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

$128+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — STT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 May, booked 33 days in advance, depart on a Sunday or Tuesday and return on a Wednesday

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 September 15, 2025.

Round-trip from

$259
(Cheapflightsfares)

One-way from

$128
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$509

Good round-trip deal

$730 or less

Good one-way deal

$348 or less
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
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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 September 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 10/257:54 pmPHL - STT
1 stop14h 02mSpirit Airlines
Sat 11/111:01 amSTT - PHL
1 stop12h 35mSpirit Airlines
Deal found 9/14$259
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Wed 11/127:00 amPHL - STT
1 stop7h 11mSpirit Airlines
Tue 11/181:33 pmSTT - PHL
1 stop11h 59mSpirit Airlines
Deal found 9/13$264
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:50 pmPHL - STT
1 stop12h 06mSpirit Airlines
Tue 10/711:01 amSTT - PHL
1 stop12h 35mSpirit Airlines
Deal found 9/12$265
This Mytrip deal was found by Cheapflights users on 9/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:50 pmPHL - STT
1 stop11h 54mSpirit Airlines
Tue 10/711:01 amSTT - PHL
1 stop12h 35mSpirit Airlines
Deal found 9/13$268
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
Wed 11/128:05 pmPHL - STT
1 stop15h 23mSpirit Airlines
Wed 11/191:33 pmSTT - PHL
1 stop11h 59mSpirit Airlines
Deal found 9/14$273
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 10/187:54 pmPHL - STT
1 stop14h 02mSpirit Airlines
Sat 10/252:01 pmSTT - PHL
1 stop7h 23mSpirit Airlines
Deal found 9/13$278
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:05 amPHL - STT
1 stop8h 30mMultiple Airlines
Sun 11/23:37 pmSTT - PHL
1 stop10h 37mMultiple Airlines
Deal found 9/12$282
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/275:05 amPHL - STT
1 stop28h 51mMultiple Airlines
Thu 10/302:40 pmSTT - PHL
1 stop10h 37mMultiple Airlines
Deal found 9/12$285

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 September 15, 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

Sun 11/16

7:00 am-3:11 pm

1 stop7h 11m

Saint Thomas Island Cyril E King

Fri 11/21

1:33 pm-12:32 am

1 stop11h 59m

$330

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Wed 12/3

5:15 am-3:11 pm

2 stops8h 56m

Saint Thomas Island Cyril E King

Mon 12/8

4:06 pm-10:05 pm

1 stop6h 59m

$346

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Thu 1/8

5:15 am-12:28 pm

1 stop6h 13m

Saint Thomas Island Cyril E King

Sun 1/11

4:06 pm-10:05 pm

1 stop6h 59m

$378

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sat 10/18

11:30 am-9:56 am

2 stops22h 26m

Saint Thomas Island Cyril E King

Sat 11/8

1:33 pm-12:32 am

1 stop11h 59m

$437

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Thu 11/6

1:31 pm-12:28 pm

3 stops21h 57m

Saint Thomas Island Cyril E King

Sun 11/9

1:33 pm-12:32 am

1 stop11h 59m

$448

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Fri 12/12

5:15 am-3:11 pm

2 stops8h 56m

Saint Thomas Island Cyril E King

Fri 12/19

1:33 pm-12:32 am

1 stop11h 59m

$460

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Thu 11/13

8:05 pm-3:11 pm

2 stops18h 06m

Saint Thomas Island Cyril E King

Fri 11/21

1:33 pm-12:32 am

1 stop11h 59m

$476

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sun 11/2

5:20 am-2:30 pm

1 stop8h 10m

Saint Thomas Island Cyril E King

Fri 11/7

1:33 pm-12:32 am

1 stop11h 59m

$506

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 1/13

8:20 am-1:20 pm

Nonstop4h 00m

Saint Thomas Island Cyril E King

Sun 1/18

6:35 pm-12:42 am

1 stop7h 07m

$575

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sat 11/15

6:35 pm-11:43 am

1 stop16h 08m

Saint Thomas Island Cyril E King

Sat 11/22

5:10 pm-8:25 pm

Nonstop4h 15m

$600

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 20 results
1
2

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 September 12, 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 $643). 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 September 15, 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 52% 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 September 15, 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
7,954 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Spirit Airlines
6.3
Okay
8,015 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,172 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • How long is the flight from Philadelphia to Saint Thomas Island?

    There are many flights that can get you from Philadelphia to Saint Thomas Island in 7h 11m. Fly via Spirit Airlines to get the fastest option. The distance between Philadelphia and Saint Thomas Island is about 1608 mi.

  • 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 $108 on this airline. Additional options worth looking into are Spirit Airlines and American Airlines, starting at $227 and $435 round-trip. Frontier is currently priced 81% below the average price you’ll pay for this route.

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

    On average you can expect to pay $639 for a flight from Philadelphia to Saint Thomas Island. The cheapest flight overall is $323 while the most popular route, (Philadelphia - Saint Thomas Island Cyril E King) is currently priced at $259.

  • 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 $643). 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 Saint Thomas Island?

Book flights to Saint Thomas Island 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.
Newark to Saint Thomas Island flights
John F Kennedy Intl 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
John F Kennedy Intl to Christiansted flights
Newark to Christiansted flights
Pittsburgh to Saint Thomas Island flights
LaGuardia to Christiansted flights
Reagan-National to Christiansted flights
Dulles Intl to Christiansted flights
Philadelphia to Christiansted flights
Allentown to Saint Thomas Island flights
Harrisburg to Saint Thomas Island flights
Pittsburgh to Christiansted flights
Scranton to Saint Thomas Island flights
Allentown to Christiansted flights
Latrobe to Saint Thomas Island flights
State College to Saint Thomas Island flights
Scranton 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$209FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$227Average$373FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$435Average$679FlexibilityNo cancel feeOn-time71%
DeltaCheapest$487Average$753FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$527Average$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.