$105+ Cheap flights from Pittsburgh (PIT) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ORD
Oct 13 — Oct 201
Round-trip
1 adult, Economy
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Find cheap flights from Pittsburgh 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 Pittsburgh to IllinoisExplore the most affordable flight options available from Pittsburgh to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
Explore the most affordable flight options available from Pittsburgh to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2026.
This Frontier deal was found by Cheapflights users on 9/10. 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 10/32:32 pm -
1 stop27h 02m
Mon 10/55:19 pm -
1 stop19h 28m
Deal found 9/10![Frontier logo]()
$190
This Frontier deal was found by Cheapflights users on 9/9. 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 10/137:51 pm -
1 stop13h 00m
Tue 10/208:46 am -
1 stop9h 10m
Deal found 9/9![Frontier logo]()
$210
This CheapOair deal was found by Cheapflights users on 9/8. 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 9/292:42 pm -
1 stop9h 17m
Fri 10/23:50 pm -
1 stop20h 57m
Deal found 9/8![Frontier logo]()
$221
This Frontier deal was found by Cheapflights users on 9/10. 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 10/108:18 pm -
1 stop12h 13m
Sat 10/178:46 am -
1 stop9h 37m
Deal found 9/10![Frontier logo]()
$225
This Frontier deal was found by Cheapflights users on 9/8. 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 10/108:18 pm -
1 stop12h 13m
Thu 10/158:26 am -
1 stop9h 30m
Deal found 9/8![Frontier logo]()
$226
This Southwest deal was found by Cheapflights users on 9/9. 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.
Wed 10/146:50 am -
Nonstop1h 55m
Wed 10/1410:20 am -
Nonstop1h 35m
Deal found 9/9![Southwest logo]()
$227
This CheapOair deal was found by Cheapflights users on 9/8. 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 9/222:42 pm -
1 stop9h 17m
Wed 9/233:50 pm -
1 stop20h 57m
Deal found 9/8![Frontier logo]()
$230
This Frontier deal was found by Cheapflights users on 9/8. 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 10/137:51 pm -
1 stop13h 00m
Thu 10/158:26 am -
1 stop9h 30m
Deal found 9/8![Frontier logo]()
$234
This CheapOair deal was found by Cheapflights users on 9/10. 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 9/292:42 pm -
1 stop9h 17m
Tue 10/63:50 pm -
1 stop20h 57m
Deal found 9/10![Frontier logo]()
$235
This CheapOair deal was found by Cheapflights users on 9/9. 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 10/108:18 pm -
1 stop12h 13m
Mon 10/198:11 pm -
1 stop21h 45m
Deal found 9/9![Frontier logo]()
$236
This Frontier deal was found by Cheapflights users on 9/8. 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.
Thu 10/87:51 pm -
1 stop12h 40m
Thu 10/158:26 am -
1 stop9h 30m
Deal found 9/8![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 9/10. 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.
Thu 10/12:32 pm -
1 stop9h 27m
Mon 10/53:50 pm -
1 stop20h 57m
Deal found 9/10![Frontier logo]()
$244
Best flights from Pittsburgh to IllinoisDiscover carefully curated flight deals from Pittsburgh to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
Discover carefully curated flight deals from Pittsburgh to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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.
Tue 9/297:20 pm -
Nonstop1h 40m
Wed 9/3010:25 am -
Nonstop1h 40m
Deal found 9/8![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 9/8. 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 11/172:07 pm -
Nonstop1h 48m
Wed 11/186:10 pm -
Nonstop1h 39m
Deal found 9/8![United Airlines logo]()
$303
This JetBlue deal was found by Cheapflights users on 9/8. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 am -
1 stop7h 45m
Thu 10/13:00 pm -
1 stop7h 20m
Deal found 9/8![JetBlue logo]()
$311
This Delta deal was found by Cheapflights users on 9/10. 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 10/86:30 am -
1 stop6h 17m
Tue 10/136:44 pm -
1 stop4h 15m
Deal found 9/10![Delta logo]()
$323
This American Airlines deal was found by Cheapflights users on 9/10. 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 11/78:02 am -
2 stops9h 21m
Thu 11/125:03 pm -
1 stop5h 16m
Deal found 9/10![American Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/299:00 am -
1 stop4h 22m
Mon 11/25:55 pm -
1 stop18h 06m
Deal found 9/8![Multiple Airlines logo]()
$343
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
Thu 11/1212:10 pm -
1 stop21h 28m
Sun 11/151:08 pm -
1 stop6h 59m
Deal found 9/12![Allegiant Air logo]()
$426
This Southwest deal was found by Cheapflights users on 9/10. 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.
