$101+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Apr 16 — Apr 231
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 March 17, 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 March 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:32 pm
TYS
- ORD
1 stop26h 22m
Multiple Airlines
Wed 4/227:15 pm
ORD
- TYS
1 stop24h 27m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/149:40 pm
TYS
- ORD
1 stop27h 19m
Multiple Airlines
Tue 5/197:45 pm
ORD
- TYS
1 stop21h 14m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/239:32 pm
TYS
- ORD
1 stop13h 04m
Multiple Airlines
Tue 4/281:27 pm
ORD
- TYS
1 stop20h 09m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$225
This American Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:31 am
TYS
- ORD
Nonstop2h 04m
American Airlines
Sun 4/125:24 pm
ORD
- TYS
Nonstop1h 54m
American Airlines
Deal found 3/16![American Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 3/12. 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.
Wed 6/35:50 pm
TYS
- MDW
1 stop5h 25m
Southwest
Wed 6/109:00 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 3/12![Southwest logo]()
$229
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 5/98:48 pm
TYS
- ORD
Nonstop2h 09m
American Airlines
Sun 5/105:24 pm
ORD
- TYS
Nonstop1h 54m
American Airlines
Deal found 3/13![American Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/72:56 pm
TYS
- ORD
1 stop27h 19m
Multiple Airlines
Thu 4/912:00 pm
ORD
- TYS
1 stop9h 05m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$234
This Southwest deal was found by Cheapflights users on 3/12. 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 5/55:50 pm
TYS
- MDW
1 stop5h 25m
Southwest
Sat 5/96:10 am
MDW
- TYS
1 stop6h 10m
Southwest
Deal found 3/12![Southwest logo]()
$239
This Southwest deal was found by Cheapflights users on 3/12. 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.
Wed 5/67:05 am
TYS
- ORD
1 stop6h 45m
Southwest
Sun 5/102:40 pm
ORD
- TYS
1 stop5h 25m
Southwest
Deal found 3/12![Southwest logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:27 am
TYS
- ORD
1 stop8h 08m
Multiple Airlines
Sun 4/125:25 am
ORD
- TYS
1 stop16h 08m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$240
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/37:00 am
TYS
- ORD
Nonstop1h 55m
United Airlines
Sun 4/57:15 am
ORD
- TYS
Nonstop1h 53m
United Airlines
Deal found 3/13![United Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/149:40 pm
TYS
- ORD
1 stop12h 51m
Multiple Airlines
Sun 5/175:30 pm
ORD
- TYS
1 stop27h 54m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$243
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 March 17, 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 March 17, 2026.
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/146:01 pm
TYS
- ORD
Nonstop1h 54m
United Airlines
Tue 5/192:10 pm
ORD
- TYS
Nonstop1h 58m
United Airlines
Deal found 3/12![United Airlines logo]()
$229
This Southwest deal was found by Cheapflights users on 3/12. 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 5/1212:50 pm
TYS
- ORD
1 stop6h 35m
Southwest
Tue 5/192:40 pm
ORD
- TYS
1 stop4h 00m
Southwest
Deal found 3/12![Southwest logo]()
$229
This Delta deal was found by Cheapflights users on 3/12. 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 5/85:59 pm
TYS
- MDW
1 stop4h 10m
Delta
Sun 5/106:23 am
MDW
- TYS
1 stop5h 47m
Delta
Deal found 3/12![Delta logo]()
$249
This American Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:40 am
TYS
- BMI
1 stop4h 21m
American Airlines
Mon 4/62:56 pm
BMI
- TYS
1 stop5h 28m
American Airlines
Deal found 3/14![American Airlines logo]()
$294
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/146:01 pm
TYS
- ORD
Nonstop1h 54m
United Airlines
Mon 5/186:00 pm
ORD
- TYS
Nonstop1h 45m
United Airlines
Deal found 3/12![United Airlines logo]()
$229
This eDestinos deal was found by Cheapflights users on 3/12. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/264:31 pm
TYS
- BMI
1 stop16h 28m
Allegiant Air
Sun 5/39:33 am
BMI
- TYS
1 stop10h 41m
Allegiant Air
Deal found 3/12![Allegiant Air logo]()
$463
