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.

$120 Cheap Flights from Trenton, New Jersey 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.

11:50 am - 12:15 pm

TTN

ORD

25h 25m

1 stop

7:05 am - 11:38 am

ORD

TTN

27h 33m

2 stops

$226Multiple Airlines

Thu, Jul 9 - Tue, Jul 14

11:50 am - 12:15 pm

TTN

ORD

25h 25m

1 stop

7:05 am - 11:00 am

ORD

TTN

26h 55m

2 stops

$230Multiple Airlines

Thu, Jul 9 - Wed, Jul 15

9:23 am - 11:59 pm

TTN

STL

15h 36m

1 stop

4:09 pm - 8:38 am

STL

TTN

15h 29m

1 stop

$230Frontier

Tue, Jul 14 - Wed, Jul 15

8:33 pm - 11:49 pm

TTN

STL

28h 16m

1 stop

4:09 pm - 8:38 am

STL

TTN

15h 29m

1 stop

$232Frontier

Wed, Jun 24 - Wed, Jul 8

6:05 am - 11:59 pm

TTN

STL

18h 54m

1 stop

4:09 pm - 8:38 am

STL

TTN

15h 29m

1 stop

$244Frontier

Tue, Jul 28 - Sat, Aug 1

6:05 am - 11:59 pm

TTN

STL

18h 54m

1 stop

4:09 pm - 11:40 pm

STL

TTN

6h 31m

1 stop

$247Frontier

Tue, Jul 21 - Fri, Jul 24

8:33 pm - 11:49 pm

TTN

STL

28h 16m

1 stop

4:09 pm - 8:38 am

STL

TTN

15h 29m

1 stop

$249Frontier

Wed, Jul 1 - Mon, Jul 6

8:33 pm - 11:49 pm

TTN

STL

28h 16m

1 stop

4:17 pm - 7:48 pm

STL

TTN

26h 31m

1 stop

$250Frontier

Tue, Jun 16 - Tue, Jun 23

6:05 am - 11:59 pm

TTN

STL

18h 54m

1 stop

4:09 pm - 8:38 am

STL

TTN

15h 29m

1 stop

$258Frontier

Sat, Aug 8 - Sat, Aug 15

6:05 am - 11:10 pm

TTN

ORD

18h 05m

1 stop

5:13 pm - 8:38 am

ORD

TTN

14h 25m

1 stop

$258Frontier

Sat, Jul 18 - Sat, Jul 25

Frontier flights from Trenton, New Jersey to Illinois

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

Frontier

Jul 14

TTN9:23 amTrenton-Mercer

15h 36m

1 stop

STL11:59 pmLambert-St Louis

Jul 15

STL4:09 pmLambert-St Louis

15h 29m

1 stop

TTN8:38 amTrenton-Mercer

$230

Frontier

Jun 24

TTN8:33 pmTrenton-Mercer

28h 16m

1 stop

STL11:49 pmLambert-St Louis

Jul 8

STL4:09 pmLambert-St Louis

15h 29m

1 stop

TTN8:38 amTrenton-Mercer

$232

Frontier

Jul 28

TTN6:05 amTrenton-Mercer

18h 54m

1 stop

STL11:59 pmLambert-St Louis

Aug 1

STL4:09 pmLambert-St Louis

15h 29m

1 stop

TTN8:38 amTrenton-Mercer

$244

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

Cheapest round-trip

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Thu 7/9

11:50 am-12:15 pm

1 stop25h 25m

Chicago O'Hare Intl

Tue 7/14

7:05 am-11:38 am

2 stops27h 33m

$226

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Thu 7/9

11:50 am-12:15 pm

1 stop25h 25m

Chicago O'Hare Intl

Wed 7/15

7:05 am-11:00 am

2 stops26h 55m

$230

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 7/14

9:23 am-11:59 pm

1 stop15h 36m

Lambert-St Louis

Wed 7/15

4:09 pm-8:38 am

1 stop15h 29m

$230

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Wed 6/24

8:33 pm-11:49 pm

1 stop28h 16m

Lambert-St Louis

Wed 7/8

4:09 pm-8:38 am

1 stop15h 29m

$232

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 7/28

6:05 am-11:59 pm

1 stop18h 54m

Lambert-St Louis

Sat 8/1

4:09 pm-8:38 am

1 stop15h 29m

$244

Quickest round-trip

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 7/21

6:05 am-11:59 pm

1 stop18h 54m

Lambert-St Louis

Fri 7/24

4:09 pm-11:40 pm

1 stop6h 31m

$247

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Wed 7/1

8:33 pm-11:49 pm

1 stop28h 16m

Lambert-St Louis

Mon 7/6

4:09 pm-8:38 am

1 stop15h 29m

$249

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 6/16

8:33 pm-11:49 pm

1 stop28h 16m

Lambert-St Louis

Tue 6/23

4:17 pm-7:48 pm

1 stop26h 31m

$250

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sat 8/8

6:05 am-11:59 pm

1 stop18h 54m

Lambert-St Louis

Sat 8/15

4:09 pm-8:38 am

1 stop15h 29m

$258

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 7/18

6:05 am-11:10 pm

1 stop18h 05m

Chicago O'Hare Intl

Sat 7/25

5:13 pm-8:38 am

1 stop14h 25m

$258

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 is the most popular carrier operating from Trenton-Mercer to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Frontier 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 48% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 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	9h 14m
Direct flights	None

The fastest flight from Trenton, New Jersey to Illinois takes 9h 14m

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

Frequently asked questions about flying from Trenton, New Jersey to Illinois

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.