What are the cheapest airlines flying from Saint Thomas Island to San Juan round-trip?

According to our current data, Frontier ($97), JetBlue ($109), and Spirit Airlines ($293) offers the cheapest pricing from Saint Thomas Island to San Juan. You may be able to fly from Saint Thomas Island to San Juan for 4% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Saint Thomas Island to San Juan one-way?

The cheapest airlines for a one-way flight from Saint Thomas Island to San Juan are Frontier ($47), JetBlue ($65), and Cape Air ($129).

What is the cheapest day to fly from Saint Thomas Island to San Juan?

Travelers seeking maximum savings on their Saint Thomas Island to San Juan flight should consider departing on Friday at noon when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Juan ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the cheapest flights from Saint Thomas Island to San Juan?

On average you can expect to pay $178 for a flight from Saint Thomas Island to San Juan. The cheapest flight overall is $61 while the most popular route, (Saint Thomas Island Cyril E King - San Juan Luis Munoz Marin Intl) is currently priced at $109.

What are the most reliable airlines from Saint Thomas Island to San Juan?

Before booking your flight to San Juan from Saint Thomas Island, check out the most reliable airlines to get you to your destination on time: Qatar Airways (100%), Silver Airways (85%), United Airlines( 69%).

What are the most popular airlines that fly from Saint Thomas Island to San Juan?

Before booking your flight from Saint Thomas Island to San Juan check out the most popular airlines for this route: Silver Airways, Cape Air or JetBlue.

What is the cheapest day to fly round-trip from Saint Thomas Island to San Juan?

Flights from Saint Thomas Island to San Juan are found to be more expensive on Monday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to San Juan.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 24 days in advance, which can save you up to 137% on flights from Saint Thomas Island to San Juan compared to booking the week you need them. Waiting 24 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $77. For sooner than that we have options available in the next 3 days from $128.

What is the cheapest month to fly from Saint Thomas Island to San Juan?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, November can be a great choice for travel to San Juan. Flights to San Juan from Saint Thomas Island in November are about $101 on average during November, but can be found for as low as $33.

What airport do you fly from for flights from Saint Thomas Island to San Juan?

Most people fly from Saint Thomas Island Cyril E King (STT) if they book a flight from Saint Thomas Island to San Juan. On average, Cyril E King has 16 outbound flights to San Juan per day from 5 airlines. Saint Thomas Island Cyril E King is conveniently located just 2.8 mi from Saint Thomas Island’s city center.

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

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

How can I find direct flights from Saint Thomas Island to San Juan?

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

Can I find deals for business class flights from Saint Thomas Island to San Juan?

Yes. Cheapflights offers flight deals from Saint Thomas Island to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$47+ Flights from Saint Thomas Island to San Juan

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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”

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Cheapflights Tip: The best prices from Saint Thomas Island Cyril E King to San Juan are usually found in November or September, booked 23 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from Saint Thomas Island to San Juan

Round-trip from	$97 (Priceline)
One-way from	$47 (Frontier)
Popular in	June
Cheapest in	November
Average price	$89

From Saint Thomas Island Cyril E King to San Juan

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One-way flight from Saint Thomas Island Cyril E King to San Juan

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($24 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Saint Thomas Island to San Juan

Cheapest flights from Saint Thomas Island to San Juan
Explore the most affordable flight options available from Saint Thomas Island to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

Fri 7/185:14 pmSTT - SJU

Nonstop0h 54mFrontier

Mon 7/213:37 pmSJU - STT

Nonstop0h 52mFrontier

Deal found 6/30

$97

Wed 8/62:23 pmSTT - SJU

Nonstop0h 47mJetBlue

Mon 8/1112:50 pmSJU - STT

Nonstop0h 38mJetBlue

Deal found 6/30

$109

Fri 7/185:14 pmSTT - SJU

Nonstop0h 54mMultiple Airlines

Sun 7/203:35 pmSJU - STT

Nonstop0h 35mMultiple Airlines

Deal found 7/1

$171

Best flights from Saint Thomas Island to San Juan
Discover carefully curated flight deals from Saint Thomas Island to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 2, 2025.

Fri 7/185:14 pmSTT - SJU

Nonstop0h 54mFrontier

Mon 7/213:37 pmSJU - STT

Nonstop0h 52mFrontier

Deal found 6/30

$97

Wed 8/62:23 pmSTT - SJU

Nonstop0h 47mJetBlue

Mon 8/1112:50 pmSJU - STT

Nonstop0h 38mJetBlue

Deal found 6/30

$109

Fri 7/185:14 pmSTT - SJU

Nonstop0h 54mMultiple Airlines

Sun 7/203:35 pmSJU - STT

Nonstop0h 35mMultiple Airlines

Deal found 7/1

$171

Fri 7/181:25 pmSTT - SJU

1 stop12h 10mSpirit Airlines

Sat 8/99:01 pmSJU - STT

1 stop15h 29mSpirit Airlines

Deal found 7/1

$293

Last-minute flights from Saint Thomas Island to San Juan
Discover last-minute flight deals from Saint Thomas Island to San Juan. Data last updated July 2, 2025 and is based on user searches.

