What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to London, Ontario?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to London, Ontario flight should consider departing on Friday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in London, Ontario ranges from 2.8 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. March is typically the driest time to visit London, Ontario when rainfall is around 2.8 in.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 21.2 F).

What is the cheapest time of day to fly from IAD to YXU?

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to London, Ontario at noon. Doing so could potentially save you 18% on the flight price compared to flying in the morning, which is usually more expensive.

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

London (YXU) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to London. You should not have trouble finding flights to London from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the London airport from Washington, D.C. Dulles Intl. It is only a 5.3 mi journey from London (YXU) to London’s city center.

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.

$417+ Flights from Washington, D.C. Dulles Intl Airport to London, ON

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Dulles Intl to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to London

Round-trip from	$593 (Air Canada)
One-way from	$417 (Air Canada)

From Washington, D.C. Dulles Intl to London

Search Deals

One-way flight from Washington, D.C. Dulles Intl 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 julio 29, 2025.

mar. 10/213:36 pmIAD - YXU

1 stop5h 51mMultiple Airlines

mar. 10/285:45 amYXU - IAD

1 stop6h 00mMultiple Airlines

Deal found 7/27

$593

mar. 10/211:00 pmIAD - YXU

2 stops8h 27mAir Canada

mar. 10/289:25 amYXU - IAD

2 stops6h 56mAir Canada

Deal found 7/27

$616

mié. 9/103:48 pmIAD - YXU

2 stops29h 39mUnited Airlines

mié. 9/176:10 amYXU - IAD

2 stops23h 12mUnited Airlines

Deal found 7/26

$761

vie. 8/16:45 pmIAD - YXU

1 stop10h 29mWestJet

mié. 8/66:00 amYXU - IAD

1 stop11h 54mWestJet

Deal found 7/28

$1,203

Best flights from Dulles Intl to London
Discover carefully curated flight deals from Dulles Intl to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 29, 2025.

mar. 10/213:36 pmIAD - YXU

1 stop5h 51mMultiple Airlines

mar. 10/285:45 amYXU - IAD

1 stop6h 00mMultiple Airlines

Deal found 7/27

$593

mar. 10/211:00 pmIAD - YXU

2 stops8h 27mAir Canada

mar. 10/289:25 amYXU - IAD

2 stops6h 56mAir Canada

Deal found 7/27

$616

mié. 9/103:48 pmIAD - YXU

2 stops29h 39mUnited Airlines

mié. 9/176:10 amYXU - IAD

2 stops23h 12mUnited Airlines

Deal found 7/26

$761

Last-minute flights from Dulles Intl to London
Discover last-minute flight deals from Dulles Intl to London. Data last updated julio 29, 2025 and is based on user searches.

vie. 8/16:45 pmIAD - YXU

1 stop10h 29mWestJet

mié. 8/66:00 amYXU - IAD

1 stop11h 54mWestJet

Deal found 7/28

$1,203

vie. 8/810:20 amIAD - YXU

1 stop4h 42mAir Canada

dom. 8/109:55 amYXU - IAD

1 stop3h 47mAir Canada

Deal found 7/28

$993

vie. 8/88:25 amIAD - YXU

2 stops8h 42mMultiple Airlines

dom. 8/105:55 pmYXU - IAD

1 stop15h 42mMultiple Airlines

Deal found 7/28

$1,219

One-way flights from Dulles Intl to London
Search for one-way flight options from Dulles Intl to London. Find affordable one-way fares based on user searches. Data last updated julio 29, 2025.

mar. 8/2610:20 amIAD - YXU

1 stop4h 42mAir Canada

Deal found 7/29

$417

mar. 12/234:30 pmIAD - YXU

1 stop4h 51mUnited Airlines

Deal found 7/29

$469

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 10/21

3:36 pm-9:27 pm

1 stop5h 51m

London

mar. 10/28

5:45 am-11:45 am

1 stop6h 00m

$593

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 10/21

1:00 pm-9:27 pm

2 stops8h 27m

London

mar. 10/28

9:25 am-4:21 pm

2 stops6h 56m

$616

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mié. 9/10

3:48 pm-9:27 pm

2 stops29h 39m

London

mié. 9/17

6:10 am-5:22 am

2 stops23h 12m

$761

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 8/26

10:20 am-3:02 pm

1 stop4h 42m

$417

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

mar. 12/23

4:30 pm-9:21 pm

1 stop4h 51m

$469

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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.

Reviews of airlines servicing London

See what other customers who have flown with United Airlines and Air Canada from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,899 reviews

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

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

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

What airport do you fly into for flights to London from Washington, D.C. Dulles Intl?
London (YXU) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to London. You should not have trouble finding flights to London from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the London airport from Washington, D.C. Dulles Intl. It is only a 5.3 mi journey from London (YXU) to London’s city center.
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.

See more FAQs

Grand Bend

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Dulles Intl to London

Dulles Intl to Pearson Intl flights

Reagan-National to Pearson Intl flights

Reagan-National to Pierre Elliott Trudeau Intl flights

Dulles Intl to Toronto Island flights

Dulles Intl to Pierre Elliott Trudeau Intl flights

Baltimore to Pearson Intl flights

Baltimore to Pierre Elliott Trudeau Intl flights

Reagan-National to Toronto Island flights

Baltimore to Toronto Island flights

Dulles Intl to Ottawa flights

Reagan-National to Ottawa flights

Dulles Intl to Hamilton flights

Baltimore to Ottawa flights

Baltimore to Sault Ste Marie flights

Reagan-National to London flights

Dulles Intl to Sudbury flights

Baltimore to Windsor flights

Reagan-National to Hamilton flights

Reagan-National to Windsor flights

Dulles Intl to Sault Ste Marie flights

Baltimore to London flights

Dulles Intl to Thunder Bay flights

Reagan-National to Thunder Bay flights

Baltimore to North Bay flights

Dulles Intl to Timmins flights

Baltimore to Thunder Bay flights

Dulles Intl to Kingston flights

Reagan-National to Kingston flights

Baltimore to Kingston flights

Reagan-National to Sault Ste Marie flights

Complete your trip

London, Ontario car rentals

Toronto Pearson Intl Airport car rentals

Hamilton Airport car rentals

London Airport car rentals

Toronto Region of Waterloo Intl Airport car rentals

Sarnia Airport car rentals

Toronto car rentals

Ottawa car rentals

Windsor car rentals

Niagara Falls car rentals

Kingston car rentals

Kitchener car rentals

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.

$417+ Cheap flights from Dulles Intl (IAD) to London, ON (YXU)

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to London with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to London

Round-trip from

One-way from

Find flight deals from Dulles Intl to London

Cheapest flights from Dulles Intl to LondonExplore 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 julio 29, 2025.

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 julio 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to London that are best for you.

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.

Reviews of airlines servicing London

See what other customers who have flown with United Airlines and Air Canada from Washington, D.C. Dulles Intl Airport to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

Traveling to a place near London?

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.

Alternative routes for Dulles Intl to London

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

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 julio 29, 2025.