Best time to go: what is the RIGHT price for a round-trip flight to Saint Lucia (Castries) (from: Montreal)

The average price to go to Saint Lucia (Castries) from Montreal airport is $ 708 (round trip). However, there are variations depending on the departure month. Thus, it is possible to pay for your plane ticket on average between $ 619 (in february) and $ 873 (in july), which is a saving of $ 89 or a surplus of $ 165 (compared to the average price) depending on the period you leave.

The analysis of all prices reveals that the most frequent price is between $569 to $620 and it is generally more economical to leave on a wednesday and return on a wednesday on a flight with 1 or more layovers.

Be careful, the cheapest months may correspond to unfavorable weather periods . Check out our page best time to go to Saint Lucia (Castries) before booking your flight.

If you want to know when to book your flight at the best price, go straight to the second part of this page: When to buy your Montreal-Saint Lucia (Castries) plane ticket.

How are these data calculated?

We have studied a sample of 50024 airfare prices from previous years for flights to Saint Lucia (Castries) from Montreal and can thus establish precise and credible price variation trends based on different parameters. Of course, prices can vary from year to year, but the seasonal aspect of this data (recurrence of school holidays, events... from year to year) makes these statistics quite reliable.

Average price depending on the departure month

Data analysis:

By leaving in february, the price of the plane ticket will statistically be the cheapest ($ 619, saving $ 89 compared to the average price over the year which is $ 708). Conversely, july will be the most expensive ($ 873).

Flight Montreal-Saint Lucia (Castries): when is the best time to go for the best price?

Month Good price* Average price Our opinion
January$ 510 $ 625 good price
February$ 509 $ 619 very good price
March$ 564 $ 707 fair price
April$ 555 $ 672 fair price
May$ 611 $ 735 fair price
June$ 563 $ 709 fair price
July$ 731 $ 873 very high price
August$ 588 $ 729 fair price
September$ 524 $ 702 fair price
October$ 582 $ 766 fair price
November$ 526 $ 622 good price
December$ 566 $ 727 fair price

*great price to buy your plane ticket: if you see this price or cheaper during your flight search, go for it and buy it!

Price breakdown to travel from Montreal to Saint Lucia (Castries)

Data analysis:

The prices for flights from Montreal to Saint Lucia (Castries) range from $362 to $1189. 3% of tickets were purchased at the minimum price (from $362 to $414), 1% at the maximum price (from $1137 to $1189). The majority of plane tickets were purchased in the range of $569 to $620 (13% of tickets).

Cheapest airlines for the Montreal->Saint Lucia flight

There are 8 companies that serve Montreal from Saint Lucia (Castries) airport: Air Canada, American Airlines, WestJet, Delta, Iberia, KLM, United and Porter Airlines.

Data analysis:

Of the 50024 flights analyzed in previous years, Air Canada was the airline that offered the best fare most often in the flight ticket search results (35% of the time) on the Montreal->Saint Lucia route.

Which day of the week to leave?

Data analysis:

Statistically, Montreal-Saint Lucia (Castries) flights departing on a wednesday are cheaper than on other days of the week. By choosing a wednesday as your departure date, you can save an average of $49. On the other hand, departing on a saturday may cost you an additional $80.

Which day of the week to come back?

Data analysis:

Statistically, return flights from Saint Lucia (Castries) to Montreal departing on a wednesday are cheaper than on other days of the week. By choosing a wednesday for your return date, you will save an average of $64. Conversely, departing from Saint Lucia (Castries) on a saturday may cost you an additional $95.


Top prices Montreal-Saint Lucia (Castries)

Round tripDatesPrice
Montreal → Castries11-02 to 18-02-2025$ 336 
Montreal → Castries12-02 to 19-02-2025$ 345 
Montreal → Castries20-02 to 27-02-2025$ 376 
Montreal → Castries04-03 to 11-03-2025$ 433 
Montreal → Castries05-03 to 12-03-2025$ 379 
Montreal → Castries09-03 to 13-03-2025$ 406 
Montreal → Castries11-03 to 18-03-2025$ 390 
Montreal → Castries12-03 to 17-03-2025$ 391 
Montreal → Castries02-04 to 09-04-2025$ 448 
Montreal → Castries13-06 to 20-06-2025$ 439 


When to book your flight Montreal - Saint Lucia (Castries) to get the cheapest price?

Statistically, you will make the biggest savings by buying your plane ticket between 6 to 7 months in advance. However, you may end up paying a high price if you book between 0 to 1 month in advance.

Did you know: the price of plane tickets not only varies depending on how far in advance you book, but also on the day of the week you book! So, to maximize your chances of getting the best price for a Montreal-Saint Lucia flight, it is recommended to book your ticket on a saturday.

How far in advance should I buy my flight?

Data analysis:

To get the cheapest flight ticket from Montreal to Saint Lucia (Castries), it is recommended to buy it 6 to 7 months before departure (it is then on average 680 $, which is a saving of 28 $ compared to the overall average price). On the other hand, if you buy your ticket 0 to 1 month in advance, you will pay the full price (40 $ more than the average price).

