YUL - SFO

C$ 230 Find Cheap Flights from Montreal to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to San Francisco departing on 3/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to San Francisco.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to San Francisco.
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Flights Deals

Cheap Flights from Montreal to San Francisco (YUL-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to San Francisco

qui, 4 set - qui, 4 set
United Airlines Logo
11:23 a.m. - 7:05 p.m.YUL-SFO
10h 42m2 stops
United Airlines Logo
11:45 p.m. - 8:16 a.m.SFO-YUL
5h 31mdirect
C$ 336United Airlines
Find Deal
qui, 4 set - qui, 4 set
United Airlines Logo
6:15 a.m. - 3:12 p.m.YUL-SFO
11h 57m2 stops
United Airlines Logo
9:30 p.m. - 10:40 a.m.SFO-YUL
10h 10m2 stops
C$ 344United Airlines
Find Deal
qui, 30 out - dom, 2 nov
Porter Airlines Logo
6:45 a.m. - 12:40 p.m.YUL-SFO
8h 55m1 stop
Porter Airlines Logo
1:40 p.m. - 12:35 a.m.SFO-YUL
7h 55m1 stop
C$ 381Porter Airlines
Find Deal
qui, 4 set - qua, 10 set
Air Canada Logo
4:45 p.m. - 7:51 p.m.YUL-SFO
6h 06mdirect
Air Canada Logo
11:40 a.m. - 8:05 p.m.SFO-YUL
5h 25mdirect
C$ 387Air Canada
Find Deal
qui, 4 set - qua, 10 set
Air Canada Logo
8:25 a.m. - 3:28 p.m.YUL-SFO
10h 03m1 stop
Air Canada Logo
11:35 a.m. - 12:36 a.m.SFO-YUL
10h 01m1 stop
C$ 389Air Canada
Find Deal
seg, 8 set - ter, 16 set
WestJet Logo
6:45 a.m. - 5:14 p.m.YUL-SFO
13h 29m2 stops
WestJet Logo
12:50 p.m. - 12:41 a.m.SFO-YUL
8h 51m1 stop
C$ 402WestJet
Find Deal
qua, 10 set - qua, 17 set
Porter Airlines Logo
6:45 a.m. - 12:23 p.m.YUL-SFO
8h 38m1 stop
Porter Airlines Logo
1:25 p.m. - 12:37 a.m.SFO-YUL
8h 12m1 stop
C$ 415Porter Airlines
Find Deal
seg, 8 set - seg, 15 set
WestJet Logo
6:45 a.m. - 5:14 p.m.YUL-SFO
13h 29m2 stops
WestJet Logo
12:50 p.m. - 12:41 a.m.SFO-YUL
8h 51m1 stop
C$ 429WestJet
Find Deal
ter, 16 dez - dom, 18 jan
American Airlines Logo
3:45 p.m. - 9:08 a.m.YUL-SFO
20h 23m2 stops
American Airlines Logo
9:50 a.m. - 10:45 p.m.SFO-YUL
9h 55m2 stops
C$ 437American Airlines
Find Deal
qua, 3 set - dom, 7 set
American Airlines Logo
10:38 a.m. - 7:16 p.m.YUL-SFO
11h 38m2 stops
American Airlines Logo
6:30 a.m. - 10:57 p.m.SFO-YUL
13h 27m1 stop
C$ 444American Airlines
Find Deal
Expert advice

Expert advice for your flight from Montreal to San Francisco

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada's Preferred Economy seats offer up to 10 cm extra legroom for added comfort.


Air Canada's Wi-Fi is free for messaging to Aeroplan members; full internet costs extra.

Read more about Air Canadaby Stefanie Waldek
United Airlines

United's Economy Plus seats offer up to 15 cm more legroom than standard economy.


United offers free messaging on most flights; T-Mobile customers get free streaming Wi-Fi.

Airports
YUL

Use YULExpress to schedule a security checkpoint time up to 72 hours before departure for a smoother experience.

