$57+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Jul 15 — Jul 221
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 June 15, 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 June 15, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/121:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/192:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$162
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:23 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 8/92:49 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/11![Allegiant Air logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/301:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Fri 7/319:21 pm
MDW
- TYS
1 stop23h 21m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$205
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/192:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$209
This Cheapflightsfares deal was found by Cheapflights users on 6/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/181:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 6/252:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$210
This Southwest deal was found by Cheapflights users on 6/11. 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 8/205:45 pm
TYS
- MDW
1 stop5h 35m
Southwest
Tue 8/251:00 pm
MDW
- TYS
2 stops4h 55m
Southwest
Deal found 6/11![Southwest logo]()
$215
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/51:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/122:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/11![Allegiant Air logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/91:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Fri 7/109:21 pm
MDW
- TYS
1 stop23h 14m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Mon 8/37:20 pm
TYS
- ORD
1 stop28h 50m
Multiple Airlines
Fri 8/78:05 am
ORD
- TYS
1 stop25h 21m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$222
This Southwest deal was found by Cheapflights users on 6/11. 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 8/205:45 pm
TYS
- MDW
1 stop5h 35m
Southwest
Thu 8/279:10 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 6/11![Southwest logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/204:52 pm
TYS
- ORD
1 stop20h 33m
Multiple Airlines
Tue 8/257:55 am
ORD
- TYS
1 stop25h 09m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 8/129:00 am
TYS
- MDW
1 stop24h 24m
Allegiant Air
Sun 8/162:49 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/12![Allegiant Air logo]()
$231
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 June 15, 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 June 15, 2026.
This Southwest deal was found by Cheapflights users on 6/14. 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 8/2612:45 pm
TYS
- MDW
1 stop5h 55m
Southwest
Sat 8/296:45 am
MDW
- TYS
1 stop5h 30m
Southwest
Deal found 6/14![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/217:00 am
TYS
- ORD
Nonstop1h 56m
United Airlines
Sun 8/236:06 pm
ORD
- TYS
Nonstop1h 47m
United Airlines
Deal found 6/11![United Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:04 pm
TYS
- ORD
1 stop6h 55m
American Airlines
Mon 9/216:29 am
ORD
- TYS
1 stop4h 12m
American Airlines
Deal found 6/10![American Airlines logo]()
$269
This Delta deal was found by Cheapflights users on 6/12. 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 10/2211:30 am
TYS
- ORD
1 stop6h 03m
Delta
Sun 10/257:10 am
ORD
- TYS
1 stop6h 55m
Delta
Deal found 6/12![Delta logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Sat 7/48:45 am
TYS
- PIA
1 stop7h 28m
Allegiant Air
Fri 7/107:42 pm
PIA
- TYS
1 stop13h 15m
Allegiant Air
Deal found 6/12![Allegiant Air logo]()
$324
This Southwest deal was found by Cheapflights users on 6/11. 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 8/207:10 am
TYS
- MDW
2 stops6h 05m
Southwest
Tue 8/259:25 am
MDW
- TYS
2 stops8h 30m
Southwest
Deal found 6/11![Southwest logo]()
$249
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Sun 7/196:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sat 7/255:55 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 6/15![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/93:59 pm
TYS
- ORD
1 stop5h 32m
Delta
Thu 7/165:30 am
ORD
- TYS
1 stop4h 40m
Delta
Deal found 6/14![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Thu 7/96:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sun 7/125:59 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 6/14![United Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 6/296:53 pm
TYS
- ORD
1 stop5h 37m
American Airlines
Sun 7/55:07 am
ORD
- TYS
1 stop4h 31m
American Airlines
Deal found 6/10![American Airlines logo]()
$284
This Southwest deal was found by Cheapflights users on 6/10. 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 7/87:10 am
TYS
- MDW
1 stop4h 50m
Southwest
Wed 7/159:00 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 6/10![Southwest logo]()
$265
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Thu 10/156:00 am
TYS
- ORD
Nonstop1h 56m
United Airlines
Sun 10/186:13 pm
ORD
- TYS
Nonstop1h 47m
United Airlines
Deal found 6/14![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 6/13. 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.
