$189 Find Cheap Flights from Philadelphia to Saint Lucia - Compare and Save

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Price, demand and travel trends for Philadelphia to Saint Lucia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Philadelphia to Saint Lucia cheaper or more expensive than last year?

Fares from Philadelphia to Saint Lucia are running about 7% higher than they were around this time last year, averaging $818 round-trip.

What are the cheapest fares from Philadelphia to Saint Lucia right now?

The cheapest fare from Philadelphia to Saint Lucia in the last week was $476 round-trip, to Castries Hewanorra (UVF).

What’s the cheapest month to fly from Philadelphia to Saint Lucia?

February is the cheapest time of year to fly, with average fares of $708. Prices are highest in December, when average flight costs increase to around $1,209.

When is the best time to book flights from Philadelphia to Saint Lucia?

Book your flights 3 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 51% compared to booking last-minute (within 2 weeks of departure).

Which airport in Saint Lucia is the cheapest to fly to from Philadelphia?

All flights from Philadelphia to Saint Lucia arrive at Castries Hewanorra (UVF). On average, round-trip fares are around $842.

What’s the cheapest day to fly from Philadelphia to Saint Lucia?

Saturday tends to be the cheapest day to fly from Philadelphia to Saint Lucia, while Monday is the most expensive. Fares run about 24% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Philadelphia to Saint Lucia?

Data from the past 12 months shows it's cheapest to fly to Saint Lucia during the evening with average prices of $412. The morning is the most expensive time to fly, with average prices of $873.

Key details for Philadelphia to Saint Lucia flights

Low season

September

Cheapest flight

$189
Beat the crowds with an average 51% drop in travelers.
The most popular month to fly with an average 46% increase in travelers.
One-way flight from Philadelphia to Castries

Your Philadelphia to Saint Lucia flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Philadelphia to Saint Lucia?

    Yes. Fares from Philadelphia to Saint Lucia are low right now. As a rule of thumb, a round-trip under $721 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Philadelphia to Saint Lucia?

    Over the past 12 months, round-trip fares from Philadelphia to Saint Lucia have ranged from $721 to $1,089.

  • What are the main airports serving Saint Lucia?

    Flights to Saint Lucia use two main airports, Castries George F. L. Charle (SLU) and Castries Hewanorra (UVF).

  • What airlines fly nonstop from Philadelphia to Saint Lucia?

    Based on the flight schedule for the next 3 months, just one airline regularly flies nonstop from Philadelphia to Saint Lucia: American Airlines.

  • Where in Saint Lucia can I fly nonstop from Philadelphia?

    Based on the flight schedule for the next 3 months, you can only fly nonstop from Philadelphia to Castries.

  • Is it cheaper to fly with a layover from Philadelphia to Saint Lucia?

    Yes. Nonstop flights from Philadelphia to Saint Lucia average $813 over the past 12 months. Flights with a layover can cost less, cheapest when connecting through Toronto Pearson Intl (YYZ), with average fares of $470.

  • How long is a flight from Philadelphia to Saint Lucia?

    Flights from Philadelphia to Saint Lucia take 4h 47m on average.

  • Which cabin classes are available on flights from Philadelphia to Saint Lucia?

    On flights from Philadelphia to Saint Lucia you can only book Economy Class.

  • What are the earliest and latest flights from Philadelphia to Saint Lucia?

    The earliest nonstop flight from Philadelphia to Saint Lucia departs at 8:15 am and the latest departs at 9:24 am. Nonstop flights take about 4h 47m.

Your guide to booking Philadelphia to Saint Lucia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 3 weeks before your trip. KAYAK data shows fares in this window are around 51% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for February when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Saturday is usually the cheapest. Flights on Monday cost about 24% more on average, so being flexible with your travel dates could help you save.
  • Start your trip in Castries, which is the most popular destination in Saint Lucia. From there, it's easy to continue on to other popular destinations such as Soufrière, Gros Islet and Vieux Fort.
  • If you want the shortest trip, choose the Philadelphia to Saint Lucia nonstop route. If you'd rather save money, the route via Toronto Pearson Intl (YYZ) is usually the cheapest.

Reviews of the top 3 airlines serving from Philadelphia to Saint Lucia

 
Need help choosing which airline to fly with from Philadelphia to Saint Lucia? 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.
7.8
DeltaOverall score based on 8690 reviews
8.1Boarding
7.8Comfort
8.5Crew
7.2Food
7.8Entertainment
Airline reviews

We experienced delays in small increments that added up to more than an hour. At the gate, staff showed little concern and compared our delay with the inbound flight’s two-hour tarmac wait, which didn’t address our situation. Once onboard, the flight attendants seemed tired and unfriendly. I understand delays are frustrating for everyone, but passengers shouldn’t feel blamed for them. During the flight, a bright light above the emergency exit stayed on. It was concerning, and no one explained it or offered passengers the option to move. After landing, we waited about 30 minutes on the tarmac for a gate, then waited again for an agent to connect the plane to the terminal. From the Reagan gate staff to the cabin crew and RDU personnel, the service felt dismissive throughout. Overall, this was a stressful trip and a very disappointing customer-service experience

4.0 OkayRonald, Oct 2026
Read more Delta reviews

We experienced delays in small increments that added up to more than an hour. At the gate, staff showed little concern and compared our delay with the inbound flight’s two-hour tarmac wait, which didn’t address our situation. Once onboard, the flight attendants seemed tired and unfriendly. I understand delays are frustrating for everyone, but passengers shouldn’t feel blamed for them. During the flight, a bright light above the emergency exit stayed on. It was concerning, and no one explained it or offered passengers the option to move. After landing, we waited about 30 minutes on the tarmac for a gate, then waited again for an agent to connect the plane to the terminal. From the Reagan gate staff to the cabin crew and RDU personnel, the service felt dismissive throughout. Overall, this was a stressful trip and a very disappointing customer-service experience

My flight from Atlanta to Oklahoma City was delayed multiple times. I ended up arriving in Oklahoma City nearly two hours later at around 1:50 am the following morning. This was a highly disappointing experience.

