Cheap flights from Trenton, New Jersey to Illinois from $99

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Trenton, New Jersey to Illinois departing on 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Trenton, New Jersey to Illinois

Cheap round-trip flights

Frontier Logo
7:51 pm - 1:56 pmTTN-ORD
19h 05m1 stop
Frontier Logo
9:08 am - 11:59 pmORD-TTN
13h 51m1 stop
$198Frontier
Find Deal
Wed, Aug 13 - Sat, Aug 16
Frontier Logo
6:24 pm - 1:05 pmTTN-ORD
19h 41m1 stop
Frontier Logo
8:00 am - 11:00 amORD-TTN
26h 00m1 stop
$203Frontier
Find Deal
Sat, Aug 30 - Sat, Sep 6
Frontier Logo
5:15 pm - 10:14 amTTN-ORD
17h 59m1 stop
Frontier Logo
9:08 am - 11:59 pmORD-TTN
13h 51m1 stop
$205Frontier
Find Deal
Tue, Aug 12 - Sat, Aug 16
Frontier Logo
8:00 am - 6:41 pmTTN-ORD
11h 41m1 stop
Frontier Logo
6:10 am - 6:40 pmORD-TTN
11h 30m1 stop
$208Frontier
Find Deal
Sat, Aug 30 - Sun, Aug 31
Frontier Logo
4:57 pm - 7:44 pmTTN-ORD
27h 47m1 stop
Frontier Logo
8:00 am - 11:00 amORD-TTN
26h 00m1 stop
$209Frontier
Find Deal
Thu, Sep 4 - Sat, Sep 6
Frontier Logo
9:29 am - 7:12 pmTTN-ORD
10h 43m1 stop
Frontier Logo
4:53 pm - 4:23 pmORD-TTN
22h 30m1 stop
$210Frontier
Find Deal
Sat, Aug 16 - Sun, Aug 17
Frontier Logo
5:15 pm - 10:14 amTTN-ORD
17h 59m1 stop
Frontier Logo
5:28 pm - 8:41 amORD-TTN
14h 13m1 stop
$214Frontier
Find Deal
Tue, Aug 12 - Fri, Aug 15
Frontier Logo
8:30 am - 11:47 pmTTN-STL
16h 17m1 stop
Frontier Logo
5:40 pm - 11:59 pmSTL-TTN
29h 19m1 stop
$215Frontier
Find Deal
Tue, Aug 12 - Fri, Aug 15
Frontier Logo
8:00 am - 2:53 pmTTN-ORD
7h 53m1 stop
Frontier Logo
6:10 am - 11:47 pmORD-TTN
16h 37m1 stop
$215Frontier
Find Deal
Sat, Oct 11 - Mon, Oct 13
Frontier Logo
5:15 pm - 11:31 pmTTN-ORD
7h 16m1 stop
Frontier Logo
5:01 am - 11:22 amORD-TTN
5h 21m1 stop
$216Frontier
Find Deal
Fri, Aug 15 - Mon, Aug 18

Frontier flights from Trenton, New Jersey to Illinois

Our best Frontier deals on Trenton, New Jersey to Illinois flight tickets
Frontier
Aug 13
TTN7:51 pmTrenton-Mercer
19h 05m
1 stop
ORD1:56 pmChicago O'Hare Intl
Aug 16
ORD9:08 amChicago O'Hare Intl
13h 51m
1 stop
TTN11:59 pmTrenton-Mercer
Frontier
Aug 30
TTN6:24 pmTrenton-Mercer
19h 41m
1 stop
ORD1:05 pmChicago O'Hare Intl
Sep 6
ORD8:00 amChicago O'Hare Intl
26h 00m
1 stop
TTN11:00 amTrenton-Mercer
Frontier
Aug 12
TTN5:15 pmTrenton-Mercer
17h 59m
1 stop
ORD10:14 amChicago O'Hare Intl
Aug 16
ORD9:08 amChicago O'Hare Intl
13h 51m
1 stop
TTN11:59 pmTrenton-Mercer

momondo Fare Finder

 
Customize your flight search to find flights from Trenton, New Jersey to Illinois 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, momondo users made 832,500 searches. Data last updated August 2, 2025.
Use the filters below to find and compare flights from Trenton, New Jersey to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Wed 8/13