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/96:45 pm
TYS
- MDW
1 stop5h 45m
Southwest
Sun 4/126:00 am
MDW
- TYS
1 stop8h 15m
Southwest
Deal found 3/13![Southwest logo]()
$249
This Delta deal was found by Cheapflights users on 3/12. 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 7/34:00 pm
TYS
- ORD
1 stop5h 18m
Delta
Tue 7/712:10 pm
ORD
- TYS
1 stop4h 09m
Delta
Deal found 3/12![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:50 pm
TYS
- ORD
1 stop6h 35m
Southwest
Mon 4/132:40 pm
ORD
- TYS
1 stop4h 40m
Southwest
Deal found 3/14![Southwest logo]()
$249
This United Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:00 am
TYS
- ORD
Nonstop1h 55m
United Airlines
Sat 4/1810:30 am
ORD
- TYS
Nonstop1h 44m
United Airlines
Deal found 3/16![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/1811:02 am
TYS
- ORD
1 stop6h 16m
Delta
Mon 4/201:36 pm
ORD
- TYS
1 stop6h 44m
Delta
Deal found 3/13![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:20 am
TYS
- ORD
Nonstop2h 08m
United Airlines
Sat 7/115:50 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 3/14![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:40 am
TYS
- STL
1 stop7h 55m
Southwest
Tue 5/195:45 am
STL
- TYS
1 stop7h 35m
Southwest
Deal found 3/12![Southwest logo]()
$250
This American Airlines deal was found by Cheapflights users on 3/12. 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 4/34:15 pm
TYS
- MLI
1 stop6h 43m
American Airlines
Sun 4/56:00 am
MLI
- TYS
1 stop3h 48m
American Airlines
Deal found 3/12![American Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:45 pm
TYS
- MDW
1 stop5h 45m
Southwest
Mon 4/2011:45 am
MDW
- TYS
2 stops7h 35m
Southwest
Deal found 3/15![Southwest logo]()
$254
This American Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:40 am
TYS
- PIA
1 stop5h 59m
American Airlines
Mon 4/66:27 pm
PIA
- TYS
1 stop4h 23m
American Airlines
Deal found 3/14![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:38 pm
TYS
- MDW
1 stop6h 50m
Delta
Sun 4/196:00 am
MDW
- TYS
1 stop4h 17m
Delta
Deal found 3/16![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:50 pm
TYS
- ORD
1 stop6h 35m
Southwest
Tue 5/125:55 am
ORD
- TYS
1 stop10h 15m
Southwest
Deal found 3/14![Southwest logo]()
$254
This Delta deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/15:54 pm
TYS
- MDW
1 stop5h 34m
Delta
Sat 5/96:23 am
MDW
- TYS
1 stop3h 46m
Delta
Deal found 3/15![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/166:35 am
TYS
- ORD
2 stops9h 55m
Southwest
Mon 4/202:40 pm
ORD
- TYS
1 stop4h 40m
Southwest
Deal found 3/13![Southwest logo]()
$254
This American Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/277:40 am
TYS
- BMI
1 stop4h 21m
American Airlines
Mon 3/303:45 pm
BMI
- TYS
1 stop7h 06m
American Airlines
Deal found 3/16![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:20 am
TYS
- PIA
1 stop6h 37m
United Airlines
Tue 6/91:21 pm
PIA
- TYS
1 stop6h 35m
United Airlines
Deal found 3/15![United Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/144:38 pm
TYS
- MDW
1 stop6h 50m
Delta
Sat 4/185:21 pm
MDW
- TYS
1 stop5h 33m
Delta
Deal found 3/16![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/166:35 am
TYS
- MDW
2 stops9h 40m
Southwest
Mon 4/2011:40 am
MDW
- TYS
2 stops7h 40m
Southwest
Deal found 3/13![Southwest logo]()
$259
This United Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:00 am
TYS
- PIA
1 stop4h 02m
United Airlines
Mon 4/65:35 pm
PIA
- TYS
1 stop3h 59m
United Airlines
Deal found 3/14![United Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/296:00 am
TYS
- PIA
1 stop9h 12m
Allegiant Air
Thu 4/25:05 pm
PIA
- TYS
1 stop19h 24m
Allegiant Air
Deal found 3/14![Allegiant Air logo]()
$520
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:35 am
TYS
- ORD
1 stop7h 15m
Southwest
Mon 4/202:40 pm
ORD
- TYS
1 stop4h 40m
Southwest
Deal found 3/15![Southwest logo]()
$269
This United Airlines deal was found by Cheapflights users on 3/11. 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 4/107:00 am
TYS
- STL
1 stop4h 45m
United Airlines
Tue 4/148:30 am
STL
- TYS
1 stop5h 39m
United Airlines
Deal found 3/11![United Airlines logo]()
