HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Thomas Island

$85+ Cheap flights from Philadelphia (PHL) to Saint Thomas Island (STT)

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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STT
Apr 30 — May 71
Wed 4/30
Wed 5/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Saint Thomas Island with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Philadelphia to Saint Thomas Island Cyril E King are usually found in September or October, booked 33 days in advance, depart on a Wednesday or Monday and return on a Friday

Cheap flight deals from Philadelphia to Saint Thomas Island

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Saint Thomas Island (STT). 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 April 25, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$236
(Frontier)

One-way from

$85
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$624

Good round-trip deal

$620 or less

Good one-way deal

$403 or less
Provider with most accurate pricing for Philadelphia-Saint Thomas Island Cyril E King flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Saint Thomas Island Cyril E King flights.
Search Deals
From Philadelphia to Saint Thomas Island Cyril E King
Search Deals
One-way flight from Philadelphia to Saint Thomas Island Cyril E King
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to Saint Thomas Island Cyril E King.
Search Deals
Price to beat on a one-way flight from Philadelphia to Saint Thomas Island Cyril E King.
Search Deals

Find flight deals from Philadelphia to Saint Thomas Island

Cheapest flights from Philadelphia to Saint Thomas Island
Explore the most affordable flight options available from Philadelphia to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.

This Frontier deal was found by Cheapflights users on 4/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/66:00 amPHL - STT
1 stop5h 35mFrontier
Fri 6/135:12 pmSTT - PHL
1 stop8h 30mFrontier
Deal found 4/25$236
This CheapOair deal was found by Cheapflights users on 4/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/306:00 amPHL - STT
1 stop5h 40mMultiple Airlines
Sat 6/71:21 pmSTT - PHL
1 stop8h 13mMultiple Airlines
Deal found 4/25$265
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/177:12 pmPHL - STT
1 stop17h 14mSpirit Airlines
Sat 5/2410:52 amSTT - PHL
1 stop11h 51mSpirit Airlines
Deal found 4/25$299
This American Airlines deal was found by Cheapflights users on 4/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:00 pmPHL - STT
2 stops15h 50mAmerican Airlines
Tue 9/91:50 pmSTT - PHL
1 stop7h 30mAmerican Airlines
Deal found 4/25$559
This Delta deal was found by Cheapflights users on 4/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/135:55 amPHL - STT
1 stop9h 06mDelta
Tue 7/151:21 pmSTT - PHL
1 stop7h 44mDelta
Deal found 4/25$599
This United Airlines deal was found by Cheapflights users on 4/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:30 amPHL - STT
2 stops11h 00mUnited Airlines
Mon 7/74:45 pmSTT - PHL
1 stop6h 29mUnited Airlines
Deal found 4/25$719

Cheapflights Fare Finder

Customize your flight search to find flights from Philadelphia to Saint Thomas Island 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 April 25, 2025.
Use the filters below to find and compare flights from Philadelphia to Saint Thomas Island that are best for you.

Fly from

Philadelphia

Fly to

Saint Thomas Island

Route

Depart

Return

Price

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Fri 6/6

6:00 am-11:35 am

1 stop5h 35m

Saint Thomas Island Cyril E King

Fri 6/13

5:12 pm-1:42 am

1 stop8h 30m

$236

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Fri 5/30

6:00 am-11:40 am

1 stop5h 40m

Saint Thomas Island Cyril E King

Sat 6/7

1:21 pm-9:34 pm

1 stop8h 13m

$265

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sat 5/17

7:12 pm-12:26 pm

1 stop17h 14m

Saint Thomas Island Cyril E King

Sat 5/24

10:52 am-10:43 pm

1 stop11h 51m

$299

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Thu 9/4

9:00 pm-12:50 pm

2 stops15h 50m

Saint Thomas Island Cyril E King

Tue 9/9

1:50 pm-9:20 pm

1 stop7h 30m

$559

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sun 7/13

5:55 am-3:01 pm

1 stop9h 06m

Saint Thomas Island Cyril E King

Tue 7/15

1:21 pm-9:05 pm

1 stop7h 44m

$599

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 7/15

6:05 am-12:17 pm

1 stop6h 12m

Saint Thomas Island Cyril E King

Wed 7/16

4:45 pm-11:14 pm

1 stop6h 29m

$689

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Mon 5/19

6:20 am-12:12 pm

1 stop5h 52m

$85

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sat 6/7

5:45 am-2:54 pm

1 stop9h 09m

$148

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 5/27

5:30 am-1:41 pm

1 stop8h 11m

$308

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sun 6/22

8:17 pm-10:49 am

2 stops14h 32m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

Showing 1-10 of 12 results
1
2

Compare providers for flights from Philadelphia to Saint Thomas Island

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Saint Thomas Island in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Saint Thomas Island flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Philadelphia-Saint Thomas Island flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Philadelphia-Saint Thomas Island flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Saint Thomas Island flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Saint Thomas Island flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Saint Thomas Island

