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Cheap Flights from Montreal (YUL) to Castries (SLUA)

Compare Montreal Pierre Elliott Trudeau to Castries flight deals

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

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Flight deals from Montreal Pierre Elliott Trudeau to Castries

Looking for a cheap last-minute deal or the best return flight from Montreal Pierre Elliott Trudeau Airport to Castries? If you want to travel next month, return fares start from $509. Find the lowest prices on one-way and return tickets right here.
Castries.$509 per passenger.Departing Wed, 3 Jun, returning Sun, 14 Jun.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Wed, 3 Jun, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 14 Jun, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $509, select.
Castries.$532 per passenger.Departing Sat, 30 May, returning Thu, 11 Jun.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sat, 30 May, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Thu, 11 Jun, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $532, select.
Castries.$541 per passenger.Departing Wed, 26 Aug, returning Sun, 20 Sep.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Wed, 26 Aug, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 20 Sep, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $541, select.
Castries.$541 per passenger.Departing Wed, 2 Sep, returning Sun, 27 Sep.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Wed, 2 Sep, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 27 Sep, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $541, select.
Castries.$558 per passenger.Departing Sat, 25 Jul, returning Thu, 6 Aug.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sat, 25 Jul, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Thu, 6 Aug, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $558, select.
Castries.$560 per passenger.Departing Sat, 8 Aug, returning Sun, 23 Aug.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sat, 8 Aug, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 23 Aug, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $560, select.
Castries.$574 per passenger.Departing Sat, 26 Sep, returning Sun, 11 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sat, 26 Sep, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 11 Oct, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $574, select.
Castries.$581 per passenger.Departing Sat, 3 Oct, returning Sun, 11 Oct.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sat, 3 Oct, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 11 Oct, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $581, select.
Castries.$663 per passenger.Departing Tue, 7 Jul, returning Tue, 28 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Tue, 7 Jul, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 28 Jul, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $663, select.
Castries.$689 per passenger.Departing Wed, 24 Jun, returning Thu, 2 Jul.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Wed, 24 Jun, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Thu, 2 Jul, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $689, select.
Castries.$714 per passenger.Departing Sat, 23 May, returning Sun, 31 May.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Montreal Pierre Elliott Trudeau on Sat, 23 May, arriving in St Lucia Hewanorra.Inbound indirect flight with WestJet, departs from St Lucia Hewanorra on Sun, 31 May, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $714, select.
Castries.$915 per passenger.Departing Mon, 19 Oct, returning Mon, 2 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Mon, 19 Oct, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Mon, 2 Nov, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $915, select.
Castries.$1,117 per passenger.Departing Tue, 5 Jan, returning Tue, 19 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Tue, 5 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Tue, 19 Jan, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $1,117, select.
Castries.$1,199 per passenger.Departing Wed, 25 Nov, returning Fri, 25 Dec.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Wed, 25 Nov, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 25 Dec, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $1,199, select.
Castries.$1,203 per passenger.Departing Mon, 2 Nov, returning Mon, 9 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Montreal Pierre Elliott Trudeau on Mon, 2 Nov, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Mon, 9 Nov, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $1,203, select.
Castries.$1,207 per passenger.Departing Mon, 1 Mar, returning Mon, 8 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Montreal Pierre Elliott Trudeau on Mon, 1 Mar, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 8 Mar, arriving in Montreal Pierre Elliott Trudeau.Price includes taxes and charges.From $1,207, select.

Find the cheapest month to fly from Montreal Pierre Elliott Trudeau to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Montreal Pierre Elliott Trudeau to Castries flights are currently cheapest in June.
May
from $714
Jun
from $509
Jul
from $663
Aug
from $560
Sep
from $541
Oct
from $581
Nov
from $1,203
Dec
from $1,331
Jan
from $1,117
Feb
from $1,355
Mar
from $1,207
Apr
Find prices

Alternative Montreal Pierre Elliott Trudeau to Castries routes

Looking for the cheapest, fastest or easiest route from Montreal Pierre Elliott Trudeau to Castries? You could fly into the following airports instead.

St Lucia Vigie

1km from central Castries
Closest
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from $509
Search flights

Montreal to Castries: Flight information

The things to know before you go.
Cheapest flight found$509
Cheapest month to flyJune

Finding cheap flights from Montreal Pierre Elliott Trudeau to Castries: Frequently asked questions

There are 2 airports in Castries: St Lucia Vigie and St Lucia Hewanorra.
The best price we found for a return flight from Montreal Pierre Elliott Trudeau to Castries is $509. 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.
Currently, there are no airlines that fly direct from Montreal Pierre Elliott Trudeau to Castries. But we found flights with one or more stops from $509.
As of May 2026, there are no flights flying from Montreal Pierre Elliott Trudeau to Castries.
The cheapest month to fly from Montreal Pierre Elliott Trudeau to Castries is usually June.
If you're flying from Montreal Pierre Elliott Trudeau Airport, the cheapest airport near Castries is St Lucia Hewanorra – which is 30.5 km away from the centre of Castries. We've found flights into this airport from $509.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Montreal Pierre Elliott Trudeau Airport to Castries on Wednesday, 3 June 2026.
No airlines currently offer direct flights between Montreal Pierre Elliott Trudeau Airport and Castries. Most routes have one or more stops.
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 Castries 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.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Castries is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 27°C. September is typically the warmest month in Castries, when it usually averages around 28°C. You can expect the least rain in February. The coldest month is February, with temperatures averaging 25°C. The rainiest month is October.
Currently, WestJet offers the cheapest flight tickets to Castries.

