$372+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SAN
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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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
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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
Best
One-way
Best flights from Trenton to San DiegoDiscover carefully curated flight deals from Trenton to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 12, 2026.
Discover carefully curated flight deals from Trenton to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 12, 2026.
This Frontier deal was found by Cheapflights users on 9/11. 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.
Thu 3/411:59 am -
2 stops14h 59m
Mon 3/88:37 pm -
2 stops11h 24m
Deal found 9/11![Frontier logo]()
$931
This Frontier deal was found by Cheapflights users on 9/11. 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.
Thu 1/2111:59 am -
2 stops14h 59m
Sat 1/305:26 pm -
2 stops14h 35m
Deal found 9/11![Frontier logo]()
$1,002
This Frontier deal was found by Cheapflights users on 9/11. 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.
Sun 1/1011:59 am -
2 stops14h 59m
Sat 1/165:26 pm -
2 stops14h 35m
Deal found 9/11![Frontier logo]()
$1,003
One-way flights from Trenton to San DiegoSearch for one-way flight options from Trenton to San Diego. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
Search for one-way flight options from Trenton to San Diego. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Frontier deal was found by Cheapflights users on 9/9. 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.
Wed 10/77:39 pm -
2 stops18h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$372
This Frontier deal was found by Cheapflights users on 9/12. 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.
Thu 11/128:01 pm -
2 stops23h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Frontier logo]()
$443
This Frontier deal was found by Cheapflights users on 9/11. 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.
Fri 9/187:39 pm -
2 stops24h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$612
This Frontier deal was found by Cheapflights users on 9/11. 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.
Thu 10/298:01 pm -
2 stops23h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$715
This Frontier deal was found by Cheapflights users on 9/10. 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.
Sat 9/197:39 pm -
2 stops23h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$786
This Frontier deal was found by Cheapflights users on 9/10. 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.
Wed 9/237:39 pm -
2 stops23h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$860
Find 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 September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $931 (Frontier) |
One-way from | $372 (Frontier) |
Popular in | December |
Cheapest in | January |
Average price | $429 |
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 7,457,451 searches. Data last updated September 12, 2026.
Use the filters below to find and compare flights from Trenton to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Wed 10/7
7:39 pm-10:46 am
2 stops18h 07m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$372
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Thu 11/12
8:01 pm-4:08 pm
2 stops23h 07m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$443
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Fri 9/18
7:39 pm-4:59 pm
2 stops24h 20m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$612
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Thu 10/29
8:01 pm-4:08 pm
2 stops23h 07m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$715
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Sat 9/19
7:39 pm-3:59 pm
2 stops23h 20m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$786
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Wed 9/23
7:39 pm-3:59 pm
2 stops23h 20m
San Diego
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$860
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Thu 3/4
11:59 am-11:58 pm
2 stops14h 59m
San Diego
Mon 3/8
8:37 pm-11:01 am
2 stops11h 24m
$931
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Thu 1/21
11:59 am-11:58 pm
2 stops14h 59m
San Diego
Sat 1/30
5:26 pm-11:01 am
2 stops14h 35m
$1,002
TrentonSan Diego
TTN Trenton-Mercer - SAN San Diego
TTNSAN
Trenton-Mercer
Sun 1/10
11:59 am-11:58 pm
2 stops14h 59m
San Diego
Sat 1/16
5:26 pm-11:01 am
2 stops14h 35m
$1,003
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Trenton, New Jersey-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Trenton, New Jersey-San Diego flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
TTN-SAN
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.
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.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
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Julian
Lemon Grove
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