$63+ Cheap flights from Knoxville (TYS) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Sep 11 — Sep 181
Round-trip
1 adult, Economy
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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 August 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 August 12, 2026.
This American Airlines deal was found by Cheapflights users on 8/12. 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 9/311:40 am -
1 stop5h 40m
Thu 9/107:00 am -
1 stop4h 53m
Deal found 8/12![American Airlines logo]()
$205
This Southwest deal was found by Cheapflights users on 8/10. 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 11/27:25 pm -
1 stop5h 30m
Tue 11/108:25 am -
1 stop4h 40m
Deal found 8/10![Southwest logo]()
$206
This Southwest deal was found by Cheapflights users on 8/10. 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 10/147:15 am -
1 stop4h 05m
Tue 10/207:05 am -
1 stop8h 35m
Deal found 8/10![Southwest logo]()
$211
This Delta deal was found by Cheapflights users on 8/12. 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.
Tue 11/106:00 am -
1 stop3h 53m
Tue 11/105:37 pm -
1 stop3h 45m
Deal found 8/12![Delta logo]()
$213
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 9/35:15 am -
1 stop5h 17m
Sun 9/65:00 am -
1 stop5h 06m
Deal found 8/11![American Airlines logo]()
$231
This Southwest deal was found by Cheapflights users on 8/12. 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.
Fri 10/1612:50 pm -
2 stops9h 10m
Sat 10/176:30 am -
1 stop6h 45m
Deal found 8/12![Southwest logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/296:56 pm -
1 stop18h 54m
Tue 9/18:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Fri 10/23:38 pm -
1 stop5h 56m
Fri 10/302:26 pm -
Nonstop1h 25m
Deal found 8/9![Allegiant Air logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/242:51 pm -
1 stop9h 17m
Sat 8/298:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Sun 9/137:00 am -
1 stop29h 21m
Sat 9/197:11 am -
1 stop25h 53m
Deal found 8/9![Multiple Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 9/810:29 am -
1 stop13h 39m
Tue 9/157:11 am -
1 stop25h 53m
Deal found 8/9![Multiple Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/274:52 pm -
1 stop20h 58m
Tue 9/18:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$247
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 August 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 August 12, 2026.
This Southwest deal was found by Cheapflights users on 8/10. 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 11/27:25 pm -
1 stop5h 30m
Tue 11/108:25 am -
1 stop4h 40m
Deal found 8/10![Southwest logo]()
$206
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Sat 9/57:00 am -
1 stop6h 03m
Fri 9/1110:53 am -
1 stop5h 05m
Deal found 8/9![United Airlines logo]()
$211
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Fri 9/188:00 am -
Nonstop2h 10m
Tue 9/227:51 pm -
Nonstop1h 51m
Deal found 8/12![American Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 8/8. 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.
Tue 9/156:13 pm -
1 stop5h 31m
Tue 9/225:11 pm -
1 stop5h 44m
Deal found 8/8![Delta logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 10/2312:57 pm -
2 stops22h 42m
Fri 10/305:48 pm -
1 stop23h 33m
Deal found 8/10![Allegiant Air logo]()
$342
This Southwest deal was found by Cheapflights users on 8/11. 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 9/247:10 am -
2 stops6h 05m
Mon 9/288:00 am -
1 stop3h 20m
Deal found 8/11![Southwest logo]()
$254
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Fri 9/47:00 am -
Nonstop1h 56m
Tue 9/89:30 pm -
Nonstop1h 53m
Deal found 8/9![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 8/10. 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 11/137:06 am -
1 stop6h 29m
Mon 11/166:00 am -
1 stop6h 55m
Deal found 8/10![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 8/10. 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 12/101:00 pm -
1 stop7h 30m
Sun 1/177:50 am -
1 stop3h 20m
Deal found 8/10![Southwest logo]()
$257
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Fri 9/258:15 pm -
1 stop5h 12m
Sun 10/45:15 am -
1 stop4h 16m
Deal found 8/11![American Airlines logo]()
$283
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Fri 10/26:00 am -
Nonstop1h 56m
Fri 10/306:55 am -
Nonstop1h 58m
Deal found 8/9![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 8/9. 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.
Sun 9/67:15 am -
1 stop4h 27m
Sun 9/136:40 am -
1 stop3h 43m
Deal found 8/9![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/12. 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 8/271:21 pm -
Nonstop2h 02m
Sun 8/308:14 am -
Nonstop1h 52m
Deal found 8/12![American Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 8/12. 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.
Mon 9/145:45 pm -
2 stops6h 40m
Tue 9/1510:10 am -
2 stops8h 45m
Deal found 8/12![Southwest logo]()
$274
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Mon 10/196:00 am -
Nonstop1h 56m
Wed 10/216:59 am -
Nonstop1h 46m
Deal found 8/12![United Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 8/10. 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.