$326
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:40 am
TYS
- MLI
1 stop5h 40m
Delta
Tue 6/95:00 pm
MLI
- TYS
1 stop5h 46m
Delta
Deal found 3/16![Delta logo]()
$329
This American Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:45 am
TYS
- MLI
2 stops7h 47m
American Airlines
Mon 4/61:30 pm
MLI
- TYS
1 stop6h 54m
American Airlines
Deal found 3/14![American Airlines logo]()
$404
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated March 17, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated March 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 4/17:00 am
TYS
- ORD
Nonstop1h 55m
United Airlines
Tue 4/77:15 am
ORD
- TYS
Nonstop1h 53m
United Airlines
Deal found 3/12![United Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/37:00 am
TYS
- ORD
Nonstop1h 55m
United Airlines
Sun 4/57:15 am
ORD
- TYS
Nonstop1h 53m
United Airlines
Deal found 3/13![United Airlines logo]()
$241
This Southwest deal was found by Cheapflights users on 3/12. 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 4/67:25 pm
TYS
- STL
1 stop5h 40m
Southwest
Tue 4/78:25 am
STL
- TYS
1 stop4h 55m
Southwest
Deal found 3/12![Southwest logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/72:56 pm
TYS
- ORD
1 stop27h 19m
Multiple Airlines
Thu 4/912:00 pm
ORD
- TYS
1 stop9h 05m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$234
This American Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:31 am
TYS
- ORD
Nonstop2h 04m
American Airlines
Sun 4/128:30 am
ORD
- TYS
Nonstop1h 48m
American Airlines
Deal found 3/15![American Airlines logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:27 am
TYS
- ORD
1 stop8h 08m
Multiple Airlines
Sun 4/125:25 am
ORD
- TYS
1 stop16h 08m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$240
This Southwest deal was found by Cheapflights users on 3/12. 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 4/96:45 pm
TYS
- MDW
1 stop5h 45m
Southwest
Sun 4/126:00 am
MDW
- TYS
1 stop8h 15m
Southwest
Deal found 3/12![Southwest logo]()
$249
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:45 pm
TYS
- MDW
2 stops5h 00m
Southwest
Sun 4/126:00 am
MDW
- TYS
1 stop8h 15m
Southwest
Deal found 3/15![Southwest logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:32 pm
TYS
- ORD
1 stop26h 22m
Multiple Airlines
Wed 4/227:15 pm
ORD
- TYS
1 stop24h 27m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$208
This United Airlines deal was found by Cheapflights users on 3/11. 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 4/167:00 am
TYS
- ORD
Nonstop1h 55m
United Airlines
Sun 4/197:50 pm
ORD
- TYS
Nonstop1h 44m
United Airlines
Deal found 3/11![United Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/239:32 pm
TYS
- ORD
1 stop13h 04m
Multiple Airlines
Tue 4/281:27 pm
ORD
- TYS
1 stop20h 09m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/271:15 pm
TYS
- ORD
2 stops21h 47m
Multiple Airlines
Tue 4/287:15 pm
ORD
- TYS
1 stop14h 21m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$251
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 March 17, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
This Booking.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/118:32 pm
TYS
- ORD
1 stop25h 05m
Frontier
Deal found 3/15![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/149:40 pm
TYS
- ORD
1 stop27h 19m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 4/154:25 pm
TYS
- ORD
1 stop29h 52m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$113
This Southwest deal was found by Cheapflights users on 3/12. 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 4/2112:50 pm
TYS
- MDW
1 stop5h 40m
Southwest
Deal found 3/12![Southwest logo]()
$115
This Southwest deal was found by Cheapflights users on 3/12. 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 4/2112:50 pm
TYS
- ORD
1 stop6h 35m
Southwest
Deal found 3/12![Southwest logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/169:32 pm
TYS
- ORD
1 stop27h 52m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$119
This Southwest deal was found by Cheapflights users on 3/11. 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.