Mon 7/77:00 amSTT - SJU

2 stops8h 09mCape Air

Wed 7/911:55 amSJU - STT

Nonstop0h 35mCape Air

Deal found 6/30

$464

Tue 7/83:03 pmSTT - SJU

1 stop10h 28mSpirit Airlines

Thu 7/1010:14 pmSJU - STT

1 stop11h 34mSpirit Airlines

Deal found 6/30

$383

Wed 7/92:23 pmSTT - SJU

Nonstop0h 47mJetBlue

Wed 7/1612:50 pmSJU - STT

Nonstop0h 38mJetBlue

Deal found 7/2

$164

Fri 7/115:14 pmSTT - SJU

Nonstop0h 54mFrontier

Mon 7/143:37 pmSJU - STT

Nonstop0h 52mFrontier

Deal found 7/1

$107

Fri 7/115:14 pmSTT - SJU

Nonstop0h 54mMultiple Airlines

Sun 7/1311:15 amSJU - STT

Nonstop0h 35mMultiple Airlines

Deal found 6/30

$173

Fri 7/185:14 pmSTT - SJU

Nonstop0h 54mFrontier

Mon 7/213:37 pmSJU - STT

Nonstop0h 52mFrontier

Deal found 6/30

$97

Fri 7/185:14 pmSTT - SJU

Nonstop0h 54mMultiple Airlines

Sun 7/203:35 pmSJU - STT

Nonstop0h 35mMultiple Airlines

Deal found 7/1

$171

Wed 8/62:23 pmSTT - SJU

Nonstop0h 47mJetBlue

Mon 8/1112:50 pmSJU - STT

Nonstop0h 38mJetBlue

Deal found 6/30

$109

One-way flights from Saint Thomas Island to San Juan
Search for one-way flight options from Saint Thomas Island to San Juan. Find affordable one-way fares based on user searches. Data last updated July 2, 2025.

Mon 8/45:14 pmSTT - SJU

Nonstop0h 54mFrontier

Deal found 6/30

$47

Tue 7/152:23 pmSTT - SJU

Nonstop0h 47mJetBlue

Deal found 6/30

$65

Tue 8/512:54 pmSTT - SJU

Nonstop0h 35mCape Air

Deal found 7/1

$129

Mon 8/410:43 amSTT - SJU

1 stop10h 26mSpirit Airlines

Deal found 6/30

$134

Wed 7/305:05 pmSTT - SJU

1 stop16h 15mSilver Airways

Deal found 6/30

$143

Fri 8/159:00 amSTT - SJU

1 stop6h 10mMultiple Airlines

Deal found 6/30

$163

Cheapflights Fare Finder

Use the filters below to find and compare flights from Saint Thomas Island to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Fri 7/18

5:14 pm-6:08 pm

Nonstop0h 54m

San Juan Luis Munoz Marin Intl

Mon 7/21

3:37 pm-4:29 pm

Nonstop0h 52m

$97

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Wed 8/6

2:23 pm-3:10 pm

Nonstop0h 47m

San Juan Luis Munoz Marin Intl

Mon 8/11

12:50 pm-1:28 pm

Nonstop0h 38m

$109

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Fri 7/18

5:14 pm-6:08 pm

Nonstop0h 54m

San Juan Luis Munoz Marin Intl

Sun 7/20

3:35 pm-4:10 pm

Nonstop0h 35m

$171

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Fri 7/18

1:25 pm-1:35 am

1 stop12h 10m

San Juan Luis Munoz Marin Intl

Sat 8/9

9:01 pm-12:30 pm

1 stop15h 29m

$293

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Mon 8/4

5:14 pm-6:08 pm

Nonstop0h 54m

$47

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Tue 7/15

2:23 pm-3:10 pm

Nonstop0h 47m

$65

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Tue 8/5

12:54 pm-1:29 pm

Nonstop0h 35m

$129

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Mon 8/4

10:43 am-9:09 pm

1 stop10h 26m

$134

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Wed 7/30

5:05 pm-9:20 am

1 stop16h 15m

$143

Saint Thomas IslandSan Juan

STT - SJU

STTSJU

Saint Thomas Island Cyril E King

Fri 8/15

9:00 am-3:10 pm

1 stop6h 10m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Saint Thomas Island to San Juan

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

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

Booking 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from Saint Thomas Island to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, September is the cheapest month in which you can book a flight from Saint Thomas Island to San Juan (average of $254). Flying from Saint Thomas Island to San Juan in June is currently the most expensive (average of $339). 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 STT to SJU?

Unlike in the morning, when flights are generally more expensive, you can save up to 34% on flights from Saint Thomas Island to San Juan by exploring options for tickets at noon.

Weekly flight availability from Saint Thomas Island to San Juan

The most flights from STT to PR1 are scheduled on a Monday (21 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (14 on average).

How much does it cost to fly round-trip from Saint Thomas Island to San Juan?

