$157 Flights from Philadelphia (PHLA) to Castries (SLUA)

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Flight deals from Philadelphia to Castries

Looking for a cheap last-minute deal or the best round-trip flight from Philadelphia to Castries? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Philadelphia to Castries from $157 one-way

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia to Castries flights are currently cheapest in April.

Direct flights from Philadelphia to Castries

Alternative Philadelphia to Castries routes

Looking for the cheapest, fastest or easiest route from Philadelphia to Castries? You could fly into the following airports instead.

Philadelphia to Castries: Flight information

The things to know before you go.
Cheapest flight found$157
Cheapest month to flyApril
Average flight time4 hrs, 47 mins
Most popular airlineAmerican Airlines
Average flights per week1

Finding cheap flights from Philadelphia to Castries: Frequently asked questions

There are 2 airports in Castries: St Lucia Vigie and St Lucia Hewanorra.
The best price we found for a round-trip flight from Philadelphia to Castries is $415. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
4 hours and 47 minutes is the average flight time from Philadelphia to Castries.
American Airlines flies direct from Philadelphia to Castries.
There is one flight per week flying from Philadelphia to Castries, as of February 2026.
The cheapest month to fly from Philadelphia to Castries is usually June.
If you're flying from Philadelphia, the cheapest airport near Castries is St Lucia Hewanorra – which is 19.0 miles away from the center of Castries. We've found flights to this airport from $415.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to Castries on Tuesday, June 9, 2026.
Yes – the average flight time is 4 hours and 47 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Castries but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Castries is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 78°F. September is typically the warmest month in Castries, when it usually averages around 83°F. You can expect the least rain in February. The coldest month is February, with temperatures averaging 77°F. The rainiest month is October.
The cheapest airline that flies to Castries is Air Canada, and the cheapest airline that flies to St Lucia Hewanorra Airport is American Airlines.

Flying from Philadelphia to Castries: what you need to know

  • Philadelphia International Airport (PHL) is Philadelphia's main airport. Check out your options for reserving a flight from Philadelphia to Castries taking off from here.

  • When working out where to land in Castries, George F. L. Charles Airport (SLU) and Hewanorra Airport (UVF) are the primary gateways.

  • Around 4 hours 45 minutes is how long you can expect to be traveling on a direct Philadelphia to Castries flight.

  • Philadelphia and Castries are both in the UTC-4 timezone. That means there's no time difference to adjust for.

  • Leave plenty of time to make your Philadelphia to Castries flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Traveling during a peak time like August? Major public holidays and other popular periods can mean longer lines and delays at security. Be extra cautious and get there up to four hours ahead of an international flight and two hours before domestic departures.

How to find the cheapest flights from Philadelphia to Castries

  • $157 is the lowest price for a one-way ticket from Philadelphia to Castries. A return flight starts from $415. These fares may change depending on availability and demand.

  • Lock in cheap Philadelphia to Castries flights by booking three months ahead. Based on our research, that's the sweet spot for finding the biggest deals.

  • The best month for scoring cheap plane tickets from Philadelphia to Castries is June. Use the 'Whole month' tool to compare all available prices, then select the dates with the lowest fares.

  • Getting a cheap flight from Philadelphia to Castries is easy with Price Alerts. Simply create one of these automatic alerts and we'll get in touch when there's a better deal.

  • Choose your preferred departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your Philadelphia to Castries flight results by 'Best,' 'Cheapest' or 'Fastest.'

Flying from Philadelphia

Philadelphia International Airport (PHL)

  • You can book a direct flight from Philadelphia to Castries jetting off from Philadelphia International Airport (PHL). Start your journey at PHL and end it at Hewanorra Airport (UVF).

  • Check out the deals with American Airlines. This airline offers direct Philadelphia to Castries plane tickets from PHL.

  • Consider adding a stopover to possibly find a cheaper Philadelphia to Castries flight. Simply deselect 'Direct flights only' when browsing departures from Philadelphia International Airport. Break up your trip (and maybe save some cash) by stopping at one of these popular options:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Newark Liberty International Airport (EWR)

    • Pearson International Airport (YYZ)

  • Located around 7 miles from the center of Philadelphia, PHL can be reached in about 15 minutes by car, depending on traffic. The journey by public transport will take roughly 45 minutes.

  • Have an early flight from Philadelphia to Castries? Avoid the hassle of rushing to the terminal (and catch some extra z's) by choosing one of these stays near Philadelphia International Airport:

  • Of the departures from Philadelphia International Airport, 78.93% land on schedule at their destination.

  • The address for PHL is 8500 Essington Ave.

Arriving in Castries

George F. L. Charles Airport (SLU)

  • George F. L. Charles Airport (SLU) to central Castries takes about 5 minutes to reach by car. The center is roughly 1 mile away.

  • It typically takes 40 minutes to get there when traveling by public transport.

  • The last thing you need is a lengthy journey to your hotel if you're landing late on a flight from Philadelphia to Castries. Reserve one of these accommodation options near SLU instead:

  • Say yes to new adventures by picking up a George F. L. Charles Airport rental car. Grab your wheels from Drive A Matic, Final Rentals or Sixt and experience the lesser-explored corners of Castries and beyond.

  • For the best deal, reserve your vehicle from George F. L. Charles Airport around one week in advance of your Philadelphia to Castries flight.

Hewanorra Airport (UVF)

  • Hewanorra Airport (UVF) is roughly 19 miles from the center of Castries. Once you've disembarked your flight from Philadelphia to Castries, it takes approximately 1 hour 10 minutes to reach the heart of the city in a ride-share or cab.

  • Hang the 'Do not disturb' sign on your door and unwind at a hotel near UVF. Here are a few options where you can tuck yourself in after your flight from Philadelphia to Castries:

  • The fastest way to get to where you're going is with a Hewanorra Airport rental car. Pick up your wheels from Drive A Matic, Sixt or Final Rentals and get going in the blink of an eye.

  • Get what you want, not just what's left over. Securing your ride from UVF one week ahead of time often means more savings and a greater selection of vehicles.

Best time to go to Castries

  • It's time to choose your trip dates for your flight from Philadelphia to Castries. June is the busiest month to travel to Castries. If you want a quieter atmosphere, go in February.

  • The warmest month in Castries is September, with temperatures ranging between 79ºF and 86ºF. Book your Philadelphia to Castries ticket then if that's your definition of good weather.

  • If you'd rather travel in cooler conditions, search for a cheap flight from Philadelphia to Castries in February when temperatures average between 75ºF and 82ºF.

More about Castries

  • Once you've booked your flight from Philadelphia to Castries, decide where you'll be dropping your bags. Make one of these accommodation options your base for exploring Castries:

  • There are so many things to see and do in this city it can be difficult to know where to start. Derek Walcott Square, Morne Fortune and Immaculate Conception Church are leading attractions which should feature on every Castries itinerary.

Explore more of Saint Lucia

  • Castries has plenty going for it, but there are so many other parts of Saint Lucia you should also see. Around 20 miles south of Castries, a visit to Vieux Fort will keep you busy. Start with leading attractions like Maria Islands Museum, Anse Des Sables Beach and YoungFaith Park.

  • Travel 15 miles south-east from Castries to visit Micoud, another standout destination in Saint Lucia. Don't leave without exploring Josephine Splash Park and Ti Rocher Community Park.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.