Wed 9/165:45 am
TYS
- BMI
1 stop6h 38m
Delta
Wed 9/236:00 am
BMI
- TYS
1 stop4h 05m
Delta
Deal found 6/13![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 6/14. 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 8/185:30 pm
TYS
- MDW
1 stop5h 50m
Southwest
Fri 8/219:10 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 6/14![Southwest logo]()
$268
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/2210:42 am
TYS
- ORD
Nonstop1h 58m
United Airlines
Sun 10/257:20 am
ORD
- TYS
Nonstop1h 39m
United Airlines
Deal found 6/12![United Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/76:10 pm
TYS
- MLI
2 stops7h 31m
American Airlines
Mon 7/134:20 pm
MLI
- TYS
1 stop6h 31m
American Airlines
Deal found 6/10![American Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:00 pm
TYS
- BMI
1 stop5h 47m
Delta
Mon 8/316:00 am
BMI
- TYS
1 stop6h 34m
Delta
Deal found 6/14![Delta logo]()
$289
This United Airlines deal was found by Cheapflights users on 6/11. 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 7/35:45 pm
TYS
- ORD
Nonstop2h 10m
United Airlines
Sun 7/55:59 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 6/11![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 6/12. 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 8/142:05 pm
TYS
- STL
1 stop6h 15m
Southwest
Mon 8/175:15 am
STL
- TYS
2 stops7h 10m
Southwest
Deal found 6/12![Southwest logo]()
$284
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Mon 6/296:43 pm
TYS
- BMI
1 stop6h 52m
American Airlines
Fri 7/35:00 am
BMI
- TYS
1 stop6h 30m
American Airlines
Deal found 6/13![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 6/12. 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 7/33:36 pm
TYS
- MDW
1 stop3h 55m
Delta
Sun 7/59:17 am
MDW
- TYS
1 stop4h 39m
Delta
Deal found 6/12![Delta logo]()
$314
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Thu 7/96:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Thu 7/165:55 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 6/13![United Airlines logo]()
$260
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:45 pm
TYS
- STL
1 stop4h 40m
Southwest
Sun 7/125:50 am
STL
- TYS
2 stops5h 15m
Southwest
Deal found 6/11![Southwest logo]()
$289
This American Airlines deal was found by Cheapflights users on 6/13. 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 8/294:22 pm
TYS
- BMI
2 stops8h 37m
American Airlines
Mon 8/311:46 pm
BMI
- TYS
2 stops8h 12m
American Airlines
Deal found 6/13![American Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 6/12. 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 9/107:30 am
TYS
- MDW
1 stop6h 00m
Delta
Sun 9/135:25 pm
MDW
- TYS
1 stop5h 22m
Delta
Deal found 6/12![Delta logo]()
$324
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/111:35 pm
TYS
- STL
1 stop7h 20m
Southwest
Sat 7/188:25 am
STL
- TYS
1 stop4h 40m
Southwest
Deal found 6/10![Southwest logo]()
$299
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Wed 9/168:15 pm
TYS
- BMI
1 stop4h 48m
American Airlines
Wed 9/235:02 am
BMI
- TYS
2 stops11h 44m
American Airlines
Deal found 6/13![American Airlines logo]()
$351
This United Airlines deal was found by Cheapflights users on 6/14. 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 6/266:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sun 7/56:55 am
ORD
- TYS
Nonstop1h 48m
United Airlines
Deal found 6/14![United Airlines logo]()
$294
This Southwest deal was found by Cheapflights users on 6/10. 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 7/34:20 pm
TYS
- MDW
1 stop8h 50m
Southwest
Tue 7/79:00 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 6/10![Southwest logo]()
$299
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Wed 8/266:02 pm
TYS
- STL
1 stop4h 58m
United Airlines
Thu 8/279:30 am
STL
- TYS
1 stop6h 28m
United Airlines
Deal found 6/11![United Airlines logo]()
$303
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated June 15, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated June 15, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 6/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/181:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 6/252:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$210
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/21:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/52:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/11![Allegiant Air logo]()
$251
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/51:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/122:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/11![Allegiant Air logo]()
$216
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/811:35 am
TYS
- ORD
Nonstop2h 03m
American Airlines
Mon 7/139:40 am
ORD
- TYS
Nonstop1h 50m
American Airlines
Deal found 6/10![American Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/91:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Fri 7/109:21 pm
MDW
- TYS
1 stop23h 14m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 6/14. 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.
