What is the cheapest airline to fly from Trenton, New Jersey to Chicago round-trip?

Our cheapest airline available from Trenton, New Jersey to Chicago is Frontier. Our recent data shows that you can find tickets from as low as $156 on this airline.

What is the cheapest day to fly from Trenton, New Jersey to Chicago?

Travelers seeking maximum savings on their Trenton, New Jersey to Chicago flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest day to fly round-trip from Trenton, New Jersey to Chicago?

Saturday flights are generally found to be more expensive for flights from Trenton, New Jersey to Chicago. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Chicago.

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

To save up to 90% on this flight, we recommend booking at least 36 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Trenton, New Jersey to Chicago from $228 1-2 weeks out and tickets from $375 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, September can be a great choice for travel to Chicago. Flights to Chicago from Trenton, New Jersey in September are about $229 on average during September, but can be found for as low as $74.

What airport do you fly from for flights from Trenton to Chicago?

Most people fly from Trenton-Mercer (TTN) if they book a flight from Trenton to Chicago. On average, Trenton-Mercer has 0 outbound flights to Chicago per day from 0 airlines. Trenton-Mercer is conveniently located just 4.8 mi from Trenton’s city center.

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

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

How can I find direct flights from Trenton to Chicago?

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

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

Yes. Cheapflights offers flight deals from Trenton to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$105+ Flights from Trenton, NJ to Chicago

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Trenton to Chicago 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 Chicago

Round-trip from	$156 (Priceline)
One-way from	$105 (Trip.com)
Popular in	December
Cheapest in	September
Average price	$236

From Trenton-Mercer to Chicago (CHI)

Search Deals

One-way flight from Trenton-Mercer to Chicago (CHI)

Search Deals

Highest demand for flights based on searches. 1% potential increase in price ($3 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Trenton to Chicago

Cheapest flights from Trenton to Chicago
Explore the most affordable flight options available from Trenton to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Fri 8/85:15 pmTTN - ORD

1 stop7h 16mFrontier

Mon 8/115:01 amORD - TTN

1 stop5h 21mFrontier

Deal found 7/3

$190

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

Fri 7/255:15 pmTTN - ORD

1 stop7h 16mFrontier

Mon 7/285:01 amORD - TTN

1 stop5h 21mFrontier

Deal found 7/3

$156

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

Fri 7/1112:48 pmTTN - ORD

1 stop12h 34mFrontier

Mon 7/145:01 amORD - TTN

1 stop5h 21mFrontier

Deal found 7/2

$245

Fri 8/85:15 pmTTN - ORD

1 stop7h 16mFrontier

Mon 8/115:01 amORD - TTN

1 stop5h 21mFrontier

Deal found 7/3

$190

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

Sat 8/308:00 amTTN - ORD

1 stop11h 41mFrontier

Deal found 7/2

$105

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Fri 8/8

5:15 pm-11:31 pm

1 stop7h 16m

Chicago O'Hare Intl

Mon 8/11

5:01 am-11:22 am

1 stop5h 21m

$190

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 8/30

8:00 am-6:41 pm

1 stop11h 41m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Trenton to Chicago

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

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

Currently, August is the cheapest month in which you can book a flight from Trenton, New Jersey to Chicago (average of $245). Flying from Trenton, New Jersey to Chicago in March is currently the most expensive (average of $321). 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.

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

It’s optimal to fly from Trenton, New Jersey to Chicago in the afternoon. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Chicago

Peruse reviews from past customers who have flown with Frontier from Trenton to Chicago to help guide your decision. You can also see how each airline stacks up 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

What airport do you fly from for flights from Trenton to Chicago?
Most people fly from Trenton-Mercer (TTN) if they book a flight from Trenton to Chicago. On average, Trenton-Mercer has 0 outbound flights to Chicago per day from 0 airlines. Trenton-Mercer is conveniently located just 4.8 mi from Trenton’s city center.
What is the cheapest airline to fly from Trenton, New Jersey to Chicago round-trip?
Our cheapest airline available from Trenton, New Jersey to Chicago is Frontier. Our recent data shows that you can find tickets from as low as $156 on this airline.
Can I find deals for flights from Trenton to Chicago that include hotel bookings?
Yes. In addition to deals on Trenton to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Trenton to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to Chicago.
Can I find deals for business class flights from Trenton to Chicago?
Yes. Cheapflights offers flight deals from Trenton to Chicago 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 Chicago?
Currently, August is the cheapest month in which you can book a flight from Trenton, New Jersey to Chicago (average of $245). Flying from Trenton, New Jersey to Chicago in March is currently the most expensive (average of $321). 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

Merrillville

Lansing

Benton Harbor

Porter

Hammond

Valparaiso

Chesterton

Browse thousands of different options on Cheapflights for your next trip

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.

$105+ Cheap flights from Trenton, NJ (TTN) to Chicago (CHI)

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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Trenton to Chicago 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 Chicago

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Trenton to Chicago

Cheapest flights from Trenton to ChicagoExplore the most affordable flight options available from Trenton to Chicago. 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 Chicago. 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 Chicago that are best for you.

Best time to book a flight from Trenton to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Trenton with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Trenton to Chicago

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

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

Find hourly flight availability from Trenton to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Reviews of airlines servicing Chicago

Peruse reviews from past customers who have flown with Frontier from Trenton to Chicago to help guide your decision. You can also see how each airline stacks up 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 Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Trenton to Chicago?

What is the cheapest airline to fly from Trenton, New Jersey to Chicago round-trip?

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

How can I find direct flights from Trenton to Chicago?

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

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

Traveling to a place near Trenton?

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 Chicago

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Trenton to Chicago
Explore the most affordable flight options available from Trenton to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.