$99+ Cheap flights from Louisville (SDF) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Oct 18 — Oct 251
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Louisville to Illinois 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 Louisville to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Louisville to IllinoisExplore the most affordable flight options available from Louisville to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
Explore the most affordable flight options available from Louisville to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 18, 2026.
This American Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” 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 10/2810:16 am -
Nonstop1h 44m
Sat 11/216:54 am -
Nonstop1h 34m
Deal found 9/18![American Airlines logo]()
$197
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/207:00 am -
Nonstop1h 40m
Tue 10/274:00 pm -
Nonstop1h 32m
Deal found 9/17![United Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:35 am -
Nonstop1h 15m
Wed 10/216:00 pm -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$207
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/157:50 pm -
Nonstop1h 15m
Tue 10/202:10 pm -
1 stop5h 25m
Deal found 9/17![Southwest logo]()
$212
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 11/64:40 pm -
Nonstop1h 20m
Mon 11/97:45 am -
Nonstop1h 20m
Deal found 9/17![Southwest logo]()
$214
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/297:06 pm -
1 stop5h 53m
Thu 1/77:10 am -
1 stop5h 39m
Deal found 9/17![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:35 pm -
Nonstop1h 15m
Tue 11/36:15 pm -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$220
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:19 pm -
Nonstop1h 55m
Thu 10/221:50 pm -
Nonstop1h 33m
Deal found 9/16![American Airlines logo]()
$221
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:05 pm -
Nonstop1h 15m
Thu 10/227:55 am -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$221
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:57 pm -
1 stop7h 00m
Wed 10/711:19 am -
1 stop4h 59m
Deal found 9/16![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:55 am -
1 stop5h 52m
Wed 10/79:29 am -
1 stop3h 24m
Deal found 9/16![Delta logo]()
$227
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:02 am -
1 stop6h 42m
Tue 11/242:45 pm -
Nonstop1h 31m
Deal found 9/16![American Airlines logo]()
$234
Best flights from Louisville to IllinoisDiscover carefully curated flight deals from Louisville to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
Discover carefully curated flight deals from Louisville to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 18, 2026.
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 12/2910:17 am -
Nonstop1h 49m
Thu 1/73:40 pm -
Nonstop1h 37m
Deal found 9/17![United Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:35 pm -
Nonstop1h 15m
Tue 11/36:15 pm -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$220
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 11/125:59 pm -
1 stop5h 55m
Sat 11/1411:27 am -
1 stop4h 27m
Deal found 9/17![Delta logo]()
$291
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:35 pm -
1 stop4h 22m
Fri 11/67:26 am -
1 stop4h 17m
Deal found 9/15![American Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:35 pm -
1 stop6h 10m
Mon 10/127:55 am -
Nonstop1h 15m
Deal found 9/16![Southwest logo]()
$231
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:04 am -
Nonstop1h 41m
Thu 10/156:55 am -
Nonstop1h 39m
Deal found 9/16![United Airlines logo]()
$235
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:55 pm -
1 stop4h 30m
Wed 10/217:55 am -
2 stops7h 35m
Deal found 9/14![Southwest logo]()
$232
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:00 am -
Nonstop1h 40m
Tue 10/134:30 pm -
Nonstop1h 41m
Deal found 9/15![United Airlines logo]()
$236
This Delta deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” 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 10/285:57 pm -
1 stop5h 36m
Sat 11/219:30 am -
1 stop6h 22m
Deal found 9/18![Delta logo]()
$301
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/49:00 am -
Nonstop1h 45m
Mon 12/79:25 pm -
Nonstop1h 29m
Deal found 9/14![United Airlines logo]()
$250
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:50 pm -
Nonstop1h 15m
Tue 10/139:40 am -
2 stops9h 55m
Deal found 9/15![Southwest logo]()
$251
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:55 pm -
1 stop5h 02m
Thu 10/221:55 pm -
1 stop6h 18m
Deal found 9/17![Delta logo]()
$305
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:25 am -
Nonstop1h 40m
Thu 10/226:55 am -
Nonstop1h 39m
Deal found 9/17![United Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:55 pm -
1 stop5h 35m
Thu 11/55:45 am -
1 stop3h 20m
Deal found 9/14![Southwest logo]()
$269
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:29 am -
1 stop5h 22m
Sun 10/256:00 am -
1 stop5h 10m
Deal found 9/15![American Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/55:57 pm -
Nonstop1h 57m
Sat 1/93:40 pm -
Nonstop1h 37m
Deal found 9/15![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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.
