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Cheap flights from Montreal to Washington, D.C. Dulles Intl Airport from C$ 238

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 13/12. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — IAD
25 Dec — 1 Jan1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Montreal to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to Dulles Intl
Explore the most affordable flight options available from Montreal to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 November 2025.

Wed 10/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Mon 15/1211:40 a.m.IAD - YUL
1 stop4h 50mPorter Airlines
Deal found 24/11C$ 322
Wed 10/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Wed 31/1211:40 a.m.IAD - YUL
1 stop5h 35mPorter Airlines
Deal found 24/11C$ 323
Thu 11/1211:10 a.m.YUL - IAD
1 stop4h 36mAir Canada
Sun 14/129:45 a.m.IAD - YUL
Nonstop1h 53mAir Canada
Deal found 24/11C$ 325
Sat 20/121:40 p.m.YUL - IAD
1 stop3h 34mPorter Airlines
Sat 3/111:35 a.m.IAD - YUL
1 stop6h 10mPorter Airlines
Deal found 25/11C$ 326
Thu 11/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Sun 14/1211:40 a.m.IAD - YUL
1 stop3h 40mPorter Airlines
Deal found 24/11C$ 327
Tue 23/1211:25 a.m.YUL - IAD
1 stop5h 49mPorter Airlines
Tue 30/1211:40 a.m.IAD - YUL
1 stop4h 50mPorter Airlines
Deal found 24/11C$ 329
Wed 10/127:00 p.m.YUL - IAD
Nonstop1h 59mAir Canada
Wed 31/129:00 a.m.IAD - YUL
1 stop6h 23mAir Canada
Deal found 24/11C$ 332
Mon 8/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Thu 11/1211:40 a.m.IAD - YUL
1 stop4h 50mPorter Airlines
Deal found 24/11C$ 334
Wed 17/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Sat 3/16:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 23/11C$ 336
Fri 26/1211:25 a.m.YUL - IAD
1 stop5h 49mPorter Airlines
Wed 31/1211:40 a.m.IAD - YUL
1 stop5h 35mPorter Airlines
Deal found 24/11C$ 339
Mon 22/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Mon 29/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 24/11C$ 340
Tue 9/1211:25 a.m.YUL - IAD
1 stop5h 49mPorter Airlines
Mon 15/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 24/11C$ 341

Cheap flight deals from Montreal to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to Dulles Intl (IAD). 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 25 November 2025.

Round-trip from

C$ 319

One-way from

C$ 238

Popular in

November

Cheapest in

February

Average price

C$ 660

Good round-trip deal

C$ 635 or less

Good one-way deal

C$ 293 or less
Porter Airlines
  • Porter Airlines
  • 29/12-7/1
  • 2 total stops
  • 9h 49m total
  • Montreal to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 13/12
  • 1 total stop
  • 6h 36m total
  • Montreal to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 117 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Montreal (YMQ) to Washington, D.C. Dulles Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to Dulles Intl 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 25 November 2025.
Use the filters below to find and compare flights from Montreal to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Montreal

Fly to

Dulles Intl

Route

Depart

Return

Price

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Tue 30/12

6:45 a.m.-10:24 a.m.

1 stop3h 39m

Washington, D.C. Dulles Intl

Thu 8/1

11:35 a.m.-4:30 p.m.

1 stop4h 55m

C$ 319

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 6/2

11:10 a.m.-3:49 p.m.

1 stop4h 39m

Washington, D.C. Dulles Intl

Wed 11/2

9:00 a.m.-2:22 p.m.

1 stop5h 22m

C$ 330

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 6/2

6:45 a.m.-10:22 a.m.

1 stop3h 37m

Washington, D.C. Dulles Intl

Mon 9/2

11:40 a.m.-5:45 p.m.

1 stop6h 05m

C$ 336

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 10/12

1:40 p.m.-5:14 p.m.

1 stop3h 34m

Washington, D.C. Dulles Intl

Tue 16/12

6:30 p.m.-10:45 p.m.

1 stop4h 15m

C$ 340

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 9/1

7:00 p.m.-8:54 p.m.

Nonstop1h 54m

Washington, D.C. Dulles Intl

Fri 16/1

9:00 a.m.-7:14 p.m.

2 stops10h 14m

C$ 343

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 16/1

2:45 p.m.-8:37 p.m.

1 stop5h 52m

Washington, D.C. Dulles Intl

Mon 26/1

5:26 p.m.-11:12 p.m.

1 stop5h 46m

C$ 344

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Tue 20/1

6:02 p.m.-12:24 a.m.

1 stop6h 22m

Washington, D.C. Dulles Intl

Sun 25/1

6:00 a.m.-11:45 a.m.

1 stop5h 45m

C$ 344

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Sat 7/2

6:00 a.m.-11:49 a.m.

