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LHR - IAD
Find cheap flights from London Heathrow Airport to Washington Dulles Airport
Round-trip
Economy
Search hundreds of travel sites at once for deals on flights to Washington Dulles Airport
Good to know
Low season |
February | Best time to beat the crowds with an average 35% drop in price. |
|---|---|---|
High season |
July | Most popular time to fly with an average 33% increase in price. |
Average price of a round-trip |
$720 | (avg. price over the last 2 weeks) |
Good deal for a round-trip |
$701 | or less |
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 $601 or less.
- The cheapest flight from London Heathrow Airport to Washington Dulles Airport was found 82 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 12% more expensive than an evening flight, on average*.
FAQs for booking London Heathrow Airport to Washington Dulles Airport flights
How long does a flight from London Heathrow Airport to Washington Dulles Airport take?
How many flights are there between London Heathrow Airport and Washington Dulles Airport?
Which airlines provide the cheapest flights from London Heathrow Airport to Washington Dulles Airport?
Do I need a passport to fly between London Heathrow Airport and Washington Dulles Airport?
Which airlines fly most frequently between London Heathrow Airport and Washington Dulles Airport?
What’s the cheapest day of the week to fly London Heathrow Airport to Washington Dulles Airport?
How does KAYAK find such low prices on flights from London Heathrow Airport to Washington Dulles Airport?
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Washington Dulles Airport?
What is the Hacker Fare option on flights from London Heathrow Airport to Washington Dulles Airport?
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Washington Dulles Airport?
Top airline flying London Heathrow to Washington Dulles Intl
Scores according to KAYAK customer reviews
7.2
TAP AIR PORTUGAL
Overall score based on 5,334 reviews
7.3
Boarding
7.2
Comfort
7.9
Crew
6.6
Entertainment
7.0
Food
Book cheap flights from London Heathrow Airport to Washington Dulles Airport (round-trip)
TAP AIR PORTUGAL
Fri, Nov 20
LHR
London Heathrow Airport
IAD
Washington Dulles Airport
13h 10m
Mon, Nov 30
IAD
Washington Dulles Airport
LHR
London Heathrow Airport
18h 30m
Trip: 11 days
Based on null reviews
Multiple Airlines
Wed, Oct 28
LHR
London Heathrow Airport
IAD
Washington Dulles Airport
24h 00m
Mon, Nov 9
IAD
Washington Dulles Airport
LHR
London Heathrow Airport
21h 20m
Trip: 13 days
Based on null reviews
TAP AIR PORTUGAL
Fri, Oct 16
LHR
London Heathrow Airport
IAD
Washington Dulles Airport
19h 10m
Wed, Oct 21
IAD
Washington Dulles Airport
LHR
London Heathrow Airport
19h 20m
Trip: 6 days
Based on null reviews
Multiple Airlines
Wed, Oct 28
LHR
London Heathrow Airport
IAD
Washington Dulles Airport
24h 00m
Fri, Nov 6
IAD
Washington Dulles Airport
LHR
London Heathrow Airport
22h 15m
Trip: 10 days
Based on null reviews
Show more results
Book cheap flights from London Heathrow Airport to Washington Dulles Airport (one-way)
Based on null reviews
Based on null reviews
Multiple Airlines
Sat, Aug 22
LHR
London Heathrow Airport
IAD
Washington Dulles Airport
34h 05m
Based on null reviews
Based on null reviews
Show more results
London Heathrow Airport - Washington Dulles Airport Flights
Departure:
London Heathrow Airport (LHR) United Kingdom
Destination:
Washington Dulles Airport (IAD) United States
Return flight deals:
Browse origins:
- Flights »
- Worldwide »
- Europe »
- United Kingdom »
- England »
- London »
- London Heathrow Airport
Browse destinations:
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.
We attempt to get accurate prices, however, prices are not guaranteed.
We attempt to get accurate prices, however, prices are not guaranteed.
Here's why:
We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.
We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.
Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.
If you have more questions or if you have a bad price to report to us,
please send us an
email
and someone from our team will get back to you promptly.
^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last
72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may
not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags.
Please check the carriers' sites.
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