$93 Cheap Flights from St. Thomas (STT) to Philadelphia (PHL)

View $93 flight on Mon, Jul 14, 2025Opens in a new window

Popular airlines from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)

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Cheap Flights from St. Thomas to Philadelphia (STT-PHL)

Prices were available within the past 7 days and start at $93 for one-way flights and $215 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Jul 14 - Tue, Jul 22
STT
St. Thomas
PHL
Philadelphia
$215 Roundtrip, found 16 hours ago
$215
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Mon, Jul 14 from St. Thomas to Philadelphia, returning Tue, Jul 22, priced at $215 found 16 hours ago
Frontier Airlines
Fri, Jul 11 - Sat, Aug 30
STT
St. Thomas
PHL
Philadelphia
$228 Roundtrip, found 3 days ago
$228
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Fri, Jul 11 from St. Thomas to Philadelphia, returning Sat, Aug 30, priced at $228 found 3 days ago
Frontier Airlines
Fri, Jul 18 - Mon, Jul 21
STT
St. Thomas
PHL
Philadelphia
$230 Roundtrip, found 23 hours ago
$230
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Fri, Jul 18 from St. Thomas to Philadelphia, returning Mon, Jul 21, priced at $230 found 23 hours ago
Frontier Airlines
Fri, Jul 11 - Mon, Jul 14
STT
St. Thomas
PHL
Philadelphia
$236 Roundtrip, found 18 hours ago
$236
Roundtrip
found 18 hours ago
Select Frontier Airlines flight, departing Fri, Jul 11 from St. Thomas to Philadelphia, returning Mon, Jul 14, priced at $236 found 18 hours ago
Frontier Airlines
Fri, Jul 11 - Wed, Jul 16
STT
St. Thomas
PHL
Philadelphia
$240 Roundtrip, found 3 hours ago
$240
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Fri, Jul 11 from St. Thomas to Philadelphia, returning Wed, Jul 16, priced at $240 found 3 hours ago
Spirit Airlines
Wed, Jul 23 - Wed, Jul 30
STT
St. Thomas
PHL
Philadelphia
$245 Roundtrip, found 3 hours ago
$245
Roundtrip
found 3 hours ago
Select Spirit Airlines flight, departing Wed, Jul 23 from St. Thomas to Philadelphia, returning Wed, Jul 30, priced at $245 found 3 hours ago
Frontier Airlines
Fri, Jul 18 - Fri, Jul 25
STT
St. Thomas
PHL
Philadelphia
$247 Roundtrip, found 4 days ago
$247
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Jul 18 from St. Thomas to Philadelphia, returning Fri, Jul 25, priced at $247 found 4 days ago
American Airlines
Mon, Jul 21 - Tue, Jul 22
STT
St. Thomas
PHL
Philadelphia
$395 Roundtrip, found 23 hours ago
$395
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Mon, Jul 21 from St. Thomas to Philadelphia, returning Tue, Jul 22, priced at $395 found 23 hours ago
JetBlue Airways
Sat, Oct 4 - Thu, Oct 9
STT
St. Thomas
PHL
Philadelphia
$441 Roundtrip, found 6 days ago
$441
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Sat, Oct 4 from St. Thomas to Philadelphia, returning Thu, Oct 9, priced at $441 found 6 days ago
Delta
Tue, Sep 30 - Tue, Oct 7
STT
St. Thomas
PHL
Philadelphia
$579 Roundtrip, found 2 hours ago
$579
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 30 from St. Thomas to Philadelphia, returning Tue, Oct 7, priced at $579 found 2 hours ago

Find the cheapest month to fly from St. Thomas (STT) to Philadelphia (PHL)

September is typically the cheapest month to fly

From $126 - $489 per traveler.

Graph displaying average flight prices per month

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $380
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $380
Flights from St. Thomas (STT) to Philadelphia (PHL)
Origin airport
Cyril E. King
Destination airport
Philadelphia Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Spirit Airlines, United
Roundtrip price
$214
Distance
1609 mi
Average flight time
5 hours 10 mins

St. Thomas to Philadelphia Flights

The cheapest times to fly from St. Thomas to Philadelphia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Thomas to Philadelphia are during the month of July. You can find some of the cheapest flights from St. Thomas to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Thomas to Philadelphia

Sunday is one of the best days to book for cheap flights from St. Thomas to Philadelphia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Thomas to Philadelphia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Thomas to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $93 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Thomas to Philadelphia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Thomas to Philadelphia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL) cost?
You can pick up cheap return flights starting from $1055 from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a American Airlines flight leaving STT on June 28 2025 and touching down at PHL. The price was last updated on June 27 2025 and has not changed since.
What is the cheapest month to fly from STT to PHL?
The cheapest flights from STT to PHL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
Hop on a direct flight with American Airlines and travel straight from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL).
What is the cheapest airline that flies from STT to PHL?
Currently, the cheapest airline offering one-way flights from STT to PHL is American Airlines. You can book a seat on this route from $352. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from STT on August 30 2025. Prices were last updated on June 27 2025 and have not changed since.
How many flights per day from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
On average, there is just 1 nonstop flight taking off from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL) every day. If this doesn't fit your plans, check out flights with layovers. Just customize your search results on Expedia to include one or more stops to find the next best option.
What are the most popular departure times for flights from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
More travelers fly between STT and PHL at 2 PM than at any other point in the day. Rather go when it's quieter? Pick a flight outside the busiest times and it's possible you'll save on your ticket as well.
What day of the week has the most flights from STT to PHL?
If you travel on a Friday, you'll get the biggest range of options for flights from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL).
What is the earliest flight from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
Catch the earliest flight at around 2:09PM UTC-4, departing from Cyril E. King Airport (STT). You'll be in the air for around 4h 30m, touching down at Philadelphia Intl. Airport (PHL) at approximately 5:39PM UTC-5.
How long does it take to fly from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
The average flight time from STT to PHL is 4 hours and 30 minutes, covering a distance of 1,600 mi.
What is the best time to fly from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
Opt for a flight from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Philadelphia from Cyril E. King Airport (STT)?
Browse your flight options from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL). This is the only airport in Philadelphia you can fly into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL) last-minute?
Booking your flight from STT to PHL just before your getaway is generally more expensive. But if you're flexible with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a STT to PHL flight and hotel package?
Opting for a STT to PHL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our extensive range of hotels and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Cyril E. King Airport (STT) to Philadelphia Intl. Airport (PHL)?
If you reserved your STT to PHL flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

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