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Cheap flights from Philadelphia to Saint Thomas Island from $115

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Saint Thomas Island departing on 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Philadelphia to Saint Thomas Island

Cheap round-trip flights

Enter your travel dates to find the best prices.
Spirit Airlines Logo
8:18 am - 3:28 pm
PHL
-
STT
7h 10m
1 stop
Spirit Airlines Logo
4:35 pm - 11:56 pm
STT
-
PHL
7h 21m
1 stop
$269Spirit Airlines
Sat, Mar 21 - Tue, Mar 24
Multiple Airlines Logo
5:15 am - 3:28 pm
PHL
-
STT
10h 13m
1 stop
Multiple Airlines Logo
2:36 pm - 11:37 am
STT
-
PHL
21h 01m
1 stop
$270Multiple Airlines
Sun, Mar 22 - Tue, Mar 24
Multiple Airlines Logo
10:38 pm - 9:54 am
PHL
-
STT
11h 16m
1 stop
Multiple Airlines Logo
12:25 pm - 11:10 pm
STT
-
PHL
10h 45m
1 stop
$273Multiple Airlines
Fri, May 1 - Wed, May 6
Spirit Airlines Logo
6:12 pm - 11:30 am
PHL
-
STT
17h 18m
1 stop
Spirit Airlines Logo
5:10 pm - 11:37 pm
STT
-
PHL
6h 27m
1 stop
$274Spirit Airlines
Sat, Apr 25 - Sat, May 2
Multiple Airlines Logo
10:38 pm - 9:54 am
PHL
-
STT
11h 16m
1 stop
Multiple Airlines Logo
5:10 pm - 9:49 am
STT
-
PHL
16h 39m
1 stop
$276Multiple Airlines
Fri, May 1 - Mon, May 11
Multiple Airlines Logo
10:33 pm - 1:26 pm
PHL
-
STT
14h 53m
1 stop
Multiple Airlines Logo
2:36 pm - 3:10 pm
STT
-
PHL
24h 34m
1 stop
$277Multiple Airlines
Tue, Mar 24 - Mon, Mar 30
Multiple Airlines Logo
7:56 pm - 9:54 am
PHL
-
STT
13h 58m
1 stop
Multiple Airlines Logo
12:25 pm - 9:49 am
STT
-
PHL
21h 24m
1 stop
$278Multiple Airlines
Tue, May 19 - Tue, May 26
Spirit Airlines Logo
5:00 am - 3:28 pm
PHL
-
STT
10h 28m
2 stops
Spirit Airlines Logo
4:35 pm - 4:26 pm
STT
-
PHL
23h 51m
2 stops
$279Spirit Airlines
Tue, Mar 24 - Tue, Mar 31
Multiple Airlines Logo
3:20 pm - 11:30 am
PHL
-
STT
20h 10m
1 stop
Multiple Airlines Logo
12:25 pm - 11:10 pm
STT
-
PHL
10h 45m
1 stop
$280Multiple Airlines
Sun, May 3 - Thu, May 7
Spirit Airlines Logo
8:18 am - 3:28 pm
PHL
-
STT
7h 10m
1 stop
Spirit Airlines Logo
4:35 pm - 11:56 pm
STT
-
PHL
7h 21m
1 stop
$281Spirit Airlines
Tue, Mar 24 - Sat, Mar 28

