$389+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SLU
Jul 22 — Jul 291
Round-trip
1 adult, Economy
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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
Best
Last-minute
One-way
Cheapest flights from Philadelphia to CastriesExplore 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 June 22, 2026.
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 June 22, 2026.
This Justfly.com deal was found by Cheapflights users on 6/21. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Sun 10/412:35 pm
SLU
- PHL
2 stops21h 34m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$902
This Gotogate deal was found by Cheapflights users on 6/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Thu 10/1512:35 pm
SLU
- PHL
2 stops21h 34m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$908
This Gotogate deal was found by Cheapflights users on 6/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/53:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Sat 12/1212:35 pm
SLU
- PHL
2 stops27h 09m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$919
This Gotogate deal was found by Cheapflights users on 6/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Mon 11/1612:35 pm
SLU
- PHL
2 stops27h 09m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$932
This Gotogate deal was found by Cheapflights users on 6/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Mon 8/3112:35 pm
SLU
- PHL
2 stops21h 34m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$940
This Booking.com deal was found by Cheapflights users on 6/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/183:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Sat 11/2812:35 pm
SLU
- PHL
2 stops27h 09m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$953
This Travelocity deal was found by Cheapflights users on 6/22. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:00 am
PHL
- SLU
2 stops29h 05m
Multiple Airlines
Sat 7/1112:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$977
This Gotogate deal was found by Cheapflights users on 6/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:00 am
PHL
- SLU
2 stops32h 15m
Multiple Airlines
Tue 7/73:45 pm
SLU
- PHL
2 stops47h 56m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$978
This Mytrip deal was found by Cheapflights users on 6/17. 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.
Mon 10/197:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Sat 10/249:10 am
SLU
- PHL
3 stops29h 34m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$1,022
This Gotogate deal was found by Cheapflights users on 6/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Sat 8/2212:35 pm
SLU
- PHL
2 stops21h 34m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,108
This Gotogate deal was found by Cheapflights users on 6/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Mon 7/2712:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,137
Best flights from Philadelphia to CastriesDiscover carefully curated flight deals from Philadelphia to Castries that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 22, 2026.
Discover carefully curated flight deals from Philadelphia to Castries that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 22, 2026.
This Travelocity deal was found by Cheapflights users on 6/22. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:00 am
PHL
- SLU
2 stops29h 05m
Multiple Airlines
Sat 7/1112:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$977
This Mytrip deal was found by Cheapflights users on 6/19. 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.
Sat 8/157:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Sat 8/222:05 pm
SLU
- PHL
2 stops20h 04m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$1,142
This Gotogate deal was found by Cheapflights users on 6/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/174:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Mon 7/2012:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,211
This Mytrip deal was found by Cheapflights users on 6/21. 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.
Fri 8/213:25 pm
PHL
- SLU
3 stops27h 35m
Multiple Airlines
Mon 8/317:40 pm
SLU
- PHL
2 stops14h 29m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$1,306
This Mytrip deal was found by Cheapflights users on 6/20. 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.
Wed 7/14:20 pm
PHL
- SLU
3 stops22h 55m
Multiple Airlines
Mon 7/612:35 pm
SLU
- PHL
3 stops26h 14m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,412
This Gotogate deal was found by Cheapflights users on 6/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/234:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Sun 7/2612:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$1,416
This Gotogate deal was found by Cheapflights users on 6/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Fri 8/76:00 pm
SLU
- PHL
2 stops21h 41m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$1,444
This Mytrip deal was found by Cheapflights users on 6/20. 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 7/2010:45 am
PHL
- SLU
3 stops25h 20m
Multiple Airlines
Mon 7/2712:35 pm
SLU
- PHL
3 stops26h 14m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,515
Last-minute flights from Philadelphia to CastriesDiscover last-minute flight deals from Philadelphia to Castries. Data last updated June 22, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Castries. Data last updated June 22, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:00 am
PHL
- SLU
2 stops32h 15m
Multiple Airlines
Tue 7/73:45 pm
SLU
- PHL
2 stops47h 56m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$978
This Mytrip deal was found by Cheapflights users on 6/20. 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.
