PHL - SLU

$1,401 Find Cheap Flights from Philadelphia to Castries

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Castries departing on 1/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Castries

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Castries, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Castries, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$1,401
Multiple Airlines
Wed 1/7Sun 1/11
PHL - SLU • 2 stops
Cheapest one-way
Multiple Airlines
Thu 12/18
PHL - SLU • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Castries!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Castries (PHL-SLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Castries that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Castries

Wed, Jan 7 - Sun, Jan 11
Multiple Airlines Logo
7:00 am - 11:20 am
PHL
-
SLU
27h 20m2 stops
Multiple Airlines Logo
7:10 pm - 10:46 pm
SLU
-
PHL
28h 36m2 stops
$1,401Multiple Airlines
Mon, Apr 27 - Wed, May 6
Multiple Airlines Logo
7:00 am - 6:35 pm
PHL
-
SLU
11h 35m3 stops
Multiple Airlines Logo
10:15 am - 10:44 pm
SLU
-
PHL
36h 29m2 stops
$1,422Multiple Airlines
Mon, Apr 27 - Wed, May 6
Multiple Airlines Logo
7:00 am - 6:35 pm
PHL
-
SLU
11h 35m3 stops
Multiple Airlines Logo
10:15 am - 3:39 pm
SLU
-
PHL
53h 24m3 stops
$1,567Multiple Airlines
Fri, Jan 16 - Fri, Jan 23
Multiple Airlines Logo
4:35 pm - 3:15 pm
PHL
-
SLU
45h 40m3 stops
Multiple Airlines Logo
7:10 pm - 10:46 pm
SLU
-
PHL
28h 36m2 stops
$3,420Multiple Airlines
Sat, May 30 - Sun, Jun 7
Multiple Airlines Logo
10:25 am - 11:45 am
PHL
-
SLU
25h 20m3 stops
Multiple Airlines Logo
5:00 am - 10:44 pm
SLU
-
PHL
41h 44m3 stops
$3,498Multiple Airlines
Fri, Apr 3 - Fri, Apr 10
Multiple Airlines Logo
4:25 pm - 11:45 am
PHL
-
SLU
43h 20m3 stops
Multiple Airlines Logo
12:15 pm - 3:44 pm
SLU
-
PHL
51h 29m3 stops
$3,821Multiple Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Castries flights

Get data-powered insights and trends into flights from Philadelphia to Castries to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Philadelphia and Castries?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Philadelphia to Castries.

There is just one airline that flies from Philadelphia to Castries direct and that is American Airlines. The best round-trip deal found from American Airlines for the route is $558.

Find deals

Good to know

Low seasonAugust
Cheapest flight$1,401
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Philadelphia to Castries

When to book flights from Philadelphia to Castries

Are your dates flexible? Find out the best times to travel from Philadelphia to Castries based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Castries

  • What is the cheapest flight from Philadelphia to Castries?

    In the last 3 days, the lowest price for a flight from Philadelphia to Castries was $1,401 for a round-trip ticket.

  • Do I need a passport to fly between Philadelphia and Castries?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Philadelphia and on arrival in Castries.

  • Which aircraft models fly most regularly from Philadelphia to Castries?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Castries?

    oneworld is the only airline alliance operating flights between Philadelphia and Castries.

  • How does KAYAK find such low prices on flights from Philadelphia to Castries?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Castries.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Castries?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Castries from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Castries?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Castries with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and SLU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Castries?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Castries from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Philadelphia to Castries

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Castries. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Castries? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11054 reviews
8.0Crew
6.5Food
7.5Boarding
7.2Comfort
6.9Entertainment
Airline reviews

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

6.0 GoodMichelle, Dec 2025
PHL - YYZ
Read more American Airlines reviews

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

Not comparable to Qatar Airways services on flights to Doha. Flight attendants provided basic services; I was never recognized by name or as an Executive Platinum member. Restrooms were not kept clean during the flight.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Airport in MXP is crazy. Get there at least 2 hours before flight.

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

The flight was canceled 3 hours after original take off time

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Everything you need to know for your flight from Philadelphia to Castries

Information on your arrival and departure airports

Philadelphia (PHL)
Castries (SLU)