Read more about YULby Mark Stachiew
SFO

Take BART from SFO for an affordable and efficient ride to popular San Francisco neighborhoods.

Read more about SFOby Blane Bachelor
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada and United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Mark Stachiew

Mark Stachiew

Expert on YUL

Mark Stachiew

Mark Stachiew

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Read more
Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Booking Insights

KAYAK's insights & trends for Montreal to San Francisco flights

Get data-powered insights and trends into flights from Montreal to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Montreal to San Francisco?

The average price of all round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco clicked on KAYAK for each day over the last 12 months.

For Montreal to San Francisco, Thursday is the cheapest day to fly on average and Monday is the most expensive. Flying from San Francisco back to Montreal, the best deals are generally found on Friday, with Sunday being the most expensive.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco is April, where tickets cost C$ 477 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is C$ 757 and C$ 649 respectively.

Can I save money by flying with a layover from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 1,433 on average.

How far in advance should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco, you should book around 2 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.


Good to know

Low seasonJune
Cheapest flightC$ 230
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly (12% more expensive on average)
Flight from Montreal to San Francisco

When to book flights from Montreal to San Francisco

Are your dates flexible? Find out the best times to travel from Montreal to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Montreal to San Francisco flights

  • Are there pet relief areas at San Francisco International Airport?

    San Francisco Airport has eight pet relief areas available 24h a day, with drinking areas and fences for your pet’s comfort and security. At arrivals you’ll find pet relief areas located near the baggage claim levels in Terminal 1 (Courtyard 2), Terminal 2 (Courtyard 3) and Terminal 3 (Courtyard 4). Just follow the walkways with the paw prints to find the closest pet relief area.

  • What’s the fastest public transportation option to get from the airport to San Francisco’s city centre?

    Taking the BART train is the easiest and fastest public transportation option when travelling from the airport to the city centre. Trains depart about four times every hour from the BART station in the international terminal. The trip takes about 30min, and a one-way ticket costs $21 (about C$ 28). Most hotels in downtown San Francisco are within walking distance of a BART station.

  • Is there a museum at San Francisco Airport?

    The SFO Museum was founded in 1980, and San Francisco International Airport was the first airport to house this type of institution. Travellers passing through the airport as well as San Francisco residents can visit the exhibitions for free, with only nine of the 25 galleries being located post-security check.

  • Where can I rent a car at San Francisco International Airport?

    The car rental company offices at San Francisco International Airport are located in the Rental Car Center. To get there, you must take the free AirTrain Blue Line that connects all terminals, available 24h a day.

  • What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco?

    In the last 3 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco was C$ 167 for a one-way ticket and C$ 244 for a round-trip.

  • Which airlines offer Wi-Fi service onboard planes from Montreal to San Francisco?

    Air Canada, and United Airlines offer inflight Wi-Fi service on the Montreal to San Francisco flight route.

  • Which aircraft models fly most regularly from Montreal to San Francisco?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Montreal to San Francisco flight route.

  • Which airline alliances offer flights from Montreal to San Francisco?

    Star Alliance is the only airline alliance operating flights between Montreal and San Francisco.

  • On which days can I fly direct from Montreal to San Francisco?

    There are direct flights from Montreal to San Francisco on a daily basis.

  • Which is the best airline for flights from Montreal to San Francisco, Porter Airlines or United Airlines?

