Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco from C$ 251

The cheapest month to fly to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport is in April. Flight prices, which tend to average around C$ 480, are often lower during this time because this is during the off-season. The month of May is another great option to travel to San Francisco, with average flight prices from Montreal Pierre Elliott Trudeau Intl Airport averaging around C$ 501.

The cheapest day to depart from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco is on a Friday. Travellers who choose to depart for San Francisco on a Friday will often find tickets for as low as C$ 1,115. On the other hand, Saturday is the most expensive day to depart from Montreal Pierre Elliott Trudeau Intl Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,254.

Flying to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as C$ 841 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to San Francisco is in the afternoon when prices are around C$ 1,241.

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

You are more likely to see cheaper flights to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around C$ 579 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 Pierre Elliott Trudeau Intl Airport for as low as C$ 486 on momondo.

There are 4 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl 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 34% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to San Francisco flight.

As of February 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to San Francisco flights are approximately 8% cheaper when compared to flights at the same time last year.

Air Canada, Porter Airlines, and WestJet are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to San Francisco

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to San Francisco from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 59% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 5 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 147 minutes.

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

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

According to our data, Air Canada has had the least delays on this route over the last 12 months, with about 19% of their flights experiencing any sort of delay.

Toronto (YYZ) was the most common stop: 93% of momondo users choosing one-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average round-trip price of C$ 408.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 7h 56m.

Toronto (YYZ) has the shortest average layover time for this route: 1h 34m.

As of February 2026, there are 4 flights per day flying from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco. The most common time of day flights depart is 5:00p.m., with 100% of flights taking off in the afternoon.

As of February 2026, there are 28 flights per week flying from Montreal Pierre Elliott Trudeau Intl Airport to San Francisco. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.