$48+ Cheap flights from Chicago (CHI) 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — ORD
Sep 19 — Sep 261
Round-trip
1 adult, Economy
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Find cheap flights from Chicago 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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Cheapest flights from Chicago to IllinoisExplore the most affordable flight options available from Chicago to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
Explore the most affordable flight options available from Chicago to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
This Mytrip deal was found by Cheapflights users on 8/17. 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 9/165:50 pm -
Nonstop1h 25m
Wed 9/233:35 pm -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$91
This Mytrip deal was found by Cheapflights users on 8/16. 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.
Thu 9/35:50 pm -
Nonstop1h 25m
Sun 9/63:35 pm -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$98
This Mytrip deal was found by Cheapflights users on 8/16. 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.
Fri 12/116:00 pm -
Nonstop1h 25m
Sat 12/269:00 am -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$99
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/25:50 pm -
Nonstop1h 25m
Sun 9/69:00 am -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$100
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/212:20 pm -
Nonstop1h 25m
Tue 9/89:00 am -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$101
This Mytrip deal was found by Cheapflights users on 8/17. 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 9/95:50 pm -
Nonstop1h 25m
Wed 9/169:00 am -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$102
This Contour deal was found by Cheapflights users on 8/16. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:20 pm -
Nonstop1h 25m
Sun 9/139:00 am -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$118
This Booking.com deal was found by Cheapflights users on 8/15. 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 12/2312:20 pm -
Nonstop1h 25m
Tue 12/299:00 am -
Nonstop1h 35m
Deal found 8/15![Contour logo]()
$123
This Contour deal was found by Cheapflights users on 8/16. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:50 pm -
Nonstop1h 25m
Wed 10/79:00 am -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$129
This United Airlines deal was found by Cheapflights users on 8/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:45 pm -
Nonstop1h 14m
Sun 9/69:12 am -
Nonstop1h 17m
Deal found 8/19![United Airlines logo]()
$149
This Trip.com deal was found by Cheapflights users on 8/19. 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.
Sat 10/36:30 am -
1 stop12h 47m
Sat 10/107:42 pm -
1 stop28h 42m
Deal found 8/19![Frontier logo]()
$151
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:29 am -
1 stop4h 24m
Mon 10/126:47 am -
1 stop6h 00m
Deal found 8/19![Delta logo]()
$157
Best flights from Chicago to IllinoisDiscover carefully curated flight deals from Chicago to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
Discover carefully curated flight deals from Chicago to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
This Mytrip deal was found by Cheapflights users on 8/15. 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.
Fri 10/26:00 pm -
Nonstop1h 25m
Mon 10/53:45 pm -
Nonstop1h 35m
Deal found 8/15![Contour logo]()
$91
This United Airlines deal was found by Cheapflights users on 8/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:30 pm -
Nonstop1h 14m
Tue 9/227:20 pm -
Nonstop1h 17m
Deal found 8/16![United Airlines logo]()
$149
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/25:50 pm -
Nonstop1h 25m
Sun 9/69:00 am -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$100
This Southwest deal was found by Cheapflights users on 8/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:55 am -
1 stop4h 15m
Thu 9/245:40 pm -
1 stop4h 45m
Deal found 8/19![Southwest logo]()
$203
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/212:20 pm -
Nonstop1h 25m
Tue 9/89:00 am -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$101
This Mytrip deal was found by Cheapflights users on 8/17. 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 9/95:50 pm -
Nonstop1h 25m
Wed 9/169:00 am -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$102
This American Airlines deal was found by Cheapflights users on 8/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/123:12 pm -
Nonstop1h 15m
Sat 9/196:00 am -
Nonstop1h 19m
Deal found 8/15![American Airlines logo]()
$249
This Booking.com deal was found by Cheapflights users on 8/18. 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 9/312:20 pm -
Nonstop1h 25m
Sun 9/63:35 pm -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$108
This United Airlines deal was found by Cheapflights users on 8/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:45 pm -
