HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$246+ Cheap flights from Trenton, NJ to San Diego (TTN - SAN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SAN
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Trenton to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$246
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$342
Provider with most accurate pricing for Trenton-Mercer-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Trenton-Mercer-San Diego flights.
Search Deals
From Trenton-Mercer to San Diego
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 8, 2026.

This Trip.com deal was found by Cheapflights users on 1/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/218:00 amTTN - SAN
2 stops19h 08mFrontier
Tue 2/247:11 amSAN - TTN
2 stops37h 28mFrontier
Deal found 1/6$246

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 January 8, 2026.
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

Sat 2/21

8:00 am-12:08 am

2 stops19h 08m

San Diego

Tue 2/24

7:11 am-11:39 pm

2 stops37h 28m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Compare providers for flights from Trenton to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Trenton to San Diego in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Trenton, New Jersey-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Trenton, New Jersey-San Diego flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Trenton, New Jersey-San Diego flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Trenton, New Jersey-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, November is the cheapest month in which you can book a flight from Trenton, New Jersey to San Diego (average of $72). Flying from Trenton, New Jersey to San Diego in July is currently the most expensive (average of $168). 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 19h 08m. 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, November is the cheapest month in which you can book a flight from Trenton, New Jersey to San Diego (average of $72). Flying from Trenton, New Jersey to San Diego in July is currently the most expensive (average of $168). 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
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Trenton to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Las Vegas flights
Newark to Los Angeles flights
LaGuardia to Los Angeles flights
LaGuardia to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Newark to San Francisco flights
Philadelphia to Las Vegas flights
LaGuardia to San Francisco flights
LaGuardia to Burbank flights
John F Kennedy Intl to San Diego flights
Newark to San Diego flights
Philadelphia to Los Angeles flights
John F Kennedy Intl to Ontario flights
Newark to Ontario flights
Philadelphia to San Francisco flights
LaGuardia to Santa Ana flights
Newark to Palm Springs flights
LaGuardia to Ontario flights
LaGuardia to San Diego flights
John F Kennedy Intl to Santa Ana flights
Newark to Santa Ana flights
John F Kennedy Intl to Palm Springs flights
John F Kennedy Intl to Reno flights
LaGuardia to Palm Springs flights
Philadelphia to San Diego flights
John F Kennedy Intl to San Jose flights
Newark to San Jose flights
Philadelphia to Ontario flights
Newark to Reno flights
LaGuardia to Reno flights
Newark to Sacramento flights
LaGuardia to San Jose flights
Newark to Oakland flights
John F Kennedy Intl to Oakland flights
John F Kennedy Intl to Burbank flights
Trenton to Las Vegas flights
John F Kennedy Intl to Sacramento flights
Philadelphia to Santa Ana flights
John F Kennedy Intl to Long Beach flights
LaGuardia to Sacramento flights
Philadelphia to San Jose flights
Philadelphia to Palm Springs flights
LaGuardia to Oakland flights
Philadelphia to Reno flights
Newark to Burbank flights
Philadelphia to Sacramento flights
Philadelphia to Burbank flights
Philadelphia to Oakland flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.