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.

$79 Cheap Flights from Trenton to Illinois in 2026

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Find the cheapest flights from Trenton, New Jersey to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:15 pm - 11:54 pm

TTN

ORD

29h 39m

1 stop

1:27 pm - 6:25 pm

ORD

TTN

27h 58m

1 stop

$156Multiple Airlines

Thu, Apr 30 - Wed, May 6

8:35 pm - 11:19 pm

TTN

STL

27h 44m

1 stop

4:59 pm - 8:31 pm

STL

TTN

26h 32m

1 stop

$160Frontier

Thu, Apr 23 - Sun, Apr 26

3:52 pm - 11:58 pm

TTN

ORD

9h 06m

1 stop

8:24 pm - 3:06 pm

ORD

TTN

17h 42m

1 stop

$160Frontier

Fri, May 15 - Sun, May 17

8:36 am - 11:25 pm

TTN

STL

15h 49m

1 stop

4:59 pm - 11:59 pm

STL

TTN

6h 00m

1 stop

$167Frontier

Mon, Apr 13 - Mon, Apr 20

7:15 pm - 11:54 pm

TTN

ORD

29h 39m

1 stop

4:28 pm - 9:54 am

ORD

TTN

16h 26m

2 stops

$176Multiple Airlines

Thu, Apr 30 - Wed, May 6

3:04 pm - 11:58 pm

TTN

STL

9h 54m

1 stop

4:59 pm - 10:36 pm

STL

TTN

28h 37m

1 stop

$181Frontier

Fri, Apr 10 - Tue, Apr 14

7:15 pm - 11:41 pm

TTN

ORD

29h 26m

1 stop

5:14 pm - 6:30 pm

ORD

TTN

24h 16m

1 stop

$181Frontier

Fri, May 29 - Sun, May 31

7:15 am - 11:36 pm

TTN

ORD

17h 21m

1 stop

4:38 pm - 2:06 pm

ORD

TTN

20h 28m

1 stop

$183Frontier

Sun, Apr 12 - Fri, Apr 17

6:41 pm - 9:17 pm

TTN

ORD

27h 36m

1 stop

4:38 pm - 2:06 pm

ORD

TTN

20h 28m

1 stop

$192Frontier

Mon, Apr 13 - Fri, Apr 17

11:24 am - 9:04 am

TTN

RFD

22h 40m

1 stop

7:42 pm - 10:34 am

RFD

TTN

13h 52m

1 stop

$599Allegiant Air

Fri, Mar 13 - Sun, Mar 15

Frontier flights from Trenton, New Jersey to Illinois

Our best Frontier deals on Trenton, New Jersey to Illinois flight tickets

Frontier

May 15

TTN3:52 pmTrenton-Mercer

9h 06m

1 stop

ORD11:58 pmChicago O'Hare Intl

May 17

ORD8:24 pmChicago O'Hare Intl

17h 42m

1 stop

TTN3:06 pmTrenton-Mercer

$160

Frontier

Apr 13

TTN8:36 amTrenton-Mercer

15h 49m

1 stop

STL11:25 pmLambert-St Louis

Apr 20

STL4:59 pmLambert-St Louis

6h 00m

1 stop

TTN11:59 pmTrenton-Mercer

$167

Frontier

May 1

TTN3:52 pmTrenton-Mercer

9h 06m

1 stop

ORD11:58 pmChicago O'Hare Intl

May 4

ORD6:00 amChicago O'Hare Intl

16h 59m

1 stop

TTN11:59 pmTrenton-Mercer

$181

momondo Fare Finder

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

Thu 4/30

7:15 pm-11:54 pm

1 stop29h 39m

Chicago O'Hare Intl

Wed 5/6

1:27 pm-6:25 pm

1 stop27h 58m

$156

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 4/23

8:35 pm-11:19 pm

1 stop27h 44m

Lambert-St Louis

Sun 4/26

4:59 pm-8:31 pm

1 stop26h 32m

$160

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Fri 5/15

3:52 pm-11:58 pm

1 stop9h 06m

Chicago O'Hare Intl

Sun 5/17

8:24 pm-3:06 pm

1 stop17h 42m

$160

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 4/13

8:36 am-11:25 pm

1 stop15h 49m

Lambert-St Louis

Mon 4/20

4:59 pm-11:59 pm

1 stop6h 00m

$167

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Thu 4/30

7:15 pm-11:54 pm

1 stop29h 39m

Chicago O'Hare Intl

Wed 5/6

4:28 pm-9:54 am

2 stops16h 26m

$176

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 4/10

3:04 pm-11:58 pm

1 stop9h 54m

Lambert-St Louis

Tue 4/14

4:59 pm-10:36 pm

1 stop28h 37m

$181

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Fri 5/29

7:15 pm-11:41 pm

1 stop29h 26m

Chicago O'Hare Intl

Sun 5/31

5:14 pm-6:30 pm

1 stop24h 16m

$181

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sun 4/12

7:15 am-11:36 pm

1 stop17h 21m

Chicago O'Hare Intl

Fri 4/17

4:38 pm-2:06 pm

1 stop20h 28m

$183

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Mon 4/13

6:41 pm-9:17 pm

1 stop27h 36m

Chicago O'Hare Intl

Fri 4/17

4:38 pm-2:06 pm

1 stop20h 28m

$192

TrentonChicago

TTN - RFD

TTNRFD

Trenton-Mercer

Fri 3/13

11:24 am-9:04 am

1 stop22h 40m

Chicago Greater Rockford

Sun 3/15

7:42 pm-10:34 am

1 stop13h 52m

$599

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 airline that flies from Trenton-Mercer to Illinois?

Frontier and Allegiant Air are the most popular carriers operating from Trenton-Mercer to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Spirit Airlines are the top three most popular airlines that fly to Illinois from Trenton, New Jersey according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

Fastest flight time	7h 37m
Direct flights	None

The fastest flight from Trenton, New Jersey to Illinois takes 7h 37m

There are no direct flights from Trenton, New Jersey to Illinois. There are no popular flight routes from Trenton, New Jersey to Illinois.

Search flight deals

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.