$91+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Aug 11 — Aug 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 July 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 July 12, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/10. 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.
Thu 7/231:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Thu 7/302:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 7/10![Allegiant Air logo]()
$162
This Southwest deal was found by Cheapflights users on 7/10. 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 8/191:55 pm
TYS
- MDW
1 stop6h 20m
Southwest
Sat 8/226:45 am
MDW
- TYS
1 stop5h 30m
Southwest
Deal found 7/10![Southwest logo]()
$182
This Cheapflightsfares deal was found by Cheapflights users on 7/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:04 am
TYS
- MDW
Nonstop1h 32m
Allegiant Air
Mon 10/121:26 pm
MDW
- TYS
Nonstop1h 25m
Allegiant Air
Deal found 7/9![Allegiant Air logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:23 pm
TYS
- MDW
Nonstop1h 36m
Multiple Airlines
Mon 8/106:05 am
MDW
- TYS
2 stops15h 19m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$189
This Southwest deal was found by Cheapflights users on 7/10. 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 10/106:40 am
TYS
- MDW
2 stops9h 10m
Southwest
Wed 10/146:00 am
MDW
- TYS
1 stop7h 40m
Southwest
Deal found 7/10![Southwest logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 8/216:27 pm
TYS
- ORD
1 stop29h 41m
Multiple Airlines
Mon 8/246:05 am
ORD
- TYS
1 stop10h 32m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$194
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:45 pm
TYS
- MDW
1 stop5h 35m
Southwest
Mon 8/249:00 am
MDW
- TYS
2 stops8h 35m
Southwest
Deal found 7/8![Southwest logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/281:26 pm
TYS
- ORD
1 stop27h 33m
Multiple Airlines
Mon 8/318:37 am
ORD
- TYS
1 stop8h 28m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$197
This American Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:52 pm
TYS
- STL
1 stop6h 22m
American Airlines
Wed 8/125:42 am
STL
- TYS
1 stop6h 14m
American Airlines
Deal found 7/8![American Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 7/9. 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 8/712:50 pm
TYS
- MDW
2 stops22h 01m
Multiple Airlines
Sun 8/162:49 pm
MDW
- TYS
Nonstop1h 30m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$201
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:50 pm
TYS
- MDW
1 stop7h 55m
Southwest
Mon 8/249:10 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 7/8![Southwest logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/2012:55 pm
TYS
- ORD
2 stops19h 58m
Multiple Airlines
Mon 8/248:37 am
ORD
- TYS
1 stop8h 58m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$203
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 July 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 July 12, 2026.
This Southwest deal was found by Cheapflights users on 7/10. 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 9/245:45 pm
TYS
- MDW
1 stop5h 35m
Southwest
Sat 9/2611:45 am
MDW
- TYS
2 stops6h 35m
Southwest
Deal found 7/10![Southwest logo]()
$187
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:41 pm
TYS
- STL
1 stop5h 17m
Delta
Mon 8/316:00 am
STL
- TYS
1 stop4h 11m
Delta
Deal found 7/8![Delta logo]()
$224
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:00 am
TYS
- STL
1 stop5h 34m
United Airlines
Thu 8/1312:59 pm
STL
- TYS
1 stop6h 54m
United Airlines
Deal found 7/10![United Airlines logo]()
$245
This American Airlines deal was found by Cheapflights users on 7/11. 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 8/77:34 am
TYS
- ORD
Nonstop2h 11m
American Airlines
Thu 8/133:30 pm
ORD
- TYS
Nonstop1h 52m
American Airlines
Deal found 7/11![American Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:04 pm
TYS
- PIA
1 stop14h 44m
Allegiant Air
Sun 7/267:56 pm
PIA
- TYS
1 stop17h 20m
Allegiant Air
