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Cheap Flights from Philadelphia International to Castries

Compare Philadelphia International 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 Philadelphia International to Castries

Looking for a cheap last-minute deal or the best return flight from Philadelphia International Airport to Castries? If you want to travel next month, return fares start from $1,055. Find the lowest prices on one-way and return tickets right here.
Castries.$912 per passenger.Departing Wed, 4 Nov, returning Mon, 9 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Wed, 4 Nov, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Mon, 9 Nov, arriving in Philadelphia International.Price includes taxes and charges.From $912, select.
Castries.$960 per passenger.Departing Fri, 19 Jun, returning Tue, 23 Jun.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Fri, 19 Jun, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 23 Jun, arriving in Philadelphia International.Price includes taxes and charges.From $960, select.
Castries.$1,006 per passenger.Departing Thu, 7 Jan, returning Wed, 13 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Thu, 7 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Wed, 13 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $1,006, select.
Castries.$1,053 per passenger.Departing Thu, 3 Dec, returning Sun, 6 Dec.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Thu, 3 Dec, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Sun, 6 Dec, arriving in Philadelphia International.Price includes taxes and charges.From $1,053, select.
Castries.$1,055 per passenger.Departing Mon, 6 Jul, returning Tue, 14 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Mon, 6 Jul, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 14 Jul, arriving in Philadelphia International.Price includes taxes and charges.From $1,055, select.
Castries.$1,057 per passenger.Departing Thu, 20 Aug, returning Tue, 25 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Thu, 20 Aug, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 25 Aug, arriving in Philadelphia International.Price includes taxes and charges.From $1,057, select.
Castries.$1,126 per passenger.Departing Tue, 30 Jun, returning Fri, 3 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Tue, 30 Jun, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 3 Jul, arriving in Philadelphia International.Price includes taxes and charges.From $1,126, select.
Castries.$1,247 per passenger.Departing Mon, 1 Feb, returning Mon, 8 Feb.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Mon, 1 Feb, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 8 Feb, arriving in Philadelphia International.Price includes taxes and charges.From $1,247, select.
Castries.$1,247 per passenger.Departing Tue, 6 Oct, returning Mon, 12 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Tue, 6 Oct, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 12 Oct, arriving in Philadelphia International.Price includes taxes and charges.From $1,247, select.
Castries.$1,257 per passenger.Departing Thu, 17 Sep, returning Tue, 22 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Thu, 17 Sep, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Tue, 22 Sep, arriving in Philadelphia International.Price includes taxes and charges.From $1,257, select.
Castries.$1,325 per passenger.Departing Fri, 30 Oct, returning Mon, 2 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Fri, 30 Oct, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 2 Nov, arriving in Philadelphia International.Price includes taxes and charges.From $1,325, select.
Castries.$1,574 per passenger.Departing Sat, 30 Jan, returning Sat, 6 Feb.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Sat, 30 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Sat, 6 Feb, arriving in Philadelphia International.Price includes taxes and charges.From $1,574, select.
Castries.$1,594 per passenger.Departing Fri, 31 Jul, returning Mon, 3 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Fri, 31 Jul, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 3 Aug, arriving in Philadelphia International.Price includes taxes and charges.From $1,594, select.
Castries.$2,238 per passenger.Departing Mon, 31 Aug, returning Tue, 8 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Mon, 31 Aug, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Tue, 8 Sep, arriving in Philadelphia International.Price includes taxes and charges.From $2,238, select.
Castries.$2,522 per passenger.Departing Sat, 13 Mar, returning Sat, 20 Mar.Return flight with United.Outbound indirect flight with United, departs from Philadelphia International on Sat, 13 Mar, arriving in St Lucia Hewanorra.Inbound indirect flight with United, departs from St Lucia Hewanorra on Sat, 20 Mar, arriving in Philadelphia International.Price includes taxes and charges.From $2,522, select.
Castries.$3,427 per passenger.Departing Fri, 4 Dec, returning Sat, 2 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Fri, 4 Dec, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Sat, 2 Jan, arriving in Philadelphia International.Price includes taxes and charges.From $3,427, select.

Find the cheapest month to fly from Philadelphia International to Castries

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Castries flights are currently cheapest in November.
Jun
from $960
Jul
from $1,055
Aug
from $1,057
Sep
from $1,257
Oct
from $1,247
Nov
from $912
Dec
from $1,053
Jan
from $1,006
Feb
from $1,247
Mar
from $2,522
Apr
Find prices
May
Find prices

Direct flights from Philadelphia International to Castries

Alternative Philadelphia International to Castries routes

Looking for the cheapest, fastest or easiest route from Philadelphia International 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 $912
Search flights

Philadelphia to Castries: Flight information

The things to know before you go.
Cheapest flight found$912
Cheapest month to flyNovember
Average flight time4 hrs, 47 mins
Most popular airlineAmerican Airlines
Average flights per week2

Finding cheap flights from Philadelphia International 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 Philadelphia International to Castries is $912. 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.
4 hours and 47 minutes is the average flight time from Philadelphia International to Castries.
American Airlines flies direct from Philadelphia International to Castries.
As of June 2026, there are 2 flights per week flying from Philadelphia International to Castries.
The cheapest month to fly from Philadelphia International to Castries is usually November.
If you're flying from Philadelphia International 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 $912.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Castries on Wednesday, 4 November 2026.
Yes – the average flight time is 4 hours and 47 minutes.
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 June, the average temperature is usually around 28°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, Air Canada offers the cheapest flight tickets to Castries.

