Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Montreal to San Francisco from C$ 314

YMQ — SFO
17 Oct — 24 Oct1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to San Francisco are usually found in January or April, booked 7 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Montreal to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to San Francisco

Sat 17/105:30 p.m. -
1 stop31h 25m
Tue 20/106:00 a.m. -
1 stop22h 05m
Deal found 13/9C$ 488
Fri 2/106:45 a.m. -
1 stop8h 35m
Mon 5/101:10 p.m. -
2 stops14h 55m
Deal found 15/9C$ 516
Fri 2/106:45 a.m. -
1 stop8h 35m
Sat 10/101:00 p.m. -
1 stop15h 05m
Deal found 12/9C$ 517
Fri 2/105:30 p.m. -
1 stop21h 30m
Sun 4/106:00 a.m. -
1 stop22h 05m
Deal found 14/9C$ 519
Wed 7/107:15 a.m. -
1 stop17h 40m
Mon 12/101:00 p.m. -
1 stop15h 05m
Deal found 14/9C$ 520
Fri 16/105:00 p.m. -
2 stops18h 13m
Sun 18/106:00 a.m. -
1 stop11h 30m
Deal found 16/9C$ 522
Fri 2/105:45 p.m. -
2 stops21h 15m
Thu 22/106:00 a.m. -
1 stop14h 45m
Deal found 14/9C$ 523
Thu 1/107:15 a.m. -
1 stop17h 40m
Thu 8/106:00 a.m. -
2 stops15h 25m
Deal found 15/9C$ 524
Wed 2/124:15 p.m. -
1 stop26h 35m
Thu 10/124:40 p.m. -
2 stops28h 50m
Deal found 15/9C$ 526
Thu 15/107:15 a.m. -
1 stop17h 40m
Fri 23/101:00 p.m. -
1 stop15h 05m
Deal found 16/9C$ 527
Fri 2/105:45 p.m. -
2 stops21h 15m
Sat 10/101:00 p.m. -
1 stop15h 05m
Deal found 14/9C$ 529

Find flight deals from Montreal to San Francisco

Round-trip from

C$ 488

One-way from

C$ 314

Popular in

July

Cheapest in

January

Average price

C$ 734

Good round-trip deal

C$ 793 or less

Good one-way deal

C$ 433 or less
WestJet
  • WestJet
  • 17/10-20/10
  • 2 total stops
  • 53h 30m total
  • Montreal to San Francisco
Search Deals
Air Transat
  • Air Transat
  • 10/10-31/12
  • 1 total stop
  • 8h 35m total
  • Montreal to San Francisco
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 107 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to San Francisco.
Search Deals
Price to beat on a one-way flight from Montreal (YMQ) to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Montreal to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 20/10

6:35 p.m.-9:48 p.m.

Nonstop6h 13m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 390

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 20/11

4:15 p.m.-8:25 p.m.

3 stops31h 10m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 393

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Sat 10/10

6:35 p.m.-9:48 p.m.

Nonstop6h 13m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 395

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 1/10

6:35 p.m.-9:48 p.m.

Nonstop6h 13m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 395

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 14/10

6:35 p.m.-9:48 p.m.

Nonstop6h 13m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 396

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 30/9

9:15 a.m.-3:33 p.m.

1 stop9h 18m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 1/10

1:06 p.m.-8:45 p.m.

1 stop10h 39m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 409
Quickest round-trip

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 6/10

8:10 a.m.-11:17 a.m.

Nonstop6h 07m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 424

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 7/10

8:10 a.m.-11:17 a.m.

Nonstop6h 07m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 424

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 20/11

6:45 a.m.-12:45 p.m.

1 stop9h 00m

San Francisco

Sun 29/11

1:45 p.m.-12:35 a.m.

1 stop7h 50m

C$ 523

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Montreal to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Montreal with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Montreal to San Francisco

What is the cheapest month to book a flight from Montreal to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Montreal to San Francisco (average of C$ 589). Flying from Montreal to San Francisco in June is currently the most expensive (average of C$ 845). 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 SFO?

When flying from Montreal to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Montreal to San Francisco

The most flights from YMQ to SFO 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 San Francisco?