Deal found 7/8![Allegiant Air logo]()
$347
This Southwest deal was found by Cheapflights users on 7/11. 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 9/191:55 pm
TYS
- STL
1 stop8h 40m
Southwest
Tue 9/222:45 pm
STL
- TYS
1 stop3h 10m
Southwest
Deal found 7/11![Southwest logo]()
$211
This Southwest deal was found by Cheapflights users on 7/10. 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 8/211:00 pm
TYS
- MDW
2 stops7h 30m
Southwest
Mon 8/249:20 am
MDW
- TYS
2 stops9h 35m
Southwest
Deal found 7/10![Southwest logo]()
$214
This United Airlines deal was found by Cheapflights users on 7/9. 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 7/316:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sun 8/26:55 am
ORD
- TYS
Nonstop1h 48m
United Airlines
Deal found 7/9![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:41 pm
TYS
- MDW
1 stop3h 55m
Delta
Mon 8/106:05 am
MDW
- TYS
1 stop4h 06m
Delta
Deal found 7/8![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:30 pm
TYS
- MDW
1 stop5h 50m
Southwest
Sun 8/166:10 am
MDW
- TYS
1 stop6h 50m
Southwest
Deal found 7/7![Southwest logo]()
$225
This Delta deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:13 pm
TYS
- ORD
1 stop6h 46m
Delta
Mon 9/211:55 pm
ORD
- TYS
1 stop6h 49m
Delta
Deal found 7/11![Delta logo]()
$269
This American Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:10 pm
TYS
- PIA
1 stop6h 48m
American Airlines
Tue 8/45:05 am
PIA
- TYS
1 stop4h 33m
American Airlines
Deal found 7/11![American Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:10 am
TYS
- STL
2 stops7h 35m
Southwest
Mon 8/317:40 am
STL
- TYS
1 stop4h 45m
Southwest
Deal found 7/8![Southwest logo]()
$230
This United Airlines deal was found by Cheapflights users on 7/11. 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.
Sat 8/2910:40 am
TYS
- STL
1 stop5h 17m
United Airlines
Tue 9/18:50 am
STL
- TYS
1 stop7h 08m
United Airlines
Deal found 7/11![United Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:12 pm
TYS
- ORD
1 stop6h 45m
Delta
Sun 8/95:30 am
ORD
- TYS
1 stop4h 41m
Delta
Deal found 7/8![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:20 am
TYS
- MDW
2 stops6h 05m
Southwest
Sun 10/256:00 am
MDW
- TYS
1 stop8h 35m
Southwest
Deal found 7/10![Southwest logo]()
$231
This American Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:52 pm
TYS
- MLI
1 stop6h 16m
American Airlines
Tue 9/154:03 pm
MLI
- TYS
1 stop4h 03m
American Airlines
Deal found 7/11![American Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:38 am
TYS
- ORD
1 stop5h 39m
Delta
Sun 9/65:30 am
ORD
- TYS
1 stop5h 58m
Delta
Deal found 7/7![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:45 pm
TYS
- MDW
2 stops6h 35m
Southwest
Sun 9/277:15 am
MDW
- TYS
1 stop5h 45m
Southwest
Deal found 7/8![Southwest logo]()
$231
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Fri 7/246:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Fri 7/315:55 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 7/12![United Airlines logo]()
$309
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Sat 8/85:15 am
TYS
- MLI
2 stops6h 58m
American Airlines
Sat 8/154:05 pm
MLI
- TYS
1 stop5h 53m
American Airlines
Deal found 7/9![American Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/228:00 am
TYS
- PIA
1 stop25h 38m
Allegiant Air
Sun 7/267:56 pm
PIA
- TYS
1 stop17h 20m
Allegiant Air
Deal found 7/7![Allegiant Air logo]()
$407
This Southwest deal was found by Cheapflights users on 7/12. 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 8/55:30 pm
TYS
- MDW
1 stop5h 50m
Southwest
Sat 8/226:50 am
MDW
- TYS
1 stop8h 20m
Southwest
Deal found 7/12![Southwest logo]()
$237
This Delta deal was found by Cheapflights users on 7/8. 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
TYS
- BMI
1 stop5h 47m
Delta
Mon 8/316:00 am
BMI
- TYS
1 stop6h 34m
Delta
Deal found 7/8![Delta logo]()
$289
This American Airlines deal was found by Cheapflights users on 7/10. 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.
