$53+ Cheap flights from Illinois to Knoxville (TYS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TYS
Sep 13 — Sep 201
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Knoxville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Knoxville
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Cheapest flights from Illinois to KnoxvilleExplore the most affordable flight options available from Illinois to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
Explore the most affordable flight options available from Illinois to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:30 pm -
Nonstop1h 25m
Mon 10/1912:04 pm -
Nonstop1h 32m
Deal found 8/12![Allegiant Air logo]()
$186
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:40 am -
1 stop3h 25m
Tue 9/1512:45 pm -
1 stop7h 30m
Deal found 8/9![Southwest logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:24 pm -
Nonstop1h 25m
Mon 10/511:34 am -
Nonstop1h 32m
Deal found 8/10![Allegiant Air logo]()
$196
This Cheapflightsfares deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/132:49 pm -
Nonstop1h 30m
Sun 8/161:23 pm -
Nonstop1h 36m
Deal found 8/9![Allegiant Air logo]()
$197
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:40 am -
2 stops9h 55m
Tue 10/201:00 pm -
2 stops7h 40m
Deal found 8/13![Southwest logo]()
$198
This Southwest deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2711:10 am -
2 stops8h 50m
Fri 10/301:50 pm -
1 stop8h 35m
Deal found 8/12![Southwest logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/191:26 pm -
Nonstop1h 25m
Sun 10/256:00 am -
2 stops29h 58m
Deal found 8/11![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:11 am -
1 stop24h 24m
Mon 10/59:28 pm -
1 stop26h 31m
Deal found 8/12![Multiple Airlines logo]()
$204
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:10 am -
2 stops10h 25m
Sat 10/102:55 pm -
1 stop7h 45m
Deal found 8/11![Southwest logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:03 pm -
2 stops22h 26m
Fri 10/231:04 pm -
Nonstop1h 32m
Deal found 8/11![Multiple Airlines logo]()
$205
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:00 am -
1 stop6h 30m
Wed 9/168:15 pm -
1 stop5h 12m
Deal found 8/11![American Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:11 am -
1 stop25h 53m
Mon 9/285:40 pm -
1 stop22h 40m
Deal found 8/11![Multiple Airlines logo]()
$206
Best flights from Illinois to KnoxvilleDiscover carefully curated flight deals from Illinois to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
Discover carefully curated flight deals from Illinois to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:40 am -
2 stops9h 55m
Tue 10/201:00 pm -
2 stops7h 40m
Deal found 8/13![Southwest logo]()
$198
This United Airlines deal was found by Cheapflights users on 8/13. 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 9/32:10 pm -
Nonstop1h 48m
Mon 9/77:00 am -
Nonstop1h 56m
Deal found 8/13![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:30 pm -
1 stop3h 56m
Sun 11/157:06 am -
1 stop4h 39m
Deal found 8/10![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:00 am -
1 stop5h 05m
Thu 10/296:55 pm -
1 stop6h 04m
Deal found 8/10![American Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:05 am -
1 stop6h 15m
Tue 10/64:20 pm -
1 stop7h 50m
Deal found 8/10![Southwest logo]()
$206
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:45 am -
2 stops8h 05m
Sat 9/51:55 pm -
1 stop8h 45m
Deal found 8/11![Southwest logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:23 am -
1 stop6h 58m
Wed 10/1410:55 am -
1 stop6h 23m
Deal found 8/10![Allegiant Air logo]()
$511
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:10 pm -
Nonstop1h 48m
Mon 9/286:00 am -
Nonstop1h 56m
Deal found 8/11![United Airlines logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:08 pm -
1 stop26h 16m
Sat 10/108:10 am -
2 stops12h 43m
Deal found 8/10![Multiple Airlines logo]()
$531
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:00 am -
1 stop3h 20m
Mon 10/57:25 pm -
2 stops6h 40m
Deal found 8/13![Southwest logo]()
$221
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:22 am -
1 stop7h 04m
Mon 9/77:15 am -
1 stop6h 53m
Deal found 8/13![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/65:00 am -
1 stop5h 05m
Sun 1/107:13 pm -
1 stop5h 46m
Deal found 8/14![American Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:10 pm -
Nonstop1h 48m
Sun 8/307:00 am -
Nonstop1h 56m
Deal found 8/9![United Airlines logo]()
$274
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:23 pm -
1 stop4h 19m
Sun 11/87:25 pm -
1 stop5h 27m
Deal found 8/9![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:40 pm -
1 stop5h 15m
Wed 9/167:00 am -
2 stops8h 50m
Deal found 8/11![Southwest logo]()
$233
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:00 am -
1 stop5h 30m
Sat 9/198:18 am -
2 stops9h 40m
Deal found 8/10![American Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:40 pm -
1 stop5h 42m
Thu 10/297:26 am -
1 stop4h 04m
Deal found 8/9![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/283:11 pm -
1 stop4h 38m
Thu 10/16:00 am -
1 stop7h 13m
Deal found 8/12![United Airlines logo]()
$283
This Delta deal was found by Cheapflights users on 8/13. 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.