Sun 11/16:00 am -
1 stop5h 47m
Mon 11/26:04 am -
1 stop5h 50m
Deal found 9/17![Delta logo]()
$338
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:35 pm -
Nonstop1h 15m
Mon 12/71:15 pm -
2 stops7h 55m
Deal found 9/13![Southwest logo]()
$280
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop7h 13m
Tue 11/36:20 am -
1 stop4h 37m
Deal found 9/14![Delta logo]()
$365
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:50 pm -
1 stop4h 30m
Fri 11/64:40 pm -
2 stops6h 45m
Deal found 9/15![Southwest logo]()
$306
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/38:55 am -
1 stop6h 33m
Thu 2/47:30 am -
1 stop4h 50m
Deal found 9/15![United Airlines logo]()
$324
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 9/294:48 pm -
2 stops8h 17m
Sat 10/36:00 am -
1 stop6h 43m
Deal found 9/14![American Airlines logo]()
$488
This Southwest deal was found by Cheapflights users on 9/13. 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.
Tue 10/133:55 pm -
2 stops7h 10m
Tue 10/2012:25 pm -
2 stops7h 10m
Deal found 9/13![Southwest logo]()
$322
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:12 pm -
1 stop5h 29m
Mon 10/126:55 am -
Nonstop1h 39m
Deal found 9/16![United Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am -
1 stop5h 18m
Sun 10/255:04 pm -
1 stop4h 33m
Deal found 9/16![Delta logo]()
$442
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:50 pm -
Nonstop1h 15m
Sun 11/112:55 pm -
2 stops10h 25m
Deal found 9/16![Southwest logo]()
$336
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:10 am -
Nonstop1h 45m
Tue 11/37:55 pm -
Nonstop1h 35m
Deal found 9/14![United Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:10 pm -
1 stop5h 50m
Sun 11/112:55 pm -
2 stops10h 25m
Deal found 9/16![Southwest logo]()
$346
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 12/256:00 pm -
1 stop6h 38m
Mon 12/285:08 pm -
1 stop4h 31m
Deal found 9/17![United Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 am -
1 stop6h 37m
Sat 10/36:32 am -
1 stop5h 43m
Deal found 9/14![United Airlines logo]()
$369
Last-minute flights from Louisville to IllinoisDiscover last-minute flight deals from Louisville to Illinois. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Illinois. Data last updated September 18, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:57 pm -
1 stop7h 00m
Wed 10/711:19 am -
1 stop4h 59m
Deal found 9/16![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:55 am -
1 stop5h 52m
Wed 10/79:29 am -
1 stop3h 24m
Deal found 9/16![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:00 am -
Nonstop1h 40m
Tue 10/134:30 pm -
Nonstop1h 41m
Deal found 9/15![United Airlines logo]()
$236
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/105:05 pm -
Nonstop1h 20m
Mon 10/127:55 am -
Nonstop1h 15m
Deal found 9/17![Southwest logo]()
$235
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:35 am -
Nonstop1h 15m
Wed 10/216:00 pm -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$207
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/157:50 pm -
Nonstop1h 15m
Tue 10/202:10 pm -
1 stop5h 25m
Deal found 9/17![Southwest logo]()
$212
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:15 am -
Nonstop1h 41m
Wed 10/216:55 am -
Nonstop1h 39m
Deal found 9/17![United Airlines logo]()
$235
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/207:00 am -
Nonstop1h 40m
Tue 10/274:00 pm -
Nonstop1h 32m
Deal found 9/17![United Airlines logo]()
$207
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:19 pm -
Nonstop1h 55m
Thu 10/221:50 pm -
Nonstop1h 33m
Deal found 9/16![American Airlines logo]()
$221
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:05 pm -
Nonstop1h 15m
Thu 10/227:55 am -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$221
This American Airlines deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” 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 10/2810:16 am -
Nonstop1h 44m
Sat 11/216:54 am -
Nonstop1h 34m
Deal found 9/18![American Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3112:35 pm -
Nonstop1h 15m
Tue 11/36:15 pm -
Nonstop1h 15m
Deal found 9/14![Southwest logo]()
$220
One-way flights from Louisville to IllinoisSearch for one-way flight options from Louisville to Illinois. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
Search for one-way flight options from Louisville to Illinois. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/106:16 pm -
Nonstop1h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![United Airlines logo]()
$99
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/105:05 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Southwest logo]()
$99
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:25 am -
Nonstop1h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$104
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:05 pm -
Nonstop1h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$104
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/107:55 am -
1 stop6h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/105:59 pm -
1 stop5h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/151:04 pm -
1 stop7h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$114
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am -
1 stop5h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$114
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/186:36 pm -
Nonstop1h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![American Airlines logo]()
$118
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:50 pm -
Nonstop1h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$118
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 11/177:20 am -
2 stops9h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Southwest logo]()
$120
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:57 pm -
1 stop6h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$120
Find flight deals from Louisville to Illinois
Keep the following information in mind while searching for Louisville to Illinois flight deals. Data was last updated September 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $207 (United Airlines) |
One-way from | $99 (Southwest) |
Popular in | January |
Cheapest in | December |
Average price | $403 |
Good round-trip deal | $339 or less |
Good one-way deal | $190 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Louisville 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 7,457,451 searches. Data last updated September 18, 2026.