Flying from Montreal-Pierre Elliott Trudeau International Airport (YUL) to Castries: what you need to know

  • Castries's timezone is UTC-4, which is the same as Montreal (the location of Montreal-Pierre Elliott Trudeau International Airport).

  • Give yourself enough time to make your YUL to Castries flight. As a general rule, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as August, it's wise to get to the airport earlier than usual. Plan to arrive two hours before domestic departures and four hours ahead of an international flight whenever you're travelling during peak periods in general.

  • Located around 16 kilometres from the centre of Montreal, YUL can be reached in about 25 minutes by car (depending on traffic). Travelling on public transport takes roughly 45 minutes.

  • Planning to catch an early flight from Montreal-Pierre Elliott Trudeau International Airport to Castries? Avoid the hassle of rushing to the airport (and sneak in some extra snooze time) by choosing one of these stays close to YUL:

  • Of all flights departing from Montreal-Pierre Elliott Trudeau International Airport, 64.89% arrive as scheduled at their destination.

  • YUL's address is 975 Romeo Vachon Street North.

How to find the cheapest flights from Montreal-Pierre Elliott Trudeau International Airport (YUL) to Castries

  • $234 is the lowest price we've found for a one-way Montreal-Pierre Elliott Trudeau International Airport to Castries flight. A round-trip ticket right now is $509. Depending on when and how early you book, these fares could change.

  • To find cheap flights from YUL to Castries, book as early as possible. Airlines generally offer the most competitive fares when tickets are first released.

  • If you're flexible with your travel dates, check out the 'Whole month' search tool. It'll give you the lowest price across each month when looking for your Montreal-Pierre Elliott Trudeau International Airport to Castries ticket.

  • There's no need to keep checking in to find out if fares have dropped when you create a Price Alert. We'll notify you as soon as there's an even bigger deal on cheap flights from YUL to Castries.

  • Find an affordable flight from Montreal-Pierre Elliott Trudeau International Airport to Castries with the help of our filters. Choose your preferred departure time, duration and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in Castries

George F. L. Charles Airport (SLU)

  • The distance from George F. L. Charles Airport (SLU) to central Castries is roughly 3 kilometres. It'll take you around 5 minutes to reach the centre driving.

  • It typically takes 40 minutes if you're 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 Montreal-Pierre Elliott Trudeau International Airport to Castries. Reserve one of these accommodation options near SLU instead:

  • Get your adventure underway by picking up a George F. L. Charles Airport rental car. Grab your wheels from Drive A Matic, Final Rentals or Sixt and explore beyond Castries's usual tourist stops.

  • For the lowest price, reserve your ride from George F. L. Charles Airport around one week ahead of your flight from YUL to Castries.

Hewanorra Airport (UVF)

  • After your flight from Montreal-Pierre Elliott Trudeau International Airport to Castries has arrived, you can make your way to the city centre in about 1 hour 10 minutes by car. Central Castries is roughly 56 kilometres from Hewanorra Airport (UVF).

  • Place the 'Do not disturb' sign on your door and unwind at a hotel close to UVF. Here are a few options where you can tuck yourself in after your YUL to Castries flight:

  • Forget about inconvenient public transport schedules or slow-moving cab lines. Grab a Hewanorra Airport rental car and let your trip unfold on your terms. Compare offers from Drive A Matic, Sixt and Final Rentals.

  • Get the pick of the lot. Booking your ride from UVF one week ahead of time often means better prices and a wider choice of vehicles.

Best time to go to Castries

  • Before locking in your flights from Montreal-Pierre Elliott Trudeau International Airport to Castries, consider which time of year works best for you. High season in Castries offers a lively atmosphere and plenty of things to do, while the low season brings better deals on hotels and fewer crowds.

  • The warmest month in Castries is September, with temperatures ranging between 26ºC (79ºF) and 30ºC (86ºF). Lock in your Montreal-Pierre Elliott Trudeau International Airport to Castries flight ticket then if that's your definition of good weather.

  • If you like cooler conditions, search for a cheap ticket from YUL to Castries in February when temperatures average between 24ºC (75ºF) and 28ºC (82ºF).

More about Castries

  • When it comes to searching for somewhere to rest your head, you'll find the most popular stays in Castries right here. Browse these hotels once you've locked in your flight from Montreal-Pierre Elliott Trudeau International Airport to Castries:

  • Morne Fortune and Derek Walcott Square are just the start of the popular attractions to add to your Castries to-do list. Keep the adventure rolling by checking out Immaculate Conception Church.

Plan the rest of your trip from Montreal to Castries

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.