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Cheap flights from Washington Dulles Intl (IAD) to London (LON)

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The best prices from Washington Dulles Intl to London are usually found in October or March, booked 43 days in advance, depart on a Tuesday or Monday and return on a Wednesday

How to find the cheapest flight from
Washington Dulles Intl (IAD) to London (LON)

IAD - LON
Price
$634 - $863
LON
Temperature
48.2 - 73.4 °F
LON
Rainfall
1.4 - 2.8 inches

Popular in

June

High demand for flights, 18% potential price rise

Cheapest in

October

Best time to find cheap flights, 10% potential price drop

Round-trip from

$634

From Washington Dulles Intl to London

One-way from

$271

One-way flight from Washington Dulles Intl to London

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 London?

Monday is generally a great day to depart. Flying on this day could help you save up to 10%.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 44% on flights from Washington Dulles Intl to London compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $910. For sooner than that we have options available in the next 3 days from $1,146.

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

Our data shows that October tends to be the cheapest month to fly to London from Washington Dulles Intl. Users have commonly found prices around $714 for the month, but tickets can be as low as $445. Due to multiple factors, prepare for potentially higher prices in July.

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

Unlike at noon, when flights are generally more expensive, you can save up to 5% on flights from Washington Dulles Intl to London by exploring options for tickets in the evening.

Cheap flights from Washington Dulles Intl to London in February, March 2021

29 Mar - 3 Apr
$484pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
31 Mar - 7 Apr
$503pp
IAD
Washington Dulles Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
IAD
Washington Dulles Intl
31 Mar - 22 Apr
$506pp
IAD
Washington Dulles Intl
Icelandair
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Icelandair
 
1 STOP
IAD
Washington Dulles Intl

Washington Dulles Intl to London 2021 flight deals

7 Apr - 21 Apr
$478pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
4 Apr - 9 Apr
$479pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
12 Apr - 21 Apr
$480pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl

Non-stop flights to London from Washington Dulles Intl

24 Mar - 22 Apr
$606pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl
23 Mar - 20 Apr
$609pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl
11 May - 29 Jun
$633pp
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 London

3 Mar - 24 Mar
$618pp
IAD
Washington Dulles Intl
Turkish Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Turkish Airlines
 
1 STOP
IAD
Washington Dulles Intl
4 Mar - 8 Mar
$619pp
IAD
Washington Dulles Intl
Turkish Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Turkish Airlines
 
1 STOP
IAD
Washington Dulles Intl
4 Mar - 9 Mar
$693pp
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 London from Washington Dulles Intl

12:52 pm - 4:30 am
Virgin Atlantic
1 Stop
11h 38m
IAD - LHR
Virgin Atlantic
$271
Travel2Be
6:00 pm - 6:05 pm
Multiple Airlines
1 Stop
19h 05m
IAD - STN
Multiple Airlines
$276
Gotogate
5:45 pm - 11:35 am
TAP AIR PORTUGAL
1 Stop
12h 50m
IAD - LGW
TAP AIR PORTUGAL
$278
DreamWorldTravel

Related info for your journey

Flight FAQs

From Washington Dulles Intl to London

Are flight prices decreasing from Washington Dulles Intl to London 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 London 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 to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Delta is one of them. Some of the new policies that have been implemented to accommodate travelers flying from Washington Dulles Intl to London are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like United Airlines, British Airways, and Lufthansa flying from Washington Dulles Intl to London have implemented new flexible cancellation policies.

Can I find flights from Washington Dulles Intl to London for under $500 on Cheapflights?

Yes, there are multiple flights from Washington Dulles Intl to London for under $500. The cheapest flight booked recently is on TAP AIR PORTUGAL for just $478, but on average you can expect to pay $498.

Are there nonstop flights from Washington Dulles Intl to London for under $700 on Cheapflights?

Cheapflights has at least 20 direct flights from Washington Dulles Intl to London under $700. A good price for a nonstop flight from Washington Dulles Intl to London is less than $648.

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

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

Is Washington Dulles Intl weather warmer or cooler than London?

We forecast the temperature to be around the 88 °F's in July, on average. The temperature in London is generally colder than in Washington Dulles Intl. Book flights in a timely manner in correlation to your departure date.

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

A quick flight from Washington Dulles Intl to London can take about 10h. Virgin Atlantic provides one of the quickest options available for as low as $642. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Cheapflights users have booked flights from Washington Dulles Intl to London round-trip from $478. Another airline that can offer you cheap pricing is Icelandair. You may be able to fly from Washington Dulles Intl to London for 32% less than the average price by searching for these airlines.

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

The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $250. However, be on the lookout for offers from Virgin Atlantic and Finnair, as they are both options that can get you from Washington Dulles Intl to London for a low price.

Alternative routes for Washington Dulles Intl to London

Destination information for London

Today's exchange rate
$1 = £0.71
Average temperature for February in London
50.0 °F
Avg rainfall for February in London
1.5 ″

Airports servicing Washington

Airports servicing London

Gatwick (LGW)
City (LCY)
Stansted (STN)
Luton (LTN)
Southend (SEN)

Top 10 airlines flying from Washington Dulles Intl to London

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%
American Airlines
$500 $747 No cancel fee 71%
TAP AIR PORTUGAL
$504 $765 No cancel fee N/A
Delta
$415 $780 No cancel fee N/A

Hourly flight availability from Washington Dulles Intl to London

Afternoon Noon to 6 PM 53% of IAD to LON departures
Evening 6 PM to midnight 46% of IAD to LON departures
Early morning Midnight to 6 AM 1% of IAD to LON departures
Morning 6 AM to noon 0% of IAD to LON departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Washington Dulles Intl to London
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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