What is the cheapest day to fly from Philadelphia to Castries?

Travelers seeking maximum savings on their Philadelphia to Castries flight should consider departing on Thursday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 17% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from Philadelphia to Castries?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, September can be a great choice for travel to Castries. Flights to Castries from Philadelphia in September are about $863 on average during September, but can be found for as low as $394.

What is the cheapest time of day to fly from PHL to SLU?

A simple way to save on the total cost of your ticket is to fly from Philadelphia to Castries in the morning. If you’re flexible enough to do this you can expect to save up to 5% on your trip compared to booking a flight at noon.

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.

$430+ Flights from Philadelphia to Castries

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Cheap flight deals from Philadelphia to Castries

Round-trip from	$907 (Mytrip)
Popular in	December
Cheapest in	September
Average price	$774
Good round-trip deal	$592 or less

From Philadelphia to Castries George F. L. Charle

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Highest demand for flights based on searches. 24% potential increase in price ($272 potential increase over avg. RT price).

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Cheapest flight prices on average. 12% potential price decrease ($100 potential savings vs. average RT price).

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Average for round-trip flights in July 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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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 julio 30, 2025.

sáb. 9/208:30 pmPHL - SLU

3 stops43h 20mMultiple Airlines

sáb. 9/279:10 amSLU - PHL

3 stops35h 35mMultiple Airlines

Deal found 7/29

$907

Best flights from Philadelphia to Castries
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 julio 30, 2025.

sáb. 9/208:30 pmPHL - SLU

3 stops43h 20mMultiple Airlines

sáb. 9/279:10 amSLU - PHL

3 stops35h 35mMultiple Airlines

Deal found 7/29

$907

Last-minute flights from Philadelphia to Castries
Discover last-minute flight deals from Philadelphia to Castries. Data last updated julio 30, 2025 and is based on user searches.

lun. 8/255:05 amPHL - SLU

2 stops11h 55mMultiple Airlines

sáb. 8/303:45 pmSLU - PHL

3 stops31h 35mMultiple Airlines

Deal found 7/30

$1,281

One-way flights from Philadelphia to Castries
Search for one-way flight options from Philadelphia to Castries. Find affordable one-way fares based on user searches. Data last updated julio 30, 2025.

jue. 11/205:15 amPHL - SLU

2 stops29h 15mMultiple Airlines

Deal found 7/28

$430

Cheapflights Fare Finder

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

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

sáb. 9/20

8:30 pm-3:50 pm

3 stops43h 20m

Castries George F. L. Charle

sáb. 9/27

9:10 am-8:45 pm

3 stops35h 35m

$907

PhiladelphiaCastries

PHL - SLU

PHLSLU

Philadelphia

jue. 11/20

5:15 am-11:30 am

2 stops29h 15m

$430

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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

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.

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Alternative routes for Philadelphia to Castries

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Other flights to Castries

Top airline flying from Philadelphia to Castries

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$547	Average$820	FlexibilityNo cancel fee	On-time71%

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$430+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia to Castries with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Philadelphia to Castries

Round-trip from

Popular in

Cheapest in

Average price

Good round-trip deal

Find flight deals from Philadelphia to Castries

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 julio 30, 2025.

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 julio 30, 2025.

Cheapflights Fare Finder

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

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.

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?

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?

How can I find direct flights from Philadelphia to Castries?

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

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

Traveling to a place near Castries?

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Alternative routes for Philadelphia to Castries

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Top airline flying from Philadelphia to Castries

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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 julio 30, 2025.