$68+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Oct 13 — Oct 201
Round-trip
1 adult, Economy
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Find cheap flights from Knoxville to Illinois with Cheapflights
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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 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 September 13, 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 September 13, 2026.
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.
Wed 10/147:17 am -
1 stop6h 18m
Sat 10/1711:31 am -
1 stop5h 49m
Deal found 9/10![American Airlines logo]()
$243
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.
Thu 12/37:55 am -
2 stops12h 30m
Sat 12/57:00 am -
1 stop4h 00m
Deal found 9/9![Southwest logo]()
$254
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.
Thu 10/16:00 am -
1 stop5h 48m
Mon 10/53:11 pm -
1 stop4h 38m
Deal found 9/8![United Airlines logo]()
$255
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.
Sat 11/72:50 pm -
1 stop5h 45m
Wed 11/118:00 am -
1 stop3h 20m
Deal found 9/8![Southwest logo]()
$259
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.
Mon 10/262:12 pm -
1 stop9h 27m
Thu 10/294:42 pm -
1 stop23h 55m
Deal found 9/8![Multiple Airlines logo]()
$260
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 10/11:37 pm -
2 stops29h 14m
Mon 10/512:56 pm -
Nonstop1h 25m
Deal found 9/11![Multiple Airlines logo]()
$261
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.
Fri 10/96:55 pm -
1 stop28h 44m
Tue 10/138:04 am -
1 stop25h 01m
Deal found 9/8![Multiple Airlines logo]()
$263
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.
Mon 10/267:25 pm -
1 stop5h 30m
Thu 10/2912:45 pm -
1 stop7h 50m
Deal found 9/8![Southwest logo]()
$264
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 11/131:49 pm -
Nonstop1h 37m
Sun 11/156:42 pm -
2 stops23h 19m
Deal found 9/12![Multiple Airlines logo]()
$265
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.
Fri 10/3012:57 pm -
1 stop10h 46m
Thu 11/58:00 am -
1 stop13h 37m
Deal found 9/11![Multiple Airlines logo]()
$265
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 12/2510:56 am -
1 stop6h 08m
Fri 1/19:00 am -
1 stop5h 57m
Deal found 9/10![Delta logo]()
$267
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.
Fri 10/23:38 pm -
1 stop5h 56m
Mon 10/512:56 pm -
Nonstop1h 25m
Deal found 9/10![Allegiant Air logo]()
$268
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 September 13, 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 September 13, 2026.
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:17 am -
1 stop6h 18m
Sat 10/1711:31 am -
1 stop5h 49m
Deal found 9/8![American Airlines logo]()
$243
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.
Thu 10/16:00 am -
1 stop5h 48m
Mon 10/53:11 pm -
1 stop4h 38m
Deal found 9/8![United Airlines logo]()
$255
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.
Thu 10/227:25 pm -
2 stops6h 45m
Mon 11/25:20 am -
1 stop8h 40m
Deal found 9/10![Southwest logo]()
$270
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:23 pm -
1 stop6h 34m
Tue 10/278:05 am -
1 stop6h 21m
Deal found 9/9![Delta logo]()
$299
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 10/11:37 pm -
2 stops24h 33m
Mon 10/55:19 pm -
1 stop18h 41m
Deal found 9/8![Multiple Airlines logo]()
$302
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:42 am -
Nonstop1h 58m
Mon 10/196:59 am -
Nonstop1h 46m
Deal found 9/11![United Airlines logo]()
$279
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:05 pm -
1 stop6h 53m
Sun 11/225:43 pm -
1 stop5h 04m
Deal found 9/8![American Airlines logo]()
$299
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.
Fri 10/307:25 pm -
2 stops6h 45m
Mon 11/212:55 pm -
2 stops7h 45m
Deal found 9/9![Southwest logo]()
$302
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.
Fri 10/96:23 pm -
1 stop5h 14m
Tue 10/134:26 pm -
1 stop4h 56m
Deal found 9/8![Delta logo]()
$319
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:55 pm -
1 stop6h 04m
Tue 10/135:00 am -
2 stops11h 33m
Deal found 9/8![American Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 9/7. 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.
Thu 10/157:25 pm -
2 stops6h 45m
Sat 10/179:55 am -
1 stop8h 45m
Deal found 9/7![Southwest logo]()
$315
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:57 pm -
1 stop6h 36m
Mon 10/191:27 pm -
1 stop3h 57m
Deal found 9/11![Delta logo]()
$319
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 12/58:34 pm -
1 stop4h 25m
Mon 6/286:02 pm -
1 stop4h 51m
Deal found 9/11![American Airlines logo]()
$314
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
Nonstop1h 56m
Tue 10/66:06 pm -
1 stop4h 53m
Deal found 9/11![United Airlines logo]()
$349
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.