Nonstop1h 14m
Sun 9/69:12 am -
Nonstop1h 17m
Deal found 8/19![United Airlines logo]()
$149
This Contour deal was found by Cheapflights users on 8/17. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:50 pm -
Nonstop1h 25m
Sat 9/59:00 am -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$118
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:27 am -
Nonstop1h 10m
Mon 9/79:12 am -
Nonstop1h 17m
Deal found 8/18![United Airlines logo]()
$159
This Contour deal was found by Cheapflights users on 8/19. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:20 pm -
Nonstop1h 25m
Mon 9/79:00 am -
Nonstop1h 35m
Deal found 8/19![Contour logo]()
$118
This United Airlines deal was found by Cheapflights users on 8/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:45 pm -
Nonstop1h 14m
Tue 10/207:18 pm -
Nonstop1h 17m
Deal found 8/19![United Airlines logo]()
$159
This Delta deal was found by Cheapflights users on 8/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:10 am -
1 stop4h 21m
Sat 10/36:15 am -
2 stops6h 43m
Deal found 8/16![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 8/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:55 am -
2 stops6h 05m
Mon 10/2610:25 am -
1 stop5h 40m
Deal found 8/19![Southwest logo]()
$208
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/912:20 pm -
Nonstop1h 25m
Sun 10/119:00 am -
Nonstop1h 35m
Deal found 8/19![Contour logo]()
$118
This United Airlines deal was found by Cheapflights users on 8/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/136:55 am -
Nonstop1h 10m
Sun 9/209:13 am -
Nonstop1h 17m
Deal found 8/16![United Airlines logo]()
$159
This Contour deal was found by Cheapflights users on 8/16. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/315:50 pm -
Nonstop1h 25m
Fri 9/49:00 am -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$118
This United Airlines deal was found by Cheapflights users on 8/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:45 pm -
Nonstop1h 14m
Tue 9/87:20 pm -
Nonstop1h 17m
Deal found 8/19![United Airlines logo]()
$159
This Southwest deal was found by Cheapflights users on 8/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:40 pm -
1 stop5h 15m
Sat 9/127:50 am -
2 stops5h 30m
Deal found 8/16![Southwest logo]()
$225
This American Airlines deal was found by Cheapflights users on 8/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:45 pm -
Nonstop1h 13m
Thu 10/85:30 pm -
Nonstop1h 24m
Deal found 8/17![American Airlines logo]()
$251
This Contour deal was found by Cheapflights users on 8/17. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:50 pm -
Nonstop1h 25m
Mon 9/219:00 am -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$118
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:45 pm -
Nonstop1h 14m
Sun 9/68:03 pm -
Nonstop1h 17m
Deal found 8/18![United Airlines logo]()
$159
This Contour deal was found by Cheapflights users on 8/14. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:20 pm -
Nonstop1h 25m
Sun 9/133:35 pm -
Nonstop1h 35m
Deal found 8/14![Contour logo]()
$118
This American Airlines deal was found by Cheapflights users on 8/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:00 pm -
Nonstop0h 59m
Sun 9/66:00 am -
Nonstop1h 16m
Deal found 8/15![American Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 8/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:50 am -
Nonstop1h 10m
Sun 9/2710:15 am -
1 stop6h 00m
Deal found 8/15![Southwest logo]()
$242
This United Airlines deal was found by Cheapflights users on 8/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:50 pm -
Nonstop1h 31m
Wed 9/308:00 am -
Nonstop1h 31m
Deal found 8/15![United Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 8/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:55 pm -
Nonstop1h 15m
Sun 9/208:50 am -
Nonstop1h 05m
Deal found 8/18![Southwest logo]()
$249
This Southwest deal was found by Cheapflights users on 8/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:15 pm -
Nonstop1h 20m
Mon 9/78:50 pm -
Nonstop1h 10m
Deal found 8/16![Southwest logo]()
$251
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1811:50 am -
Nonstop1h 30m
Tue 9/225:00 am -
Nonstop1h 28m
Deal found 8/18![United Airlines logo]()
$194
Last-minute flights from Chicago to IllinoisDiscover last-minute flight deals from Chicago to Illinois. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Illinois. Data last updated August 20, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:45 pm -
Nonstop1h 14m
Sat 8/297:20 pm -
Nonstop1h 17m
Deal found 8/15![United Airlines logo]()
$174
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/25:50 pm -
Nonstop1h 25m
Sun 9/69:00 am -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$100
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/212:20 pm -
Nonstop1h 25m
Tue 9/89:00 am -
Nonstop1h 35m
Deal found 8/18![Contour logo]()
$101
This Mytrip deal was found by Cheapflights users on 8/16. 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.
