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Trenton

$44+ Cheap flights from Illinois to Trenton, NJ (TTN)

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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TTN
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Find flight deals from Illinois to Trenton

Cheapest flights from Illinois to Trenton
Explore the most affordable flight options available from Illinois to Trenton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This Booking.com deal was found by Cheapflights users on 10/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:15 amORD - TTN
1 stop14h 44mFrontier
Thu 10/306:00 amTTN - ORD
1 stop7h 26mFrontier
Deal found 10/12$109
This Gotogate deal was found by Cheapflights users on 10/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:50 amORD - TTN
1 stop26h 34mFrontier
Thu 10/306:00 amTTN - ORD
1 stop7h 26mFrontier
Deal found 10/12$154
This Frontier deal was found by Cheapflights users on 10/12. 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.
Thu 11/135:25 amORD - TTN
1 stop9h 07mFrontier
Mon 11/176:00 amTTN - ORD
1 stop7h 16mFrontier
Deal found 10/12$191
This Gotogate deal was found by Cheapflights users on 10/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/135:25 amORD - TTN
1 stop17h 34mFrontier
Sun 11/164:27 pmTTN - ORD
1 stop20h 49mFrontier
Deal found 10/13$192
This Booking.com deal was found by Cheapflights users on 10/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:50 amORD - TTN
1 stop26h 34mFrontier
Sat 10/258:00 amTTN - ORD
1 stop8h 39mFrontier
Deal found 10/12$202
This Booking.com deal was found by Cheapflights users on 10/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:05 pmSTL - TTN
1 stop5h 54mFrontier
Mon 11/176:00 amTTN - STL
1 stop8h 17mFrontier
Deal found 10/13$212
This Booking.com deal was found by Cheapflights users on 10/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:15 amORD - TTN
1 stop14h 44mFrontier
Fri 10/316:00 amTTN - ORD
1 stop7h 26mFrontier
Deal found 10/12$222
This Frontier deal was found by Cheapflights users on 10/11. 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 11/14:33 pmSTL - TTN
1 stop6h 26mFrontier
Mon 11/36:00 amTTN - STL
1 stop8h 17mFrontier
Deal found 10/11$230
This Gotogate deal was found by Cheapflights users on 10/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:50 amORD - TTN
1 stop26h 34mFrontier
Sun 10/264:25 pmTTN - ORD
1 stop25h 48mFrontier
Deal found 10/12$237
This Gotogate deal was found by Cheapflights users on 10/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:43 pmORD - TTN
1 stop13h 31mFrontier
Mon 10/276:00 amTTN - ORD
1 stop12h 13mFrontier
Deal found 10/12$238
This Booking.com deal was found by Cheapflights users on 10/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/315:25 amORD - TTN
1 stop17h 34mFrontier
Mon 11/36:00 amTTN - ORD
1 stop7h 16mFrontier
Deal found 10/12$250
This Frontier deal was found by Cheapflights users on 10/13. 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 10/231:41 pmSTL - TTN
1 stop9h 18mFrontier
Sat 10/258:00 amTTN - STL
1 stop8h 38mFrontier
Deal found 10/13$254

Cheap flight deals from Illinois to Trenton

Keep the following information in mind while searching for Illinois to Trenton flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$109
(Booking.com)

One-way from

$44
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$201
Provider with most accurate pricing for Chicago (CHI)-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-New York (NYC) flights.
Search Deals
From Illinois to Trenton-Mercer
Search Deals
One-way flight from Illinois to Trenton-Mercer
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Trenton 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 October 14, 2025.
Use the filters below to find and compare flights from Illinois to Trenton that are best for you.

Fly from

Illinois

Fly to

Trenton

Route

Depart

Return

Price

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Mon 10/27

8:15 am-11:59 pm

1 stop14h 44m

Trenton-Mercer

Thu 10/30

6:00 am-12:26 pm

1 stop7h 26m

$109

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Thu 11/13

5:25 am-3:32 pm

1 stop9h 07m

Trenton-Mercer

Mon 11/17

6:00 am-12:16 pm

1 stop7h 16m

$191

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 11/14

5:05 pm-11:59 pm

1 stop5h 54m

Trenton-Mercer

Mon 11/17

6:00 am-1:17 pm

1 stop8h 17m

$212

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sat 11/1

4:33 pm-11:59 pm

1 stop6h 26m

Trenton-Mercer

Mon 11/3

6:00 am-1:17 pm

1 stop8h 17m

$230

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Sat 10/25

7:43 pm-10:14 am

1 stop13h 31m

Trenton-Mercer

Mon 10/27

6:00 am-5:13 pm

1 stop12h 13m

$238

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 10/23

1:41 pm-11:59 pm

1 stop9h 18m

Trenton-Mercer

Sat 10/25

8:00 am-3:38 pm

1 stop8h 38m

$254

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 11/14

5:25 am-11:59 pm

1 stop17h 34m

Trenton-Mercer

Sun 11/16

4:27 pm-12:16 pm

1 stop20h 49m

$256

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 11/14

5:25 am-11:59 pm

1 stop17h 34m

Trenton-Mercer

Mon 11/17

6:00 am-12:16 pm

1 stop7h 16m

$259

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 10/24

8:44 am-11:59 pm

1 stop14h 15m

Trenton-Mercer

Mon 10/27

6:00 am-5:13 pm

1 stop12h 13m

$275

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 11/13

2:12 pm-11:59 pm

1 stop8h 47m

Trenton-Mercer

Sun 11/16

4:27 pm-9:40 am

1 stop18h 13m

$275

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 36 results
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Best time to book a flight from Illinois to Trenton

Have a flexible travel schedule? Discover the best time to fly to Trenton from Illinois 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 Illinois to Trenton

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Trenton, New Jersey (average of $54). Flying from Illinois to Trenton, New Jersey in July is currently the most expensive (average of $104). 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 IL to TTN?

Find hourly flight availability from Illinois to Trenton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

One of the essential ways to save on airfare from Illinois to Trenton, New Jersey is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 68% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Trenton. 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 into for flights to Trenton from Illinois?

    Most people fly into Trenton-Mercer (TTN) if they book a flight to Trenton from Illinois. Trenton-Mercer is conveniently located just 4.8 mi from Trenton’s city center.

  • How long is the flight from Illinois to Trenton, New Jersey?

    For as low as $109, Frontier can have you in Trenton, New Jersey from Illinois in 14h 44m. The distance from Illinois to Trenton, New Jersey is about 690 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Trenton 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 Illinois to Trenton, New Jersey?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Trenton, New Jersey (average of $54). Flying from Illinois to Trenton, New Jersey in July is currently the most expensive (average of $104). 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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