Find Cheap Flights from London Heathrow to Washington Dulles Intl (LHR - IAD)

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London Heathrow to Washington Dulles Intl Flight Information

Avg. Flight Duration 7h 55m
Flights Arrive in Washington Dulles Intl
Flights Depart from London Heathrow
Flight Price $352
Distance 3,667 miles
Airlines Austrian Airlines, Brussels Airlines, Icelandair, Virgin Atlantic, Aer Lingus, Delta, Lufthansa

Good to Know

Low Season:
November
Best time to beat the crowds
3%
expected price decrease
High Season:
July
Most popular time to fly
19%
expected price increase
Average Price:
$452
(avg. price over the last 2 weeks)
Good Deal:
$389
or less (round trip)

When to Book Flights from London Heathrow to Washington Dulles Intl

Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $388 or less.
The cheapest flight from London Heathrow to Washington Dulles Intl was found 34 days before departure, on average.
Book at least 1 week before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is November.
Morning departure is around 3% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking London Heathrow to Washington Dulles Intl Flights

How long does a flight from London Heathrow to Washington Dulles Intl take?
An average nonstop flight takes 8h 25m, covering a distance of 3667 miles.
How many flights are there between London Heathrow and Washington Dulles Intl?
There are 342 (nonstop) flights between London Heathrow and Washington Dulles Intl per week, averaging 48 per day.
Which airlines provide the cheapest flights from London Heathrow to Washington Dulles Intl?
In the past 3 days, the cheapest round-trip tickets were found on Austrian Airlines ($352), Brussels Airlines ($383) and Icelandair ($517).
Do I need a passport to fly between London Heathrow and Washington Dulles Intl?
Yes.
Which airlines fly most frequently between London Heathrow and Washington Dulles Intl?
Air Canada (5 times daily), Austrian Airlines (5 times daily), United Airlines (5 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly London Heathrow to Washington Dulles Intl?
For London Heathrow to Washington Dulles Intl, Friday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Washington Dulles Intl back to London Heathrow, the best deals are generally found on Friday, with Saturday being the most expensive.

Book cheap flights from London Heathrow to Washington Dulles Intl (round-trip)

Airports
Origin
London
$352
only
$352
Destination
Washington
$352
only
$352
Fri, Mar 8
LHR
London Heathrow
IAD
Washington Dulles Intl
60h 13m
Sun, Mar 10
IAD
Washington Dulles Intl
LHR
London Heathrow
7h 10m
Trip: 3 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 14 reviews
Overall
8.1
Boarding
8.2
Comfort
7.9
Crew
8.5
Entertainment
7.4
Food
7.5
LHR
IAD
Good 6.3

Cons: We were stuck on the ground at London for what seems like ages.

LHR
IAD
Okay 5.3

Pros: Not at all a comfortable experience, but I suppose it served its purpose.

Cons: Seats in economy class are way too crowded, plane was too warm and air was stale (and had an odd odor). Choices of dinner selections ran out quickly, and serving any type of curry (the only option left) on an 8 hour flight is a very questionable choice.... Staff gave some people the full can of drinks, while others only a half glass. Also, even though there was not much turbulence throughout the flight, the plane was still VERY shaky for the majority of the time in the air. Not very comforting for those who are not frequent flyers. In the future, I plan to stick with British Airlines.

LHR
IAD
Excellent 10.0

Pros: The crew worked so hard and were always ready to do more for any problem that arose, be it, mothers with babies, the elderly and infirm, the less than gracious occasional passenger, or younger children. The entertaining things on the individual screens also helped make the long periods of sitting more manageable for young and old.

Cons: I didn't like how the passengers in general, left the cabin of the plane in such a mess! The crew came through several times for refuse, so I couldn't understand. Leaving pillows and blankets should be the only thing to clear out. Maybe a note on the TV screen could say, "a tidy plane helps flights be on time :-)"

VIE
FRA
Excellent 8.3

Pros: I like the food and servise

ORD
VIE
Excellent 9.6

Pros: Everything went very well! Boarding was easy, the flight was smooth with little turbulence, we arrived on time, the crew was friendly and attentive, the food was good!

Cons: Everything was very smooth, except that the seats were not very comfortable!

Fri, May 17
LHR
London Heathrow
IAD
Washington Dulles Intl
30h 50m
Sat, May 18
IAD
Washington Dulles Intl
LHR
London Heathrow
39h 30m
Trip: 2 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 1,976 reviews
Overall
7.1
Boarding
7.1
Comfort
7.0
Crew
7.6
Entertainment
6.4
Food
6.4
BUD
BRU
Okay 4.3

Cons: Flight delays is a constant problem with this company

EBB
BRU
Excellent 8.0

Pros: Helpful crew. They reset the screen, came around with blankets, headphones and generally tried to make the space habitable.

