$64+ Cheap flights from Trenton, NJ (TTN) to Illinois
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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — ORD
Feb 28 — Mar 71
1 adult, Economy
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Find cheap flights from Trenton to Illinois 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
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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 Trenton to Illinois
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Cheapest flights from Trenton to IllinoisExplore the most affordable flight options available from Trenton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Trenton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Tue 2/248:30 am
ORD
- TTN
1 stop14h 09m
Frontier
Deal found 1/28![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- STL
1 stop13h 05m
Frontier
Wed 2/253:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$138
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Thu 2/1912:01 pm
ORD
- TTN
1 stop10h 38m
Frontier
Deal found 1/26![Frontier logo]()
$138
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Wed 2/258:30 am
ORD
- TTN
1 stop24h 16m
Frontier
Deal found 1/26![Frontier logo]()
$154
This CheapOair deal was found by Cheapflights users on 1/27. 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 2/258:00 am
TTN
- ORD
1 stop27h 46m
Frontier
Wed 3/48:30 am
ORD
- TTN
1 stop24h 16m
Frontier
Deal found 1/27![Frontier logo]()
$159
This Frontier deal was found by Cheapflights users on 1/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2112:45 pm
TTN
- STL
1 stop12h 14m
Frontier
Sat 2/2812:36 pm
STL
- TTN
1 stop10h 03m
Frontier
Deal found 1/28![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Thu 2/2611:55 am
ORD
- TTN
1 stop10h 44m
Frontier
Deal found 1/27![Frontier logo]()
$175
This Gotogate deal was found by Cheapflights users on 1/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Fri 2/272:13 pm
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/27![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:00 am
TTN
- ORD
1 stop10h 25m
Frontier
Mon 4/206:57 am
ORD
- TTN
1 stop8h 55m
Frontier
Deal found 1/26![Frontier logo]()
$181
This Mytrip deal was found by Cheapflights users on 1/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Fri 2/209:07 pm
ORD
- TTN
1 stop25h 32m
Frontier
Deal found 1/26![Frontier logo]()
$185
This CheapOair deal was found by Cheapflights users on 1/27. 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.
Mon 2/236:00 am
TTN
- STL
1 stop18h 59m
Frontier
Tue 2/243:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$186
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Fri 2/272:13 pm
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/27![Frontier logo]()
$189
Best flights from Trenton to IllinoisDiscover carefully curated flight deals from Trenton to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 29, 2026.
Discover carefully curated flight deals from Trenton to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 29, 2026.
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Tue 2/248:30 am
ORD
- TTN
1 stop14h 09m
Frontier
Deal found 1/28![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:45 am
TTN
- ORD
2 stops29h 06m
Multiple Airlines
Wed 2/2512:44 pm
ORD
- TTN
1 stop9h 55m
Multiple Airlines
Deal found 1/26![Multiple Airlines logo]()
$190
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- STL
1 stop13h 05m
Frontier
Wed 2/253:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$138
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Wed 2/258:30 am
ORD
- TTN
1 stop24h 16m
Frontier
Deal found 1/26![Frontier logo]()
$154
This Frontier deal was found by Cheapflights users on 1/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2112:45 pm
TTN
- STL
1 stop12h 14m
Frontier
Sat 2/2812:36 pm
STL
- TTN
1 stop10h 03m
Frontier
Deal found 1/28![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Thu 2/2611:55 am
ORD
- TTN
1 stop10h 44m
Frontier
Deal found 1/27![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/186:00 am
TTN
- ORD
1 stop10h 25m
Frontier
Mon 4/206:57 am
ORD
- TTN
1 stop8h 55m
Frontier
Deal found 1/26![Frontier logo]()
$181
This Expedia deal was found by Cheapflights users on 1/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:00 am
TTN
- ORD
1 stop27h 46m
Frontier
Sat 2/288:15 am
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/28![Frontier logo]()
$185
This CheapOair deal was found by Cheapflights users on 1/27. 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.
Mon 2/236:00 am
TTN
- STL
1 stop18h 59m
Frontier
Tue 2/243:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$186
This Frontier deal was found by Cheapflights users on 1/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Fri 2/272:13 pm
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/28![Frontier logo]()
$199
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Thu 2/2611:55 am
ORD
- TTN
1 stop10h 44m
Frontier
Deal found 1/27![Frontier logo]()
$202
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/78:19 pm
TTN
- ORD
1 stop13h 51m
Frontier
Sat 2/148:15 am
ORD
- TTN
1 stop9h 58m
Frontier
Deal found 1/26![Frontier logo]()
$202
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/43:21 pm
TTN
- ORD
1 stop20h 20m
Frontier
Thu 2/53:55 pm
ORD
- TTN
1 stop18h 06m
Frontier
Deal found 1/27![Frontier logo]()
$204
This CheapOair deal was found by Cheapflights users on 1/27. 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 3/76:00 am
TTN
- STL
1 stop24h 57m
Frontier
Tue 3/104:51 pm
STL
- TTN
1 stop6h 08m
Frontier
Deal found 1/27![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Mon 2/232:13 pm
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/27![Frontier logo]()
$205
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:49 am
TTN
- STL
1 stop13h 30m
Frontier
Sun 5/104:55 pm
STL
- TTN
1 stop6h 04m
Frontier
Deal found 1/26![Frontier logo]()
$236
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/89:06 pm
TTN
- STL
1 stop13h 15m
Frontier
Tue 2/103:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$255
This CheapOair deal was found by Cheapflights users on 1/26. 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.
