$497+ Cheap flights from Philadelphia (PHL) to Castries (SLU)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SLU
Oct 24 — Oct 311
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
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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 September 24, 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 September 24, 2026.
This Orbitz deal was found by Cheapflights users on 9/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:00 am -
2 stops32h 15m
Sat 10/243:45 pm -
2 stops46h 59m
Deal found 9/21![Multiple Airlines logo]()
$814
This Air Canada deal was found by Cheapflights users on 9/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:00 am -
2 stops12h 00m
Mon 10/2612:35 pm -
2 stops26h 09m
Deal found 9/22![Multiple Airlines logo]()
$829
This Justfly.com deal was found by Cheapflights users on 9/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:00 am -
2 stops12h 00m
Sun 10/43:45 pm -
2 stops47h 56m
Deal found 9/22![Multiple Airlines logo]()
$854
This Travelocity deal was found by Cheapflights users on 9/21. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:00 am -
2 stops12h 00m
Mon 10/263:45 pm -
2 stops48h 36m
Deal found 9/21![Multiple Airlines logo]()
$888
This Mytrip deal was found by Cheapflights users on 9/23. 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 11/65:05 pm -
3 stops24h 55m
Mon 11/912:15 pm -
3 stops27h 29m
Deal found 9/23![Multiple Airlines logo]()
$1,024
This Mytrip deal was found by Cheapflights users on 9/19. 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 10/177:00 am -
2 stops12h 00m
Sun 10/255:00 am -
2 stops18h 43m
Deal found 9/19![Multiple Airlines logo]()
$1,046
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 September 24, 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 September 24, 2026.
This Air Canada deal was found by Cheapflights users on 9/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:00 am -
2 stops12h 00m
Mon 10/2612:35 pm -
2 stops26h 09m
Deal found 9/22![Multiple Airlines logo]()
$829
This Travelocity deal was found by Cheapflights users on 9/21. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:00 am -
2 stops12h 00m
Mon 10/263:45 pm -
2 stops48h 36m
Deal found 9/21![Multiple Airlines logo]()
$888
This Air Canada deal was found by Cheapflights users on 9/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/73:20 pm -
2 stops26h 40m
Sun 3/1412:35 pm -
2 stops26h 07m
Deal found 9/23![Multiple Airlines logo]()
$927
This Expedia deal was found by Cheapflights users on 9/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/224:35 pm -
2 stops26h 25m
Sat 3/2712:35 pm -
2 stops26h 06m
Deal found 9/19![Multiple Airlines logo]()
$927
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Tue 10/203:25 pm -
3 stops27h 35m
Sat 10/2412:35 pm -
2 stops27h 46m
Deal found 9/21![Multiple Airlines logo]()
$1,049
This Mytrip deal was found by Cheapflights users on 9/24. 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 11/87:50 am -
2 stops31h 15m
Sun 11/156:55 pm -
2 stops29h 40m
Deal found 9/24![Multiple Airlines logo]()
$1,107
This Mytrip deal was found by Cheapflights users on 9/20. 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 11/49:00 am -
3 stops33h 00m
Wed 11/1112:35 pm -
2 stops28h 46m
Deal found 9/20![Multiple Airlines logo]()
$1,166
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Sat 3/64:35 pm -
3 stops25h 25m
Sat 3/139:10 am -
2 stops29h 32m
Deal found 9/20![Multiple Airlines logo]()
$1,582
This Mytrip deal was found by Cheapflights users on 9/19. 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.
Thu 10/87:37 pm -
3 stops23h 23m
Fri 10/1612:35 pm -
3 stops32h 57m
Deal found 9/19![Multiple Airlines logo]()
$1,659
Last-minute flights from Philadelphia to CastriesDiscover last-minute flight deals from Philadelphia to Castries. Data last updated September 24, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Castries. Data last updated September 24, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 9/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:00 am -
2 stops12h 00m
Sun 10/43:45 pm -
2 stops47h 56m
Deal found 9/22![Multiple Airlines logo]()
$854
This Mytrip deal was found by Cheapflights users on 9/19. 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 10/177:00 am -
2 stops12h 00m
Sun 10/255:00 am -
2 stops18h 43m
Deal found 9/19![Multiple Airlines logo]()
$1,046
This Travelocity deal was found by Cheapflights users on 9/21. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:00 am -
2 stops12h 00m
Mon 10/263:45 pm -
2 stops48h 36m
Deal found 9/21![Multiple Airlines logo]()
$888
This Orbitz deal was found by Cheapflights users on 9/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:00 am -
2 stops32h 15m
Sat 10/243:45 pm -
2 stops46h 59m
Deal found 9/21![Multiple Airlines logo]()
$814
This Air Canada deal was found by Cheapflights users on 9/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:00 am -
2 stops12h 00m
Mon 10/2612:35 pm -
2 stops26h 09m
Deal found 9/22![Multiple Airlines logo]()
$829
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 September 24, 2026.
Search for one-way flight options from Philadelphia to Castries. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/59:51 pm -
2 stops38h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$497
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 September 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $814 (Orbitz) |
One-way from | $497 (Kiwi.com) |
Good round-trip deal | $782 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 7,457,451 searches. Data last updated September 24, 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 Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Tue 1/5
9:51 pm-1:10 pm
2 stops38h 19m
Castries George F. L. Charle
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$497
Quickest round-trip
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Thu 10/22
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Mon 10/26
12:35 pm-2:44 pm
2 stops26h 09m
$829
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Mon 10/19
7:00 am-7:00 pm
2 stops12h 00m
Castries George F. L. Charle
Mon 10/26
3:45 pm-4:21 pm
2 stops48h 36m
$888
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Sun 3/7
3:20 pm-7:00 pm
2 stops26h 40m
Castries George F. L. Charle
Sun 3/14
12:35 pm-2:42 pm
2 stops26h 07m
$927
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Mon 3/22
4:35 pm-7:00 pm
2 stops26h 25m
Castries George F. L. Charle
Sat 3/27
12:35 pm-2:41 pm
2 stops26h 06m
$927
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Tue 10/20
3:25 pm-7:00 pm
3 stops27h 35m
Castries George F. L. Charle
Sat 10/24
12:35 pm-4:21 pm
2 stops27h 46m
$1,049
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Sun 11/8
7:50 am-4:05 pm
2 stops31h 15m
Castries George F. L. Charle
Sun 11/15
6:55 pm-11:35 pm
2 stops29h 40m
$1,107
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Wed 11/4
9:00 am-7:00 pm
3 stops33h 00m
Castries George F. L. Charle
Wed 11/11
12:35 pm-4:21 pm
2 stops28h 46m
$1,166
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Sat 3/6
4:35 pm-7:00 pm
3 stops25h 25m
Castries George F. L. Charle
Sat 3/13
9:10 am-1:42 pm
2 stops29h 32m
$1,582
PhiladelphiaCastries
PHL Philadelphia - SLU Castries George F. L. Charle
PHLSLU
Philadelphia
Thu 10/8
7:37 pm-7:00 pm
3 stops23h 23m
Castries George F. L. Charle
Fri 10/16
12:35 pm-9:32 pm
3 stops32h 57m
$1,659
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 September.
| 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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