Wed 7/14:20 pm
PHL
- SLU
3 stops19h 45m
Multiple Airlines
Mon 7/612:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,329
This Gotogate deal was found by Cheapflights users on 6/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/24:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Mon 7/612:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,288
This Gotogate deal was found by Cheapflights users on 6/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/67:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Fri 7/1012:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,146
This Travelocity deal was found by Cheapflights users on 6/22. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:00 am
PHL
- SLU
2 stops29h 05m
Multiple Airlines
Sat 7/1112:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$977
This Gotogate deal was found by Cheapflights users on 6/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/174:20 pm
PHL
- SLU
2 stops26h 40m
Multiple Airlines
Mon 7/2012:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,211
This Gotogate deal was found by Cheapflights users on 6/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Mon 7/2712:35 pm
SLU
- PHL
2 stops21h 29m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,137
One-way flights from Philadelphia to CastriesSearch for one-way flight options from Philadelphia to Castries. Find affordable one-way fares based on user searches. Data last updated June 22, 2026.
Search for one-way flight options from Philadelphia to Castries. Find affordable one-way fares based on user searches. Data last updated June 22, 2026.
This Mytrip deal was found by Cheapflights users on 6/22. 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.
Sat 9/57:00 am
PHL
- SLU
2 stops12h 00m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$389
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 June 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $902 (Justfly.com) |
One-way from | $389 (Mytrip) |
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 June 22, 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
Cheapest round-trip
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Wed 7/8
7:00 am-12:05 pm
2 stops29h 05m
Castries George F. L. Charle
Sat 7/11
12:35 pm-10:04 am
2 stops21h 29m
$977
Quickest round-trip
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Sat 8/15
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Sat 8/22
2:05 pm-10:09 am
2 stops20h 04m
$1,142
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Fri 7/17
4:20 pm-7:00 pm
2 stops26h 40m
Castries George F. L. Charle
Mon 7/20
12:35 pm-10:04 am
2 stops21h 29m
$1,211
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Fri 8/21
3:25 pm-7:00 pm
3 stops27h 35m
Castries George F. L. Charle
Mon 8/31
7:40 pm-10:09 am
2 stops14h 29m
$1,306
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Wed 7/1
4:20 pm-3:15 pm
3 stops22h 55m
Castries George F. L. Charle
Mon 7/6
12:35 pm-2:49 pm
3 stops26h 14m
$1,412
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Thu 7/23
4:20 pm-7:00 pm
2 stops26h 40m
Castries George F. L. Charle
Sun 7/26
12:35 pm-10:04 am
2 stops21h 29m
$1,416
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Sun 8/2
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Fri 8/7
6:00 pm-3:41 pm
2 stops21h 41m
$1,444
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Mon 7/20
10:45 am-12:05 pm
3 stops25h 20m
Castries George F. L. Charle
Mon 7/27
12:35 pm-2:49 pm
3 stops26h 14m
$1,515
Cheapest one-way
Quickest one-way
PhiladelphiaCastries
PHL - SLU
PHLSLU
Philadelphia
Sat 9/5
7:00 am-7:00 pm
2 stops12h 00m
$389
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
PHL-SLU
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.
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 June 22, 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.
Comfort
7.2
Overall
7.1
Boarding
7.5
Food
6.4
Crew
7.9
Entertainment
6.8
Reviews
1 / 20
2.0
MediocreAnonymous,Apr 2026
DFW - BDL
Comfort
7.2
Overall
7.1
Boarding
7.5
Food
6.4
Crew
7.9
Entertainment
6.8
Reviews
1 / 20
2.0
MediocreAnonymous,Apr 2026
DFW - BDL
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.
Traveling to a place near Castries?
Book flights to Castries if you plan to visit one of these locationsGros Islet
Rodney Bay
Marigot Bay
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Other flights to Castries
Explore flights to Castries departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 22, 2026.
Complete your trip
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Philadelphia and Castries flights
Browse other Philadelphia and Castries flight options. Last updated on June 22, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on June 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 June 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$558 | Average$752 | FlexibilityNo cancel fee | On-time71% |