are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

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 TAP AIR PORTUGAL for just $370, but on average you can expect to pay $477.

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 $647.

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.

What days are nonstop flights available from Washington Dulles Intl to Heathrow?

Nonstop flights are available for this route on the following days: Saturday.

How many flights depart from Washington Dulles Intl to Heathrow on average per day?

Travelers can expect 5 flights from Washington Dulles Intl to London Heathrow on average per day.
Evening (6pm - Midnight) - 100% of flight departures

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 16 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. Airlines will cover a distance of 3687 mi. 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 ($370), Lufthansa ($495), and Icelandair ($515) offers the cheapest pricing from Washington Dulles Intl to Heathrow. These flights start at 47% 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 ($191), Virgin Atlantic ($264), and Finnair ($277).

Alternative routes for Washington Dulles Intl to Heathrow

Destination information for Heathrow

Today's exchange rate
$1 = £0.72
Average temperature for March in Heathrow
53.6 °F
Avg rainfall for March in Heathrow
1.5 ″

Airports servicing Washington

Airports servicing London

Top 10 airlines flying from Washington Dulles Intl to Heathrow

Airline Cheapest Average Flexibility On-time COVID-19 safety
SWISS
$473 $615 No cancel fee 79%
WOW air
$410 $625 No cancel fee N/A

We couldn't confirm the COVID-19 safety measures taken by WOW air. Please check directly on their website for additional information.

KLM
$481 $632 No cancel fee 75%
SAS
$355 $652 No cancel fee 77%
Air France
$492 $705 No cancel fee 77%
Finnair
$503 $723 No cancel fee 76%
Iberia
$520 $734 No cancel fee 77%
TAP AIR PORTUGAL
$504 $765 No cancel fee N/A
Delta
$415 $780 No cancel fee N/A
American Airlines
$500 $806 No cancel fee 71%

Hourly flight availability from Washington Dulles Intl to Heathrow

Afternoon Noon to 6 PM 53% of IAD to LHR departures
Evening 6 PM to midnight 46% 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
6 daily flights
Monday
11 daily flights
Tuesday
5 daily flights
Wednesday
11 daily flights
Thursday
5 daily flights
Friday
11 daily flights
Saturday
11 daily flights
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