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485 € Cheap Flights from Philadelphia International to Castries

Compare Philadelphia International to Castries flight deals

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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 487 €. Find the lowest prices on one-way and return tickets right here.
Castries.485 € per passenger.Departing Fri, 29 May, returning Fri, 5 Jun.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Fri, 29 May, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 5 Jun, arriving in Philadelphia International.Price includes taxes and charges.From 485 €, select.
Castries.487 € per passenger.Departing Fri, 12 Jun, returning Fri, 19 Jun.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Fri, 12 Jun, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 19 Jun, arriving in Philadelphia International.Price includes taxes and charges.From 487 €, select.
Castries.515 € per passenger.Departing Thu, 10 Sep, returning Tue, 15 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Thu, 10 Sep, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 15 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 515 €, select.
Castries.523 € per passenger.Departing Mon, 24 Aug, returning Fri, 28 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Mon, 24 Aug, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 28 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 523 €, select.
Castries.570 € per passenger.Departing Tue, 25 Aug, returning Wed, 2 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Tue, 25 Aug, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Wed, 2 Sep, arriving in Philadelphia International.Price includes taxes and charges.From 570 €, select.
Castries.572 € per passenger.Departing Thu, 23 Jul, returning Tue, 28 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Thu, 23 Jul, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Tue, 28 Jul, arriving in Philadelphia International.Price includes taxes and charges.From 572 €, select.
Castries.588 € per passenger.Departing Fri, 15 May, returning Fri, 22 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Fri, 15 May, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 22 May, arriving in Philadelphia International.Price includes taxes and charges.From 588 €, select.
Castries.601 € per passenger.Departing Thu, 30 Jul, returning Thu, 6 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Thu, 30 Jul, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Thu, 6 Aug, arriving in Philadelphia International.Price includes taxes and charges.From 601 €, select.
Castries.629 € per passenger.Departing Thu, 28 Jan, returning Sun, 31 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Thu, 28 Jan, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Sun, 31 Jan, arriving in Philadelphia International.Price includes taxes and charges.From 629 €, select.
Castries.651 € per passenger.Departing Mon, 2 Nov, returning Mon, 16 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Mon, 2 Nov, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 16 Nov, arriving in Philadelphia International.Price includes taxes and charges.From 651 €, select.
Castries.780 € per passenger.Departing Mon, 19 Oct, returning Wed, 28 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Mon, 19 Oct, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Wed, 28 Oct, arriving in Philadelphia International.Price includes taxes and charges.From 780 €, select.
Castries.830 € per passenger.Departing Mon, 15 Mar, returning Mon, 22 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Philadelphia International on Mon, 15 Mar, arriving in St Lucia Hewanorra.Inbound indirect flight with Delta, departs from St Lucia Hewanorra on Mon, 22 Mar, arriving in Philadelphia International.Price includes taxes and charges.From 830 €, select.
Castries.939 € per passenger.Departing Sat, 27 Jun, returning Fri, 3 Jul.Return flight with Frontier Airlines and jetBlue.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sat, 27 Jun, arriving in St Lucia Hewanorra.Inbound indirect flight with jetBlue, departs from St Lucia Hewanorra on Fri, 3 Jul, arriving in Philadelphia International.Price includes taxes and charges.From 939 €, select.
Castries.1.058 € per passenger.Departing Sat, 9 May, returning Sat, 25 Jul.Return flight with Frontier Airlines and interCaribbean Airways.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sat, 9 May, arriving in St Lucia Vigie.Inbound indirect flight with interCaribbean Airways, departs from St Lucia Vigie on Sat, 25 Jul, arriving in Philadelphia International.Price includes taxes and charges.From 1.058 €, select.
Castries.1.435 € per passenger.Departing Sat, 19 Dec, returning Fri, 1 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Philadelphia International on Sat, 19 Dec, arriving in St Lucia Hewanorra.Inbound indirect flight with Air Canada, departs from St Lucia Hewanorra on Fri, 1 Jan, arriving in Philadelphia International.Price includes taxes and charges.From 1.435 €, 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 June.
May
from 588 €
Jun
from 487 €
Jul
from 572 €
Aug
from 523 €
Sep
from 515 €
Oct
from 780 €
Nov
from 651 €
Dec
Find prices
Jan
from 629 €
Feb
Find prices
Mar
from 830 €
Apr
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
from 847 €
Search flights

St Lucia Hewanorra

31km from central Castries
Cheapest
from 485 €
Search flights

Philadelphia to Castries: Flight information

The things to know before you go.
Cheapest flight found485 €
Cheapest month to flyMay
Average flight time4 hrs, 48 mins
Most popular airlineAmerican Airlines
Average flights per week1

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 485 €. 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 48 minutes is the average flight time from Philadelphia International to Castries.
American Airlines flies direct from Philadelphia International to Castries.
As of May 2026, there is one flight per week flying from Philadelphia International to Castries.
The cheapest month to fly from Philadelphia International to Castries is usually May.
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 485 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Castries on Friday, 29 May 2026.
Yes – the average flight time is 4 hours and 48 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 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, Air Canada offers the cheapest flight tickets to Castries.