Reviews of airlines servicing San Juan

Read reviews from past customers who have flown JetBlue, Spirit Airlines, and Frontier from Saint Thomas Island to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

JetBlue

7.3

Good

2,918 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

JetBlue

7.3

Good

2,918 reviews

JetBlue

7.3

Good

2,918 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Spirit Airlines

6.3

Okay

8,103 reviews

JetBlue

7.3

Good

2,918 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Frontier

5.9

Fair

3,286 reviews

JetBlue

7.3

Good

2,918 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Silver Airways

5.9

Fair

252 reviews

JetBlue

7.3

Good

2,918 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Related info for your journey

What airport do you fly from for flights from Saint Thomas Island to San Juan?
Most people fly from Saint Thomas Island Cyril E King (STT) if they book a flight from Saint Thomas Island to San Juan. On average, Cyril E King has 16 outbound flights to San Juan per day from 5 airlines. Saint Thomas Island Cyril E King is conveniently located just 2.8 mi from Saint Thomas Island’s city center.
What are the cheapest airlines flying from Saint Thomas Island to San Juan round-trip?
According to our current data, Frontier ($97), JetBlue ($109), and Spirit Airlines ($293) offers the cheapest pricing from Saint Thomas Island to San Juan. You may be able to fly from Saint Thomas Island to San Juan for 4% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Saint Thomas Island to San Juan one-way?
The cheapest airlines for a one-way flight from Saint Thomas Island to San Juan are Frontier ($47), JetBlue ($65), and Cape Air ($129).
What are the most reliable airlines from Saint Thomas Island to San Juan?
Before booking your flight to San Juan from Saint Thomas Island, check out the most reliable airlines to get you to your destination on time: Qatar Airways (100%), Silver Airways (85%), United Airlines( 69%).
What are the cheapest flights from Saint Thomas Island to San Juan?
On average you can expect to pay $178 for a flight from Saint Thomas Island to San Juan. The cheapest flight overall is $61 while the most popular route, (Saint Thomas Island Cyril E King - San Juan Luis Munoz Marin Intl) is currently priced at $109.
Can I find deals for flights from Saint Thomas Island to San Juan that include hotel bookings?
Yes. In addition to deals on Saint Thomas Island to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Saint Thomas Island to San Juan?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Saint Thomas Island to San Juan.
Can I find deals for business class flights from Saint Thomas Island to San Juan?
Yes. Cheapflights offers flight deals from Saint Thomas Island to San Juan 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 Saint Thomas Island to San Juan?
Currently, September is the cheapest month in which you can book a flight from Saint Thomas Island to San Juan (average of $254). Flying from Saint Thomas Island to San Juan in June is currently the most expensive (average of $339). 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

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Saint Thomas Island to San Juan

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$24	Average$60	FlexibilityNo cancel fee	On-time62%
JetBlue	Cheapest$51	Average$121	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$58	Average$77	FlexibilityNo cancel fee	On-time69%
Silver Airways	Cheapest$64	Average$119	FlexibilityNo cancel fee	On-timeN/A
Cape Air	Cheapest$170	Average$283	FlexibilityNo cancel fee	On-time63%

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$47+ Cheap flights from Saint Thomas Island (STT) to San Juan

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Saint Thomas Island to San Juan with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Saint Thomas Island Cyril E King to San Juan are usually found in November or September, booked 23 days in advance, depart on a Friday or Wednesday and return on a Friday

Cheap flight deals from Saint Thomas Island to San Juan

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Saint Thomas Island to San Juan

Cheapest flights from Saint Thomas Island to San JuanExplore the most affordable flight options available from Saint Thomas Island to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

Explore the most affordable flight options available from Saint Thomas Island to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Saint Thomas Island to San Juan that are best for you.

Best time to book a flight from Saint Thomas Island to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Saint Thomas Island with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Saint Thomas Island to San Juan

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

Use this chart to determine the optimal time to book a round-trip flight from Saint Thomas Island to San Juan. Price data was last updated on June 27, 2025.

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

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

Find hourly flight availability from Saint Thomas Island to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

Weekly flight availability from Saint Thomas Island to San Juan

How much does it cost to fly round-trip from Saint Thomas Island to San Juan?

Reviews of airlines servicing San Juan

Read reviews from past customers who have flown JetBlue, Spirit Airlines, and Frontier from Saint Thomas Island to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What airport do you fly from for flights from Saint Thomas Island to San Juan?

What are the cheapest airlines flying from Saint Thomas Island to San Juan round-trip?

What are the cheapest airlines to fly from Saint Thomas Island to San Juan one-way?

What are the most reliable airlines from Saint Thomas Island to San Juan?

What are the cheapest flights from Saint Thomas Island to San Juan?

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

How can I find direct flights from Saint Thomas Island to San Juan?

Can I find deals for business class flights from Saint Thomas Island to San Juan?

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

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 Saint Thomas Island to San Juan

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Saint Thomas Island to San Juan

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Cheapest flights from Saint Thomas Island to San Juan
Explore the most affordable flight options available from Saint Thomas Island to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.