$164 Cheap Flights from San José (SJO) to Trenton (TTN)

View $164 flight on Sat, Dec 20, 2025Opens in a new window

Popular airlines from Juan Santamaria Intl. Airport (SJO) to Trenton–Mercer Airport (TTN)

Cheap Flights from San José to Trenton (SJO-TTN)

Prices were available within the past 7 days and start at $164 for one-way flights and $346 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Dec 20 - Fri, Jan 16
SJO
San José
TTN
Trenton
$346 Roundtrip, found 3 days ago
$346
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Dec 20 from San José to Trenton, returning Fri, Jan 16, priced at $346 found 3 days ago
Frontier Airlines
Sat, Dec 27 - Fri, Jan 2
SJO
San José
TTN
Trenton
$385 Roundtrip, found 3 days ago
$385
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Dec 27 from San José to Trenton, returning Fri, Jan 2, priced at $385 found 3 days ago
Frontier Airlines
Sat, Dec 27 - Fri, Jan 2
SJO
San José
TTN
Trenton
$392 Roundtrip, found 3 days ago
$392
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Dec 27 from San José to Trenton, returning Fri, Jan 2, priced at $392 found 3 days ago
American Airlines
Mon, Dec 22 - Fri, Jan 9
SJO
San José
TTN
Trenton
$672 Roundtrip, found 2 days ago
$672
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 22 from San José to Trenton, returning Fri, Jan 9, priced at $672 found 2 days ago
American Airlines
Mon, Dec 22 - Fri, Jan 9
SJO
San José
TTN
Trenton
$685 Roundtrip, found 2 days ago
$685
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 22 from San José to Trenton, returning Fri, Jan 9, priced at $685 found 2 days ago
Frontier Airlines
Sat, Apr 4 - Sat, Apr 11
SJO
San José
TTN
Trenton
$710 Roundtrip, found 15 hours ago
$710
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Sat, Apr 4 from San José to Trenton, returning Sat, Apr 11, priced at $710 found 15 hours ago
American Airlines
Mon, Dec 22 - Fri, Jan 9
SJO
San José
TTN
Trenton
$777 Roundtrip, found 2 days ago
$777
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 22 from San José to Trenton, returning Fri, Jan 9, priced at $777 found 2 days ago
American Airlines
Mon, Dec 22 - Fri, Jan 9
SJO
San José
TTN
Trenton
$792 Roundtrip, found 2 days ago
$792
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 22 from San José to Trenton, returning Fri, Jan 9, priced at $792 found 2 days ago
Frontier Airlines
Sat, Dec 20 - Fri, Dec 26
SJO
San José
TTN
Trenton
$804 Roundtrip, found 5 days ago
$804
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sat, Dec 20 from San José to Trenton, returning Fri, Dec 26, priced at $804 found 5 days ago
Frontier Airlines
Sat, Apr 4 - Sat, Apr 11
SJO
San José
TTN
Trenton
$938 Roundtrip, found 15 hours ago
$938
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Sat, Apr 4 from San José to Trenton, returning Sat, Apr 11, priced at $938 found 15 hours ago
Flights from San José (SJO) to Trenton (TTN)
Origin airport
Juan Santamaría Intl.
Destination airport
Mercer
Roundtrip price
$346
Distance
2169 mi

San José to Trenton Flights

The cheapest times to fly from San José to Trenton

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San José to Trenton are during the month of December. You can find some of the cheapest flights from San José to Trenton with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San José to Trenton

Sunday is one of the best days to book for cheap flights from San José to Trenton: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San José to Trenton

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San José to Trenton in 2026. You can also book with separate airlines for your outbound and return journeys, from $164 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San José to Trenton flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San José to Trenton airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN) cost?
Grab a cheap one-way flight from $164 or cheap return flight from $346 from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN)?
Traveling in December is a great way to save, as it's the cheapest month for flights between SJO and TTN. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from SJO to TTN. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN)?
There aren't any daily nonstop flights available from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from SJO to TTN?
Usually you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* But this can vary based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN)?
Choose a flight from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN) that takes off before 3 PM to reduce the likelihood of delays. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Trenton from Juan Santamaria Intl. Airport (SJO)?
Explore your flight options from Juan Santamaria Intl. Airport (SJO) to Liberty Intl. Airport (EWR). This is the only airport in Trenton you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN) last-minute?
Waiting until right before your break to book a ticket from SJO to TTN often results in higher prices. While it's possible to find some last-minute discounts, there's no guarantee. Keep your travel plans flexible for a better chance of landing a bargain.
Is it cheaper to book a SJO to TTN flight and hotel package?
Compared with arranging hotels and flights separately, booking a SJO to TTN flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the hassle out of planning your trip. Simply secure your flights and choose from our wide range of hotels, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Juan Santamaria Intl. Airport (SJO) to Mercer Airport (TTN)?
Typically, you're able to cancel or reschedule your SJO to TTN flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.