7:51 pm-1:56 pm

1 stop19h 05m

Chicago O'Hare Intl

Sat 8/16

9:08 am-11:59 pm

1 stop13h 51m

$198

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 8/30

6:24 pm-1:05 pm

1 stop19h 41m

Chicago O'Hare Intl

Sat 9/6

8:00 am-11:00 am

1 stop26h 00m

$203

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Tue 8/12

5:15 pm-10:14 am

1 stop17h 59m

Chicago O'Hare Intl

Sat 8/16

9:08 am-11:59 pm

1 stop13h 51m

$205

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 8/30

8:00 am-6:41 pm

1 stop11h 41m

Chicago O'Hare Intl

Sun 8/31

6:10 am-6:40 pm

1 stop11h 30m

$208

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Thu 9/4

4:57 pm-7:44 pm

1 stop27h 47m

Chicago O'Hare Intl

Sat 9/6

8:00 am-11:00 am

1 stop26h 00m

$209

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 8/16

9:29 am-7:12 pm

1 stop10h 43m

Chicago O'Hare Intl

Sun 8/17

4:53 pm-4:23 pm

1 stop22h 30m

$210

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Tue 8/12

5:15 pm-10:14 am

1 stop17h 59m

Chicago O'Hare Intl

Fri 8/15

5:28 pm-8:41 am

1 stop14h 13m

$214

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 8/12

8:30 am-11:47 pm

1 stop16h 17m

Lambert-St Louis

Fri 8/15

5:40 pm-11:59 pm

1 stop29h 19m

$215

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 10/11

8:00 am-2:53 pm

1 stop7h 53m

Chicago O'Hare Intl

Mon 10/13

6:10 am-11:47 pm

1 stop16h 37m

$215

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Fri 8/15

5:15 pm-11:31 pm

1 stop7h 16m

Chicago O'Hare Intl

Mon 8/18

5:01 am-11:22 am

1 stop5h 21m

$216

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Trenton, New Jersey to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Trenton, New Jersey to Illinois is on a Wednesday when prices can be found for as low as $79. Flights from Trenton, New Jersey to Illinois on a Sunday will generally be more expensive and average around $270. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Trenton, New Jersey to Illinois during this time can be as low as $154. Flights in the morning are often more expensive with an average ticket price of $188.

Cheap Trenton, New Jersey to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Trenton, New Jersey to Illinois

Best Price Found

$99

Fastest flight time

5h 34m

Direct flights

None

Airports in Illinois

2 airports
The best one-way flight to Illinois from Trenton, New Jersey in the past 72 hours is $99. The best round-trip flight deal from Trenton, New Jersey to Illinois found on momondo in the last 72 hours is $198.
The fastest flight from Trenton, New Jersey to Illinois takes 5h 34m
There are no direct flights from Trenton, New Jersey to Illinois. Popular non-direct routes for this connection are Trenton-Mercer Airport - Chicago O'Hare Intl Airport and Trenton-Mercer Airport - Lambert-St Louis Airport.
There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Lambert-St Louis (STL)

  • When did momondo last update prices for flights from Trenton-Mercer Airport to Illinois?

    Prices for flights from Trenton-Mercer Airport to Illinois were last updated today.

  • How old do you have to be to fly from Trenton-Mercer Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Trenton-Mercer Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.


Why use momondo?

Why should I use momondo to find a flight deal from Trenton to Illinois?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Trenton to Illinois. momondo saves you time and could save you money on your trip.

Can I find flights from Trenton to Illinois with flexible booking policies on momondo?

Flights from Trenton to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Trenton to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Trenton.

I’m not ready to book a flight from Trenton to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Trenton are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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Thu 8/7
Thu 8/14

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