In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

How far in advance should I book a flight from Trenton, New Jersey to Ontario?

Users have found that booking a flight from Trenton, New Jersey to Ontario at least 59 days early can save you up to 86% on average compared to booking a flight this week. If booking 59 days before your flight isn’t an option for you, users have found flights from Trenton, New Jersey to Ontario for as little as $387 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $631 for flights departing within the next 3 days.

What is the cheapest month to fly from Trenton, New Jersey to Ontario?

The best pricing can be found in the month of September. Prices to Ontario from Trenton, New Jersey average $368. You can even find prices in September for less than $368, as users have found deals to Ontario from as low as $131. The month of December appears to be one of the more expensive times to travel to Ontario from Trenton, New Jersey. Flying in the targeted month can save you up to 34%.

What is the cheapest time of day to fly from TTN to ONT?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Trenton, New Jersey to Ontario as you normally would.

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.

$184+ Flights from Trenton, NJ to Ontario

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Cheap flight deals from Trenton to Ontario

Round-trip from	$423 (Frontier)
One-way from	$184 (Frontier)
Popular in	December
Cheapest in	September
Average price	$396

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. 6% potential increase in price ($26 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 July 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 July 3, 2025.

Fri 8/2910:53 amTTN - ONT

2 stops15h 57mFrontier

Sun 8/3112:59 amONT - TTN

2 stops13h 27mFrontier

Deal found 7/2

$423

Best flights from Trenton to Ontario
Discover carefully curated flight deals from Trenton to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Fri 8/2910:53 amTTN - ONT

2 stops15h 57mFrontier

Sun 8/3112:59 amONT - TTN

2 stops13h 27mFrontier

Deal found 7/2

$423

Last-minute flights from Trenton to Ontario
Discover last-minute flight deals from Trenton to Ontario. Data last updated July 3, 2025 and is based on user searches.

Sat 7/129:29 amTTN - ONT

2 stops17h 21mFrontier

Sat 8/231:07 pmONT - TTN

2 stops18h 18mFrontier

Deal found 6/30

$619

Fri 8/2910:53 amTTN - ONT

2 stops15h 57mFrontier

Sun 8/3112:59 amONT - TTN

2 stops13h 27mFrontier

Deal found 7/2

$423

One-way flights from Trenton to Ontario
Search for one-way flight options from Trenton to Ontario. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Mon 8/1812:48 pmTTN - ONT

2 stops14h 02mFrontier

Deal found 7/3

$184

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Fri 8/29

10:53 am-11:50 pm

2 stops15h 57m

Ontario

Sun 8/31

12:59 am-5:26 pm

2 stops13h 27m

$423

TrentonOntario

TTN - ONT

TTNONT

Trenton-Mercer

Mon 8/18

12:48 pm-11:50 pm

2 stops14h 02m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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.

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Frontier from Trenton to Ontario 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

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

Reviews

1 / 20

8.0

Excellent

Anonymous,Jun 2025

TTN - TPA

Related info for your journey

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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$184+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Trenton to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Trenton to Ontario

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Find flight deals from Trenton to Ontario

Cheapest flights from Trenton to OntarioExplore 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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to Ontario that are best for you.

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.

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?

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Frontier from Trenton to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

How can I find direct flights from Trenton to Ontario?

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

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

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.

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Travel Smart

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 July 3, 2025.