Cheap flights from Montreal to San José from C$ 258

In general, October is the cheapest month to fly from Montreal to San José. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 188. If you aren’t able to travel during the month of October, then book flights to San José from Montreal during May instead. Flights to San José in May, while not as cheap as those in October, still average around C$ 235.

The cheapest day to depart from Montreal to San José is on a Tuesday. Travellers who choose to depart for San José on a Tuesday will often find tickets for as low as C$ 569. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around C$ 765. These prices are subject to change though, so be sure to set up a Price Alert for flights to San José.

Fly from Montreal Pierre Elliott Trudeau Intl to San José Juan Santamaria Intl for the best Montreal - San José Juan Santamaria Intl flight prices

You are more likely to see cheaper flights to San José from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to San José for around C$ 665 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San José from Montreal for as low as C$ 609 on momondo.

As of May 2026, prices for Montreal to San José flights are approximately 5% more expensive when compared to flights at the same time last year.

Air Transat, United Airlines, and Copa Airlines are the most popular carriers operating from Montreal to San José Juan Santamaria Intl

Air Transat, Air Canada and Avianca are the top three most popular airlines that fly to San José from Montreal according to our data. Air Transat is the first choice among our users, with 34% of people opting to fly with this airline when travelling to San José. Keep in mind that there are 7 different airlines that fly to San José on a routine basis, so you have a few additional options to choose from.

Historically, on average around 25% of flights between Montreal and San José have experienced a delay on any given week. The average delay length over the past 12 months has been 139 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.

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

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

Bogotá (BOG) was the most common stop: 38% of momondo users choosing one-stop flights on this route connected there.

Flights via Bogotá (BOG) offer the lowest average round-trip price of C$ 504.

Flights connecting via Charlotte (CLT) have the shortest average one-way travel time: 7h 26m.

San Salvador (SAL) has the shortest average layover time for this route: 1h 54m.