Thu 7/93:44 pm
TYS
- MDW
2 stops44h 23m
Multiple Airlines
Thu 7/162:48 pm
MDW
- TYS
Nonstop1h 30m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$259
This United Airlines deal was found by Cheapflights users on 6/11. 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 7/96:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Thu 7/165:55 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 6/11![United Airlines logo]()
$260
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/121:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/192:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 7/123:47 pm
TYS
- MDW
2 stops20h 20m
Multiple Airlines
Thu 7/162:48 pm
MDW
- TYS
Nonstop1h 30m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$261
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Sun 7/192:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$209
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 7/277:02 am
TYS
- ORD
Nonstop2h 08m
American Airlines
Mon 8/37:09 pm
ORD
- TYS
Nonstop1h 49m
American Airlines
Deal found 6/12![American Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/301:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Fri 7/319:21 pm
MDW
- TYS
1 stop23h 21m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$205
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 June 15, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/91:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 6/11![Allegiant Air logo]()
$57
This Super.com deal was found by Cheapflights users on 6/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/121:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$61
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/251:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$67
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/301:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 6/13. 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.
Sun 8/21:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 6/13![Allegiant Air logo]()
$71
This Trip.com deal was found by Cheapflights users on 6/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/261:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 6/12![Allegiant Air logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Sun 7/191:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 6/15![Allegiant Air logo]()
$86
This Southwest deal was found by Cheapflights users on 6/10. 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 8/198:05 am
TYS
- MDW
2 stops8h 20m
Southwest
Deal found 6/10![Southwest logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 6/14. 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.
Fri 7/2410:05 pm
TYS
- MLI
1 stop10h 42m
Allegiant Air
Deal found 6/14![Allegiant Air logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/274:52 pm
TYS
- ORD
1 stop20h 33m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 7/137:20 pm
TYS
- ORD
1 stop28h 50m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 7/309:11 pm
TYS
- ORD
1 stop16h 04m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$114
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 June 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $162 (Cheapflightsfares) |
One-way from | $57 (Cheapflightsfares) |
Popular in | March |
Cheapest in | January |
Average price | $277 |
Good round-trip deal | $106 or less |
Good one-way deal | $103 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 June 15, 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 - MDW
TYSMDW
Knoxville McGhee Tyson
Wed 8/26
12:45 pm-5:40 pm
1 stop5h 55m
Chicago Midway
Sat 8/29
6:45 am-1:15 pm
1 stop5h 30m
$247
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Fri 8/21
7:00 am-7:56 am
Nonstop1h 56m
Chicago O'Hare Intl
Sun 8/23
6:06 pm-8:53 pm
Nonstop1h 47m
$249
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Thu 8/20
7:10 am-12:15 pm
2 stops6h 05m
Chicago Midway
Tue 8/25
9:25 am-6:55 pm
2 stops8h 30m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Sun 7/19
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Sat 7/25
5:55 pm-8:44 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 7/9
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Sun 7/12
5:59 pm-8:48 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 10/15
6:00 am-6:56 am
Nonstop1h 56m
Chicago O'Hare Intl
Sun 10/18
6:13 pm-9:00 pm
Nonstop1h 47m
$249
Quickest round-trip
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 10/22
10:42 am-11:40 am
Nonstop1h 58m
Chicago O'Hare Intl
Sun 10/25
7:20 am-9:59 am
Nonstop1h 39m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Fri 7/3
5:45 pm-6:55 pm
Nonstop2h 10m
Chicago O'Hare Intl
Sun 7/5
5:59 pm-8:48 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 7/9
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Thu 7/16
5:55 pm-8:44 pm
Nonstop1h 49m
$260
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Wed 7/8
7:10 am-11:00 am
1 stop4h 50m
Chicago Midway
Wed 7/15
9:00 am-5:00 pm
1 stop7h 00m
$265
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-MLI
TYS-STL
TYS-BMI
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-MLI
TYS-STL
What is the cheapest month to book a flight from Knoxville to Illinois?
Currently, November is the cheapest month in which you can book a flight from Knoxville to Illinois (average of $48). Flying from Knoxville to Illinois in March 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 June 15, 2026.
It’s typically best to fly out from Knoxville to Illinois in the morning. Doing so could potentially save you 19% 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 June 15, 2026.
The most flights from TYS to USIL are scheduled on a Friday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (31 on average).
How much does it cost to fly round-trip from Knoxville to Illinois?
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 Sunday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 15, 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.
Entertainment
7.1
Food
6.6
Boarding
7.7
Crew
8.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Food
6.6
Boarding
7.7
Crew
8.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Food
6.6
Boarding
7.7
Crew
8.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Food
6.6
Boarding
7.7
Crew
8.1
Comfort
7.3
Overall
7.4
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 June 15, 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 June 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$60 | Average$106 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$320 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$347 | FlexibilityNo cancel fee | On-time71% |