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$109+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — CHI
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Trenton to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Trenton (TTN) to Chicago (CHI). 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 June 12, 2025.

Round-trip from

$285
(Frontier)

One-way from

$109
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$268
From Trenton-Mercer to Chicago (CHI)
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One-way flight from Trenton-Mercer to Chicago (CHI)
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Highest demand for flights based on searches. 2% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/12. 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.
Sat 7/129:29 amTTN - ORD
1 stop10h 51mFrontier
Wed 7/1611:28 amORD - TTN
1 stop11h 31mFrontier
Deal found 6/12$277

Cheapflights Fare Finder

Customize your flight search to find flights from Trenton to Chicago 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 June 12, 2025.
Use the filters below to find and compare flights from Trenton to Chicago that are best for you.

Fly from

Trenton

Fly to

Chicago

Route

Depart

Return

Price

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 7/12

9:29 am-7:20 pm

1 stop10h 51m

Chicago O'Hare Intl

Wed 7/16

11:28 am-11:59 pm

1 stop11h 31m

$277

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Mon 8/18

5:15 pm-11:31 pm

1 stop7h 16m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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?

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 June 12, 2025.

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.

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

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.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chicago. Reviews last updated June 12, 2025.
Frontier
5.9
Fair
3,295 reviews

Food

4.8

Entertainment

4.5

Overall

5.9

Crew

6.8

Comfort

5.6

Boarding

6.2

Reviews

1 / 20
4.0
Okay

Paulina,Jun 2025

MSY - DEN

The staff in the plane and outside of the plane were very rude. My flight was delayed 3 times which i understand was not the staff’s fault but my boarding pass time was never updated which had multiple people very confused and when I asked the question of why no answer was given. They made a handful of people check their bag and upon entering the plane there was still plenty of room.
Frontier
5.9
Fair
3,295 reviews
Frontier
5.9
Fair
3,295 reviews

Food

4.8

Entertainment

4.5

Overall

5.9

Crew

6.8

Comfort

5.6

Boarding

6.2

Reviews

1 / 20
4.0
Okay

Paulina,Jun 2025

MSY - DEN

The staff in the plane and outside of the plane were very rude. My flight was delayed 3 times which i understand was not the staff’s fault but my boarding pass time was never updated which had multiple people very confused and when I asked the question of why no answer was given. They made a handful of people check their bag and upon entering the plane there was still plenty of room.

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?

    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 $285 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

Traveling to a place near Trenton?

Book flights to Trenton if you plan to visit one of these locations
Merrillville
Lansing
Benton Harbor
Porter
Hammond
Valparaiso
Chesterton

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