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Cheap flights from Montreal to San Francisco from C$ 359

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

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 5/128:00 p.m. -
2 stops22h 50m
Sun 13/124:40 p.m. -
2 stops28h 50m
Deal found 27/8C$ 490
Wed 30/96:45 a.m. -
2 stops12h 55m
Thu 22/101:00 p.m. -
1 stop15h 05m
Deal found 28/8C$ 493
Thu 19/116:45 a.m. -
1 stop9h 00m
Mon 30/111:45 p.m. -
1 stop7h 50m
Deal found 27/8C$ 494
Sun 22/116:45 a.m. -
1 stop9h 00m
Tue 1/121:45 p.m. -
1 stop7h 50m
Deal found 29/8C$ 495
Thu 10/98:00 p.m. -
1 stop19h 00m
Sat 19/96:00 a.m. -
1 stop22h 05m
Deal found 27/8C$ 497
Wed 4/116:45 a.m. -
2 stops36h 05m
Sun 8/114:40 p.m. -
2 stops28h 50m
Deal found 26/8C$ 498
Fri 18/96:45 a.m. -
2 stops18h 10m
Sun 27/96:00 a.m. -
2 stops31h 45m
Deal found 27/8C$ 500
Thu 10/96:45 a.m. -
2 stops18h 10m
Mon 21/96:00 a.m. -
1 stop22h 05m
Deal found 27/8C$ 501
Sat 21/118:00 p.m. -
2 stops22h 50m
Mon 30/114:40 p.m. -
2 stops28h 50m
Deal found 27/8C$ 502
Sat 21/116:45 a.m. -
1 stop9h 00m
Mon 23/111:45 p.m. -
1 stop7h 50m
Deal found 30/8C$ 504
Wed 25/116:45 a.m. -
1 stop9h 00m
Mon 30/111:45 p.m. -
1 stop7h 50m
Deal found 28/8C$ 505
Mon 23/115:55 p.m. -
2 stops21h 50m
Sat 12/121:45 p.m. -
1 stop7h 50m
Deal found 29/8C$ 507

Find flight deals from Montreal to San Francisco

Round-trip from

C$ 490

One-way from

C$ 359

Popular in

July

Cheapest in

January

Average price

C$ 780

Good round-trip deal

C$ 768 or less

Good one-way deal

C$ 431 or less
WestJet
  • WestJet
  • 23/9-29/9
  • 4 total stops
  • 37h 40m total
  • Montreal to San Francisco
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27/9
  • 27/9
  • 3 total stops
  • 41h 29m total
  • Montreal to San Francisco
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Highest demand for flights based on searches. 9% potential increase in price (C$ 108 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 18 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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Price to beat on a round-trip flight from Montreal (YMQ) to San Francisco.
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Price to beat on a one-way flight from Montreal (YMQ) to San Francisco.
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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

Mon 5/10

6:45 a.m.-12:20 p.m.

1 stop8h 35m

San Francisco

Sat 10/10

1:20 p.m.-12:37 a.m.

1 stop8h 17m

C$ 604

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 16/2

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

1 stop9h 00m

San Francisco

Sun 21/2

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

1 stop7h 50m

C$ 668

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 1/10

6:45 a.m.-12:20 p.m.

1 stop8h 35m

San Francisco

Fri 9/10

1:20 p.m.-12:37 a.m.

1 stop8h 17m

C$ 697
Quickest round-trip

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 2/10

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

Nonstop6h 13m

San Francisco

Wed 7/10

11:39 p.m.-8:16 a.m.

Nonstop5h 37m

C$ 827

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 7/10

11:39 p.m.-8:16 a.m.

Nonstop5h 37m

C$ 827

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 13/10

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

Nonstop6h 13m

San Francisco

Sun 25/10

6:15 a.m.-7:48 p.m.

1 stop10h 33m

C$ 828

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

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

Nonstop6h 13m

San Francisco

Fri 2/10

11:30 p.m.-10:40 a.m.

1 stop8h 10m

C$ 828

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

Mon 26/10

10:45 p.m.-2:00 p.m.

1 stop12h 15m

C$ 828

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

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

Nonstop6h 13m

San Francisco

Sun 25/10

11:59 p.m.-1:28 p.m.

1 stop10h 29m

C$ 828

MontrealSan Francisco

YUL Montreal Pierre Elliott Trudeau Intl - SFO San Francisco

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 2/10

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

Nonstop6h 13m

San Francisco

Tue 13/10

11:39 p.m.-8:16 a.m.

Nonstop5h 37m

C$ 828

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/8

Showing 1-10 of 19 resultsSorted by cheapest first
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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$ 586). Flying from Montreal to San Francisco in June is currently the most expensive (average of C$ 841). 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 Wednesday, 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 San Francisco?

Airfare is below average for this route at the moment.
Montreal to San Francisco flights typically cost between C$ 652 and C$ 853 in September.
The cheapest round-trip price found within the last 5 days was C$ 490 on WestJet (23 Sep-29 Sep).

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$ 617.

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 49m.

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 34m.

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 137 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 Saturday 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 59 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
458 reviews
Check prices

Comfort

8.0

Boarding

8.2

Food

7.6

Entertainment

6.9

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
Porter Airlines
8.0
Very good
458 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Boarding

8.2

Food

7.6

Entertainment

6.9

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
United Airlines
7.4
Good
10,151 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Boarding

8.2

Food

7.6

Entertainment

6.9

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.
Air Canada
7.1
Good
11,566 reviews
Porter Airlines
8.0
Very good
458 reviews
Check prices

Comfort

8.0

Boarding

8.2

Food

7.6

Entertainment

6.9

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

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 7 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 United Airlines fly from Montreal to San Francisco in about 6h 13m. The time it takes to get you to your destination can typically vary by up to 2h 22m. 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$ 286), Delta (C$ 320), and Porter Airlines (C$ 373) 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$ 281), and United Airlines (C$ 367).

  • 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 Air New Zealand (56%), Air Canada (52%) or United Airlines (52%) 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$ 1,614, our data shows the cheapest flight currently is C$ 341. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Francisco), you can expect to pay C$ 441 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$ 586). Flying from Montreal to San Francisco in June is currently the most expensive (average of C$ 841). 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
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$ 286AverageC$ 500FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 320AverageC$ 719FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 373AverageC$ 561FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 430AverageC$ 759FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 462AverageC$ 721FlexibilityNo 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.

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