Fri 9/49:54 am -
1 stop6h 25m
Mon 9/77:15 am -
1 stop4h 27m
Deal found 8/13![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:35 pm -
2 stops5h 30m
Sat 10/172:55 pm -
1 stop7h 45m
Deal found 8/11![Southwest logo]()
$259
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:06 pm -
Nonstop1h 47m
Sun 8/306:02 pm -
Nonstop1h 58m
Deal found 8/11![United Airlines logo]()
$289
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:00 am -
2 stops10h 36m
Mon 9/148:15 pm -
1 stop4h 50m
Deal found 8/9![American Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:04 am -
1 stop3h 50m
Mon 10/266:23 pm -
1 stop5h 10m
Deal found 8/12![Delta logo]()
$279
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:30 am -
1 stop6h 05m
Wed 10/211:00 pm -
2 stops7h 40m
Deal found 8/13![Southwest logo]()
$264
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:45 am -
1 stop6h 33m
Sun 9/136:00 am -
1 stop4h 57m
Deal found 8/9![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:05 pm -
1 stop5h 53m
Mon 8/316:52 pm -
1 stop6h 16m
Deal found 8/12![American Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 8/14. 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.
Wed 9/25:30 am -
1 stop4h 41m
Sun 9/69:33 am -
1 stop4h 07m
Deal found 8/14![Delta logo]()
$294
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:06 pm -
Nonstop1h 47m
Mon 9/77:00 am -
Nonstop1h 56m
Deal found 8/12![United Airlines logo]()
$303
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/129:00 am -
2 stops7h 45m
Wed 9/167:00 am -
2 stops8h 50m
Deal found 8/10![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:26 pm -
1 stop4h 56m
Sat 10/175:40 am -
1 stop6h 46m
Deal found 8/12![Delta logo]()
$299
Last-minute flights from Illinois to KnoxvilleDiscover last-minute flight deals from Illinois to Knoxville. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Knoxville. Data last updated August 14, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/132:49 pm -
Nonstop1h 30m
Sun 8/161:23 pm -
Nonstop1h 36m
Deal found 8/9![Allegiant Air logo]()
$197
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:40 pm -
1 stop5h 10m
Sat 9/51:55 pm -
1 stop8h 45m
Deal found 8/11![Southwest logo]()
$215
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:25 am -
1 stop4h 53m
Sun 9/67:00 am -
1 stop6h 02m
Deal found 8/12![United Airlines logo]()
$208
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
1 stop3h 55m
Sat 9/124:55 pm -
1 stop3h 25m
Deal found 8/11![Southwest logo]()
$215
This Southwest deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:40 am -
1 stop3h 25m
Tue 9/1512:45 pm -
1 stop7h 30m
Deal found 8/9![Southwest logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:25 am -
1 stop10h 09m
Mon 9/145:40 pm -
1 stop22h 40m
Deal found 8/12![Multiple Airlines logo]()
$209
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:00 am -
1 stop6h 30m
Wed 9/168:15 pm -
1 stop5h 12m
Deal found 8/11![American Airlines logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:11 am -
1 stop25h 53m
Wed 9/238:30 am -
1 stop15h 29m
Deal found 8/11![Multiple Airlines logo]()
$210
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:50 am -
1 stop5h 25m
Wed 9/167:00 am -
2 stops8h 50m
Deal found 8/10![Southwest logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:11 am -
1 stop8h 20m
Tue 9/2210:29 am -
1 stop13h 30m
Deal found 8/12![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:11 am -
1 stop25h 53m
Mon 9/285:40 pm -
1 stop22h 40m
Deal found 8/11![Multiple Airlines logo]()
$206
This Southwest deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:05 am -
1 stop6h 15m
Tue 10/64:20 pm -
1 stop7h 50m
Deal found 8/10![Southwest logo]()
$206
One-way flights from Illinois to KnoxvilleSearch for one-way flight options from Illinois to Knoxville. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
