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Cheap flights from Montreal to San Francisco from C$ 252

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SFO
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to San Francisco are usually found in May or September, booked 18 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 22 March 2026.

Wed 6/56:45 a.m.
YUL
-
SFO
1 stop8h 35m
Porter Airlines
Wed 13/51:20 p.m.
SFO
-
YUL
1 stop8h 17m
Porter Airlines
Deal found 18/3C$ 432
Mon 1/67:20 p.m.
YUL
-
SFO
2 stops19h 40m
WestJet
Fri 5/66:05 p.m.
SFO
-
YUL
1 stop10h 00m
WestJet
Deal found 18/3C$ 434
Tue 14/46:45 a.m.
YUL
-
SFO
1 stop9h 00m
Porter Airlines
Tue 21/41:45 p.m.
SFO
-
YUL
1 stop7h 50m
Porter Airlines
Deal found 17/3C$ 435
Tue 5/56:45 a.m.
YUL
-
SFO
1 stop8h 35m
Porter Airlines
Tue 12/51:20 p.m.
SFO
-
YUL
1 stop8h 17m
Porter Airlines
Deal found 18/3C$ 436
Fri 29/56:45 a.m.
YUL
-
SFO
2 stops18h 10m
WestJet
Wed 3/66:05 p.m.
SFO
-
YUL
1 stop10h 00m
WestJet
Deal found 18/3C$ 438
Tue 2/66:45 a.m.
YUL
-
SFO
2 stops12h 55m
WestJet
Wed 3/66:05 p.m.
SFO
-
YUL
1 stop10h 00m
WestJet
Deal found 18/3C$ 440
Tue 2/66:45 a.m.
YUL
-
SFO
1 stop8h 35m
Multiple Airlines
Thu 4/66:05 p.m.
SFO
-
YUL
1 stop10h 00m
Multiple Airlines
Deal found 18/3C$ 442
Wed 15/46:45 a.m.
YUL
-
SFO
1 stop9h 00m
Porter Airlines
Thu 30/41:45 p.m.
SFO
-
YUL
1 stop7h 50m
Porter Airlines
Deal found 17/3C$ 444
Sat 9/56:45 a.m.
YUL
-
SFO
1 stop8h 35m
Porter Airlines
Sat 16/51:20 p.m.
SFO
-
YUL
1 stop8h 17m
Porter Airlines
Deal found 18/3C$ 446
Sun 10/56:45 a.m.
YUL
-
SFO
1 stop8h 35m
Porter Airlines
Mon 11/51:20 p.m.
SFO
-
YUL
1 stop8h 17m
Porter Airlines
Deal found 18/3C$ 447
Tue 14/46:45 a.m.
YUL
-
SFO
1 stop9h 00m
Porter Airlines
Wed 6/51:20 p.m.
SFO
-
YUL
1 stop8h 17m
Porter Airlines
Deal found 18/3C$ 449
Thu 9/46:45 a.m.
YUL
-
SFO
1 stop9h 00m
Porter Airlines
Thu 7/51:20 p.m.
SFO
-
YUL
1 stop8h 17m
Porter Airlines
Deal found 17/3C$ 450

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 22 March 2026.

Round-trip from

C$ 432

One-way from

C$ 252

Popular in

December

Cheapest in

May

Average price

C$ 642

Good round-trip deal

C$ 879 or less

Good one-way deal

C$ 491 or less
Porter Airlines
  • Porter Airlines
  • 6/5-13/5
  • 2 total stops
  • 16h 52m total
  • Montreal to San Francisco
Search Deals
Porter Airlines
  • Porter Airlines
  • 8/5
  • 1 total stop
  • 8h 35m total
  • Montreal to San Francisco
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 22 March 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

Tue 5/5

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

1 stop8h 35m

San Francisco

Wed 6/5

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

1 stop8h 17m

C$ 464

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 1/5

6:10 a.m.-1:23 p.m.

1 stop10h 13m

San Francisco

Mon 4/5

11:56 p.m.-10:40 a.m.

