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Trenton

$72+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TTN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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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 August 14, 2025.

Round-trip from

$151
(Mytrip)

One-way from

$72
(Booking.com)

Popular in

December

Cheapest in

January

Average price

$218
From Illinois to Trenton-Mercer
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One-way flight from Illinois to Trenton-Mercer
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Highest demand for flights based on searches. 3% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/14. 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.
Fri 9/195:10 amORD - TTN
1 stop5h 24mFrontier
Sun 9/214:57 pmTTN - ORD
1 stop27h 47mFrontier
Deal found 8/14$151
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Thu 10/24:00 pmSTL - TTN
1 stop18h 34mFrontier
Sun 10/510:30 amTTN - STL
1 stop5h 34mFrontier
Deal found 8/14$189
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Fri 9/128:49 pmORD - TTN
1 stop13h 11mFrontier
Sun 9/144:57 pmTTN - ORD
1 stop27h 47mFrontier
Deal found 8/14$190
This Booking.com deal was found by Cheapflights users on 8/14. 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 9/118:49 pmORD - TTN
1 stop13h 11mFrontier
Sun 9/144:57 pmTTN - ORD
1 stop27h 47mFrontier
Deal found 8/14$192
This Booking.com deal was found by Cheapflights users on 8/13. 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.
Thu 9/118:49 pmORD - TTN
1 stop13h 11mFrontier
Thu 9/184:57 pmTTN - ORD
1 stop27h 47mFrontier
Deal found 8/13$193
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Thu 8/216:00 pmORD - TTN
1 stop15h 08mFrontier
Thu 8/286:00 amTTN - ORD
1 stop13h 41mFrontier
Deal found 8/14$195
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/35:10 amORD - TTN
1 stop5h 24mFrontier
Fri 10/1010:19 amTTN - ORD
1 stop29h 45mFrontier
Deal found 8/13$200
This Booking.com deal was found by Cheapflights users on 8/12. 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.
Sat 10/48:00 amORD - TTN
1 stop26h 00mFrontier
Mon 10/612:30 pmTTN - ORD
1 stop12h 28mFrontier
Deal found 8/12$234
This Mytrip deal was found by Cheapflights users on 8/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/169:08 amORD - TTN
1 stop6h 40mFrontier
Mon 8/1812:48 pmTTN - ORD
1 stop12h 34mFrontier
Deal found 8/12$237
This Gotogate deal was found by Cheapflights users on 8/14. 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 10/28:05 amORD - TTN
1 stop27h 10mFrontier
Sun 10/54:57 pmTTN - ORD
1 stop27h 47mFrontier
Deal found 8/14$240
This Booking.com deal was found by Cheapflights users on 8/12. 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.
Wed 9/2411:45 amORD - TTN
1 stop20h 47mFrontier
Fri 9/2612:30 pmTTN - ORD
1 stop23h 57mFrontier
Deal found 8/12$244
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/254:00 pmSTL - TTN
1 stop18h 34mFrontier
Sun 9/284:57 pmTTN - STL
1 stop21h 05mFrontier
Deal found 8/13$262

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 August 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

Fri 9/19

5:10 am-11:34 am

1 stop5h 24m

Trenton-Mercer

Sun 9/21

4:57 pm-7:44 pm

1 stop27h 47m

$151

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 10/2

4:00 pm-11:34 am

1 stop18h 34m

Trenton-Mercer

Sun 10/5

10:30 am-3:04 pm

1 stop5h 34m

$189

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 9/12

8:49 pm-11:00 am

1 stop13h 11m

Trenton-Mercer

Sun 9/14

4:57 pm-7:44 pm

1 stop27h 47m

$190

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Thu 9/11

8:49 pm-11:00 am

1 stop13h 11m

Trenton-Mercer

Sun 9/14

4:57 pm-7:44 pm

1 stop27h 47m

$192

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Thu 9/11

8:49 pm-11:00 am

1 stop13h 11m

Trenton-Mercer

Thu 9/18

4:57 pm-7:44 pm

1 stop27h 47m

$193

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 10/3

5:10 am-11:34 am

1 stop5h 24m

Trenton-Mercer

Fri 10/10

10:19 am-3:04 pm

1 stop29h 45m

$200

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Fri 10/3

5:10 am-11:34 am

1 stop5h 24m

Trenton-Mercer

Mon 10/6

12:30 pm-11:58 pm

1 stop12h 28m

$232

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Sat 10/4

8:00 am-11:00 am

1 stop26h 00m

Trenton-Mercer

Mon 10/6

12:30 pm-11:58 pm

1 stop12h 28m

$234

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Thu 10/2

8:05 am-12:15 pm

1 stop27h 10m

Trenton-Mercer

Sun 10/5

4:57 pm-7:44 pm

1 stop27h 47m

$240

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Wed 9/24

11:45 am-9:32 am

1 stop20h 47m

Trenton-Mercer

Fri 9/26

12:30 pm-11:27 am

1 stop23h 57m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 43 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 $73). Flying from Illinois to Trenton, New Jersey in June is currently the most expensive (average of $153). 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 August 14, 2025.

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

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.

  • 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 $73). Flying from Illinois to Trenton, New Jersey in June is currently the most expensive (average of $153). 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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Alternative routes for Illinois to Trenton

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Top airline flying from Illinois to Trenton

Discover the top airline that operate flights from Illinois to Trenton. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$208FlexibilityNo cancel feeOn-time62%

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