Skyscanner

Cheap flights from Montreal to Washington Dulles

Roundtrip selected
origin
    selected
    destination
      selected
      Travelers and cabin class, 1 Adult, Economy

      Compare Montreal to Washington Dulles flight deals

      Find the cheapest month or even day of the year to fly to Washington Dulles

      Book the best Washington Dulles fare with no extra fees

      Flight deals from Montreal to Washington Dulles

      Looking for a cheap last-minute deal or the best round-trip flight from Montreal to Washington Dulles? Find the lowest prices on one-way and round-trip tickets right here.
      Washington, D.C..C$334 per passenger.Departing Fri, Aug 22, returning Sun, Aug 24.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Fri, Aug 22, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Aug 24, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$334, select.
      Washington, D.C..C$336 per passenger.Departing Wed, Oct 1, returning Thu, Oct 2.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Wed, Oct 1, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Thu, Oct 2, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$336, select.
      Washington, D.C..C$337 per passenger.Departing Fri, Sep 26, returning Thu, Oct 2.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Fri, Sep 26, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Thu, Oct 2, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$337, select.
      Washington, D.C..C$338 per passenger.Departing Fri, Aug 29, returning Sun, Sep 7.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Fri, Aug 29, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Sep 7, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$338, select.
      Washington, D.C..C$339 per passenger.Departing Thu, Sep 18, returning Sun, Sep 21.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Thu, Sep 18, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Sun, Sep 21, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$339, select.
      Washington, D.C..C$341 per passenger.Departing Mon, Aug 18, returning Fri, Oct 10.Round-trip flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Montreal Pierre Elliott Trudeau on Mon, Aug 18, arriving in Washington Dulles.Inbound indirect flight with Porter Airlines, departing from Washington Dulles on Fri, Oct 10, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$341, select.
      Washington, D.C..C$369 per passenger.Departing Wed, Aug 27, returning Mon, Sep 1.Round-trip flight with United.Outbound direct flight with United departing from Montreal Pierre Elliott Trudeau on Wed, Aug 27, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Mon, Sep 1, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$369, select.
      Washington, D.C..C$369 per passenger.Departing Tue, Sep 9, returning Tue, Sep 16.Round-trip flight with United.Outbound direct flight with United departing from Montreal Pierre Elliott Trudeau on Tue, Sep 9, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Tue, Sep 16, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From C$369, select.

      Find the cheapest month to fly from Montreal to Washington Dulles

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Montreal to Washington Dulles flights are currently cheapest in August.
      Aug
      from C$334
      Sep
      from C$339
      Oct
      from C$336
      Nov
      from C$407
      Dec
      from C$426
      Jan
      from C$425
      Feb
      from C$422
      Mar
      from C$422
      Apr
      from C$434
      May
      from C$434
      Jun
      from C$434
      Jul
      from C$561

      Direct flights from Montreal to Washington Dulles

      Montreal to Washington Dulles: Alternative routes

      Compare routes from Montreal to Washington, D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

      Montreal to Washington, D.C.: Flight information

      The things to know before you go.
      Cheapest flight foundC$334
      Cheapest month to flyAugust
      Average flight time1 hr, 56 mins
      Most popular airlineAir Canada
      Average flights per week174

      Finding cheap flights from Montreal to Washington Dulles: Frequently asked questions

      The best price we found for a round-trip flight from Montreal to Washington Dulles is C$334. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      1 hour and 56 minutes is the average flight time from Montreal to Washington Dulles.
      Air Canada, United and Republic Airways fly direct from Montreal to Washington Dulles.
      There are 87 flights per week flying from Montreal to Washington Dulles, as of August 2025.
      The cheapest month to fly from Montreal to Washington Dulles is usually August.
      After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Montreal to Washington Dulles Airport on Friday, August 22, 2025.
      Yes – the average flight time is 1 hour and 56 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
      We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Washington, D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

      Flying from Montreal to Washington Dulles International Airport (IAD): What you need to know

      • Montreal's main base, Montreal-Pierre Elliott Trudeau International Airport (YUL), is where plenty of awesome adventures begin. Explore your departure options from here for your flight from Montreal to Washington Dulles International Airport (IAD).

      • The average duration of a direct Montreal to Washington Dulles International Airport flight is 1 hour 55 minutes.

      • Washington DC (where Washington Dulles International Airport is located) and Montreal share the UTC-4 timezone. You'll have no time difference to factor in for your trip.