Wed 4/16:35 am
TYS
- ORD
1 stop7h 15m
Southwest
Deal found 3/11![Southwest logo]()
$120
This Booking.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:32 pm
TYS
- ORD
1 stop25h 05m
Frontier
Deal found 3/15![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:25 pm
TYS
- ORD
1 stop9h 02m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$124
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:50 pm
TYS
- STL
1 stop5h 10m
Southwest
Deal found 3/16![Southwest logo]()
$125
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:50 pm
TYS
- MDW
1 stop5h 40m
Southwest
Deal found 3/15![Southwest logo]()
$125
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:05 am
TYS
- ORD
1 stop6h 45m
Southwest
Deal found 3/15![Southwest logo]()
$125
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 March 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $208 (Kiwi.com) |
One-way from | $101 (Booking.com) |
Popular in | March |
Cheapest in | January |
Average price | $407 |
Good round-trip deal | $113 or less |
Good one-way deal | $216 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 March 17, 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
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 5/14
6:01 pm-6:55 pm
Nonstop1h 54m
Chicago O'Hare Intl
Tue 5/19
2:10 pm-5:08 pm
Nonstop1h 58m
$229
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Tue 5/12
12:50 pm-6:25 pm
1 stop6h 35m
Chicago O'Hare Intl
Tue 5/19
2:40 pm-7:40 pm
1 stop4h 00m
$229
Quickest round-trip
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 5/14
6:01 pm-6:55 pm
Nonstop1h 54m
Chicago O'Hare Intl
Mon 5/18
6:00 pm-8:45 pm
Nonstop1h 45m
$229
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Fri 5/8
5:59 pm-9:09 pm
1 stop4h 10m
Chicago Midway
Sun 5/10
6:23 am-1:10 pm
1 stop5h 47m
$249
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Thu 4/9
6:45 pm-11:30 pm
1 stop5h 45m
Chicago Midway
Sun 4/12
6:00 am-3:15 pm
1 stop8h 15m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Wed 4/8
12:50 pm-6:25 pm
1 stop6h 35m
Chicago O'Hare Intl
Mon 4/13
2:40 pm-8:20 pm
1 stop4h 40m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 4/16
7:00 am-7:55 am
Nonstop1h 55m
Chicago O'Hare Intl
Sat 4/18
10:30 am-1:14 pm
Nonstop1h 44m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Fri 7/10
8:20 am-9:28 am
Nonstop2h 08m
Chicago O'Hare Intl
Sat 7/11
5:50 pm-8:39 pm
Nonstop1h 49m
$249
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Sat 5/16
6:40 am-1:35 pm
1 stop7h 55m
Lambert-St Louis
Tue 5/19
5:45 am-2:20 pm
1 stop7h 35m
$250
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Fri 4/10
6:45 pm-11:30 pm
1 stop5h 45m
Chicago Midway
Mon 4/20
11:45 am-8:20 pm
2 stops7h 35m
$254
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-ORD
TYS-STL
TYS-BMI
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-STL
TYS-BMI
What is the cheapest month to book a flight from Knoxville to Illinois?
Currently, August is the cheapest month in which you can book a flight from Knoxville to Illinois (average of $60). Flying from Knoxville to Illinois in January is currently the most expensive (average of $189). 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 March 17, 2026.
It’s typically best to fly out from Knoxville to Illinois in the morning. Doing so could potentially save you 33% on the flight price compared to flying in the evening, which is usually more expensive.
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 Wednesday at noon when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 March 17, 2026.
The most flights from TYS to USIL are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).
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 March 17, 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
6.6
Overall
7.4
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Comfort
7.3
Food
6.6
Overall
7.4
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
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 March 17, 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 March 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$60 | Average$104 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$340 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$276 | FlexibilityNo cancel fee | On-time71% |