$54+ Cheap flights from Knoxville (TYS) 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Dec 12 — Dec 191
Round-trip
1 adult, Economy
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Find cheap flights from Knoxville to Illinois with Cheapflights
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Cheapest flights from Knoxville to IllinoisExplore the most affordable flight options available from Knoxville to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 12, 2026.
Explore the most affordable flight options available from Knoxville to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/41:58 pm -
2 stops25h 32m
Tue 1/194:47 pm -
1 stop16h 53m
Deal found 11/10![Multiple Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/38:55 pm -
1 stop18h 05m
Mon 12/76:07 am -
1 stop30h 00m
Deal found 11/10![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/25:09 pm -
1 stop21h 51m
Mon 12/76:07 am -
1 stop30h 00m
Deal found 11/11![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Wed 12/25:09 pm -
1 stop21h 51m
Sun 12/66:07 am -
1 stop25h 20m
Deal found 11/10![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/49:49 pm -
2 stops17h 41m
Mon 1/184:47 pm -
1 stop18h 23m
Deal found 11/10![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/71:58 pm -
1 stop7h 26m
Mon 1/184:47 pm -
1 stop18h 23m
Deal found 11/9![Multiple Airlines logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 11/1410:55 am -
2 stops13h 52m
Mon 11/164:31 pm -
Nonstop1h 30m
Deal found 11/7![Multiple Airlines logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/238:00 am -
Nonstop1h 39m
Sat 12/512:28 pm -
3 stops31h 03m
Deal found 11/9![Multiple Airlines logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Fri 12/41:58 pm -
1 stop7h 26m
Mon 12/76:07 am -
1 stop30h 00m
Deal found 11/11![Multiple Airlines logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 11/201:01 pm -
Nonstop1h 39m
Mon 11/238:42 pm -
1 stop25h 41m
Deal found 11/7![Multiple Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 11/8. 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 12/92:40 pm -
1 stop6h 15m
Mon 1/186:50 am -
1 stop4h 05m
Deal found 11/8![Southwest logo]()
$312
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 11/131:17 pm -
2 stops29h 30m
Mon 11/164:31 pm -
Nonstop1h 30m
Deal found 11/7![Multiple Airlines logo]()
$316
Best flights from Knoxville to IllinoisDiscover carefully curated flight deals from Knoxville to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 12, 2026.
Discover carefully curated flight deals from Knoxville to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 12, 2026.
This Southwest deal was found by Cheapflights users on 11/9. 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 12/91:00 pm -
1 stop6h 05m
Sun 1/177:45 am -
1 stop3h 30m
Deal found 11/9![Southwest logo]()
$323
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Wed 12/235:57 pm -
Nonstop2h 06m
Fri 12/255:52 pm -
Nonstop1h 59m
Deal found 11/10![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 11/10. 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 12/412:32 pm -
1 stop4h 44m
Sun 12/66:00 am -
1 stop4h 27m
Deal found 11/10![Delta logo]()
$349
This American Airlines deal was found by Cheapflights users on 11/10. 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.
Thu 12/107:44 am -
1 stop7h 04m
Wed 12/165:44 am -
1 stop4h 18m
Deal found 11/10![American Airlines logo]()
$417
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Wed 11/2510:03 pm -
1 stop12h 39m
Sun 11/299:02 am -
1 stop13h 26m
Deal found 11/10![Allegiant Air logo]()
$485
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Fri 12/46:00 am -
Nonstop2h 06m
Mon 12/77:18 am -
Nonstop1h 56m
Deal found 11/8![United Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 11/9. 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.
Thu 12/175:25 pm -
1 stop7h 30m
Mon 12/2112:50 pm -
2 stops7h 55m
Deal found 11/9![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:17 pm -
1 stop5h 37m
Fri 12/186:00 am -
1 stop4h 27m
Deal found 11/11![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 11/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:00 am -
Nonstop2h 06m
Sun 12/132:10 pm -
Nonstop1h 50m
Deal found 11/11![United Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 11/9. 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.
Thu 12/105:15 pm -
1 stop6h 30m
Thu 12/1712:50 pm -
2 stops7h 55m
Deal found 11/9![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/102:36 pm -
1 stop5h 33m
Thu 12/175:30 am -
1 stop4h 57m
Deal found 11/9![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 11/11. 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.
Sat 12/197:45 pm -
1 stop5h 40m
Mon 12/2112:50 pm -
2 stops7h 55m
Deal found 11/11![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 11/8. 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.
Fri 12/42:36 pm -
1 stop7h 17m
Sun 12/62:41 pm -
1 stop5h 52m
Deal found 11/8![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/246:45 am -
Nonstop2h 09m
Sat 11/286:55 am -
Nonstop1h 58m
Deal found 11/9![United Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 11/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/66:13 am -
2 stops8h 35m
Sun 12/135:44 am -
1 stop4h 07m
Deal found 11/8![American Airlines logo]()
$442
This Southwest deal was found by Cheapflights users on 11/8. 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.
