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San Juan

$87+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SJU
Feb 12 — Feb 191
Thu 2/12
Thu 2/19
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 January 13, 2026.

Round-trip from

$174
(Frontier)

One-way from

$87
(Super.com)

Popular in

September

Cheapest in

January

Average price

$71
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. 18% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 13, 2026.

This Frontier deal was found by Cheapflights users on 1/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/33:21 pm
TTN
-
SJU
1 stop7h 38m
Frontier
Wed 2/255:25 pm
SJU
-
TTN
1 stop7h 14m
Frontier
Deal found 1/12$174
This Frontier deal was found by Cheapflights users on 1/10. 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.
Sat 3/218:55 am
TTN
-
SJU
1 stop10h 11m
Frontier
Wed 3/2510:04 am
SJU
-
TTN
1 stop13h 55m
Frontier
Deal found 1/10$176
This Frontier deal was found by Cheapflights users on 1/11. 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.
Wed 2/43:21 pm
TTN
-
SJU
1 stop7h 38m
Frontier
Thu 2/58:00 am
SJU
-
TTN
1 stop12h 48m
Frontier
Deal found 1/11$177
This Frontier deal was found by Cheapflights users on 1/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/33:21 pm
TTN
-
SJU
1 stop7h 38m
Frontier
Tue 3/311:07 am
SJU
-
TTN
1 stop13h 32m
Frontier
Deal found 1/12$178
This CheapOair deal was found by Cheapflights users on 1/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/78:19 pm
TTN
-
SJU
1 stop27h 49m
Frontier
Sat 2/147:54 pm
SJU
-
TTN
1 stop28h 45m
Frontier
Deal found 1/11$179
This CheapOair deal was found by Cheapflights users on 1/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/45:13 pm
TTN
-
SJU
1 stop6h 41m
Frontier
Wed 4/85:09 pm
SJU
-
TTN
1 stop6h 50m
Frontier
Deal found 1/12$180
This Frontier deal was found by Cheapflights users on 1/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/3112:04 pm
TTN
-
SJU
1 stop10h 55m
Frontier
Thu 2/58:00 am
SJU
-
TTN
1 stop12h 48m
Frontier
Deal found 1/12$182
This CheapOair deal was found by Cheapflights users on 1/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:10 am
TTN
-
SJU
1 stop19h 40m
Frontier
Mon 4/135:09 pm
SJU
-
TTN
1 stop6h 50m
Frontier
Deal found 1/12$183
This Flightnetwork deal was found by Cheapflights users on 1/12. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/28:27 pm
TTN
-
SJU
1 stop26h 32m
Frontier
Tue 2/105:25 pm
SJU
-
TTN
1 stop7h 14m
Frontier
Deal found 1/12$193
This Frontier deal was found by Cheapflights users on 1/11. 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.
Sat 1/2412:04 pm
TTN
-
SJU
1 stop10h 55m
Frontier
Wed 1/288:00 am
SJU
-
TTN
1 stop7h 26m
Frontier
Deal found 1/11$195
This Frontier deal was found by Cheapflights users on 1/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:59 pm
TTN
-
SJU
1 stop10h 59m
Frontier
Tue 3/1711:07 am
SJU
-
TTN
1 stop12h 52m
Frontier
Deal found 1/12$198
This Frontier deal was found by Cheapflights users on 1/11. 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.
Sat 2/218:00 am
TTN
-
SJU
1 stop9h 59m
Frontier
Wed 2/255:25 pm
SJU
-
TTN
1 stop7h 14m
Frontier
Deal found 1/11$199

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 January 13, 2026.
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

Tue 2/3

3:21 pm-11:59 pm

1 stop7h 38m

San Juan Luis Munoz Marin Intl

Wed 2/25

5:25 pm-11:39 pm

1 stop7h 14m

$174

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 3/21

8:55 am-7:06 pm

1 stop10h 11m

San Juan Luis Munoz Marin Intl

Wed 3/25

10:04 am-11:59 pm

1 stop13h 55m

$176

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 1/31

8:19 pm-9:54 am

1 stop12h 35m

San Juan Luis Munoz Marin Intl

Sat 2/7

8:00 am-7:24 pm

1 stop12h 24m

$178

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Tue 2/24

8:00 am-12:43 am

1 stop15h 43m

San Juan Luis Munoz Marin Intl

Tue 3/3

11:07 am-11:39 pm

1 stop13h 32m

$178

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Tue 2/3

3:21 pm-11:59 pm

1 stop7h 38m

San Juan Luis Munoz Marin Intl

Tue 3/3

11:07 am-11:39 pm

1 stop13h 32m

$178

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Thu 1/29

8:38 pm-10:24 am

1 stop12h 46m

San Juan Luis Munoz Marin Intl

Wed 2/25

5:25 pm-11:39 pm

1 stop7h 14m

$178

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 1/31

12:04 pm-11:59 pm

1 stop10h 55m

San Juan Luis Munoz Marin Intl

Wed 2/25

5:25 pm-11:39 pm

1 stop7h 14m

$178

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 4/4

5:13 pm-11:54 pm

1 stop6h 41m

San Juan Luis Munoz Marin Intl

Thu 4/9

11:30 am-11:59 pm

1 stop12h 29m

$179

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 1/31

12:04 pm-11:59 pm

1 stop10h 55m

San Juan Luis Munoz Marin Intl

Tue 3/3

11:07 am-11:39 pm

1 stop13h 32m

$182

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 1/31

12:04 pm-11:59 pm

1 stop10h 55m

San Juan Luis Munoz Marin Intl

Thu 2/26

5:25 pm-11:39 pm

1 stop7h 14m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

Showing 1-10 of 21 results
1
2
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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, March is the cheapest month in which you can book a flight from Trenton, New Jersey to San Juan (average of $62). Flying from Trenton, New Jersey to San Juan in August is currently the most expensive (average of $138). 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.

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 January 13, 2026.
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
5.7
Fair
3,056 reviews

Overall

5.7

Food

4.6

Boarding

6.0

Comfort

5.5

Crew

6.6

Entertainment

4.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

ATL - MDW

Flight was canceled. Late notification and limited help with booking another flight.
Frontier
5.7
Fair
3,056 reviews
Frontier
5.7
Fair
3,056 reviews

Overall

5.7

Food

4.6

Boarding

6.0

Comfort

5.5

Crew

6.6

Entertainment

4.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

ATL - MDW

Flight was canceled. Late notification and limited help with booking another flight.

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 7h 38m. 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 $143. Users have found that Frontier is 43% 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, March is the cheapest month in which you can book a flight from Trenton, New Jersey to San Juan (average of $62). Flying from Trenton, New Jersey to San Juan in August is currently the most expensive (average of $138). 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 January 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$198Average$356FlexibilityNo cancel feeOn-time62%

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