Find flights
When to book
Airlines
FAQs

Cheap flights from Washington, D.C. Dulles Intl Airport to London, ON from C$ 572

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YXU
3 ago. — 10 ago.1
1 adult

Cheap flight deals from Dulles Intl to London

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to London (YXU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 29 julio 2025.

Round-trip from

C$ 814

One-way from

C$ 572
21/10-28/10
  • 21/10-28/10
  • 2 total stops
  • 11h 51m total
  • Washington, D.C. to London
Search Deals
Air Canada
  • Air Canada
  • 26/8
  • 1 total stop
  • 4h 42m total
  • Washington, D.C. to London
Search Deals

Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to London
Explore the most affordable flight options available from Dulles Intl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 julio 2025.

mar. 21/103:36 p.m.IAD - YXU
1 stop5h 51mMultiple Airlines
mar. 28/105:45 a.m.YXU - IAD
1 stop6h 00mMultiple Airlines
Deal found 27/7C$ 814
mar. 21/101:00 p.m.IAD - YXU
2 stops8h 27mAir Canada
mar. 28/109:25 a.m.YXU - IAD
2 stops6h 56mAir Canada
Deal found 27/7C$ 845
mié. 10/93:48 p.m.IAD - YXU
2 stops29h 39mUnited Airlines
mié. 17/96:10 a.m.YXU - IAD
2 stops23h 12mUnited Airlines
Deal found 26/7C$ 1,044
vie. 1/86:45 p.m.IAD - YXU
1 stop10h 29mWestJet
mié. 6/86:00 a.m.YXU - IAD
1 stop11h 54mWestJet
Deal found 28/7C$ 1,650

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 29 julio 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London that are best for you.

Fly from

Dulles Intl

Fly to

London

Route

Depart

Return

Price

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 21/10

3:36 p.m.-9:27 p.m.

1 stop5h 51m

London

mar. 28/10

5:45 a.m.-11:45 a.m.

1 stop6h 00m

C$ 814

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 21/10

1:00 p.m.-9:27 p.m.

2 stops8h 27m

London

mar. 28/10

9:25 a.m.-4:21 p.m.

2 stops6h 56m

C$ 845

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mié. 10/9

3:48 p.m.-9:27 p.m.

2 stops29h 39m

London

mié. 17/9

6:10 a.m.-5:22 a.m.

2 stops23h 12m

C$ 1,044

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 26/8

10:20 a.m.-3:02 p.m.

1 stop4h 42m

C$ 572

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 23/12

4:30 p.m.-9:21 p.m.

1 stop4h 51m

C$ 643

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Best time to book a flight from Dulles Intl to London

Have a flexible travel schedule? Discover the best time to fly to London from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to London

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario (average of C$ 243). Flying from Washington, D.C. Dulles Intl Airport to London, Ontario in December is currently the most expensive (average of C$ 478). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 29 julio 2025.
Read reviews from past customers who have flown United Airlines and Air Canada from Washington, D.C. Dulles Intl Airport to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,899 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,899 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,822 reviews
United Airlines
7.4
Good
8,899 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to London from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to London, you will be flying into London. London (YXU) is just 8.6 km from the centre of the city. London is the only London airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 0 airlines have flights to London from Washington, D.C. Dulles Intl on a regular basis.

  • Can I find deals for flights from Dulles Intl to London that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to London.

  • Can I find deals for business class flights from Dulles Intl to London?

    Yes. Cheapflights offers flight deals from Dulles Intl to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to London, Ontario (average of C$ 243). Flying from Washington, D.C. Dulles Intl Airport to London, Ontario in December is currently the most expensive (average of C$ 478). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Dulles Intl to London?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Dulles Intl to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to London?

Cheapflights helps you find that perfect flight to London from Dulles Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Dulles Intl to London with no change fees?

Certainly. Search results for flights to London from Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Dulles Intl to London become cheaper?

Not ready to book yet? You can track prices for flights from Dulles Intl to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.