Cheap flights from London to Washington Dulles Intl

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

All the information you need to plan the best LON to IAD flight in 2021: compare London to Washington Dulles Intl flight prices with the expected peak season, weather and rainfall in Washington Dulles Intl.
LON - IAD
Price
£410 - £591
IAD
Temperature
8 - 31 °C
IAD
Rainfall
64 - 113 mm

Popular in

August

High demand for flights, 18% potential price rise

Cheapest in

February

Best time to find cheap flights, 15% potential price drop

Round-trip from

£410

From London to Washington Dulles Intl

One-way from

£163

One-way flight from London to Washington Dulles Intl

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 London to Washington Dulles Intl?

Travellers have found it’s best to book a flight 34 days in advance to save up to 27% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 34 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Washington Dulles Intl 1-2 weeks in advance for as low as £518, or £605 for flights within the next 24 hours.

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

February can be a great time to fly to Washington Dulles Intl from London with a flight ticket averaging about £474. Cheapflights users have found deals in the month of February for as cheap as £317. The most expensive prices can be found in the month of July.

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

The best prices found for LON to IAD flights in May, June
22 Jun - 7 Jul
£257pp
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
22 Jun - 7 Jul
£265pp
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
30 Jun - 4 Jul
£282pp
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick

London to Washington Dulles Intl 2021 flight deals

Cheap flights to Washington Dulles Intl from London found for this year
22 Jun - 7 Jul
£257pp
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
1 Jul - 5 Jul
£265pp
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick
22 Jun - 7 Jul
£265pp
LGW
London Gatwick
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LGW
London Gatwick

Direct flights to Washington Dulles Intl from London

Save time with London to Washington Dulles Intl direct flight deals
24 May - 31 May
£496pp
LHR
London Heathrow
Finnair
Direct
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Finnair
Direct
LHR
London Heathrow
17 May - 20 Jun
£514pp
LHR
London Heathrow
Lufthansa
Direct
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Lufthansa
Direct
LHR
London Heathrow
17 May - 6 Jun
£518pp
LHR
London Heathrow
Lufthansa
Direct
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Lufthansa
Direct
LHR
London Heathrow

Last-minute flights from London to Washington Dulles Intl

Late deals on return flights to Washington Dulles Intl from London, departing today and this week
22 May - 5 Jun
£353pp
STN
London Stansted
Multiple airlines
   
2 STOPS
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
20 May - 7 Jun
£360pp
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
18 May - 23 May
£362pp
STN
London Stansted
Multiple airlines
   
2 STOPS
IAD
Washington Dulles Intl
IAD
Washington Dulles Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted

One-way flights to Washington Dulles Intl from London

The cheapest one-way flights from London to Washington Dulles Intl
12:25 - 16:15
TAP AIR PORTUGAL
1 stop
32h 50m
LGW - IAD
TAP AIR PORTUGAL
£164
Travel2Be
12:25 - 16:15
TAP AIR PORTUGAL
1 stop
32h 50m
LGW - IAD
TAP AIR PORTUGAL
£167
mytrip.com
12:25 - 16:15
TAP AIR PORTUGAL
1 stop
32h 50m
LGW - IAD
TAP AIR PORTUGAL
£170
mytrip.com

Related info for your journey

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

Flight FAQs

From London to Washington Dulles Intl

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

New policies can now be found on Alitalia to help keep travellers safe while flying. New policies for travellers booking flights from London to Washington Dulles Intl include masks being provided and required on board, daily cleaning and sanitisation, 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 London to Washington Dulles Intl have flexible cancellations due to COVID-19?

Virgin Atlantic, United Airlines, and Aer Lingus 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 London to Washington Dulles Intl for under £283 on Cheapflights?

Yes, there are multiple flights from London to Washington Dulles Intl for under £283. The cheapest flight booked recently is on TAP AIR PORTUGAL for just £257, but on average you can expect to pay £285.

Are there direct flights from London to Washington Dulles Intl for under £566 on Cheapflights?

Cheapflights has 20 direct flights from London to Washington Dulles Intl under £566. A good price for a direct flight from London to Washington Dulles Intl is less than £540.

Are there last-minute flights available from London to Washington Dulles Intl for under £354?

There are currently 20+ open flights from London to Washington Dulles Intl within the next 7 days for less than £354.

Is London weather warmer or cooler than Washington Dulles Intl?

We forecast the temperature to be around the 31 °Cs in July, on average. The temperature in Washington Dulles Intl is generally hotter than in London. Book flights in a timely manner in correlation to your departure date.

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

Icelandair can get you from London to Washington Dulles Intl in just under 11h. Your travel time can differ by up to .

What are the cheapest airlines to flying from London to Washington Dulles Intl return?

According to our current data, TAP AIR PORTUGAL (£258), and Icelandair (£283) offers the cheapest pricing from London to Washington Dulles Intl. TAP AIR PORTUGAL is 46% cheaper than the average price of flights available within the next 90 days to this destination.

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

To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £164.

Alternative routes for London to Washington Dulles Intl

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

Destination information for Washington Dulles Intl

Things to know before you go - useful duration and weather info for your trip from London to Washington Dulles Intl.
Today's exchange rate
£1 = $1.42
Average temperature for May in Washington Dulles Intl
25.0 °C
Avg rainfall for May in Washington Dulles Intl
111.0 mm

Airports servicing London

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

Airports servicing Washington

Top 10 airlines flying from London to Washington Dulles Intl

The chart below displays the airlines Cheapflights users travelling from London to Washington Dulles Intl 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
TAP AIR PORTUGAL
£420 £585 No cancel fee N/A
Search TAP AIR PORTUGAL flights
Air Canada
£394 £653 No cancel fee 67%
Search Air Canada flights
SAS
£414 £725 No cancel fee 77%
Search SAS flights
Royal Air Maroc
£688 £751 No cancel fee 75%

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

Search Royal Air Maroc flights
American Airlines
£477 £758 No cancel fee 71%
Search American Airlines flights
SWISS
£645 £775 No cancel fee 79%
Search SWISS flights
Brussels Airlines
£479 £779 No cancel fee N/A
Search Brussels Airlines flights
Finnair
£500 £815 No cancel fee 76%
Search Finnair flights
Delta
£458 £870 No cancel fee N/A
Search Delta flights
Air France
£469 £878 No cancel fee 77%
Search Air France flights

Hourly flight availability from London to Washington Dulles Intl

See what time of day planes typically take off from London towards Washington Dulles Intl.
Morning 6 AM to midday 54% of flight departures
Afternoon Midday to 6 PM 45% of flight departures
Early morning Midnight to 6 AM 1% of flight departures
Evening 6 PM to midnight 0% of flight departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from London to Washington Dulles Intl
See how many times per day planes take to the skies headed from London to Washington Dulles Intl.
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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