Fri 12/45:15 pm -
1 stop6h 30m
Mon 12/71:15 pm -
2 stops6h 35m
Deal found 11/8![Southwest logo]()
$342
This Delta deal was found by Cheapflights users on 11/7. 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.
Tue 11/245:40 am -
1 stop4h 42m
Mon 11/309:51 am -
1 stop4h 24m
Deal found 11/7![Delta logo]()
$364
This Southwest deal was found by Cheapflights users on 11/7. 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 12/45:15 pm -
1 stop6h 30m
Sun 12/67:20 am -
1 stop6h 40m
Deal found 11/7![Southwest logo]()
$348
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/237:10 am -
1 stop4h 29m
Sat 12/51:34 pm -
1 stop5h 40m
Deal found 11/9![Delta logo]()
$364
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Sat 1/2310:45 am -
1 stop4h 08m
Sun 1/246:27 am -
1 stop5h 53m
Deal found 11/10![United Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 11/11. 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.
Thu 12/105:15 pm -
1 stop6h 30m
Sun 12/137:20 am -
1 stop6h 40m
Deal found 11/11![Southwest logo]()
$348
This Delta deal was found by Cheapflights users on 11/7. 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.
Tue 11/248:35 am -
1 stop7h 14m
Sun 11/298:04 am -
1 stop4h 51m
Deal found 11/7![Delta logo]()
$364
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Wed 12/96:00 am -
1 stop5h 10m
Sun 12/132:36 pm -
1 stop5h 11m
Deal found 11/8![United Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 11/11. 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.
Fri 12/42:40 pm -
1 stop6h 15m
Mon 1/183:40 pm -
1 stop5h 40m
Deal found 11/11![Southwest logo]()
$348
This American Airlines deal was found by Cheapflights users on 11/10. 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.
Wed 12/27:44 am -
1 stop4h 12m
Fri 12/46:44 am -
1 stop5h 29m
Deal found 11/10![American Airlines logo]()
$577
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:10 pm -
1 stop6h 44m
Sat 11/286:15 pm -
1 stop4h 42m
Deal found 11/9![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 11/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/510:45 am -
Nonstop2h 01m
Tue 2/91:55 pm -
Nonstop1h 59m
Deal found 11/11![United Airlines logo]()
$419
This American Airlines deal was found by Cheapflights users on 11/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/247:39 am -
1 stop11h 51m
Sat 11/287:01 pm -
1 stop3h 49m
Deal found 11/9![American Airlines logo]()
$650
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Wed 12/21:55 pm -
1 stop5h 19m
Sat 12/53:45 pm -
1 stop4h 02m
Deal found 11/10![United Airlines logo]()
$449
This United Airlines deal was found by Cheapflights users on 11/7. 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 4/77:00 am -
1 stop4h 14m
Sat 4/102:26 pm -
1 stop5h 39m
Deal found 11/7![United Airlines logo]()
$449
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated November 12, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated November 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 11/131:17 pm -
2 stops29h 30m
Mon 11/164:31 pm -
Nonstop1h 30m
Deal found 11/7![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 11/1410:55 am -
2 stops13h 52m
Mon 11/164:31 pm -
Nonstop1h 30m
Deal found 11/7![Multiple Airlines logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 11/201:01 pm -
Nonstop1h 39m
Mon 11/238:42 pm -
1 stop25h 41m
Deal found 11/7![Multiple Airlines logo]()
$311
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/238:00 am -
Nonstop1h 39m
Sat 12/512:28 pm -
3 stops31h 03m
Deal found 11/9![Multiple Airlines logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/25:09 pm -
1 stop21h 51m
Mon 12/76:07 am -
1 stop30h 00m
Deal found 11/11![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Wed 12/25:09 pm -
1 stop21h 51m
Sun 12/66:07 am -
1 stop25h 20m
Deal found 11/10![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/38:55 pm -
1 stop18h 05m
Mon 12/76:07 am -
1 stop30h 00m
Deal found 11/10![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/41:58 pm -
2 stops25h 32m
Tue 1/194:47 pm -
1 stop16h 53m
Deal found 11/10![Multiple Airlines logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/49:49 pm -
2 stops17h 41m
Mon 1/184:47 pm -
1 stop18h 23m
Deal found 11/10![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 11/11. 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.
Fri 12/41:58 pm -
1 stop7h 26m
Mon 12/76:07 am -
1 stop30h 00m
Deal found 11/11![Multiple Airlines logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/71:58 pm -
1 stop7h 26m
Mon 1/184:47 pm -
1 stop18h 23m
Deal found 11/9![Multiple Airlines logo]()
$295
This Southwest deal was found by Cheapflights users on 11/8. 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 12/92:40 pm -
1 stop6h 15m
Mon 1/186:50 am -
1 stop4h 05m
Deal found 11/8![Southwest logo]()
$312
One-way flights from Knoxville to IllinoisSearch for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.