Spirit Airlines flights from Philadelphia to Saint Thomas Island

Our best Spirit Airlines deals on Philadelphia to Saint Thomas Island flight tickets
Spirit Airlines
Mar 21
PHL8:18 amPhiladelphia
7h 10m
1 stop
STT3:28 pmSaint Thomas Island Cyril E King
Mar 24
STT4:35 pmSaint Thomas Island Cyril E King
7h 21m
1 stop
PHL11:56 pmPhiladelphia
$269
Spirit Airlines
Apr 25
PHL6:12 pmPhiladelphia
17h 18m
1 stop
STT11:30 amSaint Thomas Island Cyril E King
May 2
STT5:10 pmSaint Thomas Island Cyril E King
6h 27m
1 stop
PHL11:37 pmPhiladelphia
$274
Spirit Airlines
Mar 24
PHL5:00 amPhiladelphia
10h 28m
2 stops
STT3:28 pmSaint Thomas Island Cyril E King
Mar 31
STT4:35 pmSaint Thomas Island Cyril E King
23h 51m
2 stops
PHL4:26 pmPhiladelphia
$279

momondo 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, momondo users made 832,500 searches. Data last updated March 5, 2026.
Use the filters below to find and compare flights from Philadelphia to Saint Thomas Island that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sat 3/21

8:18 am-3:28 pm

1 stop7h 10m

Saint Thomas Island Cyril E King

Tue 3/24

4:35 pm-11:56 pm

1 stop7h 21m

$269

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sun 3/22

5:15 am-3:28 pm

1 stop10h 13m

Saint Thomas Island Cyril E King

Tue 3/24

2:36 pm-11:37 am

1 stop21h 01m

$270

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Fri 5/1

10:38 pm-9:54 am

1 stop11h 16m

Saint Thomas Island Cyril E King

Wed 5/6

12:25 pm-11:10 pm

1 stop10h 45m

$273

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sat 4/25

6:12 pm-11:30 am

1 stop17h 18m

Saint Thomas Island Cyril E King

Sat 5/2

5:10 pm-11:37 pm

1 stop6h 27m

$274

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Fri 5/1

10:38 pm-9:54 am

1 stop11h 16m

Saint Thomas Island Cyril E King

Mon 5/11

5:10 pm-9:49 am

1 stop16h 39m

$276

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 3/24

10:33 pm-1:26 pm

1 stop14h 53m

Saint Thomas Island Cyril E King

Mon 3/30

2:36 pm-3:10 pm

1 stop24h 34m

$277

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 5/19

7:56 pm-9:54 am

1 stop13h 58m

Saint Thomas Island Cyril E King

Tue 5/26

12:25 pm-9:49 am

1 stop21h 24m

$278

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 3/24

5:00 am-3:28 pm

2 stops10h 28m

Saint Thomas Island Cyril E King

Tue 3/31

4:35 pm-4:26 pm

2 stops23h 51m

$279

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Sun 5/3

3:20 pm-11:30 am

1 stop20h 10m

Saint Thomas Island Cyril E King

Thu 5/7

12:25 pm-11:10 pm

1 stop10h 45m

$280

PhiladelphiaSaint Thomas Island

PHL - STT

PHLSTT

Philadelphia

Tue 3/24

8:18 am-3:28 pm

1 stop7h 10m

Saint Thomas Island Cyril E King

Sat 3/28

4:35 pm-11:56 pm

1 stop7h 21m

$281

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Saint Thomas Island from

How to get the cheapest flight ticket from Philadelphia to Saint Thomas Island

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Saint Thomas Island?

The month of September is another great option to travel to Saint Thomas Island, with average flight prices from Philadelphia averaging around $534.

What is the cheapest day to depart on your flight to Saint Thomas Island?

On average, the least expensive day to fly to Saint Thomas Island from Philadelphia is on a Thursday. momondo users have found tickets for Thursday departures for as low as $674. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to Saint Thomas Island for around $905.

What is the cheapest Philadelphia to Saint Thomas Island Cyril E King flight route?

Fly from Philadelphia to Saint Thomas Island Cyril E King for the best Philadelphia - Saint Thomas Island Cyril E King flight prices

How far in advance should I book a flight to Saint Thomas Island?

You are more likely to see cheaper flights to Saint Thomas Island from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Saint Thomas Island for around $637 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Saint Thomas Island from Philadelphia for as low as $512 on momondo.

What cabin class options are available on Philadelphia to Saint Thomas Island Cyril E King flights?

