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$123+ Cheap flights from Trenton, NJ to Ontario (TTN - ONT)

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — ONT
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from Trenton to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Trenton (TTN) to Ontario (ONT). 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 August 20, 2025.

Round-trip from

$428
(Frontier)

One-way from

$123
(Frontier)

Popular in

December

Cheapest in

January

Average price

$356
From Trenton-Mercer to Ontario
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One-way flight from Trenton-Mercer to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Trenton to Ontario

Cheapest flights from Trenton to Ontario
Explore the most affordable flight options available from Trenton to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This Frontier deal was found by Cheapflights users on 8/19. 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 9/410:30 amTTN - ONT
2 stops27h 58mFrontier
Wed 9/108:59 pmONT - TTN
2 stops35h 35mFrontier
Deal found 8/19$428
This Frontier deal was found by Cheapflights users on 8/17. 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 8/186:45 amTTN - ONT
2 stops14h 42mFrontier
Sun 8/245:09 pmONT - TTN
2 stops13h 05mFrontier
Deal found 8/17$477
This Frontier deal was found by Cheapflights users on 8/20. 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 8/2210:53 amTTN - ONT
2 stops15h 57mFrontier
Sun 8/245:09 pmONT - TTN
2 stops13h 05mFrontier
Deal found 8/20$570

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trenton to Ontario 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 August 20, 2025.
Use the filters below to find and compare flights from Trenton to Ontario that are best for you.

Fly from

Trenton

Fly to

Ontario

Route

Depart

Return

Price

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Thu 9/4

10:30 am-11:28 am

2 stops27h 58m

Ontario

Wed 9/10

8:59 pm-11:34 am

2 stops35h 35m

$428

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Mon 10/6

11:45 am-10:13 pm

2 stops13h 28m

$123

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Thu 9/4

10:30 am-11:28 am

2 stops27h 58m

$125

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Thu 9/18

10:30 am-11:28 am

2 stops27h 58m

$125

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Fri 10/3

12:30 pm-7:54 pm

2 stops34h 24m

$130

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Mon 9/15

12:30 pm-7:54 pm

2 stops34h 24m

$130

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Mon 9/29

12:30 pm-7:54 pm

2 stops34h 24m

$130

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Sun 9/21

10:30 am-7:54 pm

2 stops36h 24m

$130

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Fri 9/26

12:30 pm-7:54 pm

2 stops34h 24m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Best time to book a flight from Trenton to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Trenton, New Jersey to Ontario (average of $246). Flying from Trenton, New Jersey to Ontario in March is currently the most expensive (average of $328). 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 Ontario. 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 Ontario?

    Airlines like Frontier fly from Trenton, New Jersey to Ontario in about 27h 58m. The time it takes to get you to your destination can typically vary by up to . Trenton, New Jersey and Ontario are separated by a distance of 2369 mi.

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

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

  • How can I find direct flights from Trenton to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Trenton to Ontario 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 Ontario?

    Currently, August is the cheapest month in which you can book a flight from Trenton, New Jersey to Ontario (average of $246). Flying from Trenton, New Jersey to Ontario in March is currently the most expensive (average of $328). 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

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