HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Trenton

$88+ Cheap flights from Illinois to Trenton, NJ (TTN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TTN
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Trenton with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Trenton

Keep the following information in mind while searching for Illinois to Trenton flight deals. Data was last updated April 22, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$188
(Frontier)

One-way from

$88
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$206
Provider with most accurate pricing for Chicago (CHI)-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-New York (NYC) flights.
Search Deals
From Illinois to Trenton-Mercer
Search Deals
One-way flight from Illinois to Trenton-Mercer
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Illinois to Trenton

Cheapest flights from Illinois to Trenton
Explore the most affordable flight options available from Illinois to Trenton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2025.

This CheapOair deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:03 pmORD - TTN
1 stop22h 12mFrontier
Wed 5/288:00 amTTN - ORD
1 stop17h 20mFrontier
Deal found 4/21$181
This CheapOair deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:41 pmSTL - TTN
1 stop18h 16mFrontier
Sat 5/38:00 amTTN - STL
1 stop17h 06mFrontier
Deal found 4/22$181

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Trenton 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, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
Use the filters below to find and compare flights from Illinois to Trenton that are best for you.

Fly from

Illinois

Fly to

Trenton

Route

Depart

Return

Price

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Sat 5/24

5:03 pm-4:15 pm

1 stop22h 12m

Trenton-Mercer

Wed 5/28

8:00 am-12:20 am

1 stop17h 20m

$181

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Wed 4/30

5:41 pm-12:57 pm

1 stop18h 16m

Trenton-Mercer

Sat 5/3

8:00 am-12:06 am

1 stop17h 06m

$181

ChicagoTrenton

ORD - TTN

ORDTTN

Chicago O'Hare Intl

Sat 5/17

4:15 pm-11:52 pm

1 stop6h 37m

$88

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Wed 5/28

5:45 pm-4:15 pm

1 stop21h 30m

$96

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Best time to book a flight from Illinois to Trenton

Have a flexible travel schedule? Discover the best time to fly to Trenton from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Illinois to Trenton, New Jersey?

Currently, January is the cheapest month in which you can book a flight from Illinois to Trenton, New Jersey (average of $73). Flying from Illinois to Trenton, New Jersey in July is currently the most expensive (average of $147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to TTN?

Find hourly flight availability from Illinois to Trenton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 22, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Trenton, New Jersey as you normally would.

Rainfall in Trenton by month

Plan your trip to Trenton by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Trenton, New Jersey ranges from 2.9 - 4.8 inches per month. July is typically the wettest month, when rainfall can reach 4.8 in. February is typically the driest time to visit Trenton, New Jersey when rainfall is around 2.9 in.

Temperature in Trenton by month

Plan your trip to Trenton by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Trenton, New Jersey, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing Trenton

Get insights into the airlines that provide service to Trenton. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Trenton. Reviews last updated April 22, 2025.
Frontier
6.0
Okay
3,283 reviews

Crew

6.8

Boarding

6.2

Comfort

5.6

Entertainment

4.6

Food

4.8

Overall

6.0

Reviews

1 / 20
2.0
Mediocre

Mood Happy,Mar 2025

ONT - DFW

Very bad experience. Next time not going to this flight
Frontier
6.0
Okay
3,283 reviews
Frontier
6.0
Okay
3,283 reviews

Crew

6.8

Boarding

6.2

Comfort

5.6

Entertainment

4.6

Food

4.8

Overall

6.0

Reviews

1 / 20
2.0
Mediocre

Mood Happy,Mar 2025

ONT - DFW

Very bad experience. Next time not going to this flight

Related info for your journey

Find useful and relevant information for your journey from Illinois to Trenton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Trenton from Illinois?

    Most people fly into Trenton-Mercer (TTN) if they book a flight to Trenton from Illinois. Trenton-Mercer is conveniently located just 4.8 mi from Trenton’s city center.

  • Can I find deals for flights from Illinois to Trenton that include hotel bookings?

    Yes. In addition to deals on Illinois to Trenton flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Trenton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Trenton.

  • Can I find deals for business class flights from Illinois to Trenton?

    Yes. Cheapflights offers flight deals from Illinois to Trenton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Trenton, New Jersey?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Trenton, New Jersey (average of $73). Flying from Illinois to Trenton, New Jersey in July is currently the most expensive (average of $147). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Trenton

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Dallas/Fort Worth to John F Kennedy Intl flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
San Francisco to Newark flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to Newark flights
O'Hare Intl to LaGuardia flights
Los Angeles to LaGuardia flights
O'Hare Intl to John F Kennedy Intl flights
Seattle to John F Kennedy Intl flights
Atlanta to LaGuardia flights
Seattle to Newark flights
Fort Lauderdale to Newark flights
Atlanta to Newark flights
Atlanta to John F Kennedy Intl flights
Fort Lauderdale to LaGuardia flights
Miami to Newark flights
Orlando to Newark flights
Hobby to John F Kennedy Intl flights
Hobby to Newark flights
O'Hare Intl to Newark flights
Miami to John F Kennedy Intl flights
San Francisco to LaGuardia flights
Miami to LaGuardia flights
Hobby to LaGuardia flights
Fort Lauderdale to John F Kennedy Intl flights
Orlando to John F Kennedy Intl flights
Orlando to LaGuardia flights
Ontario to John F Kennedy Intl flights
Burbank to Newark flights
Midway to John F Kennedy Intl flights
Charlotte to John F Kennedy Intl flights
Midway to Newark flights
Denver to Newark flights
Tampa to Newark flights
George Bush Intcntl to John F Kennedy Intl flights
San Diego to John F Kennedy Intl flights
George Bush Intcntl to Newark flights
Seattle to LaGuardia flights
George Bush Intcntl to LaGuardia flights
Denver to John F Kennedy Intl flights
Ontario to Newark flights
Tampa to John F Kennedy Intl flights
Sky Harbor Intl to John F Kennedy Intl flights
Minneapolis to LaGuardia flights
Dallas/Fort Worth to Philadelphia flights
Austin to Newark flights
Raleigh to John F Kennedy Intl flights
San Diego to Newark flights

Top airline flying from Illinois to Trenton

Discover the top airline that operate flights from Illinois to Trenton. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$198FlexibilityNo cancel feeOn-time62%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.