Wed 10/216:50 am -
Nonstop1h 55m
Thu 10/227:55 pm -
Nonstop1h 40m
Deal found 9/10![Southwest logo]()
$227
This Southwest deal was found by Cheapflights users on 9/8. 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.
Wed 10/146:50 am -
Nonstop1h 55m
Wed 10/1410:55 am -
1 stop3h 25m
Deal found 9/8![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 9/12. 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 10/106:20 am -
1 stop3h 55m
Sat 10/1710:30 am -
Nonstop1h 35m
Deal found 9/12![Southwest logo]()
$237
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/610:56 am -
Nonstop1h 44m
Tue 10/69:20 pm -
Nonstop1h 39m
Deal found 9/9![United Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 12/511:25 am -
1 stop6h 39m
Mon 12/76:00 am -
1 stop5h 15m
Deal found 9/10![Delta logo]()
$323
This Southwest deal was found by Cheapflights users on 9/10. 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.
Sun 11/16:50 am -
Nonstop2h 00m
Tue 11/36:15 pm -
Nonstop1h 35m
Deal found 9/10![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 9/8. 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 2/1310:50 am -
Nonstop1h 46m
Tue 2/163:50 pm -
Nonstop1h 34m
Deal found 9/8![United Airlines logo]()
$303
This American Airlines deal was found by Cheapflights users on 9/12. 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 11/121:05 pm -
1 stop4h 23m
Sat 11/146:00 am -
1 stop5h 28m
Deal found 9/12![American Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 11/126:27 pm -
1 stop15h 11m
Sun 11/1510:30 am -
1 stop30h 52m
Deal found 9/10![Multiple Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 9/10. 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.
Fri 11/65:59 pm -
1 stop5h 31m
Sun 11/85:09 pm -
1 stop6h 37m
Deal found 9/10![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 9/11. 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 11/166:30 pm -
Nonstop1h 55m
Mon 11/2310:15 am -
Nonstop1h 35m
Deal found 9/11![Southwest logo]()
$256
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 10/194:10 pm -
Nonstop1h 49m
Fri 10/235:59 am -
Nonstop1h 39m
Deal found 9/9![United Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 9/12. 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 10/86:50 am -
Nonstop1h 55m
Sun 10/115:55 am -
1 stop4h 00m
Deal found 9/12![Southwest logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 9/12. 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.
Fri 11/135:26 pm -
1 stop19h 28m
Sun 11/151:08 pm -
1 stop6h 59m
Deal found 9/12![Allegiant Air logo]()
$432
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 9/232:42 pm -
2 stops25h 21m
Sun 9/273:53 pm -
1 stop6h 00m
Deal found 9/11![Multiple Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 9/10. 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 10/296:00 am -
1 stop5h 29m
Sun 11/85:29 pm -
1 stop5h 30m
Deal found 9/10![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 9/11. 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 9/198:47 pm -
1 stop4h 18m
Sun 9/204:57 pm -
1 stop5h 33m
Deal found 9/11![American Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 9/10. 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 11/126:01 pm -
Nonstop1h 48m
Sun 11/153:45 pm -
Nonstop1h 34m
Deal found 9/10![United Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/106:17 pm -
1 stop16h 23m
Wed 10/1411:04 am -
1 stop21h 37m
Deal found 9/8![Multiple Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/19:00 am -
1 stop6h 26m
Sun 10/45:47 pm -
1 stop20h 55m
Deal found 9/10![Allegiant Air logo]()
$441
This Delta deal was found by Cheapflights users on 9/8. 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 9/235:40 pm -
1 stop5h 50m
Sun 9/276:00 am -
1 stop5h 31m
Deal found 9/8![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 11/65:00 pm -
2 stops8h 07m
Sun 11/86:00 am -
1 stop5h 28m
Deal found 9/10![American Airlines logo]()
$410
This Southwest deal was found by Cheapflights users on 9/10. 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 10/38:40 am -
2 stops8h 10m
Mon 10/56:45 am -
1 stop4h 00m
Deal found 9/10![Southwest logo]()
$292
Last-minute flights from Pittsburgh to IllinoisDiscover last-minute flight deals from Pittsburgh to Illinois. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Pittsburgh to Illinois. Data last updated September 13, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 9/8. 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 9/222:42 pm -
1 stop9h 17m
Wed 9/233:50 pm -
1 stop20h 57m
Deal found 9/8![Frontier logo]()
$230
This CheapOair deal was found by Cheapflights users on 9/8. 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 9/292:42 pm -
1 stop9h 17m
Fri 10/23:50 pm -
1 stop20h 57m
Deal found 9/8![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 9/10. 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 9/292:42 pm -
1 stop9h 17m
Tue 10/63:50 pm -
1 stop20h 57m
Deal found 9/10![Frontier logo]()
$235
This Frontier deal was found by Cheapflights users on 9/10. 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.
