TTN - SJU

$146 Find Cheap Flights from Trenton to San Juan - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Trenton to San Juan departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Trenton to San Juan, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Trenton to San Juan, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$336
Frontier
Wed 8/26Wed 9/2
TTN - SJU • 1 stop
Cheapest one-way
$146
Typical prices: $218-$269
Frontier
Wed 8/5
TTN - SJU • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Trenton and San Juan. You'll need at least 1 connection.
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Top layover airports
Cheapest • Avg $388 (round-trip)
Shortest trip • 6h 05m (one-way)
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Trenton to San Juan (TTN-SJU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Trenton to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Trenton to San Juan

Wed, Aug 26 - Wed, Sep 2
Frontier Logo
10:32 am - 1:54 am
TTN
-
SJU
15h 22m
1 stop
Frontier Logo
4:05 pm - 9:47 am
SJU
-
TTN
17h 42m
1 stop
$336Frontier
Tue, Jul 7 - Sat, Jul 11
Frontier Logo
4:26 pm - 12:41 am
TTN
-
SJU
8h 15m
1 stop
Frontier Logo
8:37 pm - 8:38 am
SJU
-
TTN
12h 01m
1 stop
$338Frontier
Wed, Aug 26 - Wed, Aug 26
Frontier Logo
10:32 am - 11:29 pm
TTN
-
SJU
12h 57m
1 stop
Frontier Logo
3:06 am - 9:47 am
SJU
-
TTN
6h 41m
1 stop
$345Frontier
Tue, Jul 28 - Mon, Aug 10
Frontier Logo
4:26 pm - 12:41 am
TTN
-
SJU
8h 15m
1 stop
Frontier Logo
5:22 pm - 3:41 pm
SJU
-
TTN
22h 19m
1 stop
$350Frontier
Sat, Jul 11 - Wed, Jul 15
Frontier Logo
4:26 pm - 12:41 am
TTN
-
SJU
8h 15m
1 stop
Frontier Logo
6:26 pm - 8:38 am
SJU
-
TTN
14h 12m
1 stop
$352Frontier
Tue, Jul 28 - Thu, Aug 6
Frontier Logo
4:26 pm - 12:41 am
TTN
-
SJU
8h 15m
1 stop
Frontier Logo
5:22 pm - 3:41 pm
SJU
-
TTN
22h 19m
1 stop
$355Frontier
Tue, Jul 14 - Fri, Jul 17
Frontier Logo
4:26 pm - 12:41 am
TTN
-
SJU
8h 15m
1 stop
Frontier Logo
10:48 pm - 11:40 pm
SJU
-
TTN
24h 52m
1 stop
$356Frontier
Sat, Sep 12 - Wed, Sep 16
Frontier Logo
10:30 am - 5:37 pm
TTN
-
SJU
7h 07m
1 stop
Frontier Logo
6:42 pm - 9:35 am
SJU
-
TTN
14h 53m
1 stop
$360Frontier
Fri, Jul 31 - Mon, Aug 3
Frontier Logo
4:26 pm - 12:41 am
TTN
-
SJU
8h 15m
1 stop
Frontier Logo
10:48 pm - 8:38 am
SJU
-
TTN
9h 50m
1 stop
$362Frontier
Sat, Aug 1 - Wed, Aug 12
Frontier Logo
6:05 am - 7:57 am
TTN
-
SJU
25h 52m
1 stop
Frontier Logo
3:10 am - 10:28 am
SJU
-
TTN
7h 18m
1 stop
$364Frontier
Booking Insights

KAYAK's insights & trends for Trenton to San Juan flights

Get data-powered insights and trends into flights from Trenton to San Juan to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Trenton and San Juan Luis Munoz Marin Intl Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Trenton to San Juan Luis Munoz Marin Intl Airport.

There is just one airline that flies from Trenton to San Juan Luis Munoz Marin Intl Airport direct and that is Frontier. The best round-trip deal found from Frontier for the route is $194.

Good to know

Cheapest flight$146
Flight from Trenton to San Juan

When to book flights from Trenton to San Juan

Are your dates flexible? Find out the best times to travel from Trenton to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Trenton to San Juan flights

  • What is the cheapest flight from Trenton to San Juan Luis Munoz Marin Intl Airport?

    In the last 5 days, the lowest price for a flight from Trenton to San Juan Luis Munoz Marin Intl Airport was $146 for a one-way ticket and $336 for a round-trip.

  • Do I need a passport to fly between Trenton and San Juan?

    A passport is required to fly from Trenton to San Juan.

  • Which airports will I be using when flying from Trenton to San Juan?

    Trenton and San Juan are both served by 1 main airport. You will leave Trenton from Trenton-Mercer and will be arriving at San Juan Luis Munoz Marin Intl.

  • Which aircraft models fly most regularly from Trenton to San Juan?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Trenton to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Trenton to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Trenton to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Trenton is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Trenton to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Trenton with another airline. Booking your flights between Trenton and SJU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Trenton to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Trenton up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Trenton to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Trenton to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Trenton to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
5.6
FrontierOverall score based on 2883 reviews
6.5Crew
4.3Entertainment
5.4Comfort
4.5Food
5.9Boarding
Airline reviews

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

6.0 GoodLinda, May 2026
AUS - DEN
Read more Frontier reviews

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

Everything you need to know for your flight from Trenton to San Juan

Information on your arrival and departure airports