HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$150+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — ONT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Trenton to Ontario 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 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 September 16, 2025.

Round-trip from

$242
(Frontier)

One-way from

$150
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$317
From Trenton-Mercer to Ontario
Search Deals
One-way flight from Trenton-Mercer to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 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.
Sat 10/411:45 amTTN - ONT
2 stops22h 38mFrontier
Sat 10/188:34 amONT - TTN
2 stops12h 25mFrontier
Deal found 9/14$242
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.
Fri 10/176:00 amTTN - ONT
2 stops20h 13mFrontier
Sun 10/191:09 amONT - TTN
2 stops19h 50mFrontier
Deal found 9/14$739
This Frontier deal was found by Cheapflights users on 9/16. 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 10/99:00 amTTN - ONT
2 stops17h 13mFrontier
Sun 10/121:09 amONT - TTN
2 stops19h 50mFrontier
Deal found 9/16$819

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 September 16, 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

Sat 10/4

11:45 am-7:23 am

2 stops22h 38m

Ontario

Sat 10/18

8:34 am-11:59 pm

2 stops12h 25m

$242

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Fri 10/17

6:00 am-11:13 pm

2 stops20h 13m

Ontario

Sun 10/19

1:09 am-11:59 pm

2 stops19h 50m

$739

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Thu 10/9

9:00 am-11:13 pm

2 stops17h 13m

Ontario

Sun 10/12

1:09 am-11:59 pm

2 stops19h 50m

$819

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Fri 9/26

12:30 pm-11:38 pm

2 stops14h 08m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 22h 38m. 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

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 Ontario

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
John F Kennedy Intl to San Francisco flights
Newark to Los Angeles flights
Newark to San Francisco flights
LaGuardia to Los Angeles flights
LaGuardia to Las Vegas flights
John F Kennedy Intl to Ontario flights
Philadelphia to Las Vegas flights
LaGuardia to San Francisco flights
John F Kennedy Intl to San Diego flights
Newark to San Diego flights
Newark to Burbank flights
Newark to Santa Ana flights
Newark to Ontario flights
Philadelphia to San Francisco flights
LaGuardia to Burbank flights
Philadelphia to Los Angeles flights
LaGuardia to Santa Ana flights
John F Kennedy Intl to Santa Ana flights
LaGuardia to San Diego flights
LaGuardia to Ontario flights
Philadelphia to San Diego flights
John F Kennedy Intl to Palm Springs flights
Newark to Palm Springs flights
Newark to Sacramento flights
Philadelphia to Ontario flights
Newark to San Jose flights
John F Kennedy Intl to San Jose flights
LaGuardia to Palm Springs flights
John F Kennedy Intl to Burbank flights
Newark to Oakland flights
Philadelphia to Santa Ana flights
John F Kennedy Intl to Sacramento flights
Atlantic City to Las Vegas flights
John F Kennedy Intl to Reno flights
John F Kennedy Intl to Oakland flights
John F Kennedy Intl to Long Beach flights
LaGuardia to San Jose flights
LaGuardia to Sacramento flights
Philadelphia to Palm Springs flights
Newark to Reno flights
Trenton to Las Vegas flights
LaGuardia to Oakland flights
LaGuardia to Reno flights
Philadelphia to Burbank flights
John F Kennedy Intl to Fresno flights
Atlantic City to Los Angeles flights
Philadelphia to San Jose 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.