IAD - LHR
Find cheap flights from Washington Dulles Airport to London Heathrow Airport from $250
This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight departing on 11/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.Round-trip
1 adult
Economy
Fri 7/7
Fri 7/14
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Travel better, cheaper and quicker. We've already found some great deals that could save you time and moneyWhen are you traveling?Good to know
Low season | February |
|---|---|
High season | July |
Cheapest flight | $250 |
Average price round-trip | $961 |
Good deal round-trip | $831 |
Good deal one-way | $621 |
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Washington Dulles Airport to London Heathrow Airport
(avg. price over the last 2 weeks)
or less
or less
When to book flights from Dulles Intl to Heathrow
Estimated round-trip price
Average price per month
Flight prices as travel date approaches
Top tips for finding a cheap flight from IAD to London Heathrow Airport
- Looking for a cheap flight? 25% of our users found flights on this route for $621 or less one-way and $831 or less round-trip.
- The cheapest flight from Washington Dulles Airport to London Heathrow Airport was found 73 days before departure, on average.
- Book at least 3 weeks 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 February.
- Morning departure is around 3% more expensive than an evening flight, on average*.
- You can get to Dulles International Airport (IAD) from downtown Washington, DC, by car, bus, or train. If you require quick access to the airport, we recommend taking the train. A train ticket goes for about $11 and is a great way to avoid traffic.
- Do you have a flight departure and want to return your rental car to one of the rental car companies at Dulles Intl Airport (IAD)? Follow the "Rental Car Return" signs at the airport, which lead to Autopilot Dr. Here, you'll find the rental car parking lots. Your rental company's shuttle bus should take you to the terminal.
- If you feel like relaxing after touching down in London, you can access VIP services from one of the Heathrow (LHR) lounges. They include the Plaza Premium Lounge in Terminal 4, which charges around £27.45 ($38), the Club Aspire Lounge in Terminal 3, which charges approximately £27.45 ($38), and the Sky Team Lounge in Terminal 4, which charges around £31.39 ($43.50).
- Pet lovers can travel with their pets from Washington, DC. The airport has pet relief areas outside the terminal building, right after security, and another one inside the concourses. If you plan to travel with your pet in the cabin or send him as baggage, we recommend that you contact your airline in advance.
- Washington, DC/London air route is popular among business travelers. London Heathrow Airport is located about 14 miles from London city, offering easy access to business-centric points of interest like the Royal Horticultural Halls and the Excel Business Expo Center.
FAQs for booking Washington Dulles Airport to London Heathrow Airport flights
Top 5 airlines serving from Dulles Intl to Heathrow
Scores according to KAYAK customer reviews8.0
SWISSOverall score based on 8985 reviews
86crew
78comfort
82overall
82boarding
79food
77entertainment
Airline reviews
Missed connecting train since flight was late into Zurich and I had to stay at airport hotel because of it as well as I had to repurchase train ticket
Missed connecting train since flight was late into Zurich and I had to stay at airport hotel because of it as well as I had to repurchase train ticket
Pros: "We flew Business Class. The crew was professional and attentive. The food was definitely a nice cut above."
Cons: "Nothing that I can offer. If I needed to make another trip anywhere ANZ flies, they would be my first choice every time."
Pros: "The inflight entertainment was great and helped to pass the time. The food was good for airline food."
Cons: "The flight staff was just okay - they could have been friendlier. The seat cushions seemed old - they were comfortable enough for sitting but not comfortable to sleep."
Pros: "Crew was nice"
Cons: "No WiFi on a 12 hour flight, but we could all see the full signal WiFi for the crew, aptly named. LXCrew. Awful to see them using WiFi when we are unable."
Pros: "the CREW WAS FRIENDLY AND CELEBRATING EASTER WITH THE GUESTS"
Cons: "THE FOOD WAS ADEQUATE, GIVEN THAT WE WERE ON AN AIRPLANE"
Pros: "The flight waited for us as transit after delay of the firs flight from Munich"
Cons: "1. the food was a disaster. 2. The noise on the flight from a group of passengers was terrible, no way to sleep or rest. 3. The staff did not try to calm the people the steward laugh me when I complained.."
Cons: "Plane missed connection in Zurich. Transferred next day to United who charged us another $120 for extra baggage, which we already paid at Swiss. We would like reimbursement. Gyula E Balogh"
Pros: "On time, friendly and incredibly efficient. Runs just like trains, just at a higher elevation!"
Cons: "For the home of Emmentaler I expected a bit more taste from the cheese sandwich."
Pros: "Crew was great. Ice cream was fun. Swiss chocolate was a nice surprise!"
Cons: "Short flight with no entertainment, no means to charge devices."