Sat 8/86:52 pm
TYS
- BMI
1 stop6h 07m
American Airlines
Fri 8/141:46 pm
BMI
- TYS
1 stop3h 36m
American Airlines
Deal found 7/10![American Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 7/9. 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 10/96:00 am
TYS
- ORD
Nonstop1h 56m
United Airlines
Mon 10/126:59 am
ORD
- TYS
Nonstop1h 46m
United Airlines
Deal found 7/9![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:38 am
TYS
- ORD
1 stop5h 39m
Delta
Sun 9/66:40 am
ORD
- TYS
1 stop4h 48m
Delta
Deal found 7/7![Delta logo]()
$294
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:40 pm
TYS
- MDW
1 stop6h 20m
Southwest
Fri 8/285:55 am
MDW
- TYS
1 stop5h 05m
Southwest
Deal found 7/8![Southwest logo]()
$247
This Delta deal was found by Cheapflights users on 7/10. 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.
Sat 10/106:21 pm
TYS
- ORD
1 stop6h 30m
Delta
Thu 10/155:30 am
ORD
- TYS
1 stop4h 31m
Delta
Deal found 7/10![Delta logo]()
$294
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Tue 8/187:00 am
TYS
- PIA
1 stop4h 06m
United Airlines
Sat 8/223:35 pm
PIA
- TYS
1 stop4h 18m
United Airlines
Deal found 7/7![United Airlines logo]()
$359
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated July 12, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated July 12, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 7/10. 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.
Thu 7/231:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Thu 7/302:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 7/10![Allegiant Air logo]()
$162
This American Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:52 pm
TYS
- STL
1 stop6h 22m
American Airlines
Wed 8/125:42 am
STL
- TYS
1 stop6h 14m
American Airlines
Deal found 7/8![American Airlines logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/61:23 pm
TYS
- MDW
Nonstop1h 36m
Multiple Airlines
Mon 8/106:05 am
MDW
- TYS
2 stops15h 19m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/68:15 am
TYS
- MDW
2 stops14h 48m
Multiple Airlines
Sun 8/92:49 pm
MDW
- TYS
Nonstop1h 30m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Thu 8/68:29 pm
TYS
- MDW
2 stops26h 34m
Multiple Airlines
Thu 8/132:49 pm
MDW
- TYS
Nonstop1h 30m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 7/9. 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 8/712:50 pm
TYS
- MDW
2 stops22h 01m
Multiple Airlines
Sun 8/162:49 pm
MDW
- TYS
Nonstop1h 30m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$201
This Southwest deal was found by Cheapflights users on 7/10. 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 8/191:55 pm
TYS
- MDW
1 stop6h 20m
Southwest
Sat 8/226:45 am
MDW
- TYS
1 stop5h 30m
Southwest
Deal found 7/10![Southwest logo]()
$182
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:45 pm
TYS
- MDW
1 stop5h 35m
Southwest
Mon 8/249:00 am
MDW
- TYS
2 stops8h 35m
Southwest
Deal found 7/8![Southwest logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/2012:55 pm
TYS
- ORD
2 stops19h 58m
Multiple Airlines
Mon 8/248:37 am
ORD
- TYS
1 stop8h 58m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 8/216:27 pm
TYS
- ORD
1 stop29h 41m
Multiple Airlines
Mon 8/246:05 am
ORD
- TYS
1 stop10h 32m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$194
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:50 pm
TYS
- MDW
1 stop7h 55m
Southwest
Mon 8/249:10 am
MDW
- TYS
1 stop7h 00m
Southwest
Deal found 7/8![Southwest logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/281:26 pm
TYS
- ORD
1 stop27h 33m
Multiple Airlines
Mon 8/318:37 am
ORD
- TYS
1 stop8h 28m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$197
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 July 12, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated July 12, 2026.
