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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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SJU
Nov 18 — Nov 251
Tue 11/18
Tue 11/25
1 adult, Economy
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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 October 19, 2025.

This Frontier deal was found by Cheapflights users on 10/18. 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.
Thu 10/304:27 pmTTN - SJU
1 stop9h 27mFrontier
Wed 11/53:59 amSJU - TTN
1 stop12h 33mFrontier
Deal found 10/18$252
This Priceline deal was found by Cheapflights users on 10/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:00 amTTN - SJU
1 stop7h 02mFrontier
Sat 10/252:17 pmSJU - TTN
1 stop9h 42mFrontier
Deal found 10/18$262
This Priceline deal was found by Cheapflights users on 10/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:10 amTTN - SJU
1 stop13h 17mFrontier
Tue 12/233:55 amSJU - TTN
1 stop18h 19mFrontier
Deal found 10/18$271
This Frontier deal was found by Cheapflights users on 10/17. 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.
Sun 11/24:06 pmTTN - SJU
1 stop9h 48mFrontier
Mon 11/1012:04 pmSJU - TTN
1 stop12h 55mFrontier
Deal found 10/17$273
This Priceline deal was found by Cheapflights users on 10/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/611:18 amTTN - SJU
1 stop23h 43mFrontier
Sun 11/93:59 amSJU - TTN
1 stop21h 00mFrontier
Deal found 10/18$279
This Frontier deal was found by Cheapflights users on 10/18. 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.
Fri 12/56:10 amTTN - SJU
1 stop8h 49mFrontier
Fri 12/129:15 amSJU - TTN
2 stops15h 44mFrontier
Deal found 10/18$311
This Frontier deal was found by Cheapflights users on 10/19. 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 10/2010:19 amTTN - SJU
1 stop13h 10mFrontier
Mon 10/272:07 pmSJU - TTN
1 stop9h 52mFrontier
Deal found 10/19$313
This Frontier deal was found by Cheapflights users on 10/18. 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.
Sun 11/169:29 pmTTN - SJU
2 stops16h 50mFrontier
Thu 11/207:15 amSJU - TTN
2 stops11h 34mFrontier
Deal found 10/18$315
This Frontier deal was found by Cheapflights users on 10/19. 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.
Sun 11/169:29 pmTTN - SJU
2 stops16h 50mFrontier
Sun 11/233:59 amSJU - TTN
1 stop8h 50mFrontier
Deal found 10/19$327
This Frontier deal was found by Cheapflights users on 10/18. 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.
Sun 11/29:29 pmTTN - SJU
2 stops16h 50mFrontier
Thu 11/1312:29 pmSJU - TTN
1 stop12h 30mFrontier
Deal found 10/18$340
This Frontier deal was found by Cheapflights users on 10/18. 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.
Fri 12/56:10 amTTN - SJU
1 stop8h 49mFrontier
Wed 1/76:00 pmSJU - TTN
1 stop6h 59mFrontier
Deal found 10/18$353
This CheapOair deal was found by Cheapflights users on 10/18. 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 11/2211:14 amTTN - SJU
1 stop10h 55mFrontier
Tue 11/256:10 amSJU - TTN
1 stop29h 09mFrontier
Deal found 10/18$356

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 October 19, 2025.

Round-trip from

$252
(Frontier)

One-way from

$126
(Frontier)

Popular in

December

Cheapest in

March

Average price

$188
From Trenton-Mercer to San Juan
Search Deals
One-way flight from Trenton-Mercer to San Juan
Search Deals
Highest demand for flights based on searches. 30% potential increase in price ($131 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 19, 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

Thu 10/30

4:27 pm-1:54 am

1 stop9h 27m

San Juan Luis Munoz Marin Intl

Sun 11/2

12:29 pm-11:59 pm

1 stop12h 30m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Mon 11/3

6:20 pm-2:54 am

1 stop7h 34m

San Juan Luis Munoz Marin Intl

Wed 11/5

3:59 am-3:32 pm

1 stop12h 33m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Thu 10/30

4:27 pm-1:54 am

1 stop9h 27m

San Juan Luis Munoz Marin Intl

Wed 11/5

3:59 am-3:32 pm

1 stop12h 33m

$252

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 1/3

9:59 pm-8:58 am

1 stop9h 59m

San Juan Luis Munoz Marin Intl

Sat 1/10

12:00 pm-11:59 pm

1 stop12h 59m

$313

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Thu 11/20

6:44 pm-12:32 pm

2 stops16h 48m

San Juan Luis Munoz Marin Intl

Sun 11/23

3:59 am-11:49 am

1 stop8h 50m

$356

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Fri 1/2

9:59 pm-8:54 am

1 stop9h 55m

San Juan Luis Munoz Marin Intl

Mon 1/12

9:37 pm-9:15 pm

1 stop24h 38m

$366

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Wed 12/24

9:59 pm-9:23 am

1 stop10h 24m

San Juan Luis Munoz Marin Intl

Wed 1/21

11:05 am-10:02 pm

1 stop11h 57m

$384

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Sat 11/22

6:44 pm-2:54 am

1 stop7h 10m

San Juan Luis Munoz Marin Intl

Tue 11/25

6:10 am-10:19 am

1 stop29h 09m

$396

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Thu 12/11

6:10 am-3:59 pm

1 stop8h 49m

San Juan Luis Munoz Marin Intl

Sun 12/14

3:55 am-11:59 pm

1 stop21h 04m

$406

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

Fri 12/5

6:10 am-9:55 am

1 stop26h 45m

San Juan Luis Munoz Marin Intl

Sat 12/6

3:55 am-11:59 pm

1 stop21h 04m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 24 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, 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.

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 October 19, 2025.

It’s typically best to fly out from Trenton, New Jersey to San Juan at noon. Doing so could potentially save you 30% on the flight price compared to flying in the afternoon, 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 October 19, 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
3,134 reviews

Comfort

5.5

Overall

5.8

Crew

6.7

Boarding

6.1

Entertainment

4.4

Food

4.6

Reviews

1 / 20
2.0
Mediocre

Shawn,Sep 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip
Frontier
5.8
Fair
3,134 reviews
Frontier
5.8
Fair
3,134 reviews

Comfort

5.5

Overall

5.8

Crew

6.7

Boarding

6.1

Entertainment

4.4

Food

4.6

Reviews

1 / 20
2.0
Mediocre

Shawn,Sep 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip

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 9h 27m. 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 $119. Users have found that Frontier is 59% 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 October 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$280FlexibilityNo cancel feeOn-time62%

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