Use the filters below to find and compare flights from Louisville to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LouisvilleChicago
SDF Louisville Intl - ORD Chicago O'Hare Intl
SDFORD
Louisville Intl
Tue 12/15
9:00 am-9:45 am
Nonstop1h 45m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$104
Quickest round-trip
LouisvilleChicago
SDF Louisville Intl - MDW Chicago Midway
SDFMDW
Louisville Intl
Sat 11/14
9:10 am-9:25 am
Nonstop1h 15m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$104
LouisvilleChicago
SDF Louisville Intl - ORD Chicago O'Hare Intl
SDFORD
Louisville Intl
Tue 11/17
6:00 am-12:20 pm
1 stop7h 20m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$114
LouisvilleChicago
SDF Louisville Intl - ORD Chicago O'Hare Intl
SDFORD
Louisville Intl
Sat 11/14
10:49 am-1:59 pm
1 stop4h 10m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$114
LouisvilleSt. Louis
SDF Louisville Intl - STL Lambert-St Louis
SDFSTL
Louisville Intl
Tue 10/13
8:35 am-10:50 am
1 stop3h 15m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$120
LouisvilleSt. Louis
SDF Louisville Intl - STL Lambert-St Louis
SDFSTL
Louisville Intl
Tue 10/13
5:57 pm-11:54 pm
1 stop6h 57m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$120
LouisvilleChicago
SDF Louisville Intl - ORD Chicago O'Hare Intl
SDFORD
Louisville Intl
Mon 11/16
12:40 pm-7:39 pm
1 stop7h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$128
LouisvilleChicago
SDF Louisville Intl - MDW Chicago Midway
SDFMDW
Louisville Intl
Tue 10/6
7:10 pm-7:25 pm
Nonstop1h 15m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$132
LouisvilleChicago
SDF Louisville Intl - MDW Chicago Midway
SDFMDW
Louisville Intl
Fri 10/30
8:20 am-8:35 am
Nonstop1h 15m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$133
LouisvilleChicago
SDF Louisville Intl - MDW Chicago Midway
SDFMDW
Louisville Intl
Thu 11/5
4:40 pm-5:00 pm
Nonstop1h 20m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$133
Showing 1-10 of 59 resultsSorted by cheapest first
Best time to book a flight from Louisville to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Louisville with our price prediction graph.
SDF-ORD
SDF-MDW
SDF-STL
SDF-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 Louisville to Illinois
SDF-USIL
SDF-ORD
SDF-MDW
SDF-STL
SDF-MLI
What is the cheapest month to book a flight from Louisville to Illinois?
Currently, November is the cheapest month in which you can book a flight from Louisville to Illinois (average of $236). Flying from Louisville to Illinois in August is currently the most expensive (average of $391). 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 SDF to IL?
Find hourly flight availability from Louisville 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 September 18, 2026.
When flying from Louisville to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 32% versus a flight at noon.
Weekly flight availability from Louisville to Illinois
Explore weekly flight availability from Louisville 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 September 18, 2026.
The most flights from SDF to USIL are scheduled on a Wednesday (49 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 Louisville to Illinois?
Airfare is below average for this route at the moment.
Louisville to Illinois flights typically cost between $290 and $469 in October.The cheapest round-trip price found within the last 5 days was $207 on United Airlines (Oct 20-Oct 27).
How far ahead should I book a flight from Louisville to Illinois?
The price you pay for your flight from Louisville to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 52 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 Louisville to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Louisville to Illinois. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Louisville to Illinois flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday at noon 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 September 18, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines from Louisville to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Louisville to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Louisville to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Louisville to Illinois by cabin class
Find flights from Louisville to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Louisville and Illinois flights
Browse other Louisville and Illinois flight options. Last updated on September 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Louisville to Illinois flights
Consider these flights traveling from Louisville to Illinois.
Top 3 airlines flying from Louisville to Illinois
Discover the top 3 airlines that operate flights from Louisville 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 7,457,451 searches. Data last updated September 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$157 | Average$382 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$171 | Average$296 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$184 | Average$315 | FlexibilityNo cancel fee | On-time63% |