Search for one-way flight options from Illinois to Knoxville. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:31 pm -
Nonstop1h 30m
Deal found 8/9![Allegiant Air logo]()
$53
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:56 pm -
Nonstop1h 25m
Deal found 8/13![Allegiant Air logo]()
$90
This Cheapflightsfares deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:24 pm -
Nonstop1h 25m
Deal found 8/9![Allegiant Air logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/107:11 am -
1 stop25h 53m
Deal found 8/13![Multiple Airlines logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Mon 9/147:25 am -
1 stop11h 09m
Deal found 8/13![Multiple Airlines logo]()
$94
This Southwest deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:40 am -
1 stop3h 25m
Deal found 8/11![Southwest logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:35 am -
2 stops10h 30m
Deal found 8/10![Multiple Airlines logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:11 am -
1 stop25h 53m
Deal found 8/11![Multiple Airlines logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:11 am -
1 stop24h 24m
Deal found 8/10![Multiple Airlines logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Sat 11/1411:06 am -
1 stop25h 13m
Deal found 8/13![Multiple Airlines logo]()
$98
This Super.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/162:49 pm -
Nonstop1h 30m
Deal found 8/10![Allegiant Air logo]()
$98
This Southwest deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:15 pm -
2 stops7h 25m
Deal found 8/13![Southwest logo]()
$99
Find flight deals from Illinois to Knoxville
Keep the following information in mind while searching for Illinois to Knoxville flight deals. Data was last updated August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $186 (Cheapflightsfares) |
One-way from | $53 (Kiwi.com) |
Popular in | March |
Cheapest in | June |
Average price | $284 |
Good round-trip deal | $97 or less |
Good one-way deal | $103 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Knoxville that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2026.
Use the filters below to find and compare flights from Illinois to Knoxville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoKnoxville
MDW Chicago Midway - TYS Knoxville McGhee Tyson
MDWTYS
Chicago Midway
Sat 10/17
8:40 am-7:35 pm
2 stops9h 55m
Knoxville McGhee Tyson
Tue 10/20
1:00 pm-7:40 pm
2 stops7h 40m
$198
St. LouisKnoxville
STL Lambert-St Louis - TYS Knoxville McGhee Tyson
STLTYS
Lambert-St Louis
Tue 9/29
7:05 am-2:20 pm
1 stop6h 15m
Knoxville McGhee Tyson
Tue 10/6
4:20 pm-11:10 pm
1 stop7h 50m
$206
St. LouisKnoxville
STL Lambert-St Louis - TYS Knoxville McGhee Tyson
STLTYS
Lambert-St Louis
Tue 9/1
10:45 am-7:50 pm
2 stops8h 05m
Knoxville McGhee Tyson
Sat 9/5
1:55 pm-9:40 pm
1 stop8h 45m
$220
ChicagoKnoxville
MDW Chicago Midway - TYS Knoxville McGhee Tyson
MDWTYS
Chicago Midway
Mon 9/28
8:00 am-12:20 pm
1 stop3h 20m
Knoxville McGhee Tyson
Mon 10/5
7:25 pm-1:05 am
2 stops6h 40m
$221
St. LouisKnoxville
STL Lambert-St Louis - TYS Knoxville McGhee Tyson
STLTYS
Lambert-St Louis
Wed 9/9
1:40 pm-7:55 pm
1 stop5h 15m
Knoxville McGhee Tyson
Wed 9/16
7:00 am-2:50 pm
2 stops8h 50m
$233
ChicagoKnoxville
ORD Chicago O'Hare Intl - TYS Knoxville McGhee Tyson
ORDTYS
Chicago O'Hare Intl
Thu 9/3
2:10 pm-4:58 pm
Nonstop1h 48m
Knoxville McGhee Tyson
Mon 9/7
7:00 am-7:56 am
Nonstop1h 56m
$259
ChicagoKnoxville
ORD Chicago O'Hare Intl - TYS Knoxville McGhee Tyson
ORDTYS
Chicago O'Hare Intl
Wed 9/23
2:10 pm-4:58 pm
Nonstop1h 48m
Knoxville McGhee Tyson
Mon 9/28
6:00 am-6:56 am
Nonstop1h 56m
$259
ChicagoKnoxville
MDW Chicago Midway - TYS Knoxville McGhee Tyson
MDWTYS
Chicago Midway
Wed 10/14
1:35 pm-8:05 pm
2 stops5h 30m
Knoxville McGhee Tyson
Sat 10/17
2:55 pm-9:40 pm
1 stop7h 45m
$259
ChicagoKnoxville
