$45+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Jun 12 — Jun 191
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 May 13, 2026.
Explore the most affordable flight options available from Knoxville to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 13, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 5/10. 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 5/211:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Sun 5/242:47 pm
MDW
- TYS
Nonstop1h 26m
Allegiant Air
Deal found 5/10![Allegiant Air logo]()
$79
This Cheapflightsfares deal was found by Cheapflights users on 5/9. 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.
Thu 6/251:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Sun 6/282:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/9![Allegiant Air logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/131:49 pm
TYS
- MDW
Nonstop1h 37m
Allegiant Air
Mon 11/164:31 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Thu 6/112:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/71:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 6/252:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/71:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 6/112:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/9![Allegiant Air logo]()
$114
This Booking.com deal was found by Cheapflights users on 5/8. 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 Booking.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
Sun 7/122:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 5/8![Allegiant Air logo]()
$120
This Mytrip deal was found by Cheapflights users on 5/10. 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 Mytrip 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
Sun 7/262:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 5/10![Allegiant Air logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/2912:40 pm
TYS
- ORD
2 stops20h 23m
Multiple Airlines
Fri 7/310:16 am
ORD
- TYS
1 stop22h 41m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 9/247:00 am
TYS
- ORD
1 stop15h 35m
Multiple Airlines
Mon 9/289:26 am
ORD
- TYS
1 stop11h 09m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 9/247:00 am
TYS
- ORD
1 stop15h 35m
Multiple Airlines
Tue 9/294:49 pm
ORD
- TYS
1 stop20h 53m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$236
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Mon 6/296:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Fri 7/37:45 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/9![United Airlines logo]()
$249
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 May 13, 2026.
Discover carefully curated flight deals from Knoxville to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 13, 2026.
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:02 pm
TYS
- ORD
Nonstop1h 58m
United Airlines
Mon 8/172:10 pm
ORD
- TYS
Nonstop1h 48m
United Airlines
Deal found 5/8![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 5/12. 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 6/95:40 pm
TYS
- STL
1 stop7h 15m
Southwest
Tue 6/168:25 am
STL
- TYS
1 stop8h 55m
Southwest
Deal found 5/12![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 5/12. 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.
Wed 7/157:15 am
TYS
- MDW
1 stop6h 23m
Delta
Wed 7/2211:05 am
MDW
- TYS
1 stop5h 11m
Delta
Deal found 5/12![Delta logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Sat 5/307:25 am
TYS
- PIA
1 stop8h 53m
Allegiant Air
Sat 6/64:03 pm
PIA
- TYS
1 stop4h 35m
Allegiant Air
Deal found 5/11![Allegiant Air logo]()
$277
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Sat 5/235:36 am
TYS
- PIA
1 stop7h 18m
American Airlines
Sat 5/304:46 pm
PIA
- TYS
1 stop6h 10m
American Airlines
Deal found 5/8![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 5/11. 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 6/196:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sun 6/287:45 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/11![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 5/12. 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 7/285:40 pm
TYS
- STL
1 stop7h 15m
Southwest
Wed 7/2910:20 am
STL
- TYS
1 stop5h 40m
Southwest
Deal found 5/12![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 5/12. 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 6/257:15 am
TYS
- MDW
1 stop6h 31m
Delta
Wed 7/16:00 am
MDW
- TYS
1 stop6h 19m
Delta
Deal found 5/12![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Sat 6/136:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Tue 6/166:07 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/12![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 5/12. 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 6/257:45 pm
TYS
- MDW
1 stop3h 10m
Southwest
Mon 6/295:05 pm
MDW
- TYS
1 stop3h 05m
Southwest
Deal found 5/12![Southwest logo]()
$269
This Delta deal was found by Cheapflights users on 5/12. 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.
Wed 6/247:15 am
TYS
- MDW
1 stop6h 31m
Delta
Tue 6/306:00 am
MDW
- TYS
1 stop6h 19m
Delta
Deal found 5/12![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sat 6/136:07 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/8![United Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 5/11. 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 8/256:00 am
TYS
- MLI
1 stop6h 09m
American Airlines
Sat 9/1211:29 am
MLI
- TYS
1 stop3h 26m
American Airlines
Deal found 5/11![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 5/12. 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 9/257:30 am
TYS
- MDW
1 stop6h 00m
Delta
Mon 9/2810:35 am
MDW
- TYS
1 stop3h 32m
Delta
Deal found 5/12![Delta logo]()
$269
This United Airlines deal was found by Cheapflights users on 5/11. 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 6/256:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sun 6/287:45 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/11![United Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/61:35 pm
TYS
- STL
1 stop4h 50m
Southwest
Sun 6/78:25 am
STL
- TYS
1 stop7h 45m
Southwest
Deal found 5/8![Southwest logo]()
$288
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:15 am
TYS
- MDW
1 stop6h 23m
Delta
Sun 7/266:00 am
MDW
- TYS
1 stop4h 05m
Delta
Deal found 5/9![Delta logo]()
$269
This American Airlines deal was found by Cheapflights users on 5/8. 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.