Thu 10/12:32 pm -
1 stop9h 27m
Mon 10/53:50 pm -
1 stop20h 57m
Deal found 9/10![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 9/10. 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 10/32:32 pm -
1 stop27h 02m
Mon 10/55:19 pm -
1 stop19h 28m
Deal found 9/10![Frontier logo]()
$190
This Frontier deal was found by Cheapflights users on 9/8. 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.
Thu 10/87:51 pm -
1 stop12h 40m
Thu 10/158:26 am -
1 stop9h 30m
Deal found 9/8![Frontier logo]()
$242
This Frontier deal was found by Cheapflights users on 9/10. 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 10/108:18 pm -
1 stop12h 13m
Sat 10/178:46 am -
1 stop9h 37m
Deal found 9/10![Frontier logo]()
$225
This Frontier deal was found by Cheapflights users on 9/8. 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 10/108:18 pm -
1 stop12h 13m
Thu 10/158:26 am -
1 stop9h 30m
Deal found 9/8![Frontier logo]()
$226
This CheapOair deal was found by Cheapflights users on 9/9. 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 10/108:18 pm -
1 stop12h 13m
Mon 10/198:11 pm -
1 stop21h 45m
Deal found 9/9![Frontier logo]()
$236
This Frontier deal was found by Cheapflights users on 9/9. 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 10/137:51 pm -
1 stop13h 00m
Tue 10/208:46 am -
1 stop9h 10m
Deal found 9/9![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 9/8. 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 10/137:51 pm -
1 stop13h 00m
Thu 10/158:26 am -
1 stop9h 30m
Deal found 9/8![Frontier logo]()
$234
This Southwest deal was found by Cheapflights users on 9/9. 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.
Wed 10/146:50 am -
Nonstop1h 55m
Wed 10/1410:20 am -
Nonstop1h 35m
Deal found 9/9![Southwest logo]()
$227
One-way flights from Pittsburgh to IllinoisSearch for one-way flight options from Pittsburgh to Illinois. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
Search for one-way flight options from Pittsburgh to Illinois. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Frontier deal was found by Cheapflights users on 9/10. 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 10/62:42 pm -
1 stop9h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$105
This CheapOair deal was found by Cheapflights users on 9/11. 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 10/108:18 pm -
1 stop27h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Frontier logo]()
$105
This Priceline deal was found by Cheapflights users on 9/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:42 pm -
1 stop9h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$110
This Frontier deal was found by Cheapflights users on 9/10. 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 10/108:18 pm -
1 stop12h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$111
This Southwest deal was found by Cheapflights users on 9/10. 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 11/96:50 am -
Nonstop2h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Southwest logo]()
$114
This CheapOair deal was found by Cheapflights users on 9/10. 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 10/178:18 pm -
1 stop27h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$116
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:59 pm -
1 stop6h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/58:54 pm -
3 stops41h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$120
This Frontier deal was found by Cheapflights users on 9/9. 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 12/710:30 am -
1 stop9h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$121
This Frontier deal was found by Cheapflights users on 9/9. 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 10/52:32 pm -
1 stop9h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$121
This Southwest deal was found by Cheapflights users on 9/11. 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.
