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$184+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SAN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$366
(Frontier)

One-way from

$184
(Frontier)

Popular in

December

Cheapest in

October

Average price

$402
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. 6% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 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 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 July 3, 2025.

This Frontier deal was found by Cheapflights users on 7/2. 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 8/1812:48 pmTTN - SAN
2 stops14h 04mFrontier
Thu 8/218:26 pmSAN - TTN
2 stops10h 42mFrontier
Deal found 7/2$366

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 July 3, 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

Mon 8/18

12:48 pm-11:52 pm

2 stops14h 04m

San Diego

Thu 8/21

8:26 pm-10:08 am

2 stops10h 42m

$366

TrentonSan Diego

TTN - SAN

TTNSAN

Trenton-Mercer

Mon 8/11

12:48 pm-11:52 pm

2 stops14h 04m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 Diego. Reviews last updated July 3, 2025.
Get a feel of what it's like to fly with Frontier from Trenton to San Diego 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
3,286 reviews

Comfort

5.6

Entertainment

4.5

Boarding

6.2

Food

4.7

Overall

5.9

Crew

6.8

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
3,286 reviews
Frontier
5.9
Fair
3,286 reviews

Comfort

5.6

Entertainment

4.5

Boarding

6.2

Food

4.7

Overall

5.9

Crew

6.8

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 Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 Trenton?

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

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