1 stop7h 44m

C$ 551

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 16/4

6:35 p.m.-1:17 a.m.

1 stop9h 42m

San Francisco

Thu 7/5

11:05 p.m.-7:45 p.m.

1 stop17h 40m

C$ 553

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

6:10 a.m.-5:12 p.m.

2 stops14h 02m

San Francisco

Sun 10/5

6:30 a.m.-5:30 p.m.

1 stop8h 00m

C$ 553

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 7/4

5:00 p.m.-12:39 a.m.

1 stop10h 39m

San Francisco

Tue 14/4

11:52 p.m.-10:40 a.m.

1 stop7h 48m

C$ 579

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Sun 5/4

6:00 a.m.-2:42 p.m.

1 stop11h 42m

San Francisco

Wed 8/4

8:00 a.m.-11:44 p.m.

1 stop12h 44m

C$ 604
Quickest round-trip

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 21/8

6:35 p.m.-9:50 p.m.

Nonstop6h 15m

San Francisco

Sun 23/8

11:46 p.m.-8:16 a.m.

Nonstop5h 30m

C$ 612

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 17/7

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

1 stop8h 35m

San Francisco

Mon 3/8

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

1 stop8h 17m

C$ 626

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 4/9

6:35 p.m.-9:50 p.m.

Nonstop6h 15m

San Francisco

Sun 13/9

11:46 p.m.-8:16 a.m.

Nonstop5h 30m

C$ 628

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 21/8

6:35 p.m.-9:50 p.m.

Nonstop6h 15m

San Francisco

Sun 6/9

11:46 p.m.-8:16 a.m.

Nonstop5h 30m

C$ 628

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/3

Showing 1-10 of 19 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

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

Use this chart to determine the optimal time to book a round-trip flight from Montreal to San Francisco. Price data was last updated on 13 March 2026.

To ensure you get the cheapest price possible for a flight from Montreal to San Francisco, you should look to book at least 18 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.

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

Currently, April is the cheapest month in which you can book a flight from Montreal to San Francisco (average of C$ 336). Flying from Montreal to San Francisco in January is currently the most expensive (average of C$ 439). 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 22 March 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 22 March 2026.

The most flights from YMQ to SFO are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 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 93% 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$ 544.

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 49m.

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 20% of weekly flights between Montreal and San Francisco have experienced delays in the past year, with the average delay time being 149 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 Monday 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 20% of flights being delayed.

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 22 March 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
426 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
426 reviews
Porter Airlines
8.0
Very good
426 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,458 reviews
Porter Airlines
8.0
Very good
426 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
WestJet
7.2
Good
3,300 reviews
Porter Airlines
8.0
Very good
426 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,831 reviews
Porter Airlines
8.0
Very good
426 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.0

Boarding

8.2

Food

7.6

Crew

8.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 4 inbound flights from Montreal per day from 5 airlines. San Francisco is conveniently located just 19.0 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 8h 35m. The time it takes to get you to your destination can typically vary by up to 1h 38m. 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, Delta (C$ 254), WestJet (C$ 283), and Porter Airlines (C$ 334) offers the cheapest pricing from Montreal to San Francisco. You may be able to fly from Montreal to San Francisco for 57% 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$ 234), Air Canada (C$ 263), and United Airlines (C$ 285).

  • 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 (62%), Air Canada (62%) or United Airlines (62%) 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$ 1,366, our data shows the cheapest flight currently is C$ 263. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - San Francisco), you can expect to pay C$ 409 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, April is the cheapest month in which you can book a flight from Montreal to San Francisco (average of C$ 336). Flying from Montreal to San Francisco in January is currently the most expensive (average of C$ 439). 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
Burlingame
South San Francisco
Scotts Valley
Novato
Santa Clara
Vallejo

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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 22 March 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 22 March 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 254AverageC$ 672FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 283AverageC$ 387FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 334AverageC$ 486FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 392AverageC$ 587FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 448AverageC$ 617FlexibilityNo 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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