MDW Chicago Midway - TYS Knoxville McGhee Tyson
MDWTYS
Chicago Midway
Sun 10/18
8:30 am-3:35 pm
1 stop6h 05m
Knoxville McGhee Tyson
Wed 10/21
1:00 pm-7:40 pm
2 stops7h 40m
$264
ChicagoKnoxville
ORD Chicago O'Hare Intl - TYS Knoxville McGhee Tyson
ORDTYS
Chicago O'Hare Intl
Thu 8/27
2:10 pm-4:58 pm
Nonstop1h 48m
Knoxville McGhee Tyson
Sun 8/30
7:00 am-7:56 am
Nonstop1h 56m
$274
Showing 1-10 of 59 resultsSorted by cheapest first
Best time to book a flight from Illinois to Knoxville
Have a flexible travel schedule? Discover the best time to fly to Knoxville from Illinois with our price prediction graph.
MDW-TYS
ORD-TYS
BMI-TYS
STL-TYS
SPI-TYS
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 Illinois to Knoxville
USIL-TYS
MDW-TYS
ORD-TYS
BMI-TYS
STL-TYS
What is the cheapest month to book a flight from Illinois to Knoxville?
Currently, June is the cheapest month in which you can book a flight from Illinois to Knoxville (average of $261). Flying from Illinois to Knoxville in May is currently the most expensive (average of $342). 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 IL to TYS?
Find hourly flight availability from Illinois to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2026.
When flying from Illinois to Knoxville, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 26% versus a flight at noon.
Weekly flight availability from Illinois to Knoxville
Explore weekly flight availability from Illinois to Knoxville. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 14, 2026.
The most flights from USIL to TYS are scheduled on a Wednesday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
How much does it cost to fly round-trip from Illinois to Knoxville?
Airfare is below average for this route at the moment.
Illinois to Knoxville flights typically cost between $249 and $378 in October.The cheapest round-trip price found within the last 5 days was $204 on Multiple Airlines (Oct 2-Oct 5).
How far ahead should I book a flight from Illinois to Knoxville?
The price you pay for your flight from Illinois to Knoxville may vary depending on when you book. For the best chance of a lower fare, look to book 78 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Illinois to Knoxville?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Knoxville. Price data was last updated on October 19, 2025.
Travelers seeking maximum savings on their Illinois to Knoxville flight should consider departing on Tuesday at noon 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.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Knoxville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Knoxville?
Book flights to Knoxville if you plan to visit one of these locationsCherokee
Crossville
Morristown
Bryson City
Murphy
Alcoa
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois to Knoxville
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Complete your trip
Complete your trip to Knoxville by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Knoxville by cabin class
Find flights from Illinois to Knoxville, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Knoxville
Explore flights to Knoxville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Illinois and Knoxville flights
Browse other Illinois and Knoxville flight options. Last updated on August 14, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Illinois to Knoxville flights
Consider these flights traveling from Illinois to Knoxville.
Top 3 airlines flying from Illinois to Knoxville
Discover the top 3 airlines that operate flights from Illinois to Knoxville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$82 | Average$155 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$188 | Average$403 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$189 | Average$374 | FlexibilityNo cancel fee | On-time69% |