YUL - SLU

C$ 441 Find Cheap Flights from Montreal to Castries – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Montreal to Castries (YUL-SLU)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Montreal to Castries

Thu, 10 Dec - Mon, 14 Dec
Multiple Airlines Logo
8:15 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
9h 45m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 8:35 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
9h 00m1 stop Bridgetown Grantley Adams Intl
C$ 829Multiple Airlines
Sat, 30 Jan - Sat, 6 Feb
Multiple Airlines Logo
9:20 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
8h 40m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
10h 05m1 stop Bridgetown Grantley Adams Intl
C$ 859Multiple Airlines
Thu, 10 Dec - Mon, 14 Dec
Multiple Airlines Logo
8:15 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
9h 45m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 8:35 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
9h 00m1 stop Bridgetown Grantley Adams Intl
C$ 880Multiple Airlines
Sat, 9 Jan - Sat, 23 Jan
Multiple Airlines Logo
9:20 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
8h 40m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
9:10 a.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
13h 30m1 stop Bridgetown Grantley Adams Intl
C$ 881Multiple Airlines
Sun, 10 Jan - Sun, 24 Jan
Multiple Airlines Logo
9:20 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
8h 40m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
9:10 a.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
13h 30m1 stop Bridgetown Grantley Adams Intl
C$ 881Multiple Airlines
Mon, 8 Feb - Thu, 18 Feb
Multiple Airlines Logo
9:20 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
8h 40m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
10h 05m1 stop Bridgetown Grantley Adams Intl
C$ 885Multiple Airlines
Tue, 20 Oct - Sat, 24 Oct
Multiple Airlines Logo
7:00 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
12h 00m2 stops Toronto Pearson Intl Bridgetown Grantley Adams Intl
Multiple Airlines Logo
3:45 p.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
29h 55m1 stop Bridgetown Grantley Adams Intl
C$ 885Multiple Airlines
Wed, 6 Jan - Wed, 13 Jan
Multiple Airlines Logo
9:20 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
8h 40m1 stop Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
10h 05m1 stop Bridgetown Grantley Adams Intl
C$ 890Multiple Airlines
Fri, 25 Sep - Thu, 5 Nov
Multiple Airlines Logo
5:00 a.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
14h 00m2 stops Toronto Pearson Intl Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 12:25 a.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
12h 50m2 stops Bridgetown Grantley Adams Intl Toronto Pearson Intl
C$ 895Multiple Airlines
Mon, 8 Feb - Thu, 18 Feb
Multiple Airlines Logo
9:20 p.m. - 7:00 p.m.YUL  Montreal Pierre Elliott Trudeau Intl-SLU Castries George F. L. Charle
20h 40m2 stops Toronto Pearson Intl Bridgetown Grantley Adams Intl
Multiple Airlines Logo
12:35 p.m. - 9:40 p.m.SLU  Castries George F. L. Charle-YUL Montreal Pierre Elliott Trudeau Intl
10h 05m1 stop Bridgetown Grantley Adams Intl
C$ 899Multiple Airlines
Booking Insights

Price, demand, and travel trends for Montreal Pierre Elliott Trudeau Intl Airport to Castries flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries with more confidence.

What is the cheapest layover airport when flying from Montreal Pierre Elliott Trudeau Intl Airport to Castries?

Flights via Bridgetown Grantley Adams Intl (BGI) offer the most affordable fares, with an average round-trip price of C$ 1,100. Based on KAYAK data over the past 3 months.

When flying from Montreal Pierre Elliott Trudeau Intl Airport to Castries, which airport offers the shortest layover?

Bridgetown Grantley Adams Intl (BGI) had the shortest average connection time for Montreal Pierre Elliott Trudeau Intl Airport to Castries layovers at 377 minutes over the past 3 months.

Find deals

Key details for Montreal Pierre Elliott Trudeau Intl Airport to Castries flights

Cheapest flight

C$ 423
Flights from Montreal Pierre Elliott Trudeau Intl Airport 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

Your Montreal Pierre Elliott Trudeau Intl Airport to Castries flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Montreal Pierre Elliott Trudeau Intl Airport to Castries?

    Flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries usually depart from Montreal Pierre Elliott Trudeau Intl (YUL) and arrive at Castries George F. L. Charle (SLU).

  • Which cabin classes can I book on flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries?

    Only Economy Class is available on flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries.

  • Which airports do connecting flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries pass through?

    Most connecting flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries pass through Bridgetown Grantley Adams Intl (BGI), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

  • Can I save money by using flexible dates for flights from Montreal Pierre Elliott Trudeau Intl Airport to Castries?

    Yes. Being flexible with your travel dates can save you up to 50% on the Montreal Pierre Elliott Trudeau Intl Airport to Castries route. Thursday is the cheapest departure day at C$ 1,099 round-trip on average, while Monday is the most expensive at C$ 2,161, a difference of C$ 1,062. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Do I need a passport to fly from Montreal Pierre Elliott Trudeau Intl Airport to Castries?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Montreal Pierre Elliott Trudeau Intl Airport to Castries changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 829 to C$ 5,608. That means the highest observed fare was about 7x higher than the lowest one.

  • How are flight prices from Montreal Pierre Elliott Trudeau Intl Airport to Castries looking right now?

    One-way fares from Montreal Pierre Elliott Trudeau Intl Airport to Castries are currently lower than usual. Average one-way flight prices are about C$ 551, which is 16% below the typical average for this route.

  • What car rental options are available at Castries George F. L. Charle Airport (SLU)?

    Castries George F. L. Charle Airport (SLU) hosts 5 major car rental companies, with daily rates starting from around C$ 19 for economy cars. Top options include:
    · Ace
    · Drive A Matic
    · Final Rentals
    · Sixt
    · Hertz

Your guide to booking Montreal Pierre Elliott Trudeau Intl Airport to Castries flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure instead of Monday. On this route, Thursday flights average C$ 1,099 – about C$ 1,062 less than Monday (49% savings) based on the last 12 months.
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Castries George F. L. Charle Airport.
    - Stolen Time St. Lucia
    - Sandals Halcyon Beach Couples Only
    - Sandals Regency La Toc

More options for your flight from Montreal to Castries

Complete your trip to Castries with a hotel stay or car rental

Car rentals in Castries
Hotels in Castries