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$159+ Cheap flights from Trenton, NJ to San Diego (TTN - SAN)

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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SAN
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheap flight deals from Trenton to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Trenton (TTN) to San Diego (SAN). 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 septiembre 16, 2025.

Round-trip from

$301
(Frontier)

One-way from

$159
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$337
From Trenton-Mercer to San Diego
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One-way flight from Trenton-Mercer to San Diego
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Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Trenton to San Diego

Cheapest flights from Trenton to San Diego
Explore the most affordable flight options available from Trenton to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 16, 2025.

This Frontier deal was found by Cheapflights users on 9/14. 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.
lun. 9/2912:30 pmTTN - SAN
2 stops14h 23mFrontier
vie. 10/310:20 amSAN - TTN
2 stops21h 40mFrontier
Deal found 9/14$301

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trenton to San Diego 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 septiembre 16, 2025.
Use the filters below to find and compare flights from Trenton to San Diego that are best for you.

Fly from

Trenton

Fly to

San Diego

Route

Depart

Return

Price

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

lun. 9/29

12:30 pm-11:53 pm

2 stops14h 23m

San Diego

vie. 10/3

10:20 am-11:00 am

2 stops21h 40m

$301

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

jue. 10/16

6:00 am-6:28 pm

2 stops15h 28m

$159

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

vie. 10/10

6:00 am-10:25 pm

2 stops43h 25m

$238

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

vie. 10/10

6:00 am-11:50 pm

3 stops20h 50m

$316

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

lun. 12/1

12:44 pm-1:30 pm

3 stops51h 46m

$398

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

lun. 12/1

12:44 pm-1:30 pm

2 stops27h 46m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Best time to book a flight from Trenton to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 Diego

What is the cheapest month to book a flight from Trenton, New Jersey to San Diego?

Currently, August is the cheapest month in which you can book a flight from Trenton, New Jersey to San Diego (average of $286). Flying from Trenton, New Jersey to San Diego in March is currently the most expensive (average of $366). 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.

Related info for your journey

Find useful and relevant information for your journey from Trenton to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Trenton, New Jersey to San Diego?

    Departing from Trenton, New Jersey to San Diego will take you 14h 23m. The distance from Trenton, New Jersey to San Diego is about 2386 mi.

  • Can I find deals for flights from Trenton to San Diego that include hotel bookings?

    Yes. In addition to deals on Trenton to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Trenton to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Diego.

  • Can I find deals for business class flights from Trenton to San Diego?

    Yes. Cheapflights offers flight deals from Trenton to San Diego 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 Diego?

    Currently, August is the cheapest month in which you can book a flight from Trenton, New Jersey to San Diego (average of $286). Flying from Trenton, New Jersey to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City

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