Cheap flights from Montreal to San Diego from $173

If you are unable to visit San Diego during the month of June, then departing from Montreal during the month May is also very affordable. Most momondo users find prices during this month for around $334.

The cheapest day to depart from Montreal to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $256. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $481. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

The cheapest time of day to fly to San Diego is in the afternoon when flights can be purchased for as low as $308. Flights in the evening are often more expensive with an average ticket price of $550.

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

You are more likely to see cheaper flights to San Diego from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $374 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 for as low as $310 on momondo.

There are 2 cabin classes available to choose from on Montreal 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 4% on your flight if you consider stops on a Montreal to San Diego flight.

As of February 2026, prices for Montreal to San Diego flights are approximately 14% more expensive when compared to flights at the same time last year.

American Airlines is the most popular carrier operating from Montreal to San Diego

Air Canada, Delta and United Airlines are the top three most popular airlines that fly to San Diego from Montreal according to our data. Air Canada is the first choice among our users, with 51% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 5 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 30% of momondo users choosing 1-stop flights on this route connected there.

Flights via Charlotte (CLT) offer the lowest average round-trip price of $271.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 8h 09m.

Charlotte (CLT) has the shortest average layover time for this route: 0h 58m.