Tue 11/108:25 am -
1 stop5h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Southwest logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 11/126:30 am -
2 stops36h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$125
Find flight deals from Pittsburgh to Illinois
Keep the following information in mind while searching for Pittsburgh to Illinois flight deals. Data was last updated September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $190 (Frontier) |
One-way from | $105 (Frontier) |
Popular in | December |
Cheapest in | October |
Average price | $308 |
Good round-trip deal | $313 or less |
Good one-way deal | $178 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Pittsburgh 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 September 13, 2026.
Use the filters below to find and compare flights from Pittsburgh to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Mon 11/2
8:15 pm-9:00 pm
Nonstop1h 45m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$114
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Tue 12/8
6:30 pm-7:25 pm
Nonstop1h 55m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$114
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Sat 10/10
12:20 pm-1:00 pm
Nonstop1h 40m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$114
PittsburghChicago
PIT Pittsburgh - ORD Chicago O'Hare Intl
PITORD
Pittsburgh
Tue 10/13
7:51 pm-7:51 am
1 stop13h 00m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$121
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Thu 11/12
6:00 am-11:15 am
1 stop6h 15m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Mon 11/9
6:01 pm-11:24 pm
1 stop6h 23m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Tue 10/6
12:20 pm-5:19 pm
1 stop5h 59m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Mon 12/7
5:09 pm-9:38 pm
1 stop5h 29m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Mon 11/9
5:00 am-10:00 am
1 stop6h 00m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
PittsburghSt. Louis
PIT Pittsburgh - STL Lambert-St Louis
PITSTL
Pittsburgh
Sat 11/14
6:00 am-9:45 am
1 stop4h 45m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$124
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Pittsburgh to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Pittsburgh with our price prediction graph.
PIT-ORD
PIT-STL
PIT-MDW
PIT-MLI
PIT-RFD
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 Pittsburgh to Illinois
PIT-USIL
PIT-ORD
PIT-STL
PIT-MDW
PIT-MLI
What is the cheapest month to book a flight from Pittsburgh to Illinois?
Currently, October is the cheapest month in which you can book a flight from Pittsburgh to Illinois (average of $298). Flying from Pittsburgh to Illinois in July is currently the most expensive (average of $410). 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 PIT to IL?
Find hourly flight availability from Pittsburgh 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 September 13, 2026.
It’s optimal to fly from Pittsburgh to Illinois in the evening. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the afternoon.
Weekly flight availability from Pittsburgh to Illinois
Explore weekly flight availability from Pittsburgh to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 13, 2026.
The most flights from PIT to USIL are scheduled on a Friday (60 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (37 on average).
How much does it cost to fly round-trip from Pittsburgh to Illinois?
Airfare is typical for this route at the moment.
Pittsburgh to Illinois flights typically cost between $207 and $495 in October.The cheapest round-trip price found within the last 5 days was $210 on Frontier (Oct 13-Oct 20).
How far ahead should I book a flight from Pittsburgh to Illinois?
To ensure you get the cheapest price possible for a flight from Pittsburgh to Illinois, you should look to book at least 88 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest day to fly from Pittsburgh to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Pittsburgh to Illinois. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Pittsburgh to Illinois flight should consider departing on Saturday at noon when fares are most often at their lowest. Monday mornings 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 September 13, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican Airlines from Pittsburgh to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Pittsburgh 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 Pittsburgh to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Pittsburgh to Illinois by cabin class
Find flights from Pittsburgh to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Pittsburgh and Illinois flights
Browse other Pittsburgh and Illinois flight options. Last updated on September 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Pittsburgh to Illinois flights
Consider these flights traveling from Pittsburgh to Illinois.
Top 3 airlines flying from Pittsburgh to Illinois
Discover the top 3 airlines that operate flights from Pittsburgh 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 September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$355 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$137 | Average$420 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$175 | Average$434 | FlexibilityNo cancel fee | On-time69% |