Flying from Philadelphia International Airport (PHL) to Castries: what you need to know

  • Expect to be in the air for 5 hours 15 minutes. On average, that's the time it takes for a direct flight from Philadelphia International Airport to Castries.

  • Castries is one hour ahead of Philadelphia, where Philadelphia International Airport is located. Castries runs on the UTC-4 timezone.

  • To avoid missing your PHL to Castries flight, leave plenty of time to navigate the airport and find your gate. Turning up two hours before international departures and an hour before domestic flights is the standard rule.

  • During popular months such as July, it's wise to get to the airport earlier than usual. Arrive two hours before domestic departures and four hours ahead of international flights whenever you're travelling during high season in general.

  • You can book a direct Philadelphia International Airport to Castries ticket. Start your trip at PHL and land at St Lucia Hewnorra International Airport (UVF).

  • American Airlines is a popular airline that operates direct flights from Philadelphia International Airport to Castries.

  • A stopover is the ideal opportunity to take a break from travelling and maybe even explore another city. When searching for plane tickets from PHL to Castries, uncheck the 'Direct flights only' box to see where you can stop along the way. Here are some options to consider:

    • Atlanta Hartsfield-Jackson International Airport (ATL)

    • Newark Liberty International Airport (EWR)

    • Toronto Pearson International Airport (YYZ)

  • PHL is around 11 kilometres from central Philadelphia. If you're driving, catching a taxi or ride-sharing from the centre, it'll take 20 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the trip time to be around 30 minutes.

  • Planning to catch an early flight from Philadelphia International Airport to Castries? Avoid the last-minute rush to the terminal (and sneak in some extra precious sleep) by choosing one of these stays close to PHL:

  • 77% of flights that take off from Philadelphia International Airport make it to their destination on schedule.

  • You'll find PHL at 8500 Essington Ave.

How to find the cheapest flights from Philadelphia International Airport (PHL) to Castries

  • $444 is currently the lowest price for a one-way Philadelphia International Airport to Castries flight. A return plane ticket starts at $912. These prices can change based on availability.

  • To score cheap flights from PHL to Castries, book your trip one month before your departure date.

  • June is the best month for landing a fantastic deal on Philadelphia International Airport to Castries tickets. If you need to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • There's no need to check every day to see if fares have dropped when you create a Price Alert. We'll let you know the moment there's an even better deal on cheap flights from PHL to Castries.

  • Pick your preferred arrival and departure times, airlines and number of stops with our filters. Then, sort the results for your flight from Philadelphia International Airport to Castries by 'Best,' 'Fastest' or 'Cheapest.'

Airports in Castries

St Lucia Hewnorra International Airport (UVF)

  • St Lucia Hewnorra International Airport (UVF) is around 72 kilometres from central Castries. If you're grabbing a taxi or a ride-share, the drive takes about 1 hour 30 minutes.

  • If you're using public transport, expect a journey time of about 2 hours.

  • Consider booking a hotel near UVF if you have a late flight from Philadelphia International Airport to Castries. Check in to one of these options and make your arrival easier:

  • Booking your vehicle from St Lucia Hewnorra International Airport around one week in advance of your flight from PHL to Castries can help you get the lowest rate.

Castries George F. L. Charles Airport (SLU)

  • The centre of Castries is located around 3 kilometres from Castries George F. L. Charles Airport (SLU). After your flight from Philadelphia International Airport to Castries has landed and you've navigated your way to arrivals, the drive should take about 10 minutes.

  • If you travel by public transport, you'll reach the centre in 15 minutes or so.

  • You'll find some comfortable places to call home for the night near SLU. Tuck yourself in and get cosy after your PHL to Castries flight at any of these well-located options:

  • Avoid paying more than you need to. Securing your ride one week before your arrival at SLU can land you a better rate.

Best time to go to Castries

  • September is the quietest month for flights from Philadelphia International Airport to Castries, while February is the most popular. Choose the best time to go to Castries based on whether you like a bustling atmosphere or a more laid-back vibe.

  • When booking your Philadelphia International Airport to Castries plane ticket, think about what kind of weather you prefer. September is the warmest month in Castries, with temperatures ranging from 26ºC to 30ºC.

  • Search for cheap tickets from PHL to Castries in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 24ºC and 28ºC on average.

More about Castries

  • Start your Castries trip right by choosing the perfect place to stay. Once you've booked your flight from Philadelphia International Airport to Castries, check out our selection of hotels including:

  • Every great adventure has to include some sightseeing. Malabar Beach, Vigie Beach and Morne Fortune are must-do's during your Castries adventure.

More travel options

Plan the rest of your trip from Philadelphia to Castries

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.