Tue 5/266:20 pm
TYS
- MLI
1 stop6h 35m
American Airlines
Tue 6/26:00 am
MLI
- TYS
1 stop4h 09m
American Airlines
Deal found 5/8![American Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:25 am
TYS
- PIA
1 stop8h 53m
Allegiant Air
Sat 5/3012:35 pm
PIA
- TYS
2 stops51h 05m
Allegiant Air
Deal found 5/8![Allegiant Air logo]()
$370
This United Airlines deal was found by Cheapflights users on 5/12. 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 6/196:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Mon 6/226:07 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/12![United Airlines logo]()
$260
This Southwest deal was found by Cheapflights users on 5/9. 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.
Sat 6/61:35 pm
TYS
- STL
1 stop4h 50m
Southwest
Fri 6/125:35 pm
STL
- TYS
1 stop2h 35m
Southwest
Deal found 5/9![Southwest logo]()
$289
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:15 am
TYS
- MDW
1 stop6h 23m
Delta
Sun 8/26:00 am
MDW
- TYS
1 stop4h 05m
Delta
Deal found 5/9![Delta logo]()
$269
This American Airlines deal was found by Cheapflights users on 5/10. 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 6/96:07 pm
TYS
- BMI
2 stops7h 28m
American Airlines
Tue 6/164:22 pm
BMI
- TYS
1 stop6h 33m
American Airlines
Deal found 5/10![American Airlines logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:30 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Sat 5/302:02 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/9![United Airlines logo]()
$264
This Southwest deal was found by Cheapflights users on 5/9. 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 6/177:10 am
TYS
- STL
2 stops6h 55m
Southwest
Fri 6/262:15 pm
STL
- TYS
2 stops5h 55m
Southwest
Deal found 5/9![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 5/12. 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.
Wed 6/247:15 am
TYS
- MDW
1 stop6h 31m
Delta
Wed 7/16:00 am
MDW
- TYS
1 stop4h 09m
Delta
Deal found 5/12![Delta logo]()
$269
This Delta deal was found by Cheapflights users on 5/10. 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 9/54:00 pm
TYS
- ORD
1 stop5h 17m
Delta
Mon 9/711:30 am
ORD
- TYS
1 stop4h 57m
Delta
Deal found 5/10![Delta logo]()
$269
This Southwest deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:40 am
TYS
- STL
2 stops7h 55m
Southwest
Mon 6/83:35 pm
STL
- TYS
2 stops5h 55m
Southwest
Deal found 5/9![Southwest logo]()
$299
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Sat 9/56:05 pm
TYS
- MLI
2 stops7h 03m
American Airlines
Mon 9/74:35 pm
MLI
- TYS
1 stop5h 43m
American Airlines
Deal found 5/12![American Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 5/12. 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.
Wed 6/245:40 am
TYS
- ORD
1 stop3h 58m
Delta
Tue 6/305:30 am
ORD
- TYS
1 stop6h 49m
Delta
Deal found 5/12![Delta logo]()
$269
Last-minute flights from Knoxville to IllinoisDiscover last-minute flight deals from Knoxville to Illinois. Data last updated May 13, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Illinois. Data last updated May 13, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 5/10. 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 5/211:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Sun 5/242:47 pm
MDW
- TYS
Nonstop1h 26m
Allegiant Air
Deal found 5/10![Allegiant Air logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Sat 5/237:25 am
TYS
- PIA
1 stop8h 53m
Allegiant Air
Sat 5/304:08 pm
PIA
- TYS
1 stop5h 10m
Allegiant Air
Deal found 5/10![Allegiant Air logo]()
$259
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Thu 6/112:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 5/9. 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 5/281:22 pm
TYS
- MDW
Nonstop1h 35m
Multiple Airlines
Tue 6/212:27 pm
MDW
- TYS
2 stops28h 31m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 6/25:05 pm
TYS
- ORD
2 stops15h 50m
Multiple Airlines
Thu 6/45:11 pm
ORD
- TYS
1 stop29h 28m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$253
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/71:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 6/252:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/71:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 6/112:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/9![Allegiant Air logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/111:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Sun 6/142:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$163
This Cheapflightsfares deal was found by Cheapflights users on 5/9. 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.
