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$126+ Cheap flights from Trenton, NJ (TTN) 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SJU
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Trenton to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Trenton (TTN) to San Juan (PR1). 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 septiembre 11, 2025.

Round-trip from

$252
(CheapOair)

One-way from

$126
(CheapOair)

Popular in

December

Cheapest in

March

Average price

$233
From Trenton-Mercer to San Juan
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One-way flight from Trenton-Mercer to San Juan
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Highest demand for flights based on searches. 39% potential increase in price ($180 potential increase over avg. RT price).
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Cheapest flight prices on average. 20% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Trenton to San Juan

Cheapest flights from Trenton to San Juan
Explore the most affordable flight options available from Trenton to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This CheapOair deal was found by Cheapflights users on 9/10. 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.
vie. 9/1911:45 amTTN - SJU
1 stop14h 49mFrontier
sáb. 9/203:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 9/10$252
This Gotogate deal was found by Cheapflights users on 9/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/184:57 pmTTN - SJU
1 stop7h 02mFrontier
jue. 9/258:00 amSJU - TTN
1 stop28h 15mFrontier
Deal found 9/10$253
This Frontier deal was found by Cheapflights users on 9/11. 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.
vie. 9/2611:45 amTTN - SJU
1 stop12h 14mFrontier
vie. 9/263:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 9/11$257
This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1911:45 amTTN - SJU
1 stop14h 49mFrontier
jue. 9/253:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 9/11$260
This Frontier deal was found by Cheapflights users on 9/11. 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.
sáb. 9/2011:45 amTTN - SJU
1 stop12h 14mFrontier
sáb. 9/273:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 9/11$262
This Frontier deal was found by Cheapflights users on 9/11. 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.
sáb. 9/2711:45 amTTN - SJU
1 stop12h 14mFrontier
sáb. 9/273:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 9/11$265
This CheapOair deal was found by Cheapflights users on 9/10. 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.
vie. 10/3111:08 amTTN - SJU
1 stop27h 34mFrontier
mié. 11/512:29 pmSJU - TTN
1 stop28h 03mFrontier
Deal found 9/10$268
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/234:25 pmTTN - SJU
1 stop10h 05mFrontier
dom. 10/265:54 pmSJU - TTN
1 stop15h 30mFrontier
Deal found 9/10$269
This Booking.com deal was found by Cheapflights users on 9/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/99:00 amTTN - SJU
1 stop6h 32mFrontier
sáb. 10/113:40 amSJU - TTN
1 stop6h 34mFrontier
Deal found 9/8$270
This Frontier deal was found by Cheapflights users on 9/10. 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.
jue. 9/1810:30 amTTN - SJU
2 stops16h 04mFrontier
sáb. 9/203:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 9/10$277

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trenton to San Juan 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Trenton to San Juan that are best for you.