Wed 9/95:40 am -
1 stop6h 38m
Wed 9/166:08 am -
1 stop6h 13m
Deal found 8/10![Delta logo]()
$299
This American Airlines deal was found by Cheapflights users on 8/9. 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.
Fri 8/287:25 pm -
1 stop4h 34m
Sun 8/306:00 am -
1 stop5h 51m
Deal found 8/9![American Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 8/8. 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 9/1512:45 pm -
2 stops8h 25m
Tue 9/2212:45 pm -
2 stops6h 10m
Deal found 8/8![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 8/10. 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 9/105:40 am -
1 stop6h 38m
Wed 9/166:08 am -
1 stop6h 13m
Deal found 8/10![Delta logo]()
$299
This American Airlines deal was found by Cheapflights users on 8/10. 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.
Tue 9/84:22 pm -
1 stop5h 51m
Tue 9/156:00 am -
1 stop3h 50m
Deal found 8/10![American Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Thu 8/206:02 pm -
Nonstop1h 57m
Sun 8/232:10 pm -
Nonstop1h 48m
Deal found 8/9![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 8/10. 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 9/184:50 pm -
1 stop8h 00m
Mon 9/219:20 am -
2 stops9h 40m
Deal found 8/10![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 8/8. 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.
Sat 8/295:00 pm -
1 stop5h 47m
Mon 8/316:00 am -
1 stop6h 34m
Deal found 8/8![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 8/9. 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 9/246:45 pm -
1 stop5h 45m
Sun 9/276:05 am -
2 stops7h 55m
Deal found 8/9![Southwest logo]()
$299
This United Airlines deal was found by Cheapflights users on 8/11. 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 10/296:45 am -
Nonstop2h 09m
Mon 11/25:59 pm -
Nonstop1h 55m
Deal found 8/11![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 8/9. 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 12/147:10 am -
1 stop5h 55m
Thu 12/175:09 pm -
1 stop5h 48m
Deal found 8/9![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/98:15 pm -
1 stop4h 48m
Wed 9/165:02 am -
2 stops11h 34m
Deal found 8/10![American Airlines logo]()
$361
This Southwest deal was found by Cheapflights users on 8/12. 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.
Fri 9/255:45 pm -
2 stops6h 40m
Sun 9/276:05 am -
2 stops7h 55m
Deal found 8/12![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 8/9. 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.
Fri 8/287:41 pm -
1 stop3h 55m
Sat 8/291:25 pm -
1 stop5h 01m
Deal found 8/9![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 8/9. 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.
Fri 10/25:35 pm -
1 stop7h 08m
Wed 10/75:00 am -
1 stop4h 23m
Deal found 8/9![American Airlines logo]()
$364
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated August 12, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated August 12, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/242:51 pm -
1 stop9h 17m
Sat 8/298:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/242:51 pm -
1 stop9h 17m
Wed 8/268:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/274:52 pm -
1 stop20h 58m
Tue 9/18:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 8/12. 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 8/278:25 am -
1 stop6h 40m
Wed 9/912:45 pm -
2 stops6h 10m
Deal found 8/12![Southwest logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 8/296:56 pm -
1 stop18h 54m
Tue 9/18:05 am -
1 stop24h 59m
Deal found 8/8![Multiple Airlines logo]()
$236
This American Airlines deal was found by Cheapflights users on 8/12. 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 9/311:40 am -
1 stop5h 40m
Thu 9/107:00 am -
1 stop4h 53m
Deal found 8/12![American Airlines logo]()
$205
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 9/35:15 am -
1 stop5h 17m
Sun 9/65:00 am -
1 stop5h 06m
Deal found 8/11![American Airlines logo]()
$231
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Sat 9/57:00 am -
1 stop6h 03m
Fri 9/1110:53 am -
1 stop5h 05m
Deal found 8/7![United Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
Sun 9/612:52 pm -
2 stops20h 01m
Sat 9/127:11 am -
1 stop25h 53m
Deal found 8/10![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 9/810:29 am -
1 stop13h 39m
Tue 9/157:11 am -
1 stop25h 53m
Deal found 8/9![Multiple Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/107:00 am -
1 stop18h 23m
Mon 9/147:25 am -
1 stop11h 09m
Deal found 8/8![Multiple Airlines logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Sun 9/137:00 am -
1 stop29h 21m
Sat 9/197:11 am -
1 stop25h 53m
Deal found 8/9![Multiple Airlines logo]()
$244
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 August 12, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/163:04 pm -
Nonstop1h 37m
Deal found 8/10![Allegiant Air logo]()
$63
This Southwest deal was found by Cheapflights users on 8/12. 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 11/128:10 am -
1 stop6h 30m
Deal found 8/12![Southwest logo]()
$94
This Southwest deal was found by Cheapflights users on 8/11. 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 12/128:15 am -
1 stop9h 15m
Deal found 8/11![Southwest logo]()
$100
This Southwest deal was found by Cheapflights users on 8/9. 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 9/115:45 pm -
1 stop5h 40m
Deal found 8/9![Southwest logo]()
$102
This Southwest deal was found by Cheapflights users on 8/11. 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 9/105:45 pm -
1 stop5h 25m
Deal found 8/11![Southwest logo]()
$103
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/56:02 pm -
1 stop4h 58m
Deal found 8/8![United Airlines logo]()
$106
This Jetabroad deal was found by Cheapflights users on 8/12. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/511:34 am -
Nonstop1h 32m
Deal found 8/12![Allegiant Air logo]()
$106
This Southwest deal was found by Cheapflights users on 8/12. 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.
