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Trenton

$81+ 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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TTN
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 November 26, 2025.

This Mytrip deal was found by Cheapflights users on 11/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/103:30 pmSTL - TTN
1 stop24h 33mFrontier
Sat 12/136:10 amTTN - STL
1 stop17h 23mFrontier
Deal found 11/25$162
This Mytrip deal was found by Cheapflights users on 11/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/173:30 pmSTL - TTN
1 stop28h 44mFrontier
Tue 12/306:10 amTTN - STL
1 stop17h 23mFrontier
Deal found 11/23$174
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:09 pmORD - TTN
1 stop27h 54mMultiple Airlines
Mon 12/156:10 amTTN - ORD
1 stop8h 06mMultiple Airlines
Deal found 11/24$180
This Frontier deal was found by Cheapflights users on 11/24. 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 12/62:26 pmORD - TTN
1 stop8h 33mFrontier
Sat 12/136:10 amTTN - ORD
1 stop8h 06mFrontier
Deal found 11/24$183
This Super.com deal was found by Cheapflights users on 11/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:26 pmORD - TTN
1 stop8h 33mFrontier
Sat 12/136:10 amTTN - ORD
1 stop8h 06mFrontier
Deal found 11/25$187
This CheapOair deal was found by Cheapflights users on 11/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:18 pmORD - TTN
1 stop22h 00mFrontier
Sun 12/219:59 pmTTN - ORD
1 stop11h 48mFrontier
Deal found 11/24$188
This Booking.com deal was found by Cheapflights users on 11/26. 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 12/129:54 amSTL - TTN
1 stop13h 05mFrontier
Mon 12/155:58 pmTTN - STL
1 stop29h 35mFrontier
Deal found 11/26$189
This Mytrip deal was found by Cheapflights users on 11/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/152:26 pmORD - TTN
1 stop8h 33mFrontier
Sat 1/107:35 pmTTN - ORD
1 stop20h 53mFrontier
Deal found 11/24$193
This Booking.com deal was found by Cheapflights users on 11/24. 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 12/113:30 pmSTL - TTN
1 stop24h 33mFrontier
Sun 1/117:58 pmTTN - STL
1 stop21h 07mFrontier
Deal found 11/24$199
This Priceline deal was found by Cheapflights users on 11/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:26 pmORD - TTN
1 stop8h 33mFrontier
Mon 12/156:10 amTTN - ORD
1 stop8h 06mFrontier
Deal found 11/25$204
This Super.com deal was found by Cheapflights users on 11/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:26 pmORD - TTN
1 stop8h 33mFrontier
Fri 12/126:10 amTTN - ORD
1 stop8h 06mFrontier
Deal found 11/25$207
This CheapOair deal was found by Cheapflights users on 11/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:26 pmORD - TTN
1 stop8h 33mFrontier
Sun 12/76:10 amTTN - ORD
1 stop8h 21mFrontier
Deal found 11/26$208

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 November 26, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$162
(CheapOair)

One-way from

$81
(CheapOair)

Popular in

June

Cheapest in

January

Average price

$217
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
Highest demand for flights based on searches. 5% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 26, 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 1/5

9:47 am-11:59 pm

1 stop13h 12m

Trenton-Mercer

Sat 1/10

7:35 pm-3:28 pm

1 stop20h 53m

$162

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Wed 12/10

3:30 pm-5:03 pm

1 stop24h 33m

Trenton-Mercer

Sat 12/13

6:10 am-10:33 pm

1 stop17h 23m

$162

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Wed 12/17

3:30 pm-9:14 pm

1 stop28h 44m

Trenton-Mercer

Tue 12/30

6:10 am-10:33 pm

1 stop17h 23m

$174

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sat 1/10

5:11 pm-1:32 pm

1 stop19h 21m

Trenton-Mercer

Mon 1/12

6:00 am-10:33 pm

1 stop17h 33m

$175

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Tue 1/6

5:11 pm-9:56 pm

1 stop27h 45m

Trenton-Mercer

Thu 1/8

7:58 pm-7:21 pm

1 stop24h 23m

$176

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Sat 12/6

2:26 pm-11:59 pm

1 stop8h 33m

Trenton-Mercer

Sat 12/13

6:10 am-1:16 pm

1 stop8h 06m

$183

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 12/5

2:26 pm-11:59 pm

1 stop8h 33m

Trenton-Mercer

Sat 12/13

6:10 am-1:16 pm

1 stop8h 06m

$187

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Mon 12/15

2:26 pm-11:59 pm

1 stop8h 33m

Trenton-Mercer

Wed 1/7

8:00 am-4:19 pm

1 stop9h 19m

$187

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Sat 12/13

2:26 pm-11:59 pm

1 stop8h 33m

Trenton-Mercer

Wed 1/7

8:00 am-4:19 pm

1 stop9h 19m

$187

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 12/19

5:18 pm-4:18 pm

1 stop22h 00m

Trenton-Mercer

Wed 1/7

8:00 am-4:19 pm

1 stop9h 19m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/23

Showing 1-10 of 41 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, January is the cheapest month in which you can book a flight from Illinois to Trenton, New Jersey (average of $35). 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 November 26, 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 evening tend to be the most expensive. A flight at noon could potentially save you up to 76% 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 $162, Frontier can have you in Trenton, New Jersey from Illinois in 13h 12m. 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, January is the cheapest month in which you can book a flight from Illinois to Trenton, New Jersey (average of $35). 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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