Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Montreal to Washington, D.C. Dulles Intl Airport from C$ 189

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 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — IAD
22 Mar — 29 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 20 February 2026.

Sun 26/49:50 a.m.
YUL
-
IAD
1 stop7h 24m
Porter Airlines
Wed 29/411:40 a.m.
IAD
-
YUL
1 stop4h 50m
Porter Airlines
Deal found 19/2C$ 371
Fri 20/39:15 a.m.
YUL
-
IAD
Nonstop2h 14m
United Airlines
Mon 23/38:26 a.m.
IAD
-
YUL
1 stop5h 02m
United Airlines
Deal found 19/2C$ 372
Fri 17/49:15 a.m.
YUL
-
IAD
Nonstop2h 02m
United Airlines
Sun 19/48:23 a.m.
IAD
-
YUL
1 stop4h 46m
United Airlines
Deal found 19/2C$ 374
Thu 12/37:00 p.m.
YUL
-
IAD
Nonstop1h 54m
Multiple Airlines
Sun 15/36:30 p.m.
IAD
-
YUL
1 stop4h 15m
Multiple Airlines
Deal found 19/2C$ 375
Tue 2/65:00 p.m.
YUL
-
IAD
Nonstop1h 58m
Air Canada
Mon 8/65:15 p.m.
IAD
-
YUL
1 stop4h 30m
Air Canada
Deal found 19/2C$ 376
Wed 25/35:25 p.m.
YUL
-
IAD
2 stops13h 59m
Multiple Airlines
Tue 7/411:40 a.m.
IAD
-
YUL
1 stop4h 50m
Multiple Airlines
Deal found 18/2C$ 378
Mon 30/33:25 p.m.
YUL
-
IAD
1 stop5h 39m
United Airlines
Tue 31/38:23 a.m.
IAD
-
YUL
1 stop4h 46m
United Airlines
Deal found 19/2C$ 379
Tue 17/312:42 p.m.
YUL
-
IAD
1 stop5h 51m
Delta
Tue 24/37:18 a.m.
IAD
-
YUL
1 stop10h 13m
Delta
Deal found 18/2C$ 381
Tue 17/33:00 p.m.
YUL
-
IAD
1 stop6h 05m
United Airlines
Tue 24/31:13 p.m.
IAD
-
YUL
Nonstop2h 03m
United Airlines
Deal found 19/2C$ 382
Fri 20/311:10 a.m.
YUL
-
IAD
1 stop4h 36m
Air Canada
Tue 24/39:55 a.m.
IAD
-
YUL
Nonstop1h 45m
Air Canada
Deal found 19/2C$ 383
Tue 10/39:15 a.m.
YUL
-
IAD
Nonstop2h 14m
United Airlines
Tue 17/31:13 p.m.
IAD
-
YUL
Nonstop2h 03m
United Airlines
Deal found 18/2C$ 385
Tue 14/411:10 a.m.
YUL
-
IAD
1 stop4h 29m
Air Canada
Sat 18/49:55 a.m.
IAD
-
YUL
Nonstop1h 43m
Air Canada
Deal found 18/2C$ 386

Find 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 20 February 2026.

Round-trip from

C$ 371

One-way from

C$ 189

Popular in

December

Cheapest in

April

Average price

C$ 598

Good round-trip deal

C$ 552 or less

Good one-way deal

C$ 275 or less
Porter Airlines
  • Porter Airlines
  • 26/4-29/4
  • 2 total stops
  • 12h 14m total
  • Montreal to Washington, D.C.
Search Deals
Porter Airlines
  • Porter Airlines
  • 16/4
  • 1 total stop
  • 4h 04m total
  • Montreal to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 77 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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.
Search Deals

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 20 February 2026.
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

Wed 18/3

2:13 p.m.-4:21 p.m.

Nonstop2h 08m

Washington, D.C. Dulles Intl

Mon 23/3

1:13 p.m.-3:16 p.m.

Nonstop2h 03m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Mon 30/3

6:35 p.m.-8:37 p.m.

Nonstop2h 02m

Washington, D.C. Dulles Intl

Tue 31/3

8:23 a.m.-1:09 p.m.

1 stop4h 46m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

2:13 p.m.-4:21 p.m.

Nonstop2h 08m

Washington, D.C. Dulles Intl

Wed 8/4

8:20 a.m.-5:30 p.m.

1 stop9h 10m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Tue 17/3

9:15 a.m.-11:29 a.m.

Nonstop2h 14m

Washington, D.C. Dulles Intl

Mon 23/3

1:13 p.m.-3:16 p.m.

Nonstop2h 03m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 19/3

9:15 a.m.-11:29 a.m.

Nonstop2h 14m

Washington, D.C. Dulles Intl

Sun 22/3

1:13 p.m.-3:16 p.m.

Nonstop2h 03m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Wed 18/3

9:15 a.m.-11:29 a.m.

Nonstop2h 14m

Washington, D.C. Dulles Intl

Wed 25/3

1:13 p.m.-3:16 p.m.

Nonstop2h 03m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 20/3

9:15 a.m.-11:29 a.m.

Nonstop2h 14m

Washington, D.C. Dulles Intl

Mon 23/3

8:26 a.m.-1:28 p.m.

1 stop5h 02m

C$ 372

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Fri 17/4

9:15 a.m.-11:17 a.m.

Nonstop2h 02m

Washington, D.C. Dulles Intl

Sun 19/4

8:23 a.m.-1:09 p.m.

1 stop4h 46m

C$ 374

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Tue 2/6

10:30 a.m.-4:12 p.m.

1 stop5h 42m

Washington, D.C. Dulles Intl

Mon 8/6

9:45 a.m.-11:33 a.m.

Nonstop1h 48m

C$ 376

MontrealWashington, D.C.

YUL - IAD

YULIAD

Montreal Pierre Elliott Trudeau Intl

Thu 28/5

6:30 a.m.-10:46 a.m.

1 stop4h 16m

C$ 203

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/2

Showing 1-10 of 20 results
1
2

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$ 216). Flying from Montreal to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of C$ 350). 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 20 February 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 24% 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 17 February 2026.

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 20 February 2026.

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).

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 94% 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$ 403.

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: 4h 02m.

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 15m.

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 20 February 2026.
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
419 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Porter Airlines
8.0
Very good
419 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
United Airlines
7.4
Good
9,325 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Air Canada
7.1
Good
10,732 reviews
Porter Airlines
8.0
Very good
419 reviews
Check prices

Entertainment

6.9

Comfort

8.0

Crew

8.6

Boarding

8.2

Food

7.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

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 2h 08m. United Airlines provides one of the quickest options available for as low as C$ 372. 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$ 296. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at C$ 330 and C$ 360, respectively. Porter Airlines is 39% 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 Porter Airlines, with whom users have recently found tickets for as low as C$ 185. However, be on the lookout for offers from Air Canada and United Airlines, 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 Copa Airlines (90%), Republic Airways (84%) and Avianca (80%).

  • 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$ 217. While the most popular route (Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl) can be booked for C$ 322 on average, our data indicates C$ 1,030 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$ 216). Flying from Montreal to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of C$ 350). 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
Silver Spring
Warrenton
Winchester
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Herndon
Manassas
Fredericksburg
Alexandria
Rockville

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.

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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 296AverageC$ 366FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 330AverageC$ 481FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 360AverageC$ 509FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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 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.

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.