Fly from

Trenton

Fly to

San Juan

Route

Depart

Return

Price

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

lun. 9/29

11:45 am-2:34 am

1 stop14h 49m

San Juan Luis Munoz Marin Intl

dom. 10/5

8:00 am-12:15 pm

1 stop28h 15m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

vie. 9/26

11:45 am-11:59 pm

1 stop12h 14m

San Juan Luis Munoz Marin Intl

sáb. 9/27

3:39 am-11:00 am

1 stop7h 21m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

vie. 9/19

1:15 pm-3:22 pm

1 stop26h 07m

San Juan Luis Munoz Marin Intl

dom. 9/21

8:00 am-12:15 pm

1 stop28h 15m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

jue. 10/30

4:27 pm-1:54 am

1 stop9h 27m

San Juan Luis Munoz Marin Intl

mié. 11/5

12:29 pm-3:32 pm

1 stop28h 03m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

lun. 9/22

11:45 am-2:34 am

1 stop14h 49m

San Juan Luis Munoz Marin Intl

jue. 9/25

8:00 am-12:15 pm

1 stop28h 15m

$255

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

jue. 9/18

4:57 pm-11:59 pm

1 stop7h 02m

San Juan Luis Munoz Marin Intl

jue. 9/25

8:00 am-12:15 pm

1 stop28h 15m

$255

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

sáb. 9/20

11:45 am-11:59 pm

1 stop12h 14m

San Juan Luis Munoz Marin Intl

sáb. 9/20

3:39 am-11:00 am

1 stop7h 21m

$255

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

jue. 10/30

4:27 pm-9:24 pm

1 stop28h 57m

San Juan Luis Munoz Marin Intl

dom. 11/2

10:39 pm-5:35 pm

1 stop19h 56m

$255

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

sáb. 10/18

8:00 am-2:30 am

1 stop18h 30m

San Juan Luis Munoz Marin Intl

dom. 11/2

7:30 am-10:13 am

1 stop27h 43m

$255

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

sáb. 9/20

11:45 am-11:59 pm

1 stop12h 14m

San Juan Luis Munoz Marin Intl

sáb. 9/27

3:39 am-11:00 am

1 stop7h 21m

$262

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 21 results
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Best time to book a flight from Trenton to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Trenton 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 Trenton to San Juan

What is the cheapest month to book a flight from Trenton, New Jersey to San Juan?

Currently, September is the cheapest month in which you can book a flight from Trenton, New Jersey to San Juan (average of $254). Flying from Trenton, New Jersey 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 TTN to SJU?

Find hourly flight availability from Trenton 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 septiembre 11, 2025.

It’s typically best to fly out from Trenton, New Jersey to San Juan in the afternoon. Doing so could potentially save you 16% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated septiembre 11, 2025.
Get a feel of what it's like to fly with Frontier from Trenton to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.8
Fair
3,177 reviews

Food

4.7

Boarding

6.1

Overall

5.8

Entertainment

4.4

Crew

6.7

Comfort

5.5

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

MCO - DFW

Frontier likes to promote themselves as being a cheap airline to fly, but in the end, that’s laughable. Only AFTER I booked through you, and then had to go to their site to choose my seats and baggage, did I find they charged a $75 “Passenger” fee. No explanation on what that was even for. Then for them to charge $5 for sodas, and who knows what for any small snack, is just insulting.
Frontier
5.8
Fair
3,177 reviews
Frontier
5.8
Fair
3,177 reviews

Food

4.7

Boarding

6.1

Overall

5.8

Entertainment

4.4

Crew

6.7

Comfort

5.5

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

MCO - DFW

Frontier likes to promote themselves as being a cheap airline to fly, but in the end, that’s laughable. Only AFTER I booked through you, and then had to go to their site to choose my seats and baggage, did I find they charged a $75 “Passenger” fee. No explanation on what that was even for. Then for them to charge $5 for sodas, and who knows what for any small snack, is just insulting.

Related info for your journey

Find useful and relevant information for your journey from Trenton 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 Trenton to San Juan?

    Trenton-Mercer (TTN), located 4.8 mi from the city center, is the airport you fly out of when you book flights from Trenton to San Juan. 1 airline have flights from Trenton-Mercer to San Juan on a regular basis. Booking flights from Trenton-Mercer to San Juan should not be difficult; the airport handles an average of 0 outbound flights to San Juan per day.

  • How long is the flight from Trenton, New Jersey to San Juan?

    Departing from Trenton, New Jersey to San Juan will take you 14h 49m. There are 1596 mi between Trenton, New Jersey and San Juan.

  • What is the cheapest airline to fly from Trenton, New Jersey to San Juan round-trip?

    Cheapflights users have booked flights from Trenton, New Jersey to San Juan round-trip from $117. Users have found that Frontier is 57% cheaper than the other options available to this destination.

  • Can I find deals for flights from Trenton to San Juan that include hotel bookings?

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

  • How can I find direct flights from Trenton to San Juan?

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

  • Can I find deals for business class flights from Trenton to San Juan?

    Yes. Cheapflights offers flight deals from Trenton 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 Trenton, New Jersey to San Juan?

    Currently, September is the cheapest month in which you can book a flight from Trenton, New Jersey to San Juan (average of $254). Flying from Trenton, New Jersey 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

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Alternative routes for Trenton to San Juan

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Top airline flying from Trenton to San Juan

Discover the top airline that operate flights from Trenton to San Juan. 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$117Average$278FlexibilityNo cancel feeOn-time62%

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