Cheap Flights from Ontario International to Montreal

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Compare Ontario International to Montreal flight deals

Find the cheapest month or even day of the year to fly to Montreal

Book the best Montreal fare with no extra fees

Flight deals Cheapest month Find the best route Route info FAQs Tips and advice

Flight deals from Ontario International to Montreal

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Montreal? If you want to travel next month, return fares start from $913. Find the lowest prices on one-way and return tickets right here.

Montreal.$913 per passenger.Departing Sun, 11 Oct, returning Sun, 18 Oct.Return flight with Frontier Airlines and WestJet.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Sun, 11 Oct, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sun, 18 Oct, arriving in Ontario International.Price includes taxes and charges.From $913, select.

Montreal.$972 per passenger.Departing Fri, 30 Oct, returning Wed, 4 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Fri, 30 Oct, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Wed, 4 Nov, arriving in Ontario International.Price includes taxes and charges.From $972, select.

Montreal.$1,035 per passenger.Departing Sat, 19 Sep, returning Sat, 26 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ontario International on Sat, 19 Sep, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Sat, 26 Sep, arriving in Ontario International.Price includes taxes and charges.From $1,035, select.

Montreal.$1,042 per passenger.Departing Tue, 12 Jan, returning Tue, 19 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Tue, 12 Jan, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Tue, 19 Jan, arriving in Ontario International.Price includes taxes and charges.From $1,042, select.

Montreal.$1,044 per passenger.Departing Tue, 22 Sep, returning Tue, 20 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ontario International on Tue, 22 Sep, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Tue, 20 Oct, arriving in Ontario International.Price includes taxes and charges.From $1,044, select.

Montreal.$1,165 per passenger.Departing Thu, 18 Feb, returning Mon, 22 Feb.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Thu, 18 Feb, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Mon, 22 Feb, arriving in Ontario International.Price includes taxes and charges.From $1,165, select.

Montreal.$1,196 per passenger.Departing Tue, 29 Dec, returning Thu, 7 Jan.Return flight with United.Outbound indirect flight with United, departs from Ontario International on Tue, 29 Dec, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with United, departs from Montreal Pierre Elliott Trudeau on Thu, 7 Jan, arriving in Ontario International.Price includes taxes and charges.From $1,196, select.

Montreal.$1,213 per passenger.Departing Thu, 12 Nov, returning Mon, 30 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Thu, 12 Nov, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Mon, 30 Nov, arriving in Ontario International.Price includes taxes and charges.From $1,213, select.

Montreal.$1,320 per passenger.Departing Tue, 1 Dec, returning Sun, 6 Dec.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ontario International on Tue, 1 Dec, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Sun, 6 Dec, arriving in Ontario International.Price includes taxes and charges.From $1,320, select.

Montreal.$1,843 per passenger.Departing Thu, 27 May, returning Mon, 7 Jun.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ontario International on Thu, 27 May, arriving in Montreal Pierre Elliott Trudeau.Inbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Mon, 7 Jun, arriving in Ontario International.Price includes taxes and charges.From $1,843, select.

Find the cheapest month to fly from Ontario International to Montreal

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Montreal flights are currently cheapest in October.

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Alternative Ontario International to Montreal routes

Looking for the cheapest, fastest or easiest route from Ontario International to Montreal? You could fly into the following airports instead.

Ontario to Montreal: Flight information

The things to know before you go.

Cheapest flight found	$913
Cheapest month to fly	October

Finding cheap flights from Ontario International to Montreal: Frequently asked questions

How many airports are there in Montreal?

There are 3 airports in Montreal: Montreal St Hubert, Montreal Pierre Elliott Trudeau and Montreal Mirabel.

How much are return flights from Ontario International to Montreal?

The best price we found for a return flight from Ontario International to Montreal is $913. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Ontario International to Montreal?

Currently, there are no airlines that fly direct from Ontario International to Montreal. But we found flights with one or more stops from $913.

How many flights are there a week from Ontario International to Montreal?

As of September 2026, there are no flights flying from Ontario International to Montreal.

When is the cheapest time to fly from Ontario International to Montreal?

The cheapest month to fly from Ontario International to Montreal is usually October.

Which is the cheapest airport to fly into in Montreal?

If you're flying from Ontario International Airport, the cheapest airport near Montreal is Montreal Pierre Elliott Trudeau – which is 16.1 km away from the centre of Montreal. We've found flights into this airport from $913.

Which upcoming date is cheapest to fly from Ontario International Airport to Montreal on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Montreal on Sunday, 11 October 2026.

Can I get a direct flight from Ontario International Airport to Montreal?

No airlines currently offer direct flights between Ontario International Airport and Montreal. Most routes have one or more stops.

How can I get the best flight deal from Ontario International Airport to Montreal?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Montreal but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Montreal?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Montreal is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Montreal?

In September, the average temperature is usually around 17°C. July is typically the warmest month in Montreal, when it usually averages around 27°C. You can expect the least rain in September. The coldest month is January, with temperatures averaging -11°C. The rainiest month is June.

