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Cheap flights from Montreal to San Francisco from C$ 341

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 19/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SFO
17 Aug — 24 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to San Francisco are usually found in January or October, booked 65 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Montreal to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to San Francisco
Explore the most affordable flight options available from Montreal to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 July 2026.

Thu 27/87:15 a.m.
YUL
-
SFO
1 stop12h 25m
WestJet
Tue 8/96:00 a.m.
SFO
-
YUL
1 stop14h 45m
WestJet
Deal found 15/7C$ 516
Fri 21/85:45 p.m.
YUL
-
SFO
2 stops31h 10m
WestJet
Sun 30/86:00 a.m.
SFO
-
YUL
1 stop14h 45m
WestJet
Deal found 17/7C$ 518
Tue 15/95:30 p.m.
YUL
-
SFO
1 stop26h 10m
WestJet
Sun 20/91:00 p.m.
SFO
-
YUL
2 stops24h 45m
WestJet
Deal found 15/7C$ 520
Thu 20/86:45 a.m.
YUL
-
SFO
2 stops12h 55m
WestJet
Tue 25/86:05 p.m.
SFO
-
YUL
1 stop10h 00m
WestJet
Deal found 14/7C$ 522
Fri 18/98:00 p.m.
YUL
-
SFO
1 stop28h 55m
WestJet
Mon 21/91:00 p.m.
SFO
-
YUL
2 stops24h 45m
WestJet
Deal found 16/7C$ 523
Mon 14/98:00 p.m.
YUL
-
SFO
1 stop28h 55m
WestJet
Thu 17/91:00 p.m.
SFO
-
YUL
2 stops24h 45m
WestJet
Deal found 17/7C$ 525
Fri 2/108:00 p.m.
YUL
-
SFO
1 stop19h 00m
WestJet
Sun 4/101:00 p.m.
SFO
-
YUL
2 stops24h 45m
WestJet
Deal found 15/7C$ 526
Thu 20/87:15 a.m.
YUL
-
SFO
1 stop12h 25m
WestJet
Sun 23/86:00 a.m.
SFO
-
YUL
1 stop14h 45m
WestJet
Deal found 13/7C$ 527
Sat 24/106:45 a.m.
YUL
-
SFO
1 stop8h 35m
Porter Airlines
Mon 2/111:45 p.m.
SFO
-
YUL
1 stop7h 50m
Porter Airlines
Deal found 16/7C$ 530
Wed 23/96:45 a.m.
YUL
-
SFO
2 stops12h 55m
WestJet
Tue 29/91:00 p.m.
SFO
-
YUL
2 stops24h 45m
WestJet
Deal found 16/7C$ 532
Thu 20/86:45 a.m.
YUL
-
SFO
2 stops12h 55m
WestJet
Wed 26/86:05 p.m.
SFO
-
YUL
1 stop10h 00m
WestJet
Deal found 13/7C$ 533

Find flight deals from Montreal to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to San Francisco (SFO). 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 18 July 2026.

Round-trip from

C$ 516

One-way from

C$ 341

Popular in

July

Cheapest in

January

Average price

C$ 797

Good round-trip deal

C$ 775 or less

Good one-way deal

C$ 794 or less
WestJet
  • WestJet
  • 27/8-8/9
  • 2 total stops
  • 27h 10m total
  • Montreal to San Francisco
Search Deals
Porter Airlines
  • Porter Airlines
  • 19/11
  • 1 total stop
  • 9h 00m total
  • Montreal to San Francisco
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

 
Customize your flight search to find flights from Montreal to San Francisco 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 18 July 2026.
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 - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 15/10

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

Nonstop6h 13m

San Francisco

Mon 26/10

6:30 a.m.-7:35 p.m.

1 stop10h 05m

C$ 677

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 28/8

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

Nonstop6h 13m

San Francisco

Mon 31/8

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

Nonstop5h 37m

C$ 684

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 13/8

6:10 a.m.-11:25 a.m.

