$350+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SLU
Sep 6 — Sep 131
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 August 7, 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 August 7, 2026.
This Gotogate deal was found by Cheapflights users on 8/1. 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.
Tue 10/67:00 am -
2 stops12h 00m
Sat 10/1012:35 pm -
2 stops21h 19m
Deal found 8/1![Multiple Airlines logo]()
$679
This Gotogate deal was found by Cheapflights users on 8/3. 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 10/57:00 am -
2 stops12h 00m
Fri 10/912:35 pm -
2 stops21h 19m
Deal found 8/3![Multiple Airlines logo]()
$681
This Expedia deal was found by Cheapflights users on 8/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/203:20 pm -
2 stops26h 40m
Wed 11/2512:35 pm -
2 stops28h 46m
Deal found 8/3![Multiple Airlines logo]()
$739
This Expedia deal was found by Cheapflights users on 8/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:05 pm -
2 stops24h 55m
Tue 12/112:35 pm -
2 stops28h 46m
Deal found 8/1![Multiple Airlines logo]()
$743
This Booking.com deal was found by Cheapflights users on 8/5. 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.
Sun 9/67:00 am -
2 stops12h 00m
Fri 9/1112:35 pm -
2 stops21h 36m
Deal found 8/5![Multiple Airlines logo]()
$756
This Expedia deal was found by Cheapflights users on 8/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am -
2 stops12h 00m
Sat 10/3112:35 pm -
2 stops28h 46m
Deal found 8/4![Multiple Airlines logo]()
$787
This FlightHub deal was found by Cheapflights users on 8/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:50 am -
2 stops32h 10m
Sun 10/412:35 pm -
2 stops21h 19m
Deal found 8/1![Multiple Airlines logo]()
$811
This Expedia deal was found by Cheapflights users on 8/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am -
2 stops32h 15m
Mon 9/2812:35 pm -
2 stops27h 06m
Deal found 8/5![Multiple Airlines logo]()
$826
This Gotogate deal was found by Cheapflights users on 8/3. 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 9/47:00 am -
2 stops12h 00m
Mon 9/712:35 pm -
2 stops21h 36m
Deal found 8/3![Multiple Airlines logo]()
$927
This Gotogate deal was found by Cheapflights users on 8/4. 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 9/47:00 am -
2 stops12h 00m
Fri 9/1112:35 pm -
2 stops21h 36m
Deal found 8/4![Multiple Airlines logo]()
$932
This Gotogate deal was found by Cheapflights users on 8/4. 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 10/47:00 am -
2 stops12h 00m
Sun 10/1112:35 pm -
2 stops21h 19m
Deal found 8/4![Multiple Airlines logo]()
$1,027
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 August 7, 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 August 7, 2026.
This Gotogate deal was found by Cheapflights users on 8/3. 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 10/57:00 am -
2 stops12h 00m
Fri 10/912:35 pm -
2 stops21h 19m
Deal found 8/3![Multiple Airlines logo]()
$681
This Expedia deal was found by Cheapflights users on 8/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/203:20 pm -
2 stops26h 40m
Wed 11/2512:35 pm -
2 stops28h 46m
Deal found 8/3![Multiple Airlines logo]()
$739
This Booking.com deal was found by Cheapflights users on 8/5. 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.
Sun 9/67:00 am -
2 stops12h 00m
Fri 9/1112:35 pm -
2 stops21h 36m
Deal found 8/5![Multiple Airlines logo]()
$756
This FlightHub deal was found by Cheapflights users on 8/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:50 am -
2 stops32h 10m
Sun 10/412:35 pm -
2 stops21h 19m
Deal found 8/5![Multiple Airlines logo]()
$811
This Expedia deal was found by Cheapflights users on 8/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am -
2 stops32h 15m
Mon 9/2812:35 pm -
2 stops27h 06m
Deal found 8/5![Multiple Airlines logo]()
$826
This Gotogate deal was found by Cheapflights users on 8/3. 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 9/47:00 am -
2 stops12h 00m
Mon 9/712:35 pm -
2 stops21h 36m
Deal found 8/3![Multiple Airlines logo]()
$927
This Mytrip deal was found by Cheapflights users on 8/2. 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 11/17:35 pm -
2 stops22h 25m
Sun 11/86:55 pm -
2 stops22h 26m
Deal found 8/2![Multiple Airlines logo]()
$1,217
This Mytrip deal was found by Cheapflights users on 8/2. 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 1/145:05 pm -
3 stops21h 10m
Mon 1/1812:35 pm -
3 stops28h 46m
Deal found 8/2![Multiple Airlines logo]()
$1,845
This Expedia deal was found by Cheapflights users on 8/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/283:20 pm -
2 stops26h 40m
Sun 1/39:10 am -
2 stops30h 34m
Deal found 8/6![Multiple Airlines logo]()
$1,913
Last-minute flights from Philadelphia to CastriesDiscover last-minute flight deals from Philadelphia to Castries. Data last updated August 7, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Castries. Data last updated August 7, 2026 and is based on user searches.
