YUL - SFO

$218 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 6/8. 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, 0 bags

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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to San Francisco, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$341
Overall average: $410
Air Canada
Sat 1/31Mon 2/9
YUL - SFO • Non-stop
Cheapest non-stop
$402
Typical prices: $366-$596
Lufthansa
Fri 3/6Sun 3/15
YUL - SFO • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United’s Economy Plus offers extra legroom for comfort.
Complete US customs pre-clearance early at YUL.
Expert advice
Expert advice
Expert advice
Expert advice
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 20% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Expert advice
Flight 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

Sat, Jan 31 - Mon, Feb 9
Air Canada Logo
5:50 pm - 9:22 pm
YUL
-
SFO
6h 32mnonstop
Air Canada Logo
11:56 pm - 2:00 pm
SFO
-
YUL
11h 04m
1 stop
$341Air Canada
Wed, Mar 4 - Wed, Mar 11
United Airlines Logo
5:50 pm - 9:22 pm
YUL
-
SFO
6h 32mnonstop
United Airlines Logo
11:20 pm - 12:46 pm
SFO
-
YUL
10h 26m
1 stop
$345United Airlines
Sun, Feb 1 - Sat, Feb 7
United Airlines Logo
8:25 am - 9:17 pm
YUL
-
SFO
15h 52m
1 stop
United Airlines Logo
8:25 am - 4:49 pm
SFO
-
YUL
5h 24mnonstop
$346United Airlines
Thu, Feb 5 - Thu, Mar 12
Porter Airlines Logo
6:45 am - 12:45 pm
YUL
-
SFO
9h 00m
1 stop
Porter Airlines Logo
1:45 pm - 12:35 am
SFO
-
YUL
7h 50m
1 stop
$348Porter Airlines
Tue, Mar 3 - Fri, Mar 27
United Airlines Logo
9:15 am - 5:50 pm
YUL
-
SFO
11h 35m
1 stop
United Airlines Logo
8:52 pm - 4:58 pm
SFO
-
YUL
17h 06m
1 stop
$350United Airlines
Fri, May 15 - Sun, May 24
WestJet Logo
6:45 am - 5:14 pm
YUL
-
SFO
13h 29m
2 stops
WestJet Logo
12:50 pm - 12:42 am
SFO
-
YUL
8h 52m
1 stop
$352WestJet
Wed, Apr 15 - Fri, Apr 17
Multiple Airlines Logo
6:45 am - 12:45 pm
YUL
-
SFO
9h 00m
1 stop
Multiple Airlines Logo
6:45 pm - 4:27 pm
SFO
-
YUL
18h 42m
1 stop
$353Multiple Airlines
Mon, Feb 16 - Thu, Mar 12
Porter Airlines Logo
6:45 am - 12:45 pm
YUL
-
SFO
9h 00m
1 stop
Porter Airlines Logo
1:45 pm - 12:35 am
SFO
-
YUL
7h 50m
1 stop
$355Porter Airlines
Sun, Feb 1 - Sun, Feb 8
United Airlines Logo
8:25 am - 9:17 pm
YUL
-
SFO
15h 52m
1 stop
United Airlines Logo
6:25 am - 4:58 pm
SFO
-
YUL
7h 33m
1 stop
$356United Airlines
Sat, Jan 31 - Wed, Feb 4
Multiple Airlines Logo
6:45 am - 12:43 pm
YUL
-
SFO
8h 58m
1 stop
Multiple Airlines Logo
4:46 pm - 4:29 pm
SFO
-
YUL
20h 43m
2 stops
$358Multiple Airlines
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, Friday 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 Wednesday, with Saturday 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 $337 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $576 and $454 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.

No, with an average price for the route of $474, prices are generally cheapest when you fly direct.

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 3 weeks before departure, which saves you about 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Expert advice

Expert advice for your flight from Montreal to San Francisco

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Air Canada

Air Canada’s Signature Class provides lie-flat seats, ideal for comfort on long-haul flights.


Air Canada offers live TV on some North American flights, enhancing in-flight entertainment.

United Airlines

United’s Economy Plus offers up to six inches more legroom, enhancing comfort on longer flights.


United Polaris Lounge offers a luxurious experience with restaurants and less crowded spaces.

Porter Airlines

PorterReserve offers priority boarding and extra legroom, ideal for comfort on longer flights.


Porter’s newer jets feature wider seats, Wi-Fi, and power sockets, enhancing medium-haul flight comfort.

Airports
YUL

At YUL, complete US customs pre-clearance before departure. Arrive early to allow extra time for this process.

SFO

Use BART for a cost-effective ride from SFO to San Francisco. It's accessible from the International Terminal.

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
John Walton

John Walton

Expert on Porter Airlines

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Brandon Schultz

Brandon Schultz

Expert on YUL

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

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

Good to know

Low seasonNovember
Cheapest flight$218
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 2% lower 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 $218 for a one-way ticket and $341 for a round-trip.