Cons: "first baggage should be free.....as people travel with 15-20kg hand luggage"
Cons: "everything sucked time bery bad servive starfed on flight nonacolok was sergvedngypu ilt was really disappoinyling includigbymkthrvlounhr aothee airlione"
Pros: "Specially food service and also boarding"
Cons: "They checked carry on again even you passed from the counter I felt very bad about this"
Pros: "Flight time and layover at connecting flight"
Cons: "Food needs to improved. In all other flight Indian spice is served as Asian veg flight seat are too tight"
Pros: "Professional and friendly staff. Excellent film selection."
Cons: "Not enough security staff at Istanbuñ and no one from the airline to assist. The queues were too long at security so I had to run to make my flight. Lots of other people had the same trouble and I believe my cousin missed her connection."
Pros: "The food and entertainment were okay."
Cons: "The staff was rude. The entertainment consoles didn’t work well."
Cons: "They are telling me because I booked with Kayak through PriceLine or vice versa they will not give me any hotel for my 14 hours lay over."
Pros: "I liked the food and the staff were very friendly"
Pros: "The entertainment was excellent!"
Cons: "The comfort level for that long of a flight was very poor. Seats are way too close together. There is no knee room from the seats at the front at all. People operating their video monitor is a disturbing fact for the passengers who sits in front of them."
Cons: "Service on this flight was significantly better than the Cairo flight, probably just because this flight goes to London. Welcome drink were promptly served but the food choice was still a big no-no. EVERYTHING CONSISTS OF DAIRY PRODUCT THAT I M ALLERGIC TO. When I brought this to the flight attendant's attention, none of them was apologetic and none of them tried to find out another solution to me, who was flying their airline the first time and didn't know the not-so-diverse food option."
Cons: "car seat not wrapped in plastic bag so I lost my cushions on the seat. Now my child can no longer use it."
Cons: "Noise in aircraft. Transit time between flights was too short."
Pros: "Good boarding process and crew today."
Cons: "Plane was delayed and connection in Copenhagen was missed, resulting in a five-hour delay overall."
Cons: "Seats are too small in economy to be comfortable. Boarding was unclear and confusing, mainly because I didn't have a boarding group on my boarding pass."
Cons: "I don’t like how the food on premium economy is packed in a cubic box that is really messy to eat from which the small plastic cutlery. Food quality is good, but feels like being an animal being fed from a bucket."
Pros: "Nothing."
Cons: "Everything. Our flight was delayed from our departing city because the plane was leaking water on the floor and they had to send in a special cleaning crew to try to stop it. We were not given the seats we pre picked months before when buying the ticket. The ac was broken for the first half of the flight. Then, we missed our connecting flight because of the first delay. Once we got onto a new connecting flight, it was also delayed and once again, we missed our last connecting flight and are not making it to our final destination today."
Pros: "Great flight on SAS"
Cons: "Very good food and outstanding choice of movies as entertainment."
Cons: "Tiny, hard, uncomfortable seats and cramped conditions, just about the worst 8 hours in my life"
Pros: "Plane was fine and it arrived on time."
Cons: "Main meal was awful. Crew was hard to find. Also water or juice was not served on flight after the meal (for hydration)."
Cons: "This has nothing directly with SAS, but since I experienced it during my flight there, they are responsible of it. I was waiting for the flight at the OSLO airport waiting for the flight to LONDON. I had ample time to work on my computer. In the big room by the gate there was only one spot where I found three electrical sockets hanging from a pillar or post. To my dismay none worked. My plug would fall off from each. To document, I took the pictures of the useless sockets... I complained to the lady at the boarding desk (she left before the SAS staff moved in), she did not even care... This experience frustrated me and turned an otherwise pleasant trip into a bitter one. Please install some working sockets in your waiting room! Flight SK 809 Confirmation: LN9M6O Departure: Oslo & other airports (OSL) Arrival: Heathrow (LHR) Time: Sat Dec 2 2017 3:05 pm CET - Sat Dec 2 2017 4:25 pm GMT Peace, Edip Yuksel +1 520 481 1919"
Pros: "This is obviously a very well-run airline. Boarding was efficient, the crew were warm and professional, and the overall feel of the aircraft was very Scandinavian-cool. I was most impressed with the meal service. We were served twice on our 9 hour flight, and both meals were hot, healthy, and the best I’ve had during a flight. The passenger in front of us was having a hard time with her sinuses, and the flight attendant (whose name I wish we had gotten) was very attentive and concerned for the comfort and well-being of the passenger. She insisted on doing anything she could to alleviate the woman’s difficulty. It is clear that the crew care about the passengers’ experience."