Thu 9/35:50 pm -
Nonstop1h 25m
Sun 9/63:35 pm -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$98
This United Airlines deal was found by Cheapflights users on 8/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:45 pm -
Nonstop1h 14m
Sun 9/69:12 am -
Nonstop1h 17m
Deal found 8/19![United Airlines logo]()
$149
This Mytrip deal was found by Cheapflights users on 8/17. 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 9/95:50 pm -
Nonstop1h 25m
Wed 9/169:00 am -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$102
This Contour deal was found by Cheapflights users on 8/16. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:20 pm -
Nonstop1h 25m
Sun 9/139:00 am -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$118
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:13 pm -
1 stop4h 03m
Tue 9/156:15 am -
1 stop7h 05m
Deal found 8/19![Delta logo]()
$164
This Mytrip deal was found by Cheapflights users on 8/17. 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 9/165:50 pm -
Nonstop1h 25m
Wed 9/233:35 pm -
Nonstop1h 35m
Deal found 8/17![Contour logo]()
$91
This Delta deal was found by Cheapflights users on 8/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:55 pm -
1 stop6h 40m
Thu 9/241:55 pm -
1 stop6h 35m
Deal found 8/19![Delta logo]()
$164
This Contour deal was found by Cheapflights users on 8/14. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2812:20 pm -
Nonstop1h 25m
Mon 10/53:45 pm -
Nonstop1h 35m
Deal found 8/14![Contour logo]()
$130
This Contour deal was found by Cheapflights users on 8/16. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:20 pm -
Nonstop1h 25m
Wed 10/73:45 pm -
Nonstop1h 35m
Deal found 8/16![Contour logo]()
$129
One-way flights from Chicago to IllinoisSearch for one-way flight options from Chicago to Illinois. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
Search for one-way flight options from Chicago to Illinois. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
This Booking.com deal was found by Cheapflights users on 8/18. 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.
Fri 9/45:50 pm -
Nonstop1h 25m
Deal found 8/18![Contour logo]()
$48
This Booking.com deal was found by Cheapflights users on 8/16. 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 12/2212:20 pm -
Nonstop1h 25m
Deal found 8/16![Contour logo]()
$58
This Southwest deal was found by Cheapflights users on 8/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:55 pm -
Nonstop1h 15m
Deal found 8/19![Southwest logo]()
$59
This American Airlines deal was found by Cheapflights users on 8/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:55 am -
Nonstop1h 23m
Deal found 8/19![American Airlines logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Sat 9/195:50 pm -
Nonstop1h 25m
Deal found 8/18![Contour logo]()
$60
This Frontier deal was found by Cheapflights users on 8/19. 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 10/216:15 am -
1 stop11h 25m
Deal found 8/19![Frontier logo]()
$65
This Contour deal was found by Cheapflights users on 8/14. 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 Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:50 pm -
Nonstop1h 25m
Deal found 8/14![Contour logo]()
$65
This Frontier deal was found by Cheapflights users on 8/18. 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 9/148:55 pm -
1 stop14h 37m
Deal found 8/18![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Wed 11/182:03 pm -
1 stop19h 37m
Deal found 8/17![Frontier logo]()
$66
This Southwest deal was found by Cheapflights users on 8/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:55 am -
1 stop4h 15m
Deal found 8/17![Southwest logo]()
$69
This CheapOair deal was found by Cheapflights users on 8/17. 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 9/151:21 pm -
1 stop22h 11m
Deal found 8/17![Frontier logo]()
$70
This Frontier deal was found by Cheapflights users on 8/18. 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 9/186:25 am -
1 stop6h 45m
Deal found 8/18![Frontier logo]()
$71
Find flight deals from Chicago to Illinois
Keep the following information in mind while searching for Chicago to Illinois flight deals. Data was last updated August 20, 2026.
Round-trip from | $91 (Mytrip) |
|---|---|
One-way from | $48 (Booking.com) |
Good round-trip deal | $228 or less |
Good one-way deal | $80 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago 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 7,457,451 searches. Data last updated August 20, 2026.