Thu 4/1610:49 am
TTN
- STL
1 stop13h 30m
Frontier
Sun 4/194:55 pm
STL
- TTN
1 stop22h 57m
Frontier
Deal found 1/26![Frontier logo]()
$287
This CheapOair deal was found by Cheapflights users on 1/29. 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.
Thu 2/1910:31 am
TTN
- STL
1 stop14h 28m
Frontier
Fri 2/203:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/29![Frontier logo]()
$306
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:37 pm
TTN
- STL
1 stop6h 42m
Frontier
Sun 5/174:55 pm
STL
- TTN
1 stop6h 04m
Frontier
Deal found 1/27![Frontier logo]()
$310
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/196:00 am
TTN
- STL
1 stop26h 22m
Frontier
Mon 3/238:10 pm
STL
- TTN
1 stop26h 49m
Frontier
Deal found 1/27![Frontier logo]()
$339
This CheapOair deal was found by Cheapflights users on 1/27. 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.
Tue 2/248:00 am
TTN
- STL
1 stop15h 27m
Frontier
Sun 3/13:49 pm
STL
- TTN
1 stop18h 20m
Frontier
Deal found 1/27![Frontier logo]()
$342
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- STL
1 stop13h 05m
Frontier
Thu 2/263:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/26![Frontier logo]()
$394
Last-minute flights from Trenton to IllinoisDiscover last-minute flight deals from Trenton to Illinois. Data last updated January 29, 2026 and is based on user searches.
Discover last-minute flight deals from Trenton to Illinois. Data last updated January 29, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Tue 2/248:30 am
ORD
- TTN
1 stop14h 09m
Frontier
Deal found 1/28![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 1/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Thu 2/1912:01 pm
ORD
- TTN
1 stop10h 38m
Frontier
Deal found 1/26![Frontier logo]()
$138
This Mytrip deal was found by Cheapflights users on 1/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Fri 2/209:07 pm
ORD
- TTN
1 stop25h 32m
Frontier
Deal found 1/26![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 1/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2112:45 pm
TTN
- STL
1 stop12h 14m
Frontier
Sat 2/2812:36 pm
STL
- TTN
1 stop10h 03m
Frontier
Deal found 1/28![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- STL
1 stop13h 05m
Frontier
Wed 2/253:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$138
This Expedia deal was found by Cheapflights users on 1/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Wed 2/258:30 am
ORD
- TTN
1 stop24h 16m
Frontier
Deal found 1/26![Frontier logo]()
$154
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Thu 2/2611:55 am
ORD
- TTN
1 stop10h 44m
Frontier
Deal found 1/27![Frontier logo]()
$175
This CheapOair deal was found by Cheapflights users on 1/27. 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.
Mon 2/236:00 am
TTN
- STL
1 stop18h 59m
Frontier
Tue 2/243:49 pm
STL
- TTN
1 stop6h 50m
Frontier
Deal found 1/27![Frontier logo]()
$186
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Fri 2/272:13 pm
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/27![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:45 am
TTN
- ORD
2 stops29h 06m
Multiple Airlines
Wed 2/2512:44 pm
ORD
- TTN
1 stop9h 55m
Multiple Airlines
Deal found 1/26![Multiple Airlines logo]()
$190
This Gotogate deal was found by Cheapflights users on 1/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Fri 2/272:13 pm
ORD
- TTN
1 stop8h 46m
Frontier
Deal found 1/27![Frontier logo]()
$179
This CheapOair deal was found by Cheapflights users on 1/27. 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 2/258:00 am
TTN
- ORD
1 stop27h 46m
Frontier
Wed 3/48:30 am
ORD
- TTN
1 stop24h 16m
Frontier
Deal found 1/27![Frontier logo]()
$159
One-way flights from Trenton to IllinoisSearch for one-way flight options from Trenton to Illinois. Find affordable one-way fares based on user searches. Data last updated January 29, 2026.
Search for one-way flight options from Trenton to Illinois. Find affordable one-way fares based on user searches. Data last updated January 29, 2026.