Fri 10/237:25 pm -
2 stops6h 45m
Sun 10/253:00 pm -
2 stops6h 45m
Deal found 9/10![Southwest logo]()
$319
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:00 pm -
1 stop4h 05m
Sun 11/295:30 am -
1 stop4h 58m
Deal found 9/9![Delta logo]()
$319
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.
Thu 10/2910:43 am -
Nonstop2h 06m
Mon 11/22:07 pm -
Nonstop1h 52m
Deal found 9/8![United Airlines logo]()
$349
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.
Fri 11/1312:50 pm -
2 stops9h 00m
Mon 11/161:15 pm -
2 stops6h 30m
Deal found 9/10![Southwest logo]()
$337
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/57:07 am -
1 stop4h 19m
Wed 2/1011:00 am -
1 stop6h 13m
Deal found 9/12![Delta logo]()
$339
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:15 am -
1 stop7h 55m
Mon 10/261:08 pm -
1 stop6h 46m
Deal found 9/11![United Airlines logo]()
$359
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.
Tue 10/138:20 am -
1 stop8h 45m
Wed 10/141:40 pm -
2 stops5h 30m
Deal found 9/9![Southwest logo]()
$338
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.
Thu 10/110:26 am -
1 stop7h 03m
Mon 10/56:00 am -
1 stop4h 18m
Deal found 9/8![Delta logo]()
$339
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.
Tue 10/66:00 am -
1 stop7h 03m
Wed 10/75:00 am -
1 stop4h 23m
Deal found 9/11![American Airlines logo]()
$387
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.
Fri 10/26:00 am -
Nonstop1h 56m
Sat 10/106:59 am -
Nonstop1h 46m
Deal found 9/10![United Airlines logo]()
$363
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/67:07 am -
1 stop4h 19m
Thu 2/1111:00 am -
1 stop6h 13m
Deal found 9/12![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.
Fri 10/167:25 pm -
1 stop5h 30m
Mon 10/192:50 pm -
2 stops5h 45m
Deal found 9/11![Southwest logo]()
$342
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/76:40 am -
Nonstop2h 10m
Mon 1/116:55 am -
Nonstop1h 55m
Deal found 9/12![United Airlines logo]()
$369
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:06 pm -
1 stop5h 08m
Sun 10/186:04 am -
1 stop6h 36m
Deal found 9/12![Delta logo]()
$359
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 9/308:05 am -
1 stop7h 45m
Wed 10/710:55 am -
2 stops8h 15m
Deal found 9/9![Southwest logo]()
$380
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 10/16:00 am -
1 stop5h 12m
Mon 10/52:28 pm -
1 stop5h 21m
Deal found 9/10![United Airlines logo]()
$392
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated September 13, 2026 and is based on user searches.
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.
Thu 10/16:00 am -
1 stop5h 48m
Mon 10/53:11 pm -
1 stop4h 38m
Deal found 9/8![United Airlines logo]()
$255
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 10/11:37 pm -
2 stops29h 14m
Mon 10/512:56 pm -
Nonstop1h 25m
Deal found 9/11![Multiple Airlines logo]()
$261
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.
Fri 10/23:38 pm -
1 stop5h 56m
Mon 10/512:56 pm -
Nonstop1h 25m
Deal found 9/10![Allegiant Air logo]()
$268
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.
Fri 10/96:55 pm -
1 stop28h 44m
Tue 10/138:04 am -
1 stop25h 01m
Deal found 9/8![Multiple Airlines logo]()
$263
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.
Wed 10/147:17 am -
1 stop6h 18m
Sat 10/1711:31 am -
1 stop5h 49m
Deal found 9/10![American Airlines logo]()
$243
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.
Thu 10/157:25 pm -
2 stops6h 45m
Mon 10/1911:10 am -
2 stops10h 35m
Deal found 9/8![Southwest logo]()
$275
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:52 pm -
1 stop18h 56m
Mon 10/261:26 pm -
Nonstop1h 25m
Deal found 9/9![Allegiant Air logo]()
$271
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.
Mon 10/267:25 pm -
1 stop5h 30m
Mon 11/27:20 am -
1 stop6h 40m
Deal found 9/8![Southwest logo]()
$259
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.