Cons: "We were unable to sleep at all during our overnight flight and landed pretty exhausted. Our seats were comfortable (complete with a moldable headrest to keep your head from bobbing around) but we felt too upright to fall asleep. The passenger in front of us reclined, but we were concerned about reclining into the already tight space of the passenger behind us. So we weren’t able to sleep, despite trying to get comfortable/somewhat horizontal. It seemed to be a mixed bag of asleep and awake passengers on the flight, so some people were unaffected by this issue."
Pros: "I liked the northern lights look after boarding upon introduction of the captain and crew members. Everyone was super personal and uninformed looked great. The best part was when they started boarding from the last row, which is the most logical and efficient way to do it"
Pros: "flight was fine."
Cons: "very disappointed Iceland Air is charging $95 for 1 piece of luggage. This is making me rethink the "deal" because it added $190 to the cost of the flight."
Pros: "The process was straight forward. There was nothing wrong but nothing special."
Pros: "Good crew and a smooth flight"
Cons: "Loudspeaker system lousy, could not hear any announcement from cocpit nor cabin crew about safety or flight progress"
Cons: "It was so HOT in our original row (13). The woman next to us passed out, no doubt because of how uncomfortably hot it was"
Pros: "Crew was friendly."
Cons: "During the flight many people (including myself) complained about the very cold temperature setting inside the cabin. Passengers who asked for a second blanket did not get any. Unfortunately, the crew never switched on the heating system in order to make the flight comfortable for most passengers."
Cons: "Agents went out of their way so my wife and I could sit together. Thanks so much!"
Pros: "Paid extra for legroom, but sadly the seat did not recline much due to being in row at the emergency exit"
Pros: "ease of boarding, the flight left Dulles at the perfect time, after all the crowds were gone"
Cons: "Our plane was broken. Initially they said an hour late and then the time before our flight increased. Because our flight was delayed, I missed I missed an important meeting."
Pros: "The crew were very nice overall but one flight attendant in particular was incredible. I didn’t get a name but he was friendly, welcoming, and kind."
Cons: "I sat in an emergency row with an empty seat to my left and really did not like how the passenger in the row behind me kept getting up and walking into my row to get his stuff from the bins."
Pros: "Amazing punctuality, both on the way out to Lisbon and on the return to London."
Cons: "Cannot really think of anything that needed attention on these flights."
Pros: "I didn’t like a thing. The crew from the gate all the way to the end was rude and nasty. The crew scanning people to get on the plane were so rude at the beginning it was the worst and I fly for my work and I’ll never fly TAP air Portugal again."
Cons: "Train the staff to be nice and pleasant"
Pros: "I liked that pillows, blankets and headphones were provided."
Cons: "Boarding was a cluster (mainly because the lines were unorganized)."
Pros: "NOTHING.....................DUE TO FLIGHT CONNECTION CANCELLATION TAP AIR PORTUGAL FORCED US TO STAY STUCK IN AMSTERDAM FOR 15 HOURS"
Cons: "EVERYTHING..........................ALL TAP AIR PORTUGAL WAS A DISASTER"
Cons: "Probably the most uncomfortable flight I have taken in a very very long time. The ride was smooth but the seat was so terribly uncomfortable. I was in pain on arrival."
Cons: "We had to pay $120 for a checked bag because it “weighed too much”. The lady at the check in counter said they were weighing everyone’s at the gate so there was no way to get around it This however was a lie and they were not checking weight and people got on without having to pay the outrageous fee"
Cons: "So many delays, no real info provided. When we had to stay overnight they didn’t mention it would take 4 hours to get our bags which actually never came. Airline industry sucks and deltas one of the worst."
Cons: "The headphone situation was confusing and no charging ports Fairly comfortable for an older plane"
Pros: "Very on time, smooth take off and landing and friendly staff."
Cons: "Perhaps spirits offered other than just wine. And a vegetarian food option."