Which is the cheapest airline to fly from Ontario International Airport to Montreal with?

Currently, Frontier Airlines offers the cheapest flight tickets to Montreal.

Travelling from Ontario International Airport (ONT) to Montreal: what you need to know

Montreal is three hours ahead of Ontario, where Ontario International Airport is located. Montreal runs on the UTC-5 timezone.
For a relaxed start to your ONT to Montreal flight, leave enough time to check in and find your gate. Turning up two hours ahead of international departures and an hour before domestic flights is the standard rule.
You'll likely experience bigger queues in popular months such as July. Arriving up to four hours in advance for an international flight and two hours for domestic departures is a good idea.
Think about adding a stopover to potentially land a cheaper plane ticket from ONT to Montreal. Just uncheck 'Direct flights only' during your search. Take a detour (and maybe pocket some savings) by stopping at one of these popular options:
- Houston George Bush Intercontinental Airport (IAH)
- Phoenix Sky Harbour International Airport (PHX)
- Las Vegas Harry Reid International Airport (LAS)
Located around 5 kilometres from central Ontario, ONT can be reached in about 15 minutes by car, depending on traffic. The journey on public transport takes roughly 45 minutes.
Searching for a hotel close to ONT? If you're catching an early flight from Ontario International Airport to Montreal, these accommodation options will get you from your pillow to the plane in no time:
Ontario International Airport maintains a strong on-time performance, so flight disruptions are less likely. Departures from ONT make it to their destination as scheduled 83% of the time.
You'll find ONT at 2900 E. Airport Drive.

How to find the cheapest flights from Ontario International Airport (ONT) to Montreal

The best price we've found for a one-way Ontario International Airport to Montreal flight is $434. The cheapest price for a return flight is $913. Bear in mind fares can change due to demand at the time of booking.
Booking ahead of time is often the key to scoring a cheap flight from ONT to Montreal. Flight prices rise as demand increases, so the closer you get to departure, the more it could cost you.
Finding cheap tickets from Ontario International Airport to Montreal is easier if you can be flexible with your travel plans. Use the 'Whole month' tool to get the lowest prices across the month and bag a sweet deal.
Locking in a cheap flight from ONT to Montreal is a breeze with Price Alerts. All you need to do is set up one of these automatic notifications and we'll notify you when the price has dropped.
Save on your flight from Ontario International Airport to Montreal with the help of our filters. Select your preferred times, airlines and number of stops, then sort the results by 'Cheapest' to see the best deals.

Airports in Montreal

Montreal-Trudeau International Airport (YUL)

Montreal-Trudeau International Airport (YUL) to the centre of Montreal takes around 25 minutes by car. The centre is roughly 19 kilometres away.
It'll take around 45 minutes when travelling by public transport.
The last thing you want is a lengthy journey to your hotel if you're getting in late on a flight from Ontario International Airport to Montreal. Check in to one of these accommodation options near YUL instead:
Get the best deal by booking your ride from Montreal-Trudeau International Airport around four weeks ahead of your flight from ONT to Montreal.
The address for YUL is 975 Romeo Vachon Street North.

Montreal Metropolitan Airport (YHU)

Central Montreal is about 23 kilometres from Montreal Metropolitan Airport (YHU). After your flight from Ontario International Airport to Montreal has touched down and you've made your way through the terminal, the drive should be around 25 minutes.
The journey will take roughly 1 hour on public transport.
You'll find some comfortable places ready to welcome you near YHU. Unwind and get cosy after your ONT to Montreal flight at any of these well-located options:
Get your preferred vehicle, not just what's left over, by reserving your ride from YHU before your arrival. You'll also avoid last-minute price hikes, especially when demand is high.

Best time to go to Montreal

July is the busiest month for flights from Ontario International Airport to Montreal. To steer clear of the crowds, head to Montreal in January.
Book a Ontario International Airport to Montreal plane ticket with a departure in July to visit the city during its warmest month. Expect temperatures to range from 14ºC to 28ºC.
If you want cooler conditions, look for a cheap ticket from ONT to Montreal in January when temperatures average between -19ºC and -2ºC.

More about Montreal

When it comes to looking for somewhere to rest your head, you'll find the top stays in Montreal right here. Browse these hotels once you've locked in your flight from Ontario International Airport to Montreal:
Every great journey has to include a little sightseeing. Montreal Botanical Garden, Cirque du Soleil - KURIOS and Saint Joseph's Oratory of Mount Royal are attractions you won't want to skip in Montreal.

Explore more of Canada

Toronto is just one of the many cities in Canada waiting to be explored after you've seen Montreal. Around 499 kilometres away to the southwest, top sights here include CN Tower, The Top CN Tower and Royal Ontario Museum.
If you want to check out another major stop in Canada, head for Ottawa, roughly 153 kilometres west of Montreal. Rideau Canal National Historic Site, Parliament Hill and Rideau Canal, Locks 1 - 8 - Ottawa are among its highlights.