Cheap flights from Montreal to San Francisco from $185

If you aren’t able to travel to San Francisco during the month of May, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $397.

The cheapest day to depart from Montreal to San Francisco is on a Friday when prices can be found for as low as $512. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $878.

Our data shows that the cheapest Montreal to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $468. Flights in the afternoon are often more expensive with an average ticket price of $789.

Fly from Montreal Pierre Elliott Trudeau Intl to San Francisco for the best Montreal - San Francisco flight prices

You are more likely to see cheaper flights to San Francisco from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $430 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Montreal for as low as $356 on momondo.

There are 4 cabin classes available to choose from on Montreal to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 6% on your flight if you consider stops on a Montreal to San Francisco flight.

As of March 2026, prices for Montreal to San Francisco flights are approximately 7% more expensive when compared to flights at the same time last year.

Porter Airlines and WestJet are the most popular carriers operating from Montreal to San Francisco

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to San Francisco from Montreal according to our data. Air Canada is the first choice among our users, with 70% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 3 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between Montreal and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, Air Canada have had the least number of delays on this route over the last 12 months; with about 20% of their flights experiencing any sort of delay.

As of March 2026, 4 flights take off from Montreal and land in San Francisco each day. The most common flight departure time for this route is 5:00PM, with 100% of daily flights taking off in the afternoon.

The number of flights available between Montreal and San Francisco is 28 per week as of March 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.