YUL - SLU

C$ 836 Find Cheap Flights from Montreal to Castries

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to Castries departing on 27/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Castries

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Castries, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to Castries, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Montreal to Castries (YUL-SLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to Castries that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to Castries

Wed, 15 Oct - Wed, 22 Oct
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6:45 a.m. - 7:00 p.m.YUL-SLU
12h 15m2 stops
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9:10 a.m. - 12:27 a.m.SLU-YUL
15h 17m2 stops
C$ 960
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Sat, 30 Aug - Sat, 6 Sep
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9:20 a.m. - 10:10 p.m.YUL-SLU
12h 50m2 stops
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12:35 p.m. - 12:27 a.m.SLU-YUL
11h 52m2 stops
C$ 1,654
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Thu, 1 Jan - Mon, 12 Jan
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7:00 a.m. - 5:35 p.m.YUL-SLU
9h 35m1 stop
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12:35 p.m. - 12:43 a.m.SLU-YUL
13h 08m2 stops
C$ 1,719
Find Deal
Sat, 30 Aug - Sat, 6 Sep
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9:20 a.m. - 10:10 p.m.YUL-SLU
12h 50m2 stops
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6:20 p.m. - 12:27 a.m.SLU-YUL
30h 07m3 stops
C$ 1,781
Find Deal
Sat, 30 Aug - Sat, 6 Sep
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6:45 a.m. - 7:00 p.m.YUL-SLU
12h 15m2 stops
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12:35 p.m. - 12:27 a.m.SLU-YUL
11h 52m2 stops
C$ 1,792
Find Deal
Thu, 1 Jan - Fri, 9 Jan
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7:00 a.m. - 5:35 p.m.YUL-SLU
9h 35m1 stop
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1:55 p.m. - 12:43 a.m.SLU-YUL
11h 48m2 stops
C$ 1,835
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Sun, 12 Oct - Thu, 16 Oct
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8:00 p.m. - 3:50 p.m.YUL-SLU
19h 50m3 stops
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6:20 p.m. - 10:32 a.m.SLU-YUL
16h 12m2 stops
C$ 1,969
Find Deal
Wed, 15 Oct - Wed, 22 Oct
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8:00 p.m. - 1:10 p.m.YUL-SLU
17h 10m2 stops
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10:15 a.m. - 8:29 a.m.SLU-YUL
22h 14m3 stops
C$ 2,024
Find Deal
Fri, 29 Aug - Sat, 6 Sep
Air Caraïbes Logo
11:00 p.m. - 9:15 p.m.YUL-SLU
46h 15m2 stops
Air Caraïbes Logo
7:30 a.m. - 9:00 p.m.SLU-YUL
37h 30m2 stops
C$ 2,379Air Caraïbes
Find Deal
Fri, 2 Jan - Sat, 10 Jan
Air Caraïbes Logo
10:00 p.m. - 9:15 p.m.YUL-SLU
46h 15m2 stops
Air Caraïbes Logo
7:30 a.m. - 8:00 p.m.SLU-YUL
37h 30m2 stops
C$ 2,408Air Caraïbes
Find Deal
Useful Info

Good to know

Cheapest flightC$ 836
Flight from Montreal to Castries

When to book flights from Montreal to Castries

Are your dates flexible? Find out the best times to travel from Montreal to Castries based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Montreal to Castries flights

  • What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to Castries?

    In the last 3 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to Castries was C$ 605 for a one-way ticket and C$ 695 for a round-trip.

