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$105+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SJU
ago. 2 — ago. 91
sáb. 8/2
sáb. 8/9
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 julio 28, 2025.

Round-trip from

$218
(Frontier)

One-way from

$105
(SmartFares)

Popular in

December

Cheapest in

March

Average price

$280
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 ($181 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 July 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 julio 28, 2025.

This Frontier deal was found by Cheapflights users on 7/27. 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. 9/611:45 amTTN - SJU
1 stop12h 14mFrontier
vie. 9/123:39 amSJU - TTN
1 stop7h 21mFrontier
Deal found 7/27$218

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 julio 28, 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

sáb. 9/6

11:45 am-11:59 pm

1 stop12h 14m

San Juan Luis Munoz Marin Intl

vie. 9/12

3:39 am-11:00 am

1 stop7h 21m

$218

TrentonSan Juan

TTN - SJU

TTNSJU

Trenton-Mercer

mié. 8/13

8:30 am-6:02 pm

1 stop9h 32m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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 julio 28, 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.

How much does it cost to fly round-trip from Trenton, New Jersey to San Juan?

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 julio 28, 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
5.9
Fair
3,238 reviews

Boarding

6.1

Food

4.7

Comfort

5.6

Crew

6.7

Entertainment

4.5

Overall

5.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.
Frontier
5.9
Fair
3,238 reviews
Frontier
5.9
Fair
3,238 reviews

Boarding

6.1

Food

4.7

Comfort

5.6

Crew

6.7

Entertainment

4.5

Overall

5.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.

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.

  • 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 $218. Users have found that Frontier is 20% 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.

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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 julio 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$278FlexibilityNo cancel feeOn-time62%

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