1 stop8h 15m

San Francisco

Sat 22/8

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

Nonstop5h 37m

C$ 691

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

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

Nonstop6h 13m

San Francisco

Sat 29/8

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

Nonstop5h 37m

C$ 770

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 27/8

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

Nonstop6h 13m

San Francisco

Mon 31/8

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

Nonstop5h 37m

C$ 770

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 21/8

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

Nonstop6h 13m

San Francisco

Sun 30/8

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

Nonstop5h 37m

C$ 770

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

2:20 p.m.-1:15 a.m.

1 stop13h 55m

San Francisco

Wed 5/8

8:10 a.m.-4:44 p.m.

Nonstop5h 34m

C$ 777

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

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

Nonstop6h 13m

San Francisco

Wed 26/8

5:00 a.m.-5:30 p.m.

1 stop9h 30m

C$ 777

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

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

Nonstop6h 13m

San Francisco

Sat 5/9

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

Nonstop5h 37m

C$ 777
Quickest round-trip

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 20/8

8:10 a.m.-11:21 a.m.

Nonstop6h 11m

San Francisco

Mon 24/8

8:10 a.m.-4:44 p.m.

Nonstop5h 34m

C$ 778

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/7

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
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 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$ 590). Flying from Montreal to San Francisco in June is currently the most expensive (average of C$ 850). 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?

Find hourly flight availability from Montreal to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 July 2026.

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

Explore weekly flight availability from Montreal to San Francisco. 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 18 July 2026.

The most flights from YMQ to SFO are scheduled on a Tuesday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

How much does it cost to fly round-trip from Montreal to San Francisco?

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

Share of one-stop round-trip flights from Montreal to San Francisco chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 95% of one-stop itineraries from Montreal to San Francisco on Cheapflights.

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

Average round-trip fare for 1-stop flights from Montreal to San Francisco, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 471.

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

Shortest average travel time for 1-stop one-way flights from Montreal to San Francisco, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 51m.

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

Average layover duration for 1-stop one-way flights from Montreal to San Francisco, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

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 23% of weekly flights between Montreal and San Francisco have experienced delays in the past year, with the average delay time being 135 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?

Thursday 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, Air Canada has had the lowest number of delays on this route, with just 23% 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 83 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

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated 18 July 2026.
Read through reviews of airlines operating flights from Montreal to San Francisco, such as Porter Airlines,United Airlines, andWestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
445 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
445 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,006 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
WestJet
7.2
Good
3,409 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,352 reviews
Porter Airlines
8.0
Very good
445 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

Find useful and relevant information for your journey from Montreal to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 8 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 United Airlines fly from Montreal to San Francisco in about 6h 13m. The time it takes to get you to your destination is usually consistent. Montreal and San Francisco are separated by a distance of 4073 km. Most flights are nonstop.

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

    According to our current data, WestJet (C$ 289), Delta (C$ 323), and Porter Airlines (C$ 377) offers the cheapest pricing from Montreal to San Francisco. You may be able to fly from Montreal to San Francisco for 58% 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$ 239), Air Canada (C$ 281), and American Airlines (C$ 288).

  • 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 (59%), Air Canada (58%) or United Airlines (58%) 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$ 1,319, our data shows the cheapest flight currently is C$ 327. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Francisco), you can expect to pay C$ 461 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$ 590). Flying from Montreal to San Francisco in June is currently the most expensive (average of C$ 850). 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

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Fly from Montreal to San Francisco on these airlines

Choose from the following airlines for your flight from Montreal to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 18 July 2026.
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

Discover the top 5 airlines that operate flights from Montreal to San Francisco. 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 18 July 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 289AverageC$ 506FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 323AverageC$ 726FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Porter AirlinesCheapestC$ 377AverageC$ 574FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 380AverageC$ 713FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 466AverageC$ 709FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 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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