What are the cheapest airlines flying from London, Ontario to Washington, D.C. Dulles Intl Airport round-trip?

According to our current data, Air Canada (C$ 749), and United Airlines (C$ 933) offers the cheapest pricing from London, Ontario to Washington, D.C. Dulles Intl Airport.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London, Ontario to Washington, D.C. Dulles Intl Airport as you normally would.

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

Most people fly from London (YXU) if they book a flight from London to Washington, D.C. Dulles Intl. On average, London has 0 outbound flights to Washington, D.C. Dulles Intl per day from 0 airlines. London is conveniently located just 8.6 km from London’s city centre.

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

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

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

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

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

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

C$ 749+ Flights from London, ON to Washington, D.C. Dulles Intl Airport

Cheap flight deals from London to Dulles Intl

Round-trip from	C$ 749

Air Canada
3/9-8/9
2 total stops
8h 40m total
London to Washington, D.C.

Search Deals

Find flight deals from London to Dulles Intl

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

Wed 3/99:55 a.m.YXU - IAD

1 stop3h 43mAir Canada

Mon 8/910:20 a.m.IAD - YXU

1 stop4h 57mAir Canada

Deal found 29/7C$ 749

Thu 4/910:00 a.m.YXU - IAD

1 stop4h 25mMultiple Airlines

Sun 7/93:41 p.m.IAD - YXU

1 stop5h 48mMultiple Airlines

Deal found 27/7C$ 764

Sun 16/115:45 a.m.YXU - IAD

2 stops15h 36mUnited Airlines

Sun 23/115:15 p.m.IAD - YXU

1 stop4h 06mUnited Airlines

Deal found 27/7C$ 933

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

Wed 3/99:55 a.m.YXU - IAD

1 stop3h 43mAir Canada

Mon 8/910:20 a.m.IAD - YXU

1 stop4h 57mAir Canada

Deal found 29/7C$ 749

Thu 4/910:00 a.m.YXU - IAD

1 stop4h 25mMultiple Airlines

Sun 7/93:41 p.m.IAD - YXU

1 stop5h 48mMultiple Airlines

Deal found 27/7C$ 764

Sun 16/115:45 a.m.YXU - IAD

2 stops15h 36mUnited Airlines

Sun 23/116:30 a.m.IAD - YXU

2 stops10h 36mUnited Airlines

Deal found 27/7C$ 933

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 3/9

9:55 a.m.-1:38 p.m.

1 stop3h 43m

Washington, D.C. Dulles Intl

Mon 8/9

10:20 a.m.-3:17 p.m.

1 stop4h 57m

C$ 749

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 4/9

10:00 a.m.-2:25 p.m.

1 stop4h 25m

Washington, D.C. Dulles Intl

Sun 7/9

3:41 p.m.-9:29 p.m.

1 stop5h 48m

C$ 764

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 16/11

5:45 a.m.-9:21 p.m.

2 stops15h 36m

Washington, D.C. Dulles Intl

Sun 23/11

6:30 a.m.-5:06 p.m.

2 stops10h 36m

C$ 933

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London 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 London to Washington, D.C. Dulles Intl Airport

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

Currently, February is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from London, Ontario to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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 Dulles Intl

Check out reviews from past customers who have flown with United Airlines and Air Canada from London to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,899 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

United Airlines

7.4

Good

8,899 reviews

United Airlines

7.4

Good

8,899 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Air Canada

7.1

Good

9,822 reviews

United Airlines

7.4

Good

8,899 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Related info for your journey

What airport do you fly from for flights from London to Washington, D.C. Dulles Intl?
Most people fly from London (YXU) if they book a flight from London to Washington, D.C. Dulles Intl. On average, London has 0 outbound flights to Washington, D.C. Dulles Intl per day from 0 airlines. London is conveniently located just 8.6 km from London’s city centre.
What are the cheapest airlines flying from London, Ontario to Washington, D.C. Dulles Intl Airport round-trip?
According to our current data, Air Canada (C$ 749), and United Airlines (C$ 933) offers the cheapest pricing from London, Ontario to Washington, D.C. Dulles Intl Airport.
Can I find deals for flights from London to Dulles Intl that include hotel bookings?
Yes. In addition to deals on London to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Dulles Intl.
Can I find deals for business class flights from London to Dulles Intl?
Yes. Cheapflights offers flight deals from London to Dulles Intl 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 London, Ontario to Washington, D.C. Dulles Intl Airport?
Currently, February is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from London, Ontario to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of C$ 352). 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

Herndon

Warrenton

Hanover

Reston

Fairfax

Ellicott City

Oxon Hill

Gaithersburg

Winchester

Arlington

Alexandria

Manassas

Fredericksburg

Rockville

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

Deals for London to Dulles Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Dulles Intl from London 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 London to Dulles Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Dulles Intl, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on London to Dulles Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London, ON to Washington, D.C. Dulles Intl Airport from C$ 749

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Dulles Intl

Round-trip from

Find flight deals from London to Dulles Intl

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

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

Cheapflights Fare Finder

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

Best time to book a flight from London to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from London with our price prediction graph.

Cheapflights Insights

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

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

Reviews of airlines servicing Dulles Intl

Check out reviews from past customers who have flown with United Airlines and Air Canada from London to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up 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 London to Dulles Intl. 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 from for flights from London to Washington, D.C. Dulles Intl?

What are the cheapest airlines flying from London, Ontario to Washington, D.C. Dulles Intl Airport round-trip?

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

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

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

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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Dulles Intl

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

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 London to Dulles Intl?

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

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

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

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