There is only 1 cabin class available to choose from on Philadelphia to Saint Thomas Island Cyril E King flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Philadelphia to Saint Thomas Island flights?

You could potentially save up to 70% on your flight if you consider stops on a Philadelphia to Saint Thomas Island flight.

How have Philadelphia to Saint Thomas Island flight prices changed over time?

As of March 2026, prices for Philadelphia to Saint Thomas Island flights are approximately 9% more expensive when compared to flights at the same time last year.

When to book flights from Philadelphia to Saint Thomas Island

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Saint Thomas Island according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to Saint Thomas Island (PHL to STT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Saint Thomas Island

Best Price Found

$584

Fastest flight time

5h 45m

Direct flights

Every day

Airports in Saint Thomas Island

1 airport
The best one-way flight to Saint Thomas Island from Philadelphia in the past 72 hours is $584. The best round-trip flight deal from Philadelphia to Saint Thomas Island found on momondo in the last 72 hours is $721.
The fastest flight from Philadelphia to Saint Thomas Island takes 5h 45m
Direct flights go from Philadelphia to Saint Thomas Island every day.
There is 1 airport in Saint Thomas Island. From Philadelphia there are direct flights to Saint Thomas Island Cyril E King (STT).
Search flight deals

  • How far is Philadelphia to Saint Thomas Island Cyril E King by plane?

    Philadelphia and Saint Thomas Island Cyril E King are 1611.8 mi apart from one another. Typically, this will take 5h 45m by plane in normal conditions.

  • When did momondo last update prices for flights from Philadelphia Airport to Saint Thomas Island Cyril E King Airport?

    Prices for flights from Philadelphia Airport to Saint Thomas Island Cyril E King Airport were last updated today.

  • How many operators does momondo search for flights from Philadelphia Airport to Saint Thomas Island Cyril E King Airport?

  • How old do you have to be to fly from Philadelphia Airport to Saint Thomas Island Cyril E King Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Saint Thomas Island Cyril E King Airport.

  • What documentation or ID do you need to fly to Saint Thomas Island Cyril E King Airport?

    The travel and health documents required for your trip to Saint Thomas Island Cyril E King Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Saint Thomas Island Cyril E King Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Philadelphia to Saint Thomas Island?

  • What is the most popular airline from Philadelphia to Saint Thomas Island?

Best airlines flying from Philadelphia to Saint Thomas Island

Compare and see reviews for airlines that fly from Philadelphia to Saint Thomas Island with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $172Free CancellationRating
5.7
3,041 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $232Free CancellationRating
6.3
8,494 reviews
Search Spirit Airlines flights
JetBluePriceFrom $284Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
DeltaPriceFrom $308Free CancellationRating
7.9
8,250 reviews
Search Delta flights
United AirlinesPriceFrom $493Free CancellationRating
7.4
9,388 reviews
Search United Airlines flights
American AirlinesPriceFrom $553Free CancellationRating
7.1
11,382 reviews
Search American Airlines flights

  • American Airlines Flights From Philadelphia to Saint Thomas Island

    American Airlines is one of the most popular airlines flying from Philadelphia to Saint Thomas Island, operating 2 flights/week on average for this route. A good American Airlines flight deal for Philadelphia to Saint Thomas Island starts from $553 round-trip, up to an average price of $774. Our users have rated American Airlines at 7.1/10.

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

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Saint Thomas Island?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Saint Thomas Island. momondo saves you time and could save you money on your trip.

Can I find flights from Philadelphia to Saint Thomas Island with flexible booking policies on momondo?

All flight searches from Philadelphia to Saint Thomas Island on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Philadelphia to Saint Thomas Island?

Once all potential Philadelphia to Saint Thomas Island flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Philadelphia to Saint Thomas Island right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Philadelphia to Saint Thomas Island now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Saint Thomas Island and let you know when they change.

An easier way to manage your Saint Thomas Island trip

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