Cons: When I am asked to book my seat, I am usually shown a map which has no reflection on the overall reality. The seat I select is normally allocated to me but if the plane is not full (unusual) I am told there are unavailable seats that would provide more choice.

VCE
BRU
Excellent 8.3

Pros: The crew was very cool

Cons: The food was ok

BRU
LHR
Good 6.0

Pros: This particular flight was parked at the closest bay to immigration at Heathrow. So a late boarding and arrival was made early through not having a mile long walk to passport control.

Cons: Disorganized boarding with the plane load of people huddled around the entrance to the boarding area. No guidance from the crew on how to efficiently pack the overhead bins efficiently with passengers helpless to put their treasures into the overhead bins.

BRU
MRS
Excellent 10.0

Pros: Food and a good cabin crew on Brussels Air.

Cons: No complaints

Mon, Jan 28
LHR
London Heathrow
IAD
Washington Dulles Intl
11h 15m
Sat, Feb 9
IAD
Washington Dulles Intl
LHR
London Heathrow
10h 05m
Trip: 13 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 8,067 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
KEF
IAD
Mediocre 2.0

Pros: N/A

Cons: Our flight was delayed 3 hours and we were instructed to rebook. After waiting over an hour to talk to an agent, we were supposedly rebooked to an Air France flight. After rushing to another terminal, the Air France check in agent told us she could not find our tickets, although the Icelandair agent gave us written confirmation. After being sent to the Air France ticketing agent (another office), we were told we were on a British Airways flight. COMPLETELY DIFFERENT AIRLINE. How were we supposed to know this? This was extremely frustrating. But BA treated us great and we can now see why they have such a great reputation.

BOS
KEF
Mediocre 2.0

Pros: No baggage but flight advertised as Evonomy standard, that includes 1 checked bag.

Cons: See above.

BWI
KEF
Excellent 10.0

Pros: The movies!

DUB
KEF
Excellent 10.0

Pros: I enjoyed my flight with Iceland air. What I especially liked was how polite and helpful at the staff members were. The plane was also very nice and clean.

KEF
AMS
Excellent 10.0

Pros: Still the movies. And the wide body jet

Tue, Jan 22
LHR
London Heathrow
IAD
Washington Dulles Intl
8h 45m
Mon, Jan 28
IAD
Washington Dulles Intl
LHR
London Heathrow
7h 15m
Trip: 7 days
9.2ExcellentShow reviews
Overall 9.2 Excellent
Based on 25 reviews
Overall
8.1
Boarding
8.2
Comfort
7.8
Crew
8.5
Entertainment
8.0
Food
7.7
LHR
IAD
Excellent 10.0

Pros: We liked everything about our Virgin Atlantic flight. They could not have been more helpful from the time we got our Boarding passes in London until we got off the plane in Washington DC.

Cons: There was nothing to dislike on this part of our trip with Virgin Atlantic.

LAX
SYD
Excellent 10.0

Pros: Comfort, service food and entertainment. What more can you ask for.

Cons: Nothing. ]

LHR
IAD
Excellent 10.0

Pros: Movies. Meals. Wine. Freq

LHR
IAD
Good 6.0

Cons: The cabin was extremely dirty, the food was awful.

LHR
IAD
Excellent 10.0

Pros: The food and service was excellent. Love it!

Wed, Apr 3
LHR
London Heathrow
IAD
Washington Dulles Intl
11h 40m
Sun, Apr 7
IAD
Washington Dulles Intl
LHR
London Heathrow
9h 50m
Trip: 5 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 5,388 reviews
Overall
7.5
Boarding
7.6
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.8
LHR
DUB
Mediocre 2.0

Cons: Lost my luggage

DUB
LAX
Excellent 9.3

Pros: Crew and food is good...especially out of Dublin..

Cons: maybe get thicker seat cushion

DUB
JFK
Excellent 8.6

Pros: Very happy with my choice of this AE LIGUS Comfortabke seats and great crew Love it

DUB
EWR
Excellent 10.0

Pros: Staff was wonderful, food was great! Takeoff was a little delayed but they kept us informed and that was fine. Over all a wonderful experience

Cons: Nothing

DUB
IAD
Okay 4.6

Cons: Neither wi-if nor the movie system worked. Fortunately we had strong tail winds so an 8 hour flight was 6. They should have let us know while we were still in the terminal so we could purchase a book or download a movie. Beer and wine had to be purchased on an international flight. No economy plus.