This a short easy flight. No food or drink but that was not an issue since we were only in the air for 35 minutes.

No Internet, no backseat screen, no nothing. I bought a Delta ticket and ended up on American Airlines. How did that happen?

Connection flights should be spaced out farther because too close I missed my connection.

The flight was way too HOT! And the plane did not have any in-flight TV entertainment.

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

We splurged and decided to fly first class. Seats were roomy. But flight crew arrived late to the airport. That delayed our flight. Most of the passengers had to try to make connections flights. I felt bad for them. We checked 4 bags. We got three from the baggage claim carousel. 4th one was lost. Delta online help wasn’t good. Baggage claim staff were sympathetic and nice but we waited around for almost 2 hours and it had t been found. They did find it several hours later and we had to drive back to airport to retrieve it. I won’t be splurging on 1st. Lass again anytime soon. I think we got worse service. I am also not a huge fan of delta but we have family in ATL so we don’t have a ton of choice. What should have been an easy flight turned into a stressful event due to flight crew tardiness and baggage mishandling.

My flight consistently said it was on time and the plane didn’t arrive until after 30 minutes after take off and nothing was announced to passengers

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

Plane was packed but flew on-time, and the comfort level was great! All planes are a bit cramped, but the in flight entertainment was superb, snacks were nice, and the crew was polite. Got into Calgary on schedule...all we could ask for

I am very tall. All airline seats are a bit uncomfortable.

Lots of announcements that no wheeled carry on bags were allowed on the flight, yet the overhead bins were totally full and made it uncomfortable trying to get through and significantly held up departure. Why were they allowed on when they said that they weren't? Trash only came by soon after service and I wasn't ready to dispose of it. I had to first hold on to it and after flagging and attendant was told to stuff it in the seat back! I have never run into the need to walk outside in northern winter weather at an international airport and wasn't dressed to do so in the cold pouring rain! I'm not thinking that I'll be back unless I hear things have changed.

No complaints l will always do Air Canada once they are flying where I want to go

Flight was delayed an ultimately cancelled. Took me close to 45 mins with an Air Canada staff to be put on another flight.

Boarding was particularly poorly done with disregard for courtesy, professionalism, and efficiency. Think mid 70’s bus station.

My trip was ruined by the restrictions hidden in their "basic economy" plan. I'd flown hundreds of times and never encountered a program that does not allow changes of any kind. I don't know whose interface hid this information more, but I'm unlikely to use Kayak or Air Canada again after that experience.

Air Canada staff needs to be trained in hospitality. Most flight attendants are with attitude. Air Canada needs to carry additional food on board especially vegetarian plates as this category of travellers are on the rise. This is necessary for long distance flights. Blankets are cheap. Seats are not designed well Lower back portion should be thicker. Everytime thr passenger at the back of me took stuff or put stuff in the pocket of the seat in front of them which is my seat, I could feel them pushing or hitting on my chair.

It was a late flight; crew was invisible. Zero air flow - the tiny plane was a sauna; the left the lights on for 1/2 of the flight; there was no water. Never again.

What an amazing plane! We flew a 787 to Miami. Although the Internet was not functioning, it was a wonderful flight.

Plane was in good shape, multiple passes from the drink cart, and one of the smoothest flights I've had in a while.

Smell of jet fuel was overwhelming from inside the plane while on the ground at take off and landing. Gave me a sore throat and a headache. During boarding, de-planing, taxi-ing, waiting in line for take off, etc. Also, the vents didn't have enough cool air coming out (yes, off course I opened it all the way) so the whole flight was hot and stuffy. But just my vent - all the vents.

After lack of help in Philadelpha made us late to board our flight to akansas City, our flight to Kansas City was very good. And the flight attendants were also very good. The only thing that sucked was problems with assistance in Philadelphia caused our bags not to arrive.

AA needs to review it's policy whereby it's most tenured staff gets to pick their flights. This tends to place flight attendants with the most jaded customer service attitudes on long haul flights. Whilst I realize this is a generality I have experienced increasing levels of woefully poor customer service. One particular flight attendant on this flight was downright rude to several customers. After serving an awful meal they disappeared to their cots below deck and for the most part did not reappear until 1.5hrs before landing. A very disappointing flight.

Legroom was decent, but the seat comfort was horrible; I believe the seat cushions have lost their cushion. I was uncomfortable and had back pain throughout the nearly five-hour flight. WiFi did not work despite my attempts to get it up and running. This was very frustrating as passengers all around me were streaming football games, movies, and accessing email and text messages. One flight attendant suggested it was my seat, but that makes no sense, given WiFi doesn't work that way. On another note, I rarely have a good experience with aainflight.com.

Id like for them to not have lost my bag. And maybe be a little nicer to me, given the fact they lost my bag.

Seats are uncomfortable and my impressive barely 5’10” frame meant my knees were touching the seat in front of me. My 5’3” sweetheart found the seats equally uncomfortable The crew were transactional. The food edible. The entertainment manageable. The boarding process efficient. The experience okay.

Hey as long as you bring me back to earth in one piece I’m good! Otherwise great flight smooth take off and landing good staff Only thing is the staff at the back of the aircraft chatters a lot it’s annoying at times but I’ll let that go because they are very sweet overall.

More options for your flight from Philadelphia to Saint Lucia

Complete your trip to Saint Lucia with a hotel stay or car rental