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

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

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

All the information you need to plan the best IAD to LON flight in 2021: compare Washington Dulles Intl to London flight prices with the expected peak season, weather and rainfall in London.
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

$252

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.
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.

Cheap flights from Washington Dulles Intl to London in May, June 2021

The best prices found for IAD to LON flights for May, June
16 May - 22 May
$419pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
23 Jun - 30 Jun
$426pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
22 Jun - 20 Jul
$432pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl

Washington Dulles Intl to London 2021 flight deals

Cheap flights to London from Washington Dulles Intl found for this year
9 Sep - 21 Sep
$386pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
LGW
London Gatwick
LGW
London Gatwick
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
23 Nov - 28 Nov
$392pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
LTN
London Luton
LTN
London Luton
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
23 Nov - 28 Nov
$399pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl

Non-stop flights to London from Washington Dulles Intl

Save time with Washington Dulles Intl to London direct flight deals
14 Sep - 12 Oct
$573pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl
29 Jun - 7 Jul
$607pp
IAD
Washington Dulles Intl
Virgin Atlantic
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
IAD
Washington Dulles Intl
14 Jun - 21 Jun
$625pp
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

Late deals on round-trip flights to London from Washington Dulles Intl, departing today and this week
23 May - 30 May
$511pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
23 May - 13 Jun
$521pp
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
IAD
Washington Dulles Intl
23 May - 4 Jun
$524pp
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl

One-way flights to London from Washington Dulles Intl

The cheapest one-way flights from Washington Dulles Intl to London
6:30 am - 2:35 am
Air Canada
2 Stops
15h 05m
IAD - LHR
Air Canada
$252
Travel2Be
6:45 am - 9:10 am
Multiple Airlines
2 Stops
21h 25m
IAD - STN
Multiple Airlines
$276
FlightNetwork
1:30 pm - 11:35 am
TAP AIR PORTUGAL
1 Stop
17h 05m
IAD - LGW
TAP AIR PORTUGAL
$278
SmartFares

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Washington Dulles Intl</span> to <span class="emphasized">London</span> flights.

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.

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 $400 on Cheapflights?

Yes, there are multiple flights from Washington Dulles Intl to London for under $400. The cheapest flight booked recently is on Multiple Airlines for just $386, but on average you can expect to pay $437.

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

Cheapflights has at least 20 direct flights from Washington Dulles Intl to London under $600. A good price for a nonstop flight from Washington Dulles Intl to London is less than $642.

Are there last-minute flights available from Washington Dulles Intl to London for under $600?

There are currently 20+ open flights from Washington Dulles Intl to London within the next 7 days for less than $600.

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 20m. Icelandair provides one of the quickest options available for as low as $549. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What is the cheapest airline to fly from Washington Dulles Intl to London round-trip?

Cheapflights users have booked flights from Washington Dulles Intl to London round-trip from $447. You may be able to fly from Washington Dulles Intl to London for 36% less than the average price by searching for this airline.

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 $247. However, be on the lookout for offers from Air Canada 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

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for London

Things to know before you go - useful duration and weather info for your trip from Washington Dulles Intl to London.
Today's exchange rate
$1 = £0.72
Average temperature for May in London
64.4 °F
Avg rainfall for May in London
2.0 ″

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

The chart below displays the airlines Cheapflights users traveling from Washington Dulles Intl to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
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

See what time of day planes typically take off from Washington Dulles Intl towards London.
Afternoon Noon to 6 PM 54% of IAD to LON departures
Evening 6 PM to midnight 45% 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
See how many times per day planes take to the skies headed from Washington Dulles Intl to London.
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
Home Europe United Kingdom England London Cheap flights from Washington Dulles Intl to London