Have a flexible travel schedule? Discover the best time to fly to Saint Thomas Island 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 Saint Thomas Island

How far ahead should I book a flight from Philadelphia to Saint Thomas Island?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Saint Thomas Island. Price data was last updated on April 18, 2025.

The price you pay for your flight from Philadelphia to Saint Thomas Island may vary depending on when you book. For the best chance of a lower fare, look to book 33 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Philadelphia to Saint Thomas Island?

Currently, September is the cheapest month in which you can book a flight from Philadelphia to Saint Thomas Island (average of $433). Flying from Philadelphia to Saint Thomas Island in June is currently the most expensive (average of $640). 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.

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

Find hourly flight availability from Philadelphia to Saint Thomas Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 25, 2025.

When flying from Philadelphia to Saint Thomas Island, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 51% versus a flight in the morning.

Reviews of airlines servicing Saint Thomas Island

Get insights into the airlines that provide service to Saint Thomas Island. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Saint Thomas Island. Reviews last updated April 25, 2025.
Read through reviews of airlines operating flights from Philadelphia to Saint Thomas Island, such as Delta, United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,920 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,685 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Spirit Airlines
6.3
Okay
7,943 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Frontier
6.0
Okay
3,284 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Saint Thomas Island. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Philadelphia to Saint Thomas Island round-trip?

    Our cheapest airline available from Philadelphia to Saint Thomas Island is Frontier. Our recent data shows that you can find tickets from as low as $236 on this airline. Additional options worth looking into are Spirit Airlines and American Airlines, starting at $299 and $559 round-trip. Frontier is currently priced 59% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Philadelphia to Saint Thomas Island one-way?

    $85 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and Delta, with prices starting from $148 and $308, respectively.

  • What are the most reliable airlines from Philadelphia to Saint Thomas Island?

    Before booking your flight to Saint Thomas Island from Philadelphia, check out the most reliable airlines to get you to your destination on time: Qatar Airways (100%), Alaska Airlines (73%), American Airlines( 69%).

  • What are the cheapest flights from Philadelphia to Saint Thomas Island?

    On average you can expect to pay $561 for a flight from Philadelphia to Saint Thomas Island. The cheapest flight overall is $283 while the most popular route, (Philadelphia - Saint Thomas Island Cyril E King) is currently priced at $222.

  • Can I find deals for flights from Philadelphia to Saint Thomas Island that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Saint Thomas Island flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Saint Thomas Island?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Saint Thomas Island.

  • Can I find deals for business class flights from Philadelphia to Saint Thomas Island?

    Yes. Cheapflights offers flight deals from Philadelphia to Saint Thomas Island 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 Saint Thomas Island?

    Currently, September is the cheapest month in which you can book a flight from Philadelphia to Saint Thomas Island (average of $433). Flying from Philadelphia to Saint Thomas Island in June is currently the most expensive (average of $640). 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
St. John

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Saint Thomas Island

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Saint Thomas Island flights
Newark to Saint Thomas Island flights
Dulles Intl to Saint Thomas Island flights
LaGuardia to Saint Thomas Island flights
Reagan-National to Saint Thomas Island flights
Newark to Christiansted flights
John F Kennedy Intl to Christiansted flights
Pittsburgh to Christiansted flights
LaGuardia to Christiansted flights
Pittsburgh to Saint Thomas Island flights
Reagan-National to Christiansted flights
Dulles Intl to Christiansted flights
Philadelphia to Christiansted flights
Harrisburg to Saint Thomas Island flights
Allentown to Saint Thomas Island flights
Scranton to Saint Thomas Island flights
State College to Saint Thomas Island flights
Latrobe to Saint Thomas Island flights
Scranton to Christiansted flights
Allentown to Christiansted flights

Top 5 airlines flying from Philadelphia to Saint Thomas Island

Discover the top 5 airlines that operate flights from Philadelphia to Saint Thomas Island. 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 April 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$159FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$211Average$347FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$428Average$664FlexibilityNo cancel feeOn-time71%
DeltaCheapest$464Average$784FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$493Average$707FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.