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Cheap flights from Montreal to Washington, D.C. Dulles Intl Airport from C$ 212

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — IAD
17 Oct — 24 Oct1
1 adult
1 adult, Economy

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 17 September 2025.

Round-trip from

C$ 345

One-way from

C$ 212

Popular in

September

Cheapest in

February

Average price

C$ 625

Good round-trip deal

C$ 741 or less

Good one-way deal

C$ 444 or less
Porter Airlines
  • Porter Airlines
  • 11/10-16/10
  • 2 total stops
  • 10h 16m total
  • Montreal to Washington, D.C.
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Porter Airlines
  • Porter Airlines
  • 1/10
  • 1 total stop
  • 4h 21m total
  • Montreal to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 112 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Montreal (YMQ) to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Montreal (YMQ) to Washington, D.C. Dulles Intl.
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Find flight deals from Montreal to Dulles Intl

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 17 September 2025.

Tue 30/910:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Mon 6/104:20 p.m.IAD - YUL
1 stop3h 50mPorter Airlines
Deal found 15/9C$ 340
Sat 11/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Thu 16/104:20 p.m.IAD - YUL
1 stop5h 55mPorter Airlines
Deal found 16/9C$ 345
Fri 3/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Mon 6/104:20 p.m.IAD - YUL
1 stop5h 55mPorter Airlines
Deal found 16/9C$ 351
Sat 6/128:55 a.m.YUL - IAD
1 stop3h 34mPorter Airlines
Tue 9/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 17/9C$ 352
Sat 11/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Sat 18/104:20 p.m.IAD - YUL
1 stop3h 50mPorter Airlines
Deal found 15/9C$ 355
Fri 31/106:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Mon 3/116:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 16/9C$ 356
Wed 1/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Sun 5/1011:35 a.m.IAD - YUL
1 stop4h 25mPorter Airlines
Deal found 15/9C$ 359
Thu 23/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Tue 28/106:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 15/9C$ 360
Fri 24/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Sun 26/1011:40 a.m.IAD - YUL
1 stop6h 05mPorter Airlines
Deal found 15/9C$ 362
Fri 5/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Tue 9/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 17/9C$ 365
Sat 11/1010:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Mon 20/104:20 p.m.IAD - YUL
1 stop3h 50mPorter Airlines
Deal found 15/9C$ 366
Tue 18/117:00 p.m.YUL - IAD
Nonstop1h 54mAir Canada
Sun 30/119:45 a.m.IAD - YUL
Nonstop1h 45mAir Canada
Deal found 16/9C$ 367

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 17 September 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

Mon 24/11

9:15 a.m.-11:23 a.m.

Nonstop2h 08m

Washington, D.C. Dulles Intl

Sun 30/11

9:45 a.m.-11:30 a.m.

Nonstop1h 45m

C$ 369

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 16/10

9:15 a.m.-11:13 a.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Thu 23/10

1:00 p.m.-3:00 p.m.

Nonstop2h 00m

C$ 369

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 24/10

7:10 p.m.-9:05 p.m.

Nonstop1h 55m

Washington, D.C. Dulles Intl

Sun 26/10

9:45 a.m.-11:38 a.m.

Nonstop1h 53m

C$ 369

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 26/11

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

Nonstop1h 54m

Washington, D.C. Dulles Intl

Tue 2/12

9:45 a.m.-11:38 a.m.

Nonstop1h 53m

C$ 369

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 10/10

9:15 a.m.-11:13 a.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Sat 18/10

5:37 p.m.-7:45 p.m.

Nonstop2h 08m

C$ 369

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 24/10

7:10 p.m.-9:05 p.m.

Nonstop1h 55m

Washington, D.C. Dulles Intl

Mon 27/10

9:45 a.m.-11:38 a.m.

Nonstop1h 53m

C$ 370

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 10/10

9:15 a.m.-11:13 a.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Wed 15/10

8:30 a.m.-1:09 p.m.

1 stop4h 39m

C$ 381

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 26/11

9:15 a.m.-11:23 a.m.

Nonstop2h 08m

Washington, D.C. Dulles Intl

Tue 2/12

8:45 a.m.-1:28 p.m.

1 stop4h 43m

C$ 381

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 7/11

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

1 stop3h 39m

Washington, D.C. Dulles Intl

Sun 9/11

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

1 stop4h 15m

C$ 382

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Sun 12/10

9:15 a.m.-11:13 a.m.

Nonstop1h 58m

Washington, D.C. Dulles Intl

Sat 18/10

5:37 p.m.-7:45 p.m.

Nonstop2h 08m

C$ 400

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

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, February is the cheapest month in which you can book a flight from Montreal to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from Montreal 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.

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 17 September 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 36% 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 14 September 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 evenings 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 17 September 2025.

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

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 (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 405.

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 56m.

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 17 September 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
7.9
Good
365 reviews
Check prices

Comfort

7.9

Entertainment

7.0

Food

7.6

Boarding

8.2

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
365 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Comfort

7.9

Entertainment

7.0

Food

7.6

Boarding

8.2

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,926 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Comfort

7.9

Entertainment

7.0

Food

7.6

Boarding

8.2

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
365 reviews
Check prices

Comfort

7.9

Entertainment

7.0

Food

7.6

Boarding

8.2

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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 1h 55m. United Airlines provides one of the quickest options available for as low as C$ 369. There are 785 km between Montreal and Washington, D.C. Dulles Intl Airport. All flights are typically direct.

  • 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$ 299. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at C$ 338 and C$ 362, respectively. Porter Airlines is 36% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 Sun Country Air (100%), Avianca (92%) and Copa Airlines (91%).

  • 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$ 212. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl) can be booked for C$ 351 on average, our data indicates C$ 833 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, February is the cheapest month in which you can book a flight from Montreal to Washington, D.C. Dulles Intl Airport (average of C$ 256). Flying from Montreal 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

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
Herndon
Warrenton
Hanover
Reston
Fairfax
Ellicott City
Oxon Hill
Gaithersburg
Winchester
Arlington
Alexandria
Manassas
Fredericksburg
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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 299AverageC$ 383FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 338AverageC$ 478FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 362AverageC$ 545FlexibilityNo 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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