  • Do I need a passport to fly between Montreal and San Francisco?

    A passport is required to fly from Montreal to San Francisco.

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

    Only Air Canada offers 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 nonstop 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 $355 and an overall rating of 7.9, Porter Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $569 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 travelers 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. Booking your flights between Montreal and SFO can sometimes prove cheaper using this method.

  • 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 $378 or less one-way and $453 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 Canada

Tuesday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Friday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

Sunday

Air Canada

Air Canada

See more direct flights

Direct returns

San Francisco to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada

Air Canada

Tuesday

Air Canada

Air Canada

Wednesday

Air Canada

Air Canada

Thursday

Air Canada

Air Canada

Friday

Air Canada

Air Canada

Saturday

Air Canada

Air Canada

Sunday

Air Canada

Air Canada

See more direct flights

Reviews of the top 3 airlines serving 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.
7.9
Porter AirlinesOverall score based on 410 reviews
8.2Boarding
7.9Comfort
8.6Crew
7.0Entertainment
7.6Food
Airline reviews

It was okay. Had a thing with the front desk, she had me repack my suitcases to have them be under the weight restrictions, but then the other one was overweight, she argued with me about it when there were tons of people in line. Wasn’t great.

6.0 GoodJen, Jan 2026
YTZ - BOS
Read more Porter Airlines reviews

It was okay. Had a thing with the front desk, she had me repack my suitcases to have them be under the weight restrictions, but then the other one was overweight, she argued with me about it when there were tons of people in line. Wasn’t great.

Due to a known technical error that Porter has not fixed in over a year, I was unable to check in the children on my reservation online and had to do it at the airport. Upon check in, there were no seats together, which was an issue as we had young children. The gate agent did manage to seat us together by moving other passengers, which was appreciated, but the other passengers were never informed, leading to confusion and delay upon boarding. The flight was over an hour late; no explanation or apology was ever issued. The bags on Porter take a long time to arrive--over half an hour at Hamilton on my inbound flight, and not much better on my return to Edmonton.

Much roomer than air Canada! Great flight for the price. No complaints

On my e-boarding pass it shows free wifi, yet the plane I was on didn’t have wifi. Please remove false advertising from your website and boarding passes

3.5 hr delay for a 1 hr work flight. No information as to why the delay until 20 mins before boarding.

Organization and the adjusted times but the snacks could be of a bigger portion

Smaller plane. Food and bar service for free is amazing. Drinks were in glass not plastic cups.

Poor landing as we overshot the runway and had to re land the plane. Lost both of my luggage not found as of yet. Had to pay extra money for my luggage in USD, now great my luggage is gone. Will not fly with Porter again.

This flight to St. Johns was really good. Boarding was a breeze. We left spot on time. Seats were actually pretty good. Recliner further than I expected. Three more flights to go we will see if this is the status quo for Porter.👍

I was not happy with AirfareAssist, the agency that kayak advised me would be handling my booking. I was advised by porter airlines that I had been overcharged for the Basic express , a option that I had asked airfare assist to help arrange after I realized that the basic fare I had chosen with porter did not include a carryon. At each checkin porter advised I had been overcharged for this . They advised that money would be refunded to my credit card, however, this is not likely to happen as it is not my name and credit card that appeared on the porter invoice, but that of another individual/agent. When airfare assist was arranging the basic express with porter on my behalf, they asked me to confirm that I agreed to pay $263 USD for this. I did agree, as I was advised this was needed to proceed. When I checked the invoice on the porter website and saw that it was not my name and credit card on the invoice, I was advised that this was how airfareassist processed the payment. The Porter invoice indicated a billed amount of $126USD I will not use Kayak or their designated AirfareAssist again

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Both flights delayed. 2nd flight over 3 hours late mechanical issues

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

On the way my flight entertainment wouldn’t work the screen went black and no matter how many times I tried to turn it on it wouldn’t. Food was surprisingly good but the tray tables were tiny so you couldn’t get anything else on the table. The seats hardly go back and are not overly comfortable. Wouldn’t fly United again.

Flight was late - I was downgraded from first class to coach

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

The flight attendants were very rude, beyond comprehension. I took a business class from London to SFO for the first time on United. When I asked for a second piece of bread during dinner, the serving attendant threw a 3rd bread on my plate and said, “here. You can have this one too”! I couldn’t believe the rudeness of the attendant. Most all attendants were very rude, unhelpful, sing the food was absolutely disgusting. Never fly United internationally in business class. My flight back to SFO was a nightmare!!

7 hours delayed due to operational issues on United’s end. Basically laziness.

They are very proactive and made our boarding easy and always notified us about any changes well in advance.

The staff was great and made the long trip easy peasy!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

Great flight. Only complaint is it took over an hour for my luggage to get to the carousel on the return to LAX That was irritating

I liked the behaviour of the crew members.The flight was good.

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.

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

Information on your arrival and departure airports