Use the filters below to find and compare flights from Chicago to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Fri 10/2
6:00 pm-7:25 pm
Nonstop1h 25m
Burlington
Mon 10/5
3:45 pm-5:20 pm
Nonstop1h 35m
$91
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Wed 9/2
5:50 pm-7:15 pm
Nonstop1h 25m
Burlington
Sun 9/6
9:00 am-10:35 am
Nonstop1h 35m
$100
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Wed 9/2
12:20 pm-1:45 pm
Nonstop1h 25m
Burlington
Tue 9/8
9:00 am-10:35 am
Nonstop1h 35m
$101
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Wed 9/9
5:50 pm-7:15 pm
Nonstop1h 25m
Burlington
Wed 9/16
9:00 am-10:35 am
Nonstop1h 35m
$102
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Thu 9/3
12:20 pm-1:45 pm
Nonstop1h 25m
Burlington
Sun 9/6
3:35 pm-5:10 pm
Nonstop1h 35m
$108
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Tue 9/1
5:50 pm-7:15 pm
Nonstop1h 25m
Burlington
Sat 9/5
9:00 am-10:35 am
Nonstop1h 35m
$118
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Thu 9/3
12:20 pm-1:45 pm
Nonstop1h 25m
Burlington
Mon 9/7
9:00 am-10:35 am
Nonstop1h 35m
$118
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Fri 10/9
12:20 pm-1:45 pm
Nonstop1h 25m
Burlington
Sun 10/11
9:00 am-10:35 am
Nonstop1h 35m
$118
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Mon 8/31
5:50 pm-7:15 pm
Nonstop1h 25m
Burlington
Fri 9/4
9:00 am-10:35 am
Nonstop1h 35m
$118
ChicagoBurlington
ORD Chicago O'Hare Intl - BRL Burlington
ORDBRL
Chicago O'Hare Intl
Thu 9/17
5:50 pm-7:15 pm
Nonstop1h 25m
Burlington
Mon 9/21
9:00 am-10:35 am
Nonstop1h 35m
$118
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Chicago to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Chicago with our price prediction graph.
ORD-BRL
ORD-DEC
MDW-STL
ORD-STL
ORD-SPI
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 Chicago to Illinois
CHI-USIL
ORD-BRL
ORD-DEC
MDW-STL
ORD-STL
What is the cheapest month to book a flight from Chicago to Illinois?
Currently, April is the cheapest month in which you can book a flight from Chicago to Illinois (average of $179). Flying from Chicago to Illinois in December is currently the most expensive (average of $979). 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 CHI to IL?
Find hourly flight availability from Chicago to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2026.
A simple way to save on the total cost of your ticket is to fly from Chicago to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from Chicago to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Chicago to Illinois. Price data was last updated on November 29, 2025.
Travelers seeking maximum savings on their Chicago to Illinois flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated August 20, 2026.
Read reviews from past customers who have flown Contour and United Airlines from Chicago to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
7.8
Boarding
7.5
Food
6.8
Comfort
7.3
Overall
7.5
Entertainment
6.1
Reviews
1 / 2
10.0
ExcellentAnonymous,Oct 2025
CLT - PAH
Crew
7.8
Boarding
7.5
Food
6.8
Comfort
7.3
Overall
7.5
Entertainment
6.1
Reviews
1 / 2
10.0
ExcellentAnonymous,Oct 2025
CLT - PAH
Crew
7.8
Boarding
7.5
Food
6.8
Comfort
7.3
Overall
7.5
Entertainment
6.1
Reviews
1 / 2
10.0
ExcellentAnonymous,Oct 2025
CLT - PAH
Related info for your journey
Find useful and relevant information for your journey from Chicago to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Chicago to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Chicago to Illinois by cabin class
Find flights from Chicago to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Chicago and Illinois flights
Browse other Chicago and Illinois flight options. Last updated on August 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Chicago to Illinois flights
Consider these flights traveling from Chicago to Illinois.
Top 2 airlines flying from Chicago to Illinois
Discover the top 2 airlines that operate flights from Chicago to Illinois. 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 7,457,451 searches. Data last updated August 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$168 | Average$682 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$179 | Average$279 | FlexibilityNo cancel fee | On-time69% |