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Cheap flights from Montreal to Washington, D.C. Dulles Intl Airport from C$ 236

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 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — IAD
3 Dec — 10 Dec1
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 3 November 2025.

Tue 2/121:40 p.m.YUL - IAD
1 stop3h 34mPorter Airlines
Tue 9/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 2/11C$ 337
Fri 5/128:55 a.m.YUL - IAD
1 stop8h 19mPorter Airlines
Mon 8/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 2/11C$ 341
Sat 15/118:55 a.m.YUL - IAD
1 stop3h 34mPorter Airlines
Sun 16/116:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 1/11C$ 343
Fri 28/116:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Fri 19/1211:40 a.m.IAD - YUL
1 stop3h 40mPorter Airlines
Deal found 31/10C$ 364
Fri 21/116:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Tue 25/116:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 1/11C$ 368
Thu 20/111:40 p.m.YUL - IAD
1 stop3h 34mPorter Airlines
Mon 24/116:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 3/11C$ 369
Thu 20/111:40 p.m.YUL - IAD
1 stop3h 34mPorter Airlines
Thu 11/1211:40 a.m.IAD - YUL
1 stop4h 50mPorter Airlines
Deal found 2/11C$ 372
Tue 2/127:00 p.m.YUL - IAD
Nonstop1h 59mMultiple Airlines
Tue 9/126:30 p.m.IAD - YUL
1 stop4h 15mMultiple Airlines
Deal found 2/11C$ 382
Thu 18/121:40 p.m.YUL - IAD
1 stop3h 34mPorter Airlines
Mon 29/126:30 p.m.IAD - YUL
1 stop4h 15mPorter Airlines
Deal found 2/11C$ 386
Tue 2/127:00 p.m.YUL - IAD
Nonstop1h 59mAir Canada
Tue 9/129:45 a.m.IAD - YUL
Nonstop1h 53mAir Canada
Deal found 2/11C$ 393
Wed 10/126:45 a.m.YUL - IAD
1 stop3h 39mPorter Airlines
Sat 3/111:40 a.m.IAD - YUL
1 stop4h 50mPorter Airlines
Deal found 3/11C$ 394

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 3 November 2025.

Round-trip from

C$ 337

One-way from

C$ 236

Popular in

December

Cheapest in

February

Average price

C$ 493

Good round-trip deal

C$ 783 or less

Good one-way deal

C$ 332 or less
Porter Airlines
  • Porter Airlines
  • 2/12-9/12
  • 2 total stops
  • 7h 49m total
  • Montreal to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 15/12
  • Nonstop
  • 1h 59m total
  • Montreal to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 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 3 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

Fri 21/11

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

1 stop3h 39m

Washington, D.C. Dulles Intl

Tue 25/11

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

1 stop4h 15m

C$ 368

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 20/11

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

Nonstop1h 54m

Washington, D.C. Dulles Intl

Sun 23/11

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

Nonstop1h 45m

C$ 396

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Sat 15/11

8:55 a.m.-12:29 p.m.

1 stop3h 34m

Washington, D.C. Dulles Intl

Sun 16/11

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

Nonstop1h 45m

C$ 404

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 24/12

11:10 a.m.-3:46 p.m.

1 stop4h 36m

Washington, D.C. Dulles Intl

Thu 1/1

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

Nonstop1h 53m

C$ 413

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 20/11

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

Nonstop1h 54m

Washington, D.C. Dulles Intl

Thu 27/11

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

1 stop5h 22m

C$ 413

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Mon 24/11

9:26 a.m.-9:32 p.m.

2 stops12h 06m

Washington, D.C. Dulles Intl

Fri 5/12

5:59 p.m.-11:59 p.m.

1 stop6h 00m

C$ 434

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 3/12

9:35 a.m.-6:21 p.m.

2 stops8h 46m

Washington, D.C. Dulles Intl

Fri 5/12

5:59 p.m.-11:59 p.m.

1 stop6h 00m

C$ 434

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 5/12

4:45 p.m.-11:08 p.m.

1 stop6h 23m

Washington, D.C. Dulles Intl

Mon 8/12

10:08 a.m.-6:54 p.m.

2 stops8h 46m

C$ 434

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Sat 22/11

9:26 a.m.-11:19 p.m.

2 stops13h 53m

Washington, D.C. Dulles Intl

Mon 1/12

3:35 p.m.-11:59 p.m.

1 stop8h 24m

C$ 434

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 15/1

9:34 a.m.-8:37 p.m.

2 stops11h 03m

Washington, D.C. Dulles Intl

Mon 19/1

7:15 a.m.-4:57 p.m.

1 stop9h 42m

C$ 434

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

Showing 1-10 of 19 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$ 222). Flying from Montreal to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 390). 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 3 November 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 2 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 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 3 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?

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 3 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
384 reviews
Check prices

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
United Airlines
7.4
Good
8,997 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.
Air Canada
7.1
Good
10,394 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Kelly,Nov 2025

YVR - YUL

I recently flew with Porter Airlines on Flight PD372 on October 30th, and unfortunately, had a very disappointing experience. At the gate, one of their attendants gave me two boarding passes. I assumed these were for my itinerary from Vancouver to Montreal and back, but one of the boarding passes unexpectedly included a connecting flight to Toronto, which was never part of my booking or invoice. As a result of this error, my checked baggage was mistakenly routed to Toronto. When I contacted Porter’s customer service, I spoke to an agent who apologized on behalf of the attendant (employee number 13209961) and promised to have my luggage flown back to Montreal. However, shortly after, I was told there was nothing they could do except for me to travel to Toronto myself to pick up my bag. This is highly unreasonable and unfair, considering the issue was caused by their staff printing the wrong boarding pass. This entire situation caused me significant inconvenience and stress. I expected Porter to correct the mistake and deliver my luggage as originally planned, but instead, I was left with the burden of fixing an error that was not mine. I even have a photo of the staff badge of the employee who made the promise, yet the company still failed to honor it. I hope Porter Airlines reviews their internal communication and baggage handling procedures to prevent this from happening to other passengers. Customer care and responsibility fell short in this experience, and I am still waiting for a satisfactory resolution.

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 54m. Porter Airlines provides one of the quickest options available for as low as C$ 396. 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$ 305. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at C$ 345 and C$ 369, respectively. Porter Airlines is 34% 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 Avianca (93%), Republic Airways (93%) and Copa Airlines (81%).

  • 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$ 236. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl) can be booked for C$ 302 on average, our data indicates C$ 1,276 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$ 222). Flying from Montreal to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of C$ 390). 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

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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 3 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 305AverageC$ 382FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 345AverageC$ 487FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 369AverageC$ 522FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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

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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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