    The two airlines most popular with KAYAK users for flights from Montreal to San Francisco are Porter Airlines and United Airlines. With an average price for the route of C$ 392 and an overall rating of 8.0, Porter Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 639 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Montreal to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Montreal to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Montreal with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 501 or less one-way and C$ 928 or less round-trip.
  • The minute your flight from Montreal to San Francisco lands, you’ll see why San Francisco International Airport (SFO) is one of the best airports in the United States. The modern facilities are all about making your airport experience a pleasant one.
  • If you need to freshen up after your flight but don't want to go to a hotel, head over to FreshenUp for a shower. It's open 24/7, and a 30 min deluxe shower with complimentary shampoo, soap and lotion costs $25 (about C$ 33.33) per person. Need a power nap instead? They offer that service too. You can rent a nap room suite for $40 (about C$ 53.32) for 1h.
  • Flights from Montreal to San Francisco aren't the longest, but if you need to stretch after your trip, head over to the yoga room in Terminal 2. Not too many airports can say they have one, and in fact, San Francisco Airport is one of the first. The best part? You can use the room for free.
  • If you need medical assistance or left your prescribed medication at home, visit the SFO Medical Clinic in the main hall of the international terminal.
  • SFO is well-connected to the city centre through a variety of transportation options that fit all needs and all budgets. The most convenient option is to travel by taxi or to use a rideshare app, in order to reach the city centre in under 30 min. A taxi ride can cost between $46 and $66 (C$ 61.32 and C$ 87.98).

Prefer to fly direct from Montreal to San Francisco?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Montreal Pierre Elliott Trudeau Intl to San Francisco.
Find which airlines fly direct from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco Airport, which days they fly and book direct flights.

Direct departures

Montreal Pierre Elliott Trudeau Intl to San Francisco

Monday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Tuesday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Wednesday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Thursday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Friday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Saturday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Sunday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

See more nonstop flights

Direct returns

San Francisco to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Tuesday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Wednesday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Thursday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Friday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Saturday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

Sunday

Air Canada,Air New Zealand,Brussels Airlines, +1 more

Air Canada,Air New Zealand, +2 more

See more nonstop flights

Reviews of the top 5 airlines flying from Montreal to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Montreal to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Montreal to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Porter AirlinesOverall score based on 318 reviews
8.2Boarding
8.7Crew
7.6Food
8.0Comfort
7.0Entertainment
Airline reviews

All good the seats a little tight and no I pad screen

10.0 ExcellentAnonymous, Jul 2025YYZ - RSW
Read more Porter Airlines reviews

All good the seats a little tight and no I pad screen

Everything was good except the fact you charge more for a carry on bag vs a check in bag and to top it off in US$ that was not impressive

Our flight was cancelled at the last minute for maintenance reasons and we were rebooked on a late flight when we purposefully booked our flight to be home early due to work.

Seemed like an old plane. Very noisy. The seat cushions were so old that the metal bracing of the seats were poking through. There was plenty of leg room though.

Flight was delayed over 2 hours, then landed at a different airport!

The whole experience from check in to deboarding was fantastic.

Just an evening before they canceled my ticket and offered me ticket costing 3 x times more than. I will not fall prey to these scams,Will never book through kayak now. Such a bad experience.

was okay except.. 1)the porter check in webpage doesn't let you print your boarding pass from home 2)that there was a 90 min cut off for checking in on the kiosk in general, and to print a boarding pass, even tho i checked in online already....

Great! Personable crew. I love that they pour complimentary beer and wine.

I love the 2 seats per row. More room. The crew were excellent.

Check in slow even though completed online check in, there was no bag drop available so had to query for 90mins as only 2 staff on desks.

Flying to a far away destination is a miracle in itself, so please take these with a grain of salt. The seats are a bit tired, and need a freshen up. The entertainment could be a bit newer, especially with all services available now. The food really is where we need help. But again, flying is a privilege, so all is good.

Not so much porter it's your site! Not good

They are a sister company with Air Transat and the two companies do not work well together. If you have any issues the two companies will blame each other and you will miss your flights. The help line does not help

Never book through a third party. Book through Air transats website. Terrible process to get help and many issues happen with them and sister companies because half the flights you book with them aren’t even through air transat.

The plane was pretty full, and we dis not have any includes meal for our 4h30 flight? And on-board entertainment wasn't available, there was no TV or plugging to charger your device on the plane. They told us to download an app if we wanted to watch movies but it never connected, that was a disappointment, the r we st was very good though and the crew were really nice!