Tue 9/158:05 am -
2 stops8h 05m
Deal found 8/12![Southwest logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Mon 9/145:40 pm -
1 stop22h 40m
Deal found 8/12![Multiple Airlines logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 10/229:05 am -
1 stop7h 31m
Deal found 8/12![Multiple Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Sun 10/117:58 pm -
2 stops37h 17m
Deal found 8/11![Multiple Airlines logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 9/910:54 am -
1 stop28h 51m
Deal found 8/8![Multiple Airlines logo]()
$113
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 August 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $205 (American Airlines) |
One-way from | $63 (Cheapflightsfares) |
Popular in | March |
Cheapest in | January |
Average price | $259 |
Good round-trip deal | $112 or less |
Good one-way deal | $104 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 2,558,603 searches. Data last updated August 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
KnoxvilleSt. Louis
TYS Knoxville McGhee Tyson - STL Lambert-St Louis
TYSSTL
Knoxville McGhee Tyson
Mon 11/2
7:25 pm-11:55 pm
1 stop5h 30m
Lambert-St Louis
Tue 11/10
8:25 am-2:05 pm
1 stop4h 40m
$206
KnoxvilleSt. Louis
TYS Knoxville McGhee Tyson - STL Lambert-St Louis
TYSSTL
Knoxville McGhee Tyson
Sat 9/5
7:00 am-12:03 pm
1 stop6h 03m
Lambert-St Louis
Fri 9/11
10:53 am-4:58 pm
1 stop5h 05m
$211
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Thu 9/24
7:10 am-12:15 pm
2 stops6h 05m
Chicago Midway
Mon 9/28
8:00 am-12:20 pm
1 stop3h 20m
$254
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Thu 12/10
1:00 pm-7:30 pm
1 stop7h 30m
Chicago Midway
Sun 1/17
7:50 am-12:10 pm
1 stop3h 20m
$257
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Fri 9/18
8:00 am-9:10 am
Nonstop2h 10m
Chicago O'Hare Intl
Tue 9/22
7:51 pm-10:42 pm
Nonstop1h 51m
$259
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Fri 9/4
7:00 am-7:56 am
Nonstop1h 56m
Chicago O'Hare Intl
Tue 9/8
9:30 pm-12:23 am
Nonstop1h 53m
$259
KnoxvilleChicago
TYS Knoxville McGhee Tyson - ORD Chicago O'Hare Intl
TYSORD
Knoxville McGhee Tyson
Fri 10/2
6:00 am-6:56 am
Nonstop1h 56m
Chicago O'Hare Intl
Fri 10/30
6:55 am-9:53 am
Nonstop1h 58m
$259
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Mon 9/14
5:45 pm-11:25 pm
2 stops6h 40m
Chicago Midway
Tue 9/15
10:10 am-7:55 pm
2 stops8h 45m
$274
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Tue 9/15
6:13 pm-10:44 pm
1 stop5h 31m
Chicago Midway
Tue 9/22
5:11 pm-11:55 pm
1 stop5h 44m
$279
KnoxvilleChicago
TYS Knoxville McGhee Tyson - MDW Chicago Midway
TYSMDW
Knoxville McGhee Tyson
Fri 11/13
7:06 am-12:35 pm
1 stop6h 29m
Chicago Midway
Mon 11/16
6:00 am-1:55 pm
1 stop6h 55m
$279
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-MDW
TYS-STL
TYS-ORD
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-STL
TYS-ORD
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 $236). Flying from Knoxville to Illinois in March is currently the most expensive (average of $345). 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 August 12, 2026.
It’s typically best to fly out from Knoxville to Illinois in the morning. Doing so could potentially save you 28% 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 August 12, 2026.
The most flights from TYS to USIL are scheduled on a Tuesday (35 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 $249 and $339 in August.The cheapest round-trip price found within the last 5 days was $236 on Multiple Airlines (Aug 29-Sep 1).
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 70 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 August 12, 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.
Food
6.7
Comfort
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Food
6.7
Comfort
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Food
6.7
Comfort
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Food
6.7
Comfort
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Overall
7.4
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
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Knoxville and Illinois flights
Browse other Knoxville and Illinois flight options. Last updated on August 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 2,558,603 searches. Data last updated August 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$78 | Average$133 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$319 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$350 | FlexibilityNo cancel fee | On-time71% |