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Cheap flights from Washington to London (IAD to LHR)

Looking for a cheap last-minute deal or the best round-trip flight from Washington to London? Find the biggest savings on one-way and round-trip tickets right here.

Good to know

Useful information for finding cheap flights from Washington Dulles International to London Heathrow and booking your next trip

Cheapest Round Trip Flight

$418

UA United Airlines • 1 stop • 30h 15m

Jul 11 – Aug 08

The cheapest round trip flight from Washington Dulles International to London Heathrow is currently $418

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Cheapest Direct Flight

$599

AA American Airlines • nonstop •

Jul 11

The cheapest nonstop flight from Washington Dulles International to London Heathrow is currently $599

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Fastest Flight

12h

The fastest nonstop flight from Washington Dulles International to London Heathrow takes 12h

Recent airfare deals on Washington to London

Jul 11 - Aug 08, Economy
UA
Washington → London
30h 15m
5:25 PM - 4:40 PM • 1 stop
UA
Washington → London
23h 47m
1:00 PM - 10:27 PM • 1 stop
$418
United Airlines
Jul 11 - Aug 08, Economy
UA
Washington → London
19h
5:35 PM - 10:15 AM • 1 stop
UA
Washington → London
20h 7m
3:20 PM - 10:27 PM • 1 stop
$445
United Airlines
Jul 11 - Aug 08, Economy
UA
Washington → London
19h
5:35 PM - 10:15 AM • 1 stop
UA
Washington → London
13h 40m
12:15 PM - 3:35 PM • nonstop
$511
United Airlines
Jul 11 - Aug 08, Economy
SN
Washington → London
37h
5:35 PM - 8:55 PM • 1 stop
UA
Washington → London
18h 47m
4:00 PM - 10:27 PM • 1 stop
$527
Brussels Airlines
Jul 11 - Aug 08, Economy
AA
Washington → London
12h 5m
5:50 PM - 6:15 AM • nonstop
AA
Washington → London
13h 25m
2:25 PM - 5:30 PM • nonstop
$571
American Airlines
Jul 11 - Aug 08, Economy
AY
Washington → London
12h 5m
5:50 PM - 6:15 AM • nonstop
AY
Washington → London
13h 30m
5:00 PM - 8:10 PM • nonstop
$1068
Finnair

Facts to know while booking flights from Washington to London

What are the airports in Washington?
IAD,BWI,DCA
What’s the most popular airline flying from IAD to LHR?
The most popular airline flying from Washington to London are
Can I fly from IAD to LHR non-stop?
Yes, you can fly IAD to LHR non-stop on
Which airlines fly nonstop between Washington and London?
The non-stop flights between Washington and London are .
What’s the earliest departure time from IAD to LHR Airport?
The earliest flight leaves IAD at 5:25 pm and lands in LHR - London Heathrow
What are the airports in London?
LHR
Can I make changes to my Washington to London flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from IAD to LHR?
Read the fare rules of the Washington to London air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Washington and London?
operate flights between Washington and London
How long does a flight from Washington to London take?
It takes approximately 8 hour to fly non-stop from IAD to LHR, which is 3676.74 miles by air.
Which airlines provide the cheapest flights from Washington (IAD) to London (LHR) ?
In the past couple of days, the cheapest tickets to LHR from IAD were found on ('AY') : USD 1068
Do I need a passport to fly between IAD and LHR?
Yes
What’s the latest departure time from IAD to LHR ?
The last flight leaves IAD at 10:40 pm

Flights from Washington to London

Origin Airport Washington Dulles International , Washington, US
Destination Airport London Heathrow , London, GB
Distance miles

Popular Airlines

Delta Airline, DL
Virgin Atlantic (VS)
United Airlines, UA
American Airlines, AA

Popular Origin & Destination

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