HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Castries

$639+ Cheap flights from Philadelphia (PHL) to Castries (SLU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SLU
Apr 17 — Apr 241
Fri 4/17
Fri 4/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Castries with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Philadelphia to Castries

Cheapest flights from Philadelphia to Castries
Explore the most affordable flight options available from Philadelphia to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 18, 2026.

This Mytrip deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
PHL
-
SLU
2 stops12h 25m
Multiple Airlines
Fri 5/296:00 pm
SLU
-
PHL
2 stops21h 38m
Multiple Airlines
Deal found 3/17$961
This Mytrip deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/243:30 pm
PHL
-
SLU
2 stops27h 30m
Multiple Airlines
Sun 3/295:00 am
SLU
-
PHL
2 stops18h 56m
Multiple Airlines
Deal found 3/15$1,054
This Mytrip deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:53 pm
PHL
-
SLU
3 stops42h 42m
Multiple Airlines
Sun 4/196:00 pm
SLU
-
PHL
3 stops27h 57m
Multiple Airlines
Deal found 3/17$1,057
This Mytrip deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
PHL
-
SLU
2 stops13h 00m
Multiple Airlines
Mon 6/227:10 pm
SLU
-
PHL
2 stops15h 04m
Multiple Airlines
Deal found 3/17$1,123
This Mytrip deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:45 am
PHL
-
SLU
3 stops13h 15m
Multiple Airlines
Thu 5/79:50 am
SLU
-
PHL
3 stops37h 47m
Multiple Airlines
Deal found 3/16$1,201
This Mytrip deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/69:15 am
PHL
-
SLU
3 stops33h 45m
Multiple Airlines
Sat 4/115:50 pm
SLU
-
PHL
2 stops30h 06m
Multiple Airlines
Deal found 3/13$1,222

Find flight deals from Philadelphia to Castries

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Castries (SLU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$961
(Mytrip)

One-way from

$639
(Kiwi.com)

Good round-trip deal

$813 or less
Provider with most accurate pricing for Philadelphia-Castries George F. L. Charle flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Castries George F. L. Charle flights.
Search Deals
From Philadelphia to Castries George F. L. Charle
Search Deals
One-way flight from Philadelphia to Castries George F. L. Charle
Search Deals
Price to beat on a round-trip flight from Philadelphia to Castries George F. L. Charle.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Castries that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 18, 2026.
Use the filters below to find and compare flights from Philadelphia to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Tue 5/26

6:00 am-6:25 pm

2 stops12h 25m

Castries George F. L. Charle

Fri 5/29

6:00 pm-3:38 pm

2 stops21h 38m

$961
Quickest round-trip

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Thu 6/18

6:00 am-7:00 pm

2 stops13h 00m

Castries George F. L. Charle

Mon 6/22

7:10 pm-10:14 am

2 stops15h 04m

$1,123

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Mon 4/6

9:15 am-7:00 pm

3 stops33h 45m

Castries George F. L. Charle

Sat 4/11

5:50 pm-11:56 pm

2 stops30h 06m

$1,222

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Tue 6/2

6:00 am-9:30 am

3 stops27h 30m

Castries George F. L. Charle

Sat 6/6

5:50 pm-3:38 pm

2 stops21h 48m

$1,292

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Fri 6/12

3:25 pm-10:10 pm

3 stops30h 45m

Castries George F. L. Charle

Wed 6/17

10:15 am-10:14 am

2 stops23h 59m

$1,453

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Sat 8/1

7:00 am-10:10 pm

3 stops15h 10m

Castries George F. L. Charle

Sat 8/15

5:50 pm-9:34 pm

3 stops27h 44m

$1,694
Cheapest one-way
Quickest one-way

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Wed 7/15

8:03 am-1:10 pm

2 stops29h 07m

$639

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Sorted by cheapest first

Compare providers for flights from Philadelphia to Castries

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Castries in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Castries flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Castries flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Castries flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Castries flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Castries flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Castries

What is the cheapest month to book a flight from Philadelphia to Castries?

Currently, September is the cheapest month in which you can book a flight from Philadelphia to Castries (average of $148). Flying from Philadelphia to Castries in June is currently the most expensive (average of $387). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Castries

Get insights into the airlines that provide service to Castries. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Castries. Reviews last updated March 18, 2026.
Get a feel of what it's like to fly with American Airlines from Philadelphia to Castries by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,468 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Crew

7.9

Overall

7.1

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,468 reviews
American Airlines
7.1
Good
11,468 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Crew

7.9

Overall

7.1

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Castries. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Philadelphia to Castries round-trip?

    According to our current data, American Airlines ($587), offers the cheapest pricing from Philadelphia to Castries.

  • Can I find deals for flights from Philadelphia to Castries that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Castries flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Castries?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Castries.

  • Can I find deals for business class flights from Philadelphia to Castries?

    Yes. Cheapflights offers flight deals from Philadelphia to Castries by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Castries?

    Currently, September is the cheapest month in which you can book a flight from Philadelphia to Castries (average of $148). Flying from Philadelphia to Castries in June is currently the most expensive (average of $387). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Castries?

Book flights to Castries if you plan to visit one of these locations
Gros Islet
Rodney Bay
Marigot Bay

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Castries

See prices for flight routes from nearby airports that may be better suited for you.
Pittsburgh to Castries flights

Top airline flying from Philadelphia to Castries

Discover the top airline that operate flights from Philadelphia to Castries. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$587Average$817FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.