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/134:50 pm
TYS
- MDW
1 stop7h 55m
Southwest
Deal found 7/8![Southwest logo]()
$91
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:45 pm
TYS
- MDW
2 stops8h 25m
Southwest
Deal found 7/8![Southwest logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/131:23 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 7/8![Allegiant Air logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 8/242:51 pm
TYS
- ORD
1 stop9h 17m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$99
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:45 pm
TYS
- STL
1 stop8h 10m
Southwest
Deal found 7/9![Southwest logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 8/106:29 pm
TYS
- ORD
1 stop29h 41m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$100
This Cheapflightsfares deal was found by Cheapflights users on 7/11. 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 8/21:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 7/11![Allegiant Air logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 7/12. 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.
Tue 8/2510:30 am
TYS
- ORD
1 stop13h 38m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:29 pm
TYS
- ORD
1 stop29h 39m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$103
This Booking.com deal was found by Cheapflights users on 7/11. 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 Booking.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 7/11![Allegiant Air logo]()
$105
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:40 am
TYS
- STL
1 stop5h 14m
Delta
Deal found 7/9![Delta logo]()
$112
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/91:23 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 7/8![Allegiant Air 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 July 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $162 (Cheapflightsfares) |
One-way from | $91 (Southwest) |
Popular in | March |
Cheapest in | January |
Average price | $252 |
Good round-trip deal | $107 or less |
Good one-way deal | $77 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 July 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
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Thu 9/24
5:45 pm-10:20 pm
1 stop5h 35m
Chicago Midway
Sat 9/26
11:45 am-7:20 pm
2 stops6h 35m
$187
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Sat 9/19
1:55 pm-9:35 pm
1 stop8h 40m
Lambert-St Louis
Tue 9/22
2:45 pm-6:55 pm
1 stop3h 10m
$211
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Fri 8/21
1:00 pm-7:30 pm
2 stops7h 30m
Chicago Midway
Mon 8/24
9:20 am-7:55 pm
2 stops9h 35m
$214
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Fri 8/28
7:41 pm-11:58 pm
1 stop5h 17m
Lambert-St Louis
Mon 8/31
6:00 am-11:11 am
1 stop4h 11m
$224
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Wed 8/12
5:30 pm-10:20 pm
1 stop5h 50m
Chicago Midway
Sun 8/16
6:10 am-2:00 pm
1 stop6h 50m
$225
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Fri 8/28
7:10 am-1:45 pm
2 stops7h 35m
Lambert-St Louis
Mon 8/31
7:40 am-1:25 pm
1 stop4h 45m
$230
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Thu 10/22
8:20 am-1:25 pm
2 stops6h 05m
Chicago Midway
Sun 10/25
6:00 am-3:35 pm
1 stop8h 35m
$231
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Thu 9/24
5:45 pm-11:20 pm
2 stops6h 35m
Chicago Midway
Sun 9/27
7:15 am-2:00 pm
1 stop5h 45m
$231
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Wed 8/5
5:30 pm-10:20 pm
1 stop5h 50m
Chicago Midway
Sat 8/22
6:50 am-4:10 pm
1 stop8h 20m
$237
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Fri 8/7
6:00 am-10:34 am
1 stop5h 34m
Lambert-St Louis
Thu 8/13
12:59 pm-8:53 pm
1 stop6h 54m
$245
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-PIA
TYS-MLI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Knoxville to Illinois
TYS-USIL
TYS-MDW
TYS-ORD
TYS-STL
TYS-PIA
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 July 12, 2026.
It’s typically best to fly out from Knoxville to Illinois in the morning. Doing so could potentially save you 25% 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 July 12, 2026.
The most flights from TYS to USIL are scheduled on a Saturday (36 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 Wednesday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated July 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.
Boarding
7.7
Crew
8.1
Comfort
7.3
Food
6.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Crew
8.1
Comfort
7.3
Food
6.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Crew
8.1
Comfort
7.3
Food
6.7
Overall
7.4
Entertainment
7.1
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Crew
8.1
Comfort
7.3
Food
6.7
Overall
7.4
Entertainment
7.1
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
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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Knoxville and Illinois flights
Browse other Knoxville and Illinois flight options. Last updated on July 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 July 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$60 | Average$113 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$319 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$349 | FlexibilityNo cancel fee | On-time71% |