Thu 6/251:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Sun 6/282:46 pm
MDW
- TYS
Nonstop1h 28m
Allegiant Air
Deal found 5/9![Allegiant Air logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 6/251:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Thu 7/22:48 pm
MDW
- TYS
Nonstop1h 30m
Allegiant Air
Deal found 5/12![Allegiant Air logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/2912:40 pm
TYS
- ORD
2 stops20h 23m
Multiple Airlines
Fri 7/310:16 am
ORD
- TYS
1 stop22h 41m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$217
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Mon 6/296:00 am
TYS
- ORD
Nonstop1h 59m
United Airlines
Fri 7/37:45 pm
ORD
- TYS
Nonstop1h 49m
United Airlines
Deal found 5/9![United Airlines logo]()
$249
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 May 13, 2026.
Search for one-way flight options from Knoxville to Illinois. Find affordable one-way fares based on user searches. Data last updated May 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 5/281:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Deal found 5/13![Allegiant Air logo]()
$45
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/241:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Deal found 5/9![Allegiant Air logo]()
$62
This Cheapflightsfares deal was found by Cheapflights users on 5/8. 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 6/211:22 pm
TYS
- MDW
Nonstop1h 34m
Allegiant Air
Deal found 5/8![Allegiant Air logo]()
$83
This Cheapflightsfares deal was found by Cheapflights users on 5/8. 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.
Thu 7/231:22 pm
TYS
- MDW
Nonstop1h 36m
Allegiant Air
Deal found 5/8![Allegiant Air logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/311:22 pm
TYS
- MDW
Nonstop1h 35m
Allegiant Air
Deal found 5/9![Allegiant Air logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/11:36 pm
TYS
- ORD
1 stop23h 48m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 6/1512:40 pm
TYS
- STL
2 stops29h 50m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 6/812:40 pm
TYS
- ORD
2 stops20h 23m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 7/1012:40 pm
TYS
- STL
2 stops21h 17m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/112:55 pm
TYS
- MDW
2 stops34h 07m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 6/2912:49 pm
TYS
- ORD
2 stops20h 14m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/312:40 pm
TYS
- ORD
2 stops20h 23m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$113
Find flight deals from Knoxville to Illinois
Keep the following information in mind while searching for Knoxville to Illinois flight deals. Data was last updated May 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $93 (Cheapflightsfares) |
One-way from | $45 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $249 |
Good round-trip deal | $113 or less |
Good one-way deal | $80 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 May 13, 2026.
Use the filters below to find and compare flights from Knoxville to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Fri 8/14
6:02 pm-7:00 pm
Nonstop1h 58m
Chicago O'Hare Intl
Mon 8/17
2:10 pm-4:58 pm
Nonstop1h 48m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Fri 6/19
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Sun 6/28
7:45 pm-10:34 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Sat 6/13
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Tue 6/16
6:07 pm-8:56 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Wed 6/10
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Sat 6/13
6:07 pm-8:56 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Thu 6/25
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Sun 6/28
7:45 pm-10:34 pm
Nonstop1h 49m
$249
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Fri 6/19
6:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Mon 6/22
6:07 pm-8:56 pm
Nonstop1h 49m
$260
KnoxvilleChicago
TYS - ORD
TYSORD
Knoxville McGhee Tyson
Sat 5/23
6:30 am-7:29 am
Nonstop1h 59m
Chicago O'Hare Intl
Sat 5/30
2:02 pm-4:51 pm
Nonstop1h 49m
$264
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Tue 6/9
5:40 pm-11:55 pm
1 stop7h 15m
Lambert-St Louis
Tue 6/16
8:25 am-6:20 pm
1 stop8h 55m
$269
KnoxvilleChicago
TYS - MDW
TYSMDW
Knoxville McGhee Tyson
Wed 7/15
7:15 am-12:38 pm
1 stop6h 23m
Chicago Midway
Wed 7/22
11:05 am-5:16 pm
1 stop5h 11m
$269
KnoxvilleSt. Louis
TYS - STL
TYSSTL
Knoxville McGhee Tyson
Tue 7/28
5:40 pm-11:55 pm
1 stop7h 15m
Lambert-St Louis
Wed 7/29
10:20 am-5:00 pm
1 stop5h 40m
$269
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-PIA
TYS-STL
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-PIA
TYS-STL
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 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 May 13, 2026.
It’s typically best to fly out from Knoxville to Illinois in the morning. Doing so could potentially save you 22% 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. Sunday mornings 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 May 13, 2026.
The most flights from TYS to USIL are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).
How much does it cost to fly round-trip from Knoxville to Illinois?
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 May 13, 2026.
Read through reviews of airlines operating flights from Knoxville to Illinois, such as United Airlines,Allegiant Air, andAmerican Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.1
Food
6.6
Crew
8.1
Comfort
7.3
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Food
6.6
Crew
8.1
Comfort
7.3
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Food
6.6
Crew
8.1
Comfort
7.3
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Entertainment
7.1
Food
6.6
Crew
8.1
Comfort
7.3
Boarding
7.7
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 May 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 May 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$60 | Average$103 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$189 | Average$344 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$307 | FlexibilityNo cancel fee | On-time71% |