1 stop5h 49m

Washington, D.C. Dulles Intl

Mon 9/2

5:26 p.m.-11:12 p.m.

1 stop5h 46m

C$ 344

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 9/1

7:00 p.m.-8:54 p.m.

Nonstop1h 54m

Washington, D.C. Dulles Intl

Fri 16/1

11:35 a.m.-5:45 p.m.

1 stop6h 10m

C$ 346

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 18/12

6:30 p.m.-12:12 a.m.

1 stop5h 42m

Washington, D.C. Dulles Intl

Tue 6/1

7:00 a.m.-1:42 p.m.

1 stop6h 42m

C$ 350

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/11

Showing 1-10 of 22 results
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Best time to book a flight from Montreal to Dulles Intl

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

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

Currently, March is the cheapest month in which you can book a flight from Montreal to Washington, D.C. Dulles Intl Airport (average of C$ 223). Flying from Montreal to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of C$ 381). 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.

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

Find hourly flight availability from Montreal to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 November 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 35% on flights from Montreal to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Montreal to Dulles Intl. Price data was last updated on 25 November 2025.

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

Weekly flight availability from Montreal to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Montreal to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 25 November 2025.

The most flights from YMQ to IAD are scheduled on a Monday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

How much does it cost to fly round-trip from Montreal to Washington, D.C. Dulles Intl Airport?

What’s the top layover airport for flights from Montreal to Washington, D.C. Dulles Intl Airport?

Share of one-stop round-trip flights from Montreal to Washington, D.C. Dulles Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YTZ) – chosen by Cheapflights users on 95% of one-stop itineraries from Montreal to Washington, D.C. Dulles Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Montreal to Washington, D.C. Dulles Intl Airport?

Average round-trip fare for 1-stop flights from Montreal to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YTZ) is the most affordable 1-stop option, with an average round-trip price of C$ 412.

What’s the fastest layover option from Montreal to Washington, D.C. Dulles Intl Airport?

Shortest average travel time for 1-stop one-way flights from Montreal to Washington, D.C. Dulles Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YTZ) have the shortest average one-way travel time for 1-stop routes: 3h 58m.

Which airport typically offers the quickest layover for flights from Montreal to Washington, D.C. Dulles Intl Airport?

Average layover duration for 1-stop one-way flights from Montreal to Washington, D.C. Dulles Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Toronto (YTZ) offer the fastest connection on this route, with an average layover time of 1h 13m.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated 25 November 2025.
Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAir Canada from Montreal 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.
Porter Airlines
8.0
Very good
394 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
394 reviews
Porter Airlines
8.0
Very good
394 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,043 reviews
Porter Airlines
8.0
Very good
394 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,471 reviews
Porter Airlines
8.0
Very good
394 reviews
Check prices

Food

7.6

Entertainment

7.0

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

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

  • How long is the flight from Montreal to Washington, D.C. Dulles Intl Airport?

    A quick flight from Montreal to Washington, D.C. Dulles Intl Airport can take about 3h 39m. Porter Airlines provides one of the quickest options available for as low as C$ 319. There are 785 km between Montreal and Washington, D.C. Dulles Intl Airport. This flight may include one or multiple stops.

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

    Flying on Porter Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at C$ 306. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at C$ 347 and C$ 386, respectively. Porter Airlines is 35% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Montreal to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as C$ 251. However, be on the lookout for offers from Porter Airlines and Air Canada, as they are both options that can get you from Montreal to Washington, D.C. Dulles Intl Airport for a low price.

  • What are the most reliable airlines from Montreal to Washington, D.C. Dulles Intl Airport?

    The top 3 most reliable airlines when flying from Montreal to Washington, D.C. Dulles Intl Airport are Republic Airways (88%), Avianca (87%) and Copa Airlines (85%).

  • What are the cheapest flights from Montreal to Washington, D.C. Dulles Intl Airport?

    Looking at all options, your cheapest flight can be booked for C$ 237. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl) can be booked for C$ 296 on average, our data indicates C$ 1,283 when flying from Montreal to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montreal 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 Montreal to Washington, D.C. Dulles Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from Montreal to Washington, D.C. Dulles Intl Airport (average of C$ 223). Flying from Montreal to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of C$ 381). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Warrenton
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Herndon
Arlington
Winchester
Manassas
Fredericksburg
Alexandria
Rockville

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Montreal to Dulles Intl

Discover the top 3 airlines that operate flights from Montreal to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 306AverageC$ 379FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 347AverageC$ 487FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 386AverageC$ 525FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from Montreal today with Cheapflights!

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Montreal to Dulles Intl.

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

Need flexible booking options for your flight to Dulles Intl from Montreal? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Montreal today and book when prices fit your budget.

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