Mon 10/262:12 pm -
1 stop9h 27m
Thu 10/294:42 pm -
1 stop23h 55m
Deal found 9/8![Multiple Airlines logo]()
$260
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.
Mon 10/267:25 pm -
1 stop5h 30m
Thu 10/2912:45 pm -
1 stop7h 50m
Deal found 9/8![Southwest logo]()
$264
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.
Tue 10/278:20 am -
1 stop8h 45m
Thu 10/292:50 pm -
2 stops5h 45m
Deal found 9/10![Southwest logo]()
$270
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.
Fri 10/3012:57 pm -
1 stop10h 46m
Thu 11/58:00 am -
1 stop13h 37m
Deal found 9/11![Multiple Airlines logo]()
$265
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 September 13, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:08 pm -
Nonstop1h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Allegiant Air logo]()
$68
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.
Mon 10/1912:04 pm -
Nonstop1h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Allegiant Air logo]()
$114
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.
Fri 10/163:54 pm -
1 stop7h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$118
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.
Fri 10/96:55 pm -
1 stop28h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$121
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.
Fri 10/21:02 pm -
Nonstop1h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Allegiant Air logo]()
$123
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.
Tue 10/137:04 pm -
1 stop21h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$123
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 10/239:41 pm -
1 stop13h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Allegiant Air logo]()
$130
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.
Thu 10/87:25 pm -
1 stop5h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Southwest logo]()
$130
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.
Fri 11/131:17 pm -
1 stop10h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$131
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 10/205:15 pm -
2 stops7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Southwest logo]()
$135
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.
Wed 10/144:14 pm -
1 stop24h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$135
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:04 pm -
1 stop22h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$138
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 September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $243 (American Airlines) |
One-way from | $68 (Trip.com) |
Popular in | March |
Cheapest in | January |
Average price | $353 |
Good round-trip deal | $200 or less |
Good one-way deal | $291 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 September 13, 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
KnoxvilleMoline
TYS Knoxville McGhee Tyson - MLI Moline Quad-City
TYSMLI
Knoxville McGhee Tyson
Fri 10/23
9:41 pm-10:39 am
1 stop13h 58m
Moline Quad-City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$130
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Mon 10/19
7:25 pm-11:55 pm
1 stop5h 30m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$130
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Thu 10/8
7:25 pm-11:55 pm
1 stop5h 30m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$130
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Sat 12/12
7:10 am-5:20 pm
2 stops11h 10m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$141
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Fri 10/16
3:54 pm-11:43 pm
2 stops32h 49m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$152
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Wed 10/7
5:15 pm-10:15 pm
1 stop6h 00m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$153
KnoxvilleMoline
TYS Knoxville McGhee Tyson - MLI Moline Quad-City
TYSMLI
Knoxville McGhee Tyson
Fri 10/23
9:41 pm-7:49 am
3 stops35h 08m
Moline Quad-City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Sun 11/22
7:25 pm-12:05 am
1 stop5h 40m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$175
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Mon 12/14
1:00 pm-10:40 pm
2 stops10h 40m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$175
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Fri 10/16
7:25 pm-11:55 pm
1 stop5h 30m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$175
Showing 1-10 of 60 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-STL
TYS-MDW
TYS-ORD
TYS-MLI
TYS-PIA
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-STL
TYS-MDW
TYS-ORD
TYS-MLI
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 $236). Flying from Knoxville to Illinois in September is currently the most expensive (average of $349). 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 September 13, 2026.
It’s typically best to fly out from Knoxville to Illinois in the morning. Doing so could potentially save you 27% 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 September 13, 2026.
The most flights from TYS to USIL are scheduled on a Monday (37 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (21 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 $284 and $415 in October.The cheapest round-trip price found within the last 5 days was $260 on Multiple Airlines (Oct 26-Oct 29).
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 Monday afternoons when fares are most often at their lowest. Wednesday 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 September 13, 2026.
Read through reviews of airlines operating flights from Knoxville to Illinois, such as United Airlines,Allegiant Air, andAmerican Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Food
6.7
Boarding
7.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Food
6.7
Boarding
7.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Food
6.7
Boarding
7.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Food
6.7
Boarding
7.7
Overall
7.4
Entertainment
7.1
Crew
8.1
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
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
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Knoxville to Illinois by cabin class
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Knoxville and Illinois flights
Browse other Knoxville and Illinois flight options. Last updated on September 13, 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 September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$133 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$329 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$363 | FlexibilityNo cancel fee | On-time71% |