Wed, May 8
LHR
London Heathrow
IAD
Washington Dulles Intl
8h 25m
Wed, May 22
IAD
Washington Dulles Intl
LHR
London Heathrow
10h 00m
Trip: 15 days
7.9GoodShow reviews
Overall 7.9 Good
Based on 21,950 reviews
Overall
8.1
Boarding
8.1
Comfort
7.8
Crew
8.5
Entertainment
7.7
Food
7.4
BDL
ATL
Excellent 9.3

Pros: New plane with great entertainment arrived 30 mins early

ATL
CLE
Excellent 10.0

Pros: I’m always pleased with our delta flights to and from Atlanta. Our flight was on time, the comfort plus seats are comfy enough, and the flights are quick and easy.

Cons: Everything was great on our flight.

RDU
JFK
Mediocre 2.0

Pros: Nothing

Cons: I missed my flight due to Tsa

FCO
ATL
Good 7.0

Pros: THe crew was super

Cons: Confort no good very tight seats Movies hard to understand Announcements hard to hear

DTW
LAX
Excellent 10.0

Pros: Everything went smoothly. Baggage was at carousel before we were, a first.

Cons: Everything was fine.

Sun, Dec 16
LHR
London Heathrow
IAD
Washington Dulles Intl
8h 45m
Sun, Dec 30
IAD
Washington Dulles Intl
LHR
London Heathrow
7h 10m
Trip: 15 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 7 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.7
LHR
IAD
Excellent 10.0

Pros: Staff/stewards were very upbeat and pleasant, professional and were perfect at looking after very tired customers (at least for me).

ADD
FRA
Excellent 9.0

Pros: Arrival on time .

Cons: Changing birding multiple times.

FRA
JFK
Excellent 9.6

Pros: Comfy flight and early arrival.

Cons: Had to run to catch the connecting flight

MUC
JFK
Excellent 9.3

Pros: everything was great. Crew was very nice. good service. good food. Even bathrooms were located in the basement separately, nice and bigger than usual airline bathrooms.

Cons: my TV screen didn't work. Long 9.5hr trip without entertainment.

FRA
CAI
Excellent 10.0

Pros: On the airline website the price of the ticket was $3000 and I bought it for $750 on Kayak, I expected delays, cancellations or something to go wrong and justify that price drop. Nothing of that sort happened! It was a comfortable and on time trip with no problems!

Cons: Nothing!

Fri, May 31
LHR
London Heathrow
IAD
Washington Dulles Intl
24h 05m
Sat, Jun 1
IAD
Washington Dulles Intl
LHR
London Heathrow
30h 54m
Trip: 2 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 1,976 reviews
Overall
7.1
Boarding
7.1
Comfort
7.0
Crew
7.6
Entertainment
6.4
Food
6.4
EBB
BRU
Excellent 8.0

Pros: Helpful crew. They reset the screen, came around with blankets, headphones and generally tried to make the space habitable.

Cons: When I am asked to book my seat, I am usually shown a map which has no reflection on the overall reality. The seat I select is normally allocated to me but if the plane is not full (unusual) I am told there are unavailable seats that would provide more choice.

VIE
BRU
Okay 4.0

Pros: Nothing really

Cons: Late boarding, had to check the bag, had to wait forever when landed in the plane

BUD
BRU
Mediocre 3.6

Cons: It was delayed. I paid very expensive to fly on Business to be on the first row. Because every minute count for me on this trip. But it was delayed. I feel I should get a refund for sum of the money I spent

BRU
PRG
Mediocre 2.0

Cons: Delayed. Crew seemed pretty annoyed to have people aboard. Will avoid next time.

MAD
BRU
Mediocre 2.3

Pros: The food was okay but thats the best thing I can say.

Cons: There was someone that pooped themselves, another that threw up, and the flight attendants were so rude. They kept spraying stuff in the air and even those of us sitting, so much in fact I had an asthma attack and had to use my inhaler. When I told the attendant, she said "theres nothing I can do," and kept spraying the air with this awful spray. The flight harmful to my health, exhausting, and uncomfortable. BEWARE OF THIS AIRLINE! I would have preferred not gone on my trip then fly this airline!