Airfare is below average for this route at the moment.
Montreal to San Francisco flights typically cost between C$ 614 and C$ 831 in October.
The cheapest round-trip price found within the last 5 days was C$ 488 on WestJet (17 Oct-20 Oct).

What’s the top layover airport for flights from Montreal to San Francisco?

Toronto (YYZ) – chosen by Cheapflights users on 99% of one-stop itineraries from Montreal to San Francisco on Cheapflights.

What’s the cheapest layover airport for flights from Montreal to San Francisco?

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 587.

What’s the fastest layover option from Montreal to San Francisco?

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 48m.

Which airport typically offers the quickest layover for flights from Montreal to San Francisco?

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 33m.

How often are flights from Montreal to San Francisco delayed?

About 26% of weekly flights between Montreal and San Francisco have experienced delays in the past year, with the average delay time being 138 minutes.

What is the most punctual flight time for Montreal to San Francisco flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Montreal to San Francisco flights?

Over the past year, United Airlines has had the lowest number of delays on this route, with just 25% of flights being delayed.

How far ahead should I book a flight from Montreal to San Francisco?

To ensure you get the cheapest price possible for a flight from Montreal to San Francisco, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from Montreal to San Francisco, such as Porter Airlines,United Airlines, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
462 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Porter Airlines
8.0
Very good
462 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
United Airlines
7.4
Good
10,217 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Canada
7.1
Good
11,644 reviews
Porter Airlines
8.0
Very good
462 reviews
Check prices

Comfort

8.0

Crew

8.6

Food

7.6

Overall

8.0

Boarding

8.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Related info for your journey

  • What airport do you fly into for flights to San Francisco from Montreal?

    Most people fly into San Francisco (SFO) if they book a flight to San Francisco from Montreal. On average, San Francisco has 9 inbound flights from Montreal per day from 5 airlines. San Francisco is conveniently located just 17.7 km from San Francisco’s city centre.

  • How long is the flight from Montreal to San Francisco?

    Airlines like Porter Airlines and Delta fly from Montreal to San Francisco in about 8h 44m. The time it takes to get you to your destination can typically vary by up to 16m. Montreal and San Francisco are separated by a distance of 4073 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Montreal to San Francisco round-trip?

    According to our current data, WestJet (C$ 288), Delta (C$ 322), and Porter Airlines (C$ 375) offers the cheapest pricing from Montreal to San Francisco. You may be able to fly from Montreal to San Francisco for 60% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Montreal to San Francisco one-way?

    The cheapest airlines for a one-way flight from Montreal to San Francisco are Porter Airlines (C$ 182), Air Canada (C$ 282), and American Airlines (C$ 291).

  • What are the most reliable airlines from Montreal to San Francisco?

    No one likes to see their flight delayed. When booking a flight from Montreal to San Francisco consider choosing Brussels Airlines (58%), Air New Zealand (58%) or United Airlines (54%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Montreal to San Francisco?

    While on average a flight from Montreal to San Francisco is generally C$ 1,485, our data shows the cheapest flight currently is C$ 374. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Francisco), you can expect to pay C$ 442 for that flight.

  • Can I find deals for flights from Montreal to San Francisco that include hotel bookings?

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

  • How can I find direct flights from Montreal to San Francisco?

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

  • Can I find deals for business class flights from Montreal to San Francisco?

    Yes. Cheapflights offers flight deals from Montreal to San Francisco 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 San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Montreal to San Francisco (average of C$ 589). Flying from Montreal to San Francisco in June is currently the most expensive (average of C$ 845). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Clara
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Manteca
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Fly from Montreal to San Francisco on these airlines

Air Canada flights from Montreal to San Francisco
United Airlines flights from Montreal to San Francisco

Top 5 airlines flying from Montreal to San Francisco

AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 288AverageC$ 503FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 322AverageC$ 722FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 375AverageC$ 566FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 432AverageC$ 785FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 470AverageC$ 753FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

How does Cheapflights help users find flights from Montreal to San Francisco?

Deals for Montreal to San Francisco flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Montreal to San Francisco?

Millions of users choose and trust Cheapflights to book the best flight deals from Montreal to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Montreal to San Francisco with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Montreal to San Francisco, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Montreal to San Francisco become cheaper?

Not ready to book yet? You can track prices for flights from Montreal to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

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.