Seats were very tight especially for first leg of trip.

Not necessarily a Transat issue but it took 2 hours to go through immigration. Tried to reach out to Transat for resolution but was unable to reach an agent.

The flight was excellent, once it started, however we were delayed two hours when the first plane’s engines wouldn’t start. They found another identical plane and transferred us and our luggage in under two hours and made up almost an hour in the air.

Really low cost trip for the huge amount I paid…o paid 550 dollars just for the trip, one way trip, plus 95 for 1 luggage’s and the second 135 dollars…no blanket, not headphones for entertainment, food was served after 3 hours and 2 hours after, breakfast was served Bad, low cost company for high prices

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

1.It will be better if sandwich is warm. 2.The food is too salty. 3.Breakfast needs some vegetables or fruits.

Boarded plane and then delayed 1.5 hours while on the plane

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

Staff were courteous and helpful. The only negative was the flight delays (which are usually unavoidable) and the high baggage price.

Absolutely terrible, from the customer service to boarding the plane. On the phone, there was some mishaps with getting in my correct date and they did not help me retrieve a refund or any assistance. I’m gonna be reporting to all my followers and family around the region of Los Angeles to New York.

Could not fly out of Canada. Called airlines on Monday, July 14th. Tried to cancel the flight 7 days away, but they said I could not cancel and there would be no refund.

A little disorganized but overall good. The Delta flights were great though

Price was good. Entertainment and food could have been better

Staff was nice, helpful, and did all they could. I understand economy seats are bottom of the barrel, but we're crammed in there with others in our row.

Our flight info was lost as the original booking was with westjet... almost missed our outbound flight trying to get it corrected. Inbound we had to reschedule completely as they didn't have our information and resold our seats ending up getting home much later than planned. The confirmation numbers we received from justfly for westjet didn't help anything with delta as they said we needed a delta confirmation which we never received. I talked with justfly and they said it's the airlines problem and with westjet and they said it is the 3rd party bookers issue.... so, not fun

They kept making changes to the itinerary. I actually wasn't able to go and i tried to get flight credit in exchange for the ticket, but the customer service chat was taking way too much time.

WestJet canceled my booking, replaced it with a booking that didn't work (departing from cruise ship), and didn't offer any flights that did work. Their only option was for me to cancel and go to another airline for more money. Which I did.

Nothing to like because my inbound flight was cancelled without notification by West Jet or third party, JustFly. I couldn’t take the inbound flight due to cancellation; therefore could not take the outbound flight back.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

Mixed experienced. Nice staff. Spacious 787 better than cramped Airbus, though my seat was broken. The bad: Way overpriced ticket and charged for food despite 6 hr flight.

Your crew was so so so wonderful Only thing sound be great if you kept some phone chargers and converters rest 👌👌👌👌

The speakers were way too loud. Music was played during boarding too. This noise could've been avoided.

The TSA people or whatever you call them were a bit rude- I asked why I had to take my shoes off bc I'm 75 and in the USA, I don't have to. The man didn't need to snap at me. It wasn't even busy! The plane was ok, a bit small for such a long flight, but I'm very familiar with the 737 used ( I fly it often between SFO and SAN) service was ok-nothing special. If I drank alcohol I guess I would be happy with free choices. the plane was HOT and even the FA commented on it. They tried to get it cooler, but it never happened.

Multiple change of the gates at Pearson, delayed flight was extremely uncomfortable.

Easy boarding, punctuality, decent service. I can only complain about the measly snack.

Never made this leg of the flight since we rebooked through United instead. Did not make it to immigration/US custom due to the delay. Had to spend the night on our own dime in Toronto

Booked flight was cancelled. Was rebooked but sat in airport for several hours for new departure.

United did not permit online check-in from home as document scans were not getting uploaded. This should be fixed their app

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

Other airlines flying from Montreal to San Francisco

Flights from the other most popular airlines that fly from Montreal to San Francisco according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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