  • Which aircraft models fly most regularly from Montreal to Castries?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Montreal to Castries?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to Castries.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to Castries?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Castries from Montreal is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Montreal to Castries?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Castries with an airline and back to Montreal with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to Castries?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Castries from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Montreal to Castries

 
See real verified KAYAK customer reviews for airlines flying from Montreal to Castries. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Montreal to Castries? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 9992 reviews
7.1Comfort
6.8Entertainment
7.3Boarding
7.8Crew
6.3Food
Airline reviews

They went on strike before time and screwed us big time. Which is not fair. We respect their planned strike but why they went on strike ahead of time ??? Poor garbage management

2.0 MediocreAnonymous, Aug 2025YUL - YYT
Read more Air Canada reviews

They went on strike before time and screwed us big time. Which is not fair. We respect their planned strike but why they went on strike ahead of time ??? Poor garbage management

Premium Economy is best if you can't get upgraded to Business.. Not as good to sleep for red-eye flights, but does the job. More space for your legs and arms.. The food is also better and the service is almost like business.

Awful. As we were boarding we were told the flight was cancelled. Then had to stand in a queue for 3 hours to talk to someone at the kiosk of Air Canada. They were not helpful at all. No empathy. My issue is not with them striking but the total disregard for the chaos and distress late notice caused. No thought on the impact this has caused.

Horrible, experience, 5 hours delay, they changed gates 3 times, the last one we had to wait for 1::30 hre for the door to open to get to that gate. 0 apologies from Air Canada, they don’t care at all about their passengers

I had a very disappointing experience with customer service. I was suffering from a severe viral infection that included a rash and persistent cough, leaving me unable to even sit upright. Given the circumstances, I requested travel credits from Canada Air, explaining the potential health risk to others onboard. However, the airline showed no concern for my condition and stated they were not in a position to make decisions based on health considerations. Despite my illness, I received no support or flexibility. Ultimately, I chose to forgo my flight due to their lack of responsiveness. It’s unfortunate that airlines like this operate without prioritizing passenger health and safety.

On-time boarding, departure, and flight. Electronic notifications about bags for the whole of their own journey too - from when they got accepted into the system through to being loaded onto the plane and then finally being disgorged onto the right carousel. That was an excellent feature.

When I came in the front door in Montreal airport I didn't know where to go, first time traveling. Signs were not directing me.

Aircanada was not great. Didn't get anything to eat. No snacks. No entertainment. Horrible checking in.

My return flight experience was one of the worst times I have had traveling anywhere this year. Not because of the flight. It was because there was not enough time allocated to deplane, go through U.S. Customs and U.S. Security to get to the gate for the connecting flight to Boston which I missed, There was well less than an hour between my landing in Montreal from Prince Edward Island to my connecting gate. I even called Air Canada on the morning of my return and noted my concern over the short layover time, not more that 45 minutes. The initial flight was four minutes late. I was seated in the rear of the first aircraft, and it took at least 20 minutes to deplane. The U.S. Customs was a considerable distance from the gate at which we landed. The need for double security seemed unnecessary and redundant. The distance from the security to my gate was again fairly great, and the wrong gate number was listed on my boarding pass. The agent I approached at the flight that was going to Newark, New Jersey was too busy to answer my question as to what gate was for Boston. When I got to the right gate, they had just closed the door to the aircraft even though I arrived a minute late. If I knew the distance to Customs and from Security to the gate, I would have asked for a seat on the next available flight which was 4:30 pm. When I made my call at 6:00AM that morning. When I asked the agent at the Boston gate, he said that the 4:30 flight was already “OVERBOOKED!” I was put on an 8:30 PM flight and didn’t get home until MIDNIGHT. I then had to care for a barnful of hungry animals and didn’t get to bed until 2:00 AM.

From Montreal to Cincinnati the flight was perfect! Flight free and everyone was perfect and a pleasure to travel with. But from Casablanca to Montreal the flight crew were quite cold, unhelpful, also seemed to scold many passengers instead of simply educating or instructing them. There were a couple for sure I could describe but not name… i was really shocked bc my experience w air Canada is typically a good one at the very least. It seemed something was very much so I’m the air w the crew. The two older lady crew members and the male were amazing but the younger lady crew members w the exception of one were very clique-y and snarky, sassy

Everything you need to know for your flight from Montreal to Castries

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