This Travelocity deal was found by Cheapflights users on 8/4. 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.
Mon 8/177:00 am -
2 stops12h 00m
Thu 8/203:45 pm -
2 stops42h 24m
Deal found 8/4![Multiple Airlines logo]()
$1,469
This Mytrip deal was found by Cheapflights users on 8/3. 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 9/34:20 pm -
2 stops22h 15m
Tue 9/83:45 pm -
2 stops42h 26m
Deal found 8/3![Multiple Airlines logo]()
$1,225
This Gotogate deal was found by Cheapflights users on 8/3. 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 9/47:00 am -
2 stops12h 00m
Mon 9/712:35 pm -
2 stops21h 36m
Deal found 8/3![Multiple Airlines logo]()
$927
This Gotogate deal was found by Cheapflights users on 8/4. 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 9/47:00 am -
2 stops12h 00m
Fri 9/1112:35 pm -
2 stops21h 36m
Deal found 8/4![Multiple Airlines logo]()
$932
This Booking.com deal was found by Cheapflights users on 8/5. 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.
Sun 9/67:00 am -
2 stops12h 00m
Fri 9/1112:35 pm -
2 stops21h 36m
Deal found 8/5![Multiple Airlines logo]()
$756
This Expedia deal was found by Cheapflights users on 8/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am -
2 stops32h 15m
Mon 9/2812:35 pm -
2 stops27h 06m
Deal found 8/5![Multiple Airlines logo]()
$826
This FlightHub deal was found by Cheapflights users on 8/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:50 am -
2 stops32h 10m
Sun 10/412:35 pm -
2 stops21h 19m
Deal found 8/1![Multiple Airlines logo]()
$811
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 August 7, 2026.
Search for one-way flight options from Philadelphia to Castries. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
This Travelocity deal was found by Cheapflights users on 8/5. 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.
Sun 10/1110:35 am -
2 stops49h 30m
Deal found 8/5![Multiple Airlines logo]()
$350
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 August 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $679 (Gotogate) |
One-way from | $350 (Travelocity) |
Good round-trip deal | $753 or less |
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 August 7, 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
Quickest round-trip
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Mon 10/5
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Fri 10/9
12:35 pm-9:54 am
2 stops21h 19m
$681
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Fri 11/20
3:20 pm-7:00 pm
2 stops26h 40m
Castries George F. L. Charle
Wed 11/25
12:35 pm-4:21 pm
2 stops28h 46m
$739
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Sun 9/6
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Fri 9/11
12:35 pm-10:11 am
2 stops21h 36m
$756
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Wed 9/30
10:50 am-7:00 pm
2 stops32h 10m
Castries George F. L. Charle
Sun 10/4
12:35 pm-9:54 am
2 stops21h 19m
$811
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Fri 9/25
7:00 am-3:15 pm
2 stops32h 15m
Castries George F. L. Charle
Mon 9/28
12:35 pm-3:41 pm
2 stops27h 06m
$826
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Fri 9/4
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Mon 9/7
12:35 pm-10:11 am
2 stops21h 36m
$927
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Sun 11/1
7:35 pm-7:00 pm
2 stops22h 25m
Castries George F. L. Charle
Sun 11/8
6:55 pm-4:21 pm
2 stops22h 26m
$1,217
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Thu 1/14
5:05 pm-3:15 pm
3 stops21h 10m
Castries George F. L. Charle
Mon 1/18
12:35 pm-4:21 pm
3 stops28h 46m
$1,845
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Mon 12/28
3:20 pm-7:00 pm
2 stops26h 40m
Castries George F. L. Charle
Sun 1/3
9:10 am-2:44 pm
2 stops30h 34m
$1,913
Cheapest one-way
Quickest one-way
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Sun 10/11
10:35 am-12:05 pm
2 stops49h 30m
$350
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | 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.
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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