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Deal found 1/27![Frontier logo]()
$64
This Trip.com deal was found by Cheapflights users on 1/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:00 am
TTN
- ORD
1 stop8h 52m
Frontier
Deal found 1/29![Frontier logo]()
$75
This Frontier deal was found by Cheapflights users on 1/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2311:54 am
TTN
- ORD
1 stop12h 21m
Frontier
Deal found 1/29![Frontier logo]()
$80
This Trip.com deal was found by Cheapflights users on 1/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/43:21 pm
TTN
- STL
1 stop9h 12m
Frontier
Deal found 1/27![Frontier logo]()
$84
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/203:52 pm
TTN
- ORD
1 stop9h 06m
Frontier
Deal found 1/28![Frontier logo]()
$85
This Super.com deal was found by Cheapflights users on 1/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:26 pm
TTN
- ORD
1 stop11h 10m
Frontier
Deal found 1/27![Frontier logo]()
$87
This Trip.com deal was found by Cheapflights users on 1/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:00 am
TTN
- ORD
1 stop18h 36m
Frontier
Deal found 1/27![Frontier logo]()
$91
This Expedia deal was found by Cheapflights users on 1/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/73:04 pm
TTN
- ORD
1 stop9h 34m
Frontier
Deal found 1/29![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 1/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:00 am
TTN
- ORD
1 stop10h 38m
Frontier
Deal found 1/27![Frontier logo]()
$100
This Booking.com deal was found by Cheapflights users on 1/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/176:00 am
TTN
- ORD
1 stop10h 28m
Frontier
Deal found 1/29![Frontier logo]()
$101
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/73:04 pm
TTN
- STL
1 stop15h 53m
Frontier
Deal found 1/28![Frontier logo]()
$105
This Mytrip deal was found by Cheapflights users on 1/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/96:58 pm
TTN
- ORD
1 stop29h 40m
Frontier
Deal found 1/29![Frontier logo]()
$105
Find flight deals from Trenton to Illinois
Keep the following information in mind while searching for Trenton to Illinois flight deals. Data was last updated January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $134 (Booking.com) |
One-way from | $64 (Frontier) |
Popular in | August |
Cheapest in | January |
Average price | $187 |
Cheapflights Fare Finder
Customize your flight search to find flights from Trenton to Illinois 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 January 29, 2026.
Use the filters below to find and compare flights from Trenton to Illinois that are best for you.
Fly from
Trenton
Fly to
Illinois
Route
Depart
Return
Price
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Wed 2/18
8:00 am-3:52 pm
1 stop8h 52m
Chicago O'Hare Intl
Tue 2/24
8:30 am-11:39 pm
1 stop14h 09m
$134
TrentonSt. Louis
TTN - STL
TTNSTL
Trenton-Mercer
Mon 2/23
11:54 am-11:59 pm
1 stop13h 05m
Lambert-St Louis
Wed 2/25
3:49 pm-11:39 pm
1 stop6h 50m
$138
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Mon 2/23
11:54 am-11:15 pm
1 stop12h 21m
Chicago O'Hare Intl
Wed 2/25
8:30 am-9:46 am
1 stop24h 16m
$154
TrentonSt. Louis
TTN - STL
TTNSTL
Trenton-Mercer
Sat 2/21
12:45 pm-11:59 pm
1 stop12h 14m
Lambert-St Louis
Sat 2/28
12:36 pm-11:39 pm
1 stop10h 03m
$175
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Mon 2/23
11:54 am-11:15 pm
1 stop12h 21m
Chicago O'Hare Intl
Thu 2/26
11:55 am-11:39 pm
1 stop10h 44m
$175
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Sat 4/18
6:00 am-3:25 pm
1 stop10h 25m
Chicago O'Hare Intl
Mon 4/20
6:57 am-4:52 pm
1 stop8h 55m
$181
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Wed 2/25
8:00 am-10:46 am
1 stop27h 46m
Chicago O'Hare Intl
Sat 2/28
8:15 am-6:01 pm
1 stop8h 46m
$185
TrentonSt. Louis
TTN - STL
TTNSTL
Trenton-Mercer
Mon 2/23
6:00 am-11:59 pm
1 stop18h 59m
Lambert-St Louis
Tue 2/24
3:49 pm-11:39 pm
1 stop6h 50m
$186
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Mon 2/23
6:45 am-10:51 am
2 stops29h 06m
Chicago O'Hare Intl
Wed 2/25
12:44 pm-11:39 pm
1 stop9h 55m
$190
TrentonChicago
TTN - ORD
TTNORD
Trenton-Mercer
Mon 2/23
11:54 am-11:15 pm
1 stop12h 21m
Chicago O'Hare Intl
Fri 2/27
2:13 pm-11:59 pm
1 stop8h 46m
$199
Showing 1-10 of 42 results
Best time to book a flight from Trenton to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Trenton with our price prediction graph.
TTN-ORD
TTN-STL
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 Trenton to Illinois
TTN-USIL
TTN-ORD
TTN-STL
What is the cheapest month to book a flight from Trenton, New Jersey to Illinois?
Currently, December is the cheapest month in which you can book a flight from Trenton, New Jersey to Illinois (average of $48). Flying from Trenton, New Jersey to Illinois in July is currently the most expensive (average of $119). 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.