Wed, Feb 13
LHR
London Heathrow
IAD
Washington Dulles Intl
11h 15m
Wed, Feb 27
IAD
Washington Dulles Intl
LHR
London Heathrow
10h 05m
Trip: 15 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 8,067 reviews
Overall
7.5
Boarding
7.2
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.2
SEA
KEF
Excellent 9.3

Pros: Service was great!

Cons: It would be nice to have a few more food choices for the long flight

KEF
IAD
Mediocre 2.0

Pros: N/A

Cons: Our flight was delayed 3 hours and we were instructed to rebook. After waiting over an hour to talk to an agent, we were supposedly rebooked to an Air France flight. After rushing to another terminal, the Air France check in agent told us she could not find our tickets, although the Icelandair agent gave us written confirmation. After being sent to the Air France ticketing agent (another office), we were told we were on a British Airways flight. COMPLETELY DIFFERENT AIRLINE. How were we supposed to know this? This was extremely frustrating. But BA treated us great and we can now see why they have such a great reputation.

SEA
KEF
Okay 4.6

Pros: Staff

Cons: Same old movies Back row Seats didn’t go back

DUB
KEF
Excellent 10.0

Pros: I enjoyed my flight with Iceland air. What I especially liked was how polite and helpful at the staff members were. The plane was also very nice and clean.

BWI
KEF
Excellent 10.0

Pros: The movies!

Wed, Apr 24
LHR
London Heathrow
IAD
Washington Dulles Intl
11h 40m
Sun, Apr 28
IAD
Washington Dulles Intl
LHR
London Heathrow
9h 50m
Trip: 5 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 5,388 reviews
Overall
7.5
Boarding
7.6
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.8
DUB
BOS
Mediocre 3.6

Cons: I went to the restroom in the back, and one of the flight attendants was sitting in her jump seat, with head phone on and appeared to be sleeping or resting with eyes closed. Her sprawling legs were blocking the aisle, therefore I could not get to the restroom on the other aisle that was the only one open at that time This is unacceptable. Also PA is way too loud.

BOS
DUB
Mediocre 3.3

Pros: Nothing.

Cons: Missed my connection because lingus sucks. Crew were miserable and was afraid to even approach them for water.

DUB
LAX
Excellent 9.3

Pros: Crew and food is good...especially out of Dublin..

Cons: maybe get thicker seat cushion

DUB
IAD
Mediocre 2.0

Cons: Lost my luggage

LHR
DUB
Excellent 10.0

Pros: Good price , good career

Wed, Jan 2
LHR
London Heathrow
IAD
Washington Dulles Intl
12h 40m
Fri, Jan 18
IAD
Washington Dulles Intl
LHR
London Heathrow
7h 25m
Trip: 17 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 7 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.7
LHR
IAD
Okay 5.3

Pros: Not much compared to Lufthansa from AID to Munich.

Cons: Old plane, old movies, service was mediocre

FRA
JFK
Excellent 9.6

Pros: Comfy flight and early arrival.

Cons: Had to run to catch the connecting flight

MUC
EWR
Excellent 9.6

Pros: Legroom and recline of seats of the A350

Cons: Noise of engines at cruising speed louder than most of it's size USB outlet didn't charge

ADD
FRA
Excellent 9.0

Pros: Arrival on time .

Cons: Changing birding multiple times.

LHR
IAD
Excellent 10.0

Pros: Staff/stewards were very upbeat and pleasant, professional and were perfect at looking after very tired customers (at least for me).

Fri, Dec 21
LHR
London Heathrow
IAD
Washington Dulles Intl
8h 30m
Tue, Jan 1
IAD
Washington Dulles Intl
LHR
London Heathrow
7h 10m
Trip: 12 days
8.5ExcellentShow reviews
Overall 8.5 Excellent
Based on 7 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.7
ADD
FRA
Excellent 9.0

Pros: Arrival on time .

Cons: Changing birding multiple times.

LHR
IAD
Excellent 10.0

Pros: Staff/stewards were very upbeat and pleasant, professional and were perfect at looking after very tired customers (at least for me).

MUC
EWR
Excellent 9.6

Pros: Legroom and recline of seats of the A350

Cons: Noise of engines at cruising speed louder than most of it's size USB outlet didn't charge

HAM
MUC
Excellent 8.3

Pros: Above expectation

Cons:

MUC
JFK
Excellent 9.3

Pros: everything was great. Crew was very nice. good service. good food. Even bathrooms were located in the basement separately, nice and bigger than usual airline bathrooms.

Cons: my TV screen didn't work. Long 9.5hr trip without entertainment.

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