Depending on the departure month

The best time to buy your Montreal to Saint Lucia (Castries) flight ticket may vary depending on your departure month. Therefore, we offer you statistics on when to book your flight month by month.

Departure on... How far in advance should I book?
January

Best time: 8 to 9 months before departure (average price: 553 $)

Other interesting period(s): 4 to 5 months ($ 615), 5 to 6 months ($ 572), 6 to 7 months ($ 569), 7 to 8 months ($ 571), 9 to 10 months ($ 559)

February

Best time: 8 to 9 months before departure (average price: 545 $)

Other interesting period(s): 3 to 4 months ($ 618), 4 to 5 months ($ 574), 5 to 6 months ($ 553), 6 to 7 months ($ 578), 7 to 8 months ($ 581), 9 to 10 months ($ 558)

March

Best time: 8 to 9 months before departure (average price: 615 $)

Other interesting period(s): 3 to 4 months ($ 698), 4 to 5 months ($ 690), 5 to 6 months ($ 643), 6 to 7 months ($ 628), 7 to 8 months ($ 621), 9 to 10 months ($ 631), 10 to 11 months ($ 617), 11 to 12 months ($ 688)

April

Best time: 9 to 10 months before departure (average price: 613 $)

Other interesting period(s): 0 to 1 month ($ 633), 5 to 6 months ($ 652), 6 to 7 months ($ 631), 7 to 8 months ($ 632), 8 to 9 months ($ 652), 10 to 11 months ($ 646)

May

Best time: 7 to 8 months before departure (average price: 660 $)

Other interesting period(s): 1 to 2 months ($ 681), 2 to 3 months ($ 732), 3 to 4 months ($ 723), 6 to 7 months ($ 676), 8 to 9 months ($ 670), 9 to 10 months ($ 704), 11 to 12 months ($ 672)

June

Best time: 10 to 11 months before departure (average price: 570 $)

Other interesting period(s): 0 to 1 month ($ 704), 2 to 3 months ($ 663), 6 to 7 months ($ 648), 7 to 8 months ($ 648), 8 to 9 months ($ 619), 9 to 10 months ($ 592)

July

Best time: 11 to 12 months before departure (average price: 672 $)

Other interesting period(s): 1 to 2 months ($ 825), 2 to 3 months ($ 850), 3 to 4 months ($ 832), 8 to 9 months ($ 808), 9 to 10 months ($ 755), 10 to 11 months ($ 776)

August

Best time: 3 to 4 months before departure (average price: 587 $)

Other interesting period(s): 1 to 2 months ($ 683), 4 to 5 months ($ 694), 5 to 6 months ($ 714), 9 to 10 months ($ 652), 10 to 11 months ($ 665)

September

Best time: 2 to 3 months before departure (average price: 585 $)

Other interesting period(s): 1 to 2 months ($ 592), 3 to 4 months ($ 636), 4 to 5 months ($ 649), 5 to 6 months ($ 661), 6 to 7 months ($ 698), 7 to 8 months ($ 695), 11 to 12 months ($ 696)

October

Best time: 2 to 3 months before departure (average price: 646 $)

Other interesting period(s): 0 to 1 month ($ 746), 1 to 2 months ($ 690), 5 to 6 months ($ 734), 6 to 7 months ($ 741), 7 to 8 months ($ 752)

November

Best time: 3 to 4 months before departure (average price: 534 $)

Other interesting period(s): 1 to 2 months ($ 614), 2 to 3 months ($ 565), 4 to 5 months ($ 553), 5 to 6 months ($ 602)

December

Best time: 6 to 7 months before departure (average price: 630 $)

Other interesting period(s): 4 to 5 months ($ 669), 5 to 6 months ($ 645), 8 to 9 months ($ 630), 9 to 10 months ($ 651), 10 to 11 months ($ 692)

What day of the week should I book my flight ticket?

Data analysis:

Statistically, saturday is the day when plane tickets for Montreal->Saint Lucia are the cheapest. So, by buying your plane ticket on a saturday, you will save $6. Conversely, by buying it on a wednesday, you may end up paying $6 more.



Montreal to Saint Lucia (Castries): flight price when booking today

Information: this data is not statistics but comes from real prices collected less than 7 days ago. Some months may not be available as we do not have enough data for them.

Month Current price
February 2025$ 725
$310 to $2217
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March 2025$ 608
$377 to $1887
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April 2025$ 548
$431 to $825
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May 2025$ 694
$455 to $1227
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June 2025$ 628
$439 to $1512
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July 2025$ 765
$474 to $1253
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August 2025$ 603
$474 to $1203
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September 2025$ 647
$531 to $3503
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October 2025$ 652
$531 to $1225
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November 2025$ 884
$707 to $1310
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December 2025$ 903
$722 to $2643
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January 2026$ 852
$738 to $2585
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Data analysis:

Compared to the average price, march, april, may, june, july, august, september and october are cheaper to travel to Saint Lucia (Castries). So it may be interesting to book now to leave during these months!



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