Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Ireland from C$ 342

The cheapest month to fly to Ireland from Montreal Pierre Elliott Trudeau Intl Airport is in May. Flight prices, which tend to average around C$ 706, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of May, then book flights to Ireland from Montreal Pierre Elliott Trudeau Intl Airport during September instead. Flights to Ireland in September, while not as cheap as those in May, still average around C$ 714.

The cheapest day to depart from Montreal Pierre Elliott Trudeau Intl Airport to Ireland is on a Saturday when prices can be found for as low as C$ 899. The most expensive day to fly to Ireland is Wednesday, with ticket prices averaging around C$ 1,031.

Fly from Montreal Pierre Elliott Trudeau Intl to Dublin for the best Montreal Pierre Elliott Trudeau Intl - Ireland flight prices

You are more likely to see cheaper flights to Ireland from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around C$ 918 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from Montreal Pierre Elliott Trudeau Intl Airport for as low as C$ 769 on momondo.

There are 3 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl Airport to Ireland 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 14% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to Ireland flight.

WestJet and Aer Lingus are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to Ireland

Air Canada, WestJet and Air Transat are the top three most popular airlines that fly to Ireland from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 42% of people opting to fly with this airline when travelling to Ireland. Keep in mind that there are 8 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between Montreal and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 129 minutes.

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

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday 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 15% of their flights experiencing any sort of delay.

As of September 2026, 1 flights take off from Montreal Pierre Elliott Trudeau Intl Airport and land in Ireland each day. The most common flight departure time for this route is 8:00p.m., with 100% of daily flights taking off in the evening.

As of September 2026, there are 11 flights per week flying from Montreal Pierre Elliott Trudeau Intl Airport to Ireland. The most common day of the week flights depart is Mon, with 27% of flights taking off on this day.