Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to San Diego from C$ 280

In general, September is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to San Diego. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 535. If you are unable to visit San Diego during the month of September, then departing from Montreal Pierre Elliott Trudeau Intl Airport during the month May is also very affordable. Most momondo users find prices during this month for around C$ 577.

The cheapest day to depart on your flight to San Diego is on a Monday when prices can be found for as low as C$ 551. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to San Diego on Tuesday is C$ 685.

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

You are more likely to see cheaper flights to San Diego 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 Diego for around C$ 635 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Montreal Pierre Elliott Trudeau Intl Airport for as low as C$ 479 on momondo.

There are 2 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl Airport to San Diego 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 20% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to San Diego flight.

Air Canada and WestJet are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to San Diego

Air Canada, Delta and United Airlines are the top three most popular airlines that fly to San Diego from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 54% of people opting to fly with this airline when travelling to San Diego. Keep in mind that there are 4 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

San Francisco (SFO) was the most common stop: 63% 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$ 554.

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 8h 45m.

San Francisco (SFO) has the shortest average layover time for this route: 1h 27m.

As of August 2026, there are 1 flights per day flying from Montreal Pierre Elliott Trudeau Intl Airport to San Diego. The most common time of day flights depart is 5:00p.m., with 85% of flights taking off in the afternoon.

As of August 2026, there are 12 flights per week flying from Montreal Pierre Elliott Trudeau Intl Airport to San Diego. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.