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Castries

$728+ 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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SLU
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 12, 2025.

Round-trip from

$861
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$965

Good round-trip deal

$582 or less

Good one-way deal

$353 or less
From Philadelphia to Castries George F. L. Charle
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Highest demand for flights based on searches. 26% potential increase in price ($303 potential increase over avg. RT price).
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Cheapest flight prices on average. 13% potential price decrease ($103 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Philadelphia to Castries George F. L. Charle.
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Price to beat on a one-way flight from Philadelphia to Castries George F. L. Charle.
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Find 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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/11. 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 7/23:05 pmPHL - SLU
3 stops27h 55mMultiple Airlines
Sun 7/612:10 pmSLU - PHL
3 stops26h 23mMultiple Airlines
Deal found 6/11$861

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 12, 2025.
Use the filters below to find and compare flights from Philadelphia to Castries that are best for you.

Fly from

Philadelphia

Fly to

Castries

Route

Depart

Return

Price

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Wed 7/2

3:05 pm-7:00 pm

3 stops27h 55m

Castries George F. L. Charle

Sun 7/6

12:10 pm-2:33 pm

3 stops26h 23m

$861

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

Wed 11/26

6:35 pm-11:30 am

3 stops39h 55m

$728

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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, August is the cheapest month in which you can book a flight from Philadelphia to Castries (average of $525). Flying from Philadelphia to Castries in July is currently the most expensive (average of $767). 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.

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.

  • 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, August is the cheapest month in which you can book a flight from Philadelphia to Castries (average of $525). Flying from Philadelphia to Castries in July is currently the most expensive (average of $767). 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 Philadelphia?

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

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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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$435Average$752FlexibilityNo cancel feeOn-time71%

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