$55 Find Cheap Flights from Trenton to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Trenton to Illinois departing on 11/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Trenton to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Trenton to Illinois, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Trenton to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$110
St. Louis
St. Louis1 stop$110
Chicago
Chicago1 stop$110
St. Louis
St. Louis1 stop$110

Book Cheap Trenton to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Trenton to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Trenton to Illinois

Mon, Nov 17 - Wed, Nov 19
Frontier Logo
6:00 am - 1:17 pmTTN-STL
8h 17m1 stop
Frontier Logo
7:24 pm - 11:49 amSTL-TTN
15h 25m1 stop
$110Frontier
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Thu, Nov 13 - Sat, Nov 15
Frontier Logo
4:27 pm - 12:26 pmTTN-ORD
20h 59m1 stop
Frontier Logo
8:00 am - 11:59 pmORD-TTN
14h 59m1 stop
$110Frontier
Find Deal
Thu, Nov 13 - Wed, Nov 19
Frontier Logo
4:27 pm - 10:20 amTTN-STL
18h 53m1 stop
Frontier Logo
7:24 pm - 11:49 amSTL-TTN
15h 25m1 stop
$111Frontier
Find Deal
Thu, Nov 13 - Sat, Nov 15
Frontier Logo
6:00 am - 12:26 pmTTN-ORD
7h 26m1 stop
Frontier Logo
8:00 am - 11:59 pmORD-TTN
14h 59m1 stop
$111Frontier
Find Deal
Thu, Nov 13 - Thu, Nov 20
Frontier Logo
4:27 pm - 12:26 pmTTN-ORD
20h 59m1 stop
Frontier Logo
3:37 pm - 10:19 amORD-TTN
17h 42m1 stop
$130Frontier
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Thu, Nov 13 - Sun, Nov 16
Frontier Logo
6:00 am - 1:17 pmTTN-STL
8h 17m1 stop
Frontier Logo
2:12 pm - 11:59 pmSTL-TTN
8h 47m1 stop
$143Frontier
Find Deal
Thu, Nov 13 - Sun, Nov 16
Frontier Logo
4:27 pm - 12:26 pmTTN-ORD
20h 59m1 stop
Frontier Logo
5:25 am - 11:59 pmORD-TTN
17h 34m1 stop
$143Frontier
Find Deal
Sat, Nov 15 - Sun, Nov 16
Frontier Logo
8:00 am - 3:08 pmTTN-ORD
8h 08m1 stop
Frontier Logo
5:25 am - 11:59 pmORD-TTN
17h 34m1 stop
$144Frontier
Find Deal
Thu, Jan 8 - Tue, Jan 13
Multiple Airlines Logo
9:59 pm - 2:19 pmTTN-ORD
17h 20m1 stop
Multiple Airlines Logo
6:05 am - 9:15 pmORD-TTN
14h 10m1 stop
$269Multiple Airlines
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Fri, Nov 21 - Mon, Nov 24
Multiple Airlines Logo
4:18 pm - 11:06 pmTTN-ORD
7h 48m1 stop
Multiple Airlines Logo
6:25 pm - 7:13 pmORD-TTN
23h 48m2 stops
$329Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Trenton to Illinois flights

Get data-powered insights and trends into flights from Trenton to Illinois to help you find the cheapest flights, the best time to fly and much more.

How long does a flight from Trenton to Illinois take?

The duration of a flight to Illinois depends on your arrival airport. The shortest route to Illinois from Trenton is to Chicago, which takes 13h 14m.

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Good to know

Cheapest flight$55
Flight from Trenton to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Trenton to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Trenton to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Trenton to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Trenton to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Trenton to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Trenton to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Trenton to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Trenton to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $154 on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $188.

Reviews of the top airline flying from Trenton to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Trenton to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Trenton to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
5.8
FrontierOverall score based on 3123 reviews
5.5Comfort
4.4Entertainment
4.6Food
6.7Crew
6.1Boarding
Airline reviews

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

2.0 MediocreAnonymous, Oct 2025DFW - SAN
Read more Frontier reviews

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

It was well done. It was my first time flying with them and I was nervous b/c I have heard of many cancelled and/or delray flights. Everything went smoothly.

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

The single worst check in experience I could imagine. I’ll never do any business with Frontier or any affiliated company

Too many extra fees, uncomfortable, little leg room. Will not recommend this airline.

Everyone seemed to be in zone 1 for boarding. Maybe break it up a little. Otherwise, smooth flight.

Everything you need to know for your flight from Trenton to Illinois

Information on your arrival and departure airports

Trenton (TTN)

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