      • Montreal-Pierre Elliott Trudeau International Airport (YUL) to Washington Dulles International Airport (IAD) is the most popular route. There are 24 direct weekly flights to choose from. If you have things to do before heading off, take the last flight with Air Canada at 7:10pm. Choose the first YUL to IAD departure with United Airlines at 5:45am if you'd rather get going earlier.

      • Your flight from Montreal to IAD won't wait if you're late, so get to the airport with time to spare. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.

      • If you're flying during a public holiday or other peak period, give yourself more time. Arrive two hours before domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

      Airports in Montreal

      Montreal-Pierre Elliott Trudeau International Airport (YUL)

      • Montreal-Pierre Elliott Trudeau International Airport (YUL) provides a hassle-free way to reach your destination. Nonstop flights from Montreal to Washington Dulles International Airport (IAD) leave from this terminal.

      • United Airlines is a well-known carrier that offers direct flights from Montreal to Washington Dulles International Airport taking off from YUL.

      • United Airlines is the airline with the highest passenger demand for flights from YUL to IAD.

      • With an impressive 82.58% of services arriving as planned, Air Canada is the most punctual carrier operating on this route.

      • YUL is around 26 kilometres from central Montreal. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 25 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the trip time to be around 45 minutes.

      • Planning to catch an early flight from Montreal to Washington Dulles International Airport? Avoid the stress of rushing to the terminal (and get some extra shut-eye) by staying at one of these hotels close to Montreal-Pierre Elliott Trudeau International Airport:

      • 64.89% of flights leaving from Montreal-Pierre Elliott Trudeau International Airport touch down at their destination on time.

      • YUL's address is 975 Romeo Vachon Street North.

      St. Hubert Airport (YHU)

      About Washington Dulles International Airport (IAD)

      Getting from Washington Dulles International Airport (IAD) to central Washington DC

      • Washington Dulles International Airport to the centre of Washington DC is roughly 40 kilometres. If you're renting a car or taking a cab, plan ahead to make your trip as easy as possible. Journey times may vary based on the time of day and traffic conditions.

      • Travelling by public transport takes about 1 hour 10 minutes.

      How to find the cheapest flights from Montreal to Washington Dulles International Airport (IAD)

      • The lowest price we've found for a one-way ticket from Montreal to Washington Dulles International Airport is C$199. For a return flight on this route, the best price is C$334. Depending on when you book and the availability, these fares could change.

      • Lock in cheap flights from Montreal to IAD by booking one month ahead. Based on our research, that's the ideal time frame for bagging a bargain.

      • Organize your trip for June. That's the best month for landing a great bargain on Montreal to Washington Dulles International Airport tickets. If you're open to different travel dates, use the 'Whole month' tool to find the cheapest price across each month.

      • Locking in a cheap flight ticket from Montreal to IAD is a piece of cake with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch when the price has dropped.

      • Chase down a great fare on a flight from Montreal to Washington Dulles International Airport with the help of the filters. Choose your preferred departure and arrival times, airlines and number of stops. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest.'

      The best time to fly from Montreal to Washington Dulles International Airport (IAD)

      • July is when most people book flights from Montreal to Washington Dulles International Airport (IAD). Plan your visit to Washington DC in February if you'd rather avoid peak season.

      • When booking your Montreal to IAD flight ticket, consider the kind of weather you prefer. July is the warmest month in Washington DC, with temperatures ranging from 19ºC (66ºF) to 33ºC (91ºF).

      • January has temperatures of between -6ºC (21ºF) and 10ºC (50ºF). Search for cheap tickets from Montreal to Washington Dulles International Airport around that time if you want to travel in cooler conditions.

      More about Washington DC

      Explore more of the United States

      • Washington DC has plenty to offer, but there are so many other parts of the United States waiting to be explored. Around 225 kilometres north-east of Washington DC, a trip to Philadelphia will keep you on the go. Check out popular attractions like Independence Hall, Liberty Bell and Philadelphia Museum of Art.

      • If you're looking to explore another side of the United States, consider Virginia Beach, about 274 kilometres south-east of Washington DC. Virginia Beach Oceanfront, Virginia Beach Boardwalk and Resort Beach are among the biggest draws.

      Plan the rest of your trip from Montreal to Washington, D.C.

      Prices shown on this page are estimated lowest prices only. Found in the last 45 days.