This Super.com deal was found by Cheapflights users on 11/7. 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.
Fri 11/201:01 pm -
Nonstop1h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Allegiant Air logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 11/7. 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 12/71:58 pm -
2 stops25h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Multiple Airlines logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/71:58 pm -
2 stops46h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Multiple Airlines logo]()
$153
This Southwest deal was found by Cheapflights users on 11/10. 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 12/122:50 pm -
1 stop5h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Southwest logo]()
$154
This Southwest deal was found by Cheapflights users on 11/9. 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.
Mon 12/75:15 pm -
1 stop6h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Southwest logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/41:58 pm -
2 stops25h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/119:49 pm -
2 stops14h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$172
This Southwest deal was found by Cheapflights users on 11/10. 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.
Fri 12/115:25 pm -
1 stop7h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Southwest logo]()
$175
This CheapOair deal was found by Cheapflights users on 11/7. 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.
Sun 11/291:58 pm -
Nonstop1h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Allegiant Air logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/1011:00 am -
2 stops28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$181
This Southwest deal was found by Cheapflights users on 11/10. 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.
Thu 12/35:15 pm -
1 stop6h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Southwest logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 11/10. 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.
Fri 11/209:13 pm -
1 stop27h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$193
Find flight deals from Knoxville to Illinois
Keep the following information in mind while searching for Knoxville to Illinois flight deals. Data was last updated November 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $246 (Kiwi.com) |
One-way from | $54 (Super.com) |
Popular in | September |
Cheapest in | January |
Average price | $359 |
Good round-trip deal | $85 or less |
Good one-way deal | $70 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Knoxville 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 November 12, 2026.
Use the filters below to find and compare flights from Knoxville to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Fri 11/20
1:01 pm-1:40 pm
Nonstop1h 39m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$63
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Sat 12/12
2:50 pm-7:35 pm
1 stop5h 45m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$154
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Mon 12/7
5:15 pm-10:45 pm
1 stop6h 30m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$164
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Fri 12/4
2:40 pm-10:45 pm
2 stops9h 05m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$194
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Fri 11/20
7:25 pm-12:10 am
1 stop5h 45m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$220
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Sat 12/12
6:00 am-7:06 am
Nonstop2h 06m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$229
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Mon 12/7
7:44 am-9:10 am
Nonstop2h 26m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$229
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Sat 3/13
5:45 pm-6:46 pm
Nonstop2h 01m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$229
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Mon 12/14
7:44 am-9:10 am
Nonstop2h 26m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$229
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Mon 12/7
5:35 pm-6:36 pm
Nonstop2h 01m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$229
Showing 1-10 of 52 resultsSorted by cheapest first
Best time to book a flight from Knoxville to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Knoxville with our price prediction graph.
TYS-MDW
TYS-ORD
TYS-BMI
TYS-PIA
TYS-MLI
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 Knoxville to Illinois
TYS-USIL
TYS-MDW
TYS-ORD
TYS-BMI
TYS-PIA
What is the cheapest month to book a flight from Knoxville to Illinois?
Currently, January is the cheapest month in which you can book a flight from Knoxville to Illinois (average of $267). Flying from Knoxville to Illinois in September is currently the most expensive (average of $390). 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 TYS to IL?
Find hourly flight availability from Knoxville 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 November 12, 2026.
It’s typically best to fly out from Knoxville to Illinois in the evening. Doing so could potentially save you 56% on the flight price compared to flying at noon, which is usually more expensive.
Weekly flight availability from Knoxville to Illinois
Explore weekly flight availability from Knoxville 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 November 12, 2026.
The most flights from TYS to USIL are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).
How much does it cost to fly round-trip from Knoxville to Illinois?
Airfare is below average for this route at the moment.
Knoxville to Illinois flights typically cost between $307 and $415 in December.The cheapest round-trip price found within the last 5 days was $246 on Multiple Airlines (Dec 2-Dec 7).
How far ahead should I book a flight from Knoxville to Illinois?
To ensure you get the cheapest price possible for a flight from Knoxville to Illinois, you should look to book at least 45 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 Knoxville to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Knoxville to Illinois. Price data was last updated on November 2, 2025.
Travelers seeking maximum savings on their Knoxville to Illinois flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday 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 November 12, 2026.
Read through reviews of airlines operating flights from Knoxville to Illinois, such as Southwest,United Airlines, andAllegiant Air. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Knoxville 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 Knoxville to Illinois
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Complete your trip
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Find flights from Knoxville to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Knoxville and Illinois flights
Browse other Knoxville and Illinois flight options. Last updated on November 12, 2026.
Popular flight searches
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Knoxville to Illinois flights
Consider these flights traveling from Knoxville to Illinois.
Top 3 airlines flying from Knoxville to Illinois
Discover the top 3 airlines that operate flights from Knoxville 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 November 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$78 | Average$141 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$335 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$207 | Average$360 | FlexibilityNo cancel fee | On-time71% |