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

  • Castries and Philadelphia (where Philadelphia International Airport is located) are both in the UTC-4 timezone. This means you won't have to change your watch on arrival.

  • Leave enough time to make your PHL to Castries flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Planning to travel during a peak period like school or public holidays? Expect longer queues at security and check-in. To be on the safe side, arrive up to four hours before international flights and two hours ahead of domestic departures.

  • You can book a direct Philadelphia International Airport to Castries ticket. Start your journey at PHL and land at Hewanorra Airport (UVF).

  • American Airlines is a well-known airline that offers direct flights from Philadelphia International Airport to Castries.

  • A stopover is the ideal opportunity to break up your journey and maybe even tick a new city off your list. When searching for plane tickets from PHL to Castries, uncheck the 'Direct flights only' box to see where you can stop along the way. Popular options include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Newark Liberty International Airport (EWR)

    • Pearson International Airport (YYZ)

  • Located around 11 kilometres from the centre of Philadelphia, PHL can be reached in about 15 minutes by car. The journey on public transport takes roughly 45 minutes.

  • Catching an early flight from Philadelphia International Airport to Castries? Avoid the last-minute rush to the airport (and catch some extra z's) by choosing one of these hotels close to PHL:

  • 78.93% of flights departing from Philadelphia International Airport arrive at 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

  • The best price we've seen for a one-way Philadelphia International Airport to Castries flight is 182 €. The cheapest price for a return flight is 485 €. Bear in mind fares may change due to demand at the time of booking.

  • To secure cheap flights from PHL to Castries, book your journey two months before your planned departure.

  • The best month for landing cheap Philadelphia International Airport to Castries tickets is June. Use the 'Whole month' tool to compare prices, then select the dates that offer the lowest fares.

  • Stay on top of deals for cheap flights from PHL to Castries by setting up a Price Alert. We'll send you an email or notification on the app when a new discounted fare appears.

  • Tailor your trip with filters. Select your ideal departure and arrival times, airlines and total journey duration. You can also sort results by 'Fastest,' 'Cheapest' or 'Best' flights from Philadelphia International Airport to Castries.

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 get to the centre driving.

  • When travelling on public transport, expect a journey time of around 40 minutes.

  • Consider booking a hotel near SLU if you have a late flight from Philadelphia International Airport to Castries. Pick one of these accommodation options and avoid the hassle of a long transfer:

  • Pick up a George F. L. Charles Airport rental car and explore Castries and beyond with your own set of wheels. Drive A Matic, Final Rentals and Sixt are popular outlets you can book with here.

  • Booking your ride from George F. L. Charles Airport about one week in advance of your flight from PHL to Castries can help you get the best possible rate.

Hewanorra Airport (UVF)

  • Central Castries is around 56 kilometres from Hewanorra Airport (UVF). After your flight from Philadelphia International Airport to Castries has hit the runway and you've made your way through the terminal, expect a drive of around 1 hour 10 minutes.

  • Hang up the 'Do not disturb' sign and relax at a hotel close to UVF. Here are a few options where you can kick back after your PHL to Castries flight:

  • Drive A Matic, Sixt and Final Rentals make picking up a Hewanorra Airport rental car simple. These providers are located in or around the terminal and will have you behind the wheel before you know it.

  • Avoid last-minute price surges. Booking your ride one week ahead of your arrival at UVF will help you save.

Best time to go to Castries

  • Carefully consider your trip dates before booking your flight from Philadelphia International Airport to Castries. The city buzzes in high season, but hotel prices are often higher and top attractions can be crowded. Plan your trip to Castries in low season if you prefer a quieter 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 (79ºF) to 30ºC (86ºF).

  • February has average temperatures of between 24ºC (75ºF) and 28ºC (82ºF). Search for a cheap ticket from PHL to Castries around that time if you'd rather travel in cooler conditions.

More about Castries

  • When it comes to looking for somewhere to rest your head, you'll find the most popular stays in Castries right here. Check out these hotels after locking in your flight from Philadelphia International Airport to Castries:

  • There are so many things to discover in this city it can be hard to figure out where to start. Morne Fortune, Derek Walcott Square and Immaculate Conception Church are major attractions which should feature on every Castries itinerary.

Plan the rest of your trip from Philadelphia to Castries

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