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.

$75 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.

7:12 pm - 11:19 pm

TTN

STL

29h 07m

1 stop

4:19 pm - 9:42 am

STL

TTN

16h 23m

1 stop

$160Frontier

Sat, May 2 - Fri, May 8

6:00 am - 1:15 pm

TTN

ORD

8h 15m

1 stop

3:55 pm - 9:37 am

ORD

TTN

16h 42m

1 stop

$160Frontier

Fri, May 1 - Tue, May 5

8:00 am - 3:23 pm

TTN

ORD

8h 23m

1 stop

3:55 pm - 9:37 am

ORD

TTN

16h 42m

1 stop

$174Frontier

Sat, May 2 - Tue, May 5

6:00 am - 11:19 pm

TTN

STL

18h 19m

1 stop

4:59 pm - 6:12 pm

STL

TTN

24h 13m

1 stop

$180Frontier

Thu, Apr 30 - Fri, May 1

8:40 pm - 1:15 pm

TTN

ORD

17h 35m

1 stop

6:00 am - 9:42 am

ORD

TTN

26h 42m

1 stop

$180Frontier

Thu, Apr 30 - Mon, May 4

4:54 pm - 9:27 am

TTN

ORD

17h 33m

1 stop

5:30 pm - 9:42 am

ORD

TTN

15h 12m

1 stop

$181Frontier

Sat, May 9 - Mon, May 18

4:49 pm - 12:21 am

TTN

STL

8h 32m

1 stop

4:19 pm - 9:42 am

STL

TTN

16h 23m

1 stop

$182Frontier

Thu, May 7 - Mon, May 11

10:27 am - 11:13 pm

TTN

ORD

13h 46m

1 stop

5:11 pm - 9:42 am

ORD

TTN

15h 31m

1 stop

$185Frontier

Tue, May 26 - Thu, May 28

11:41 am - 12:23 pm

TTN

ORD

25h 42m

1 stop

10:22 am - 10:56 am

ORD

TTN

23h 34m

1 stop

$189Multiple Airlines

Mon, May 11 - Sun, May 17

12:44 pm - 12:00 pm

TTN

RFD

24h 16m

1 stop

4:45 pm - 11:54 am

RFD

TTN

18h 09m

1 stop

$368Allegiant Air

Mon, May 11 - Sun, May 17

Frontier flights from Trenton, New Jersey to Illinois

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

Frontier

May 1

TTN6:00 amTrenton-Mercer

8h 15m

1 stop

ORD1:15 pmChicago O'Hare Intl

May 5

ORD3:55 pmChicago O'Hare Intl

16h 42m

1 stop

TTN9:37 amTrenton-Mercer

$160

Frontier

May 2

TTN8:00 amTrenton-Mercer

8h 23m

1 stop

ORD3:23 pmChicago O'Hare Intl

May 5

ORD3:55 pmChicago O'Hare Intl

16h 42m

1 stop

TTN9:37 amTrenton-Mercer

$174

Frontier

Apr 30

TTN8:40 pmTrenton-Mercer

17h 35m

1 stop

ORD1:15 pmChicago O'Hare Intl

May 4

ORD6:00 amChicago O'Hare Intl

26h 42m

1 stop

TTN9:42 amTrenton-Mercer

$180

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

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sat 5/2

7:12 pm-11:19 pm

1 stop29h 07m

Lambert-St Louis

Fri 5/8

4:19 pm-9:42 am

1 stop16h 23m

$160

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Fri 5/1

6:00 am-1:15 pm

1 stop8h 15m

Chicago O'Hare Intl

Tue 5/5

3:55 pm-9:37 am

1 stop16h 42m

$160

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 5/2

8:00 am-3:23 pm

1 stop8h 23m

Chicago O'Hare Intl

Tue 5/5

3:55 pm-9:37 am

1 stop16h 42m

$174

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 4/30

6:00 am-11:19 pm

1 stop18h 19m

Lambert-St Louis

Fri 5/1

4:59 pm-6:12 pm

1 stop24h 13m

$180

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Thu 4/30

8:40 pm-1:15 pm

1 stop17h 35m

Chicago O'Hare Intl

Mon 5/4

6:00 am-9:42 am

1 stop26h 42m

$180

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Sat 5/9

4:54 pm-9:27 am

1 stop17h 33m

Chicago O'Hare Intl

Mon 5/18

5:30 pm-9:42 am

1 stop15h 12m

$181

Quickest round-trip

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 5/7

4:49 pm-12:21 am

1 stop8h 32m

Lambert-St Louis

Mon 5/11

4:19 pm-9:42 am

1 stop16h 23m

$182

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Tue 5/26

10:27 am-11:13 pm

1 stop13h 46m

Chicago O'Hare Intl

Thu 5/28

5:11 pm-9:42 am

1 stop15h 31m

$185

TrentonChicago

TTN - ORD

TTNORD

Trenton-Mercer

Mon 5/11

11:41 am-12:23 pm

1 stop25h 42m

Chicago O'Hare Intl

Sun 5/17

10:22 am-10:56 am

1 stop23h 34m

$189

TrentonChicago

TTN - RFD

TTNRFD

Trenton-Mercer

Mon 5/11

12:44 pm-12:00 pm

1 stop24h 16m

Chicago Greater Rockford

Sun 5/17

4:45 pm-11:54 am

1 stop18h 09m

$368

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 45% 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 24m
Direct flights	None

The fastest flight from Trenton, New Jersey to Illinois takes 7h 24m

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.