Book cheap flights from Washington Dulles Airport to London Heathrow Airport
Recent round-trip flight deals
10/1Sun
1 stopScandinavian Airlines
23h 10mIAD-LHR
11/2Thu
1 stopScandinavian Airlines
14h 05mLHR-IAD
$424
10/1Sun
2 stopsScandinavian Airlines
18h 30mIAD-LHR
10/31Tue
1 stopScandinavian Airlines
14h 05mLHR-IAD
$429
10/3Tue
1 stopScandinavian Airlines
17h 30mIAD-LHR
10/8Sun
1 stopScandinavian Airlines
23h 50mLHR-IAD
$434
10/4Wed
1 stopScandinavian Airlines
21h 00mIAD-LHR
10/6Fri
2 stopsScandinavian Airlines
48h 50mLHR-IAD
$518
10/1Sun
1 stopScandinavian Airlines
23h 10mIAD-LHR
11/5Sun
2 stopsScandinavian Airlines
25h 15mLHR-IAD
$522
9/27Wed
1 stopScandinavian Airlines
17h 30mIAD-LHR
11/3Fri
1 stopScandinavian Airlines
14h 05mLHR-IAD
$523
10/1Sun
1 stopScandinavian Airlines
23h 10mIAD-LHR
10/22Sun
2 stopsScandinavian Airlines
23h 15mLHR-IAD
$526
10/1Sun
2 stopsScandinavian Airlines
18h 30mIAD-LHR
11/4Sat
1 stopScandinavian Airlines
14h 05mLHR-IAD
$527
9/27Wed
2 stopsScandinavian Airlines
14h 25mIAD-LHR
11/3Fri
1 stopScandinavian Airlines
14h 05mLHR-IAD
$528
10/19Thu
1 stopIcelandair
10h 20mIAD-LHR
11/8Wed
1 stopIcelandair
26h 30mLHR-IAD
$539
9/15Fri
2 stopsUnited Airlines
16h 10mIAD-LHR
9/17Sun
1 stopUnited Airlines
11h 40mLHR-IAD
$540
9/15Fri
nonstopMultiple Airlines
7h 15mIAD-LHR
9/17Sun
1 stopMultiple Airlines
13h 20mLHR-IAD
$547
10/2Mon
1 stopIcelandair
10h 20mIAD-LHR
10/16Mon
1 stopIcelandair
26h 50mLHR-IAD
$555
10/2Mon
1 stopIcelandair
10h 20mIAD-LHR
10/18Wed
1 stopIcelandair
26h 50mLHR-IAD
$556
10/2Mon
1 stopIcelandair
18h 45mIAD-LHR
10/9Mon
1 stopIcelandair
26h 50mLHR-IAD
$557
10/2Mon
1 stopIcelandair
10h 20mIAD-LHR
10/10Tue
1 stopIcelandair
26h 50mLHR-IAD
$558
10/3Tue
1 stopIcelandair
18h 45mIAD-LHR
10/9Mon
1 stopIcelandair
26h 50mLHR-IAD
$559
9/25Mon
1 stopIcelandair
18h 45mIAD-LHR
10/31Tue
1 stopIcelandair
26h 30mLHR-IAD
$561
9/28Thu
1 stopIcelandair
10h 20mIAD-LHR
10/23Mon
1 stopIcelandair
26h 50mLHR-IAD
$562
9/25Mon
1 stopIcelandair
10h 20mIAD-LHR
10/2Mon
1 stopIcelandair
26h 50mLHR-IAD
$563
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Recent one-way flight deals
11/29Wed
1 stopTAP AIR PORTUGAL
13h 55mIAD-LHR
$250
10/3Tue
1 stopIcelandair
10h 20mIAD-LHR
$263
9/11Mon
1 stopIcelandair
10h 20mIAD-LHR
$268
11/23Thu
1 stopTAP AIR PORTUGAL
14h 10mIAD-LHR
$275
11/19Sun
1 stopTAP AIR PORTUGAL
13h 55mIAD-LHR
$276
10/25Wed
1 stopTAP AIR PORTUGAL
13h 50mIAD-LHR
$277
10/10Tue
1 stopSWISS
15h 05mIAD-LHR
$286
10/18Wed
2 stopsMultiple Airlines
21h 45mIAD-LHR
$290
9/27Wed
1 stopScandinavian Airlines
17h 30mIAD-LHR
$292
9/24Sun
1 stopScandinavian Airlines
17h 30mIAD-LHR
$294
10/18Wed
1 stopTAP AIR PORTUGAL
15h 45mIAD-LHR
$311
9/18Mon
1 stopScandinavian Airlines
19h 10mIAD-LHR
$314
9/10Sun
1 stopIcelandair
10h 20mIAD-LHR
$317
9/11Mon
1 stopTurkish Airlines
22h 55mIAD-LHR
$324
8/8Tue
1 stopTurkish Airlines
18h 40mIAD-LHR
$325
8/7Mon
1 stopTurkish Airlines
37h 00mIAD-LHR
$328
9/4Mon
1 stopTurkish Airlines
37h 00mIAD-LHR
$330
9/19Tue
1 stopScandinavian Airlines
17h 30mIAD-LHR
$357
9/12Tue
2 stopsMultiple Airlines
18h 40mIAD-LHR
$360
10/12Thu
3 stopsMultiple Airlines
21h 30mIAD-LHR
$361
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Washington Dulles Airport - London Heathrow Airport Flights
Departure:
Washington Dulles Airport (IAD)United States
Destination:
London Heathrow Airport (LHR)United Kingdom
Return flight deals:
London Heathrow Airport - Washington Dulles Airport
Cabin classes:
$4,606
$2,617
$1,447
$647