$96+ Cheap flights from Louisville (SDF) 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ORD
Apr 17 — Apr 241
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 March 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 March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:48 pm
SDF
- ORD
1 stop14h 48m
Multiple Airlines
Thu 4/307:15 pm
ORD
- SDF
1 stop22h 43m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:48 pm
SDF
- ORD
1 stop14h 48m
Multiple Airlines
Mon 4/205:05 am
ORD
- SDF
1 stop10h 59m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$234
This American Airlines deal was found by Cheapflights users on 3/15. 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.
Sat 5/167:01 pm
SDF
- ORD
Nonstop1h 48m
American Airlines
Sat 5/169:01 pm
ORD
- SDF
1 stop11h 37m
American Airlines
Deal found 3/15![American Airlines logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:48 pm
SDF
- ORD
2 stops22h 12m
Multiple Airlines
Mon 4/205:05 am
ORD
- SDF
1 stop10h 59m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Fri 5/156:06 pm
SDF
- ORD
1 stop16h 25m
Multiple Airlines
Sun 5/177:45 pm
ORD
- SDF
1 stop22h 13m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/277:48 pm
SDF
- ORD
1 stop14h 48m
Multiple Airlines
Mon 5/44:28 pm
ORD
- SDF
2 stops39h 08m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/162:26 pm
SDF
- ORD
2 stops20h 57m
Multiple Airlines
Sun 4/192:10 pm
ORD
- SDF
1 stop25h 54m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$255
This Mytrip deal was found by Cheapflights users on 3/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:06 pm
SDF
- ORD
1 stop7h 18m
Spirit Airlines
Mon 4/205:05 am
ORD
- SDF
1 stop10h 59m
Spirit Airlines
Deal found 3/13![Spirit Airlines logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:06 pm
SDF
- ORD
1 stop16h 30m
Multiple Airlines
Tue 5/51:59 pm
ORD
- SDF
2 stops17h 37m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:06 pm
SDF
- ORD
1 stop16h 30m
Multiple Airlines
Fri 5/87:45 pm
ORD
- SDF
2 stops45h 30m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 3/16. 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.
Mon 4/132:40 pm
SDF
- MDW
Nonstop1h 15m
Southwest
Tue 4/146:20 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/16![Southwest logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:48 pm
SDF
- MDW
2 stops16h 24m
Multiple Airlines
Thu 5/219:14 am
MDW
- SDF
1 stop22h 14m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$269
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 March 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 March 18, 2026.
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Wed 5/62:55 pm
SDF
- ORD
Nonstop1h 40m
United Airlines
Mon 5/187:53 pm
ORD
- SDF
Nonstop1h 37m
United Airlines
Deal found 3/17![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 3/17. 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.
Wed 5/67:15 pm
SDF
- MDW
Nonstop1h 15m
Southwest
Mon 5/1812:45 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/17![Southwest logo]()
$267
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/137:01 pm
SDF
- STL
1 stop5h 45m
American Airlines
Wed 4/156:55 pm
STL
- SDF
1 stop4h 30m
American Airlines
Deal found 3/16![American Airlines logo]()
$293
This Delta deal was found by Cheapflights users on 3/17. 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 4/307:56 am
SDF
- STL
1 stop6h 09m
Delta
Sat 5/210:50 am
STL
- SDF
1 stop5h 32m
Delta
Deal found 3/17![Delta logo]()
$293
This Southwest deal was found by Cheapflights users on 3/15. 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.
Tue 5/128:55 am
SDF
- MDW
Nonstop1h 20m
Southwest
Wed 5/136:20 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/15![Southwest logo]()
$271
This Southwest deal was found by Cheapflights users on 3/16. 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 4/157:15 pm
SDF
- MDW
Nonstop1h 15m
Southwest
Wed 4/226:20 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/16![Southwest logo]()
$271
This Delta deal was found by Cheapflights users on 3/17. 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 4/186:04 am
SDF
- ORD
2 stops7h 45m
Delta
Mon 4/205:04 pm
ORD
- SDF
1 stop3h 16m
Delta
Deal found 3/17![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 3/13. 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 5/285:20 am
SDF
- STL
1 stop4h 21m
United Airlines
Mon 6/15:41 pm
STL
- SDF
1 stop3h 49m
United Airlines
Deal found 3/13![United Airlines logo]()
$311
This American Airlines deal was found by Cheapflights users on 3/16. 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 3/3110:31 am
SDF
- MLI
2 stops9h 04m
American Airlines
Sat 4/46:00 am
MLI
- SDF
2 stops8h 03m
American Airlines
Deal found 3/16![American Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 3/16. 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 4/188:40 am
SDF
- MDW
Nonstop1h 20m
Southwest
Mon 4/206:45 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/16![Southwest logo]()
$274
This United Airlines deal was found by Cheapflights users on 3/14. 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 6/210:02 am
SDF
- ORD
Nonstop1h 36m
United Airlines
Sun 7/55:50 pm
ORD
- SDF
Nonstop1h 33m
United Airlines
Deal found 3/14![United Airlines logo]()
$315
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/107:37 pm
SDF
- ORD
1 stop5h 17m
Delta
Mon 4/131:36 pm
ORD
- SDF
1 stop6h 44m
Delta
Deal found 3/15![Delta logo]()
$317
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:00 am
SDF
- STL
1 stop4h 33m
American Airlines
Mon 6/16:12 pm
STL
- SDF
1 stop5h 16m
American Airlines
Deal found 3/13![American Airlines logo]()
$336
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:50 am
SDF
- ORD
1 stop6h 11m
Delta
Tue 5/269:10 am
ORD
- SDF
2 stops9h 40m
Delta
Deal found 3/13![Delta logo]()
$318
This United Airlines deal was found by Cheapflights users on 3/16. 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.
Tue 3/315:43 pm
SDF
- MLI
1 stop4h 23m
United Airlines
Sat 4/41:55 pm
MLI
- SDF
1 stop5h 21m
United Airlines
Deal found 3/16![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 3/13. 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 4/66:15 pm
SDF
- MDW
1 stop6h 50m
Southwest
Wed 4/86:20 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/13![Southwest logo]()
$297
This Delta deal was found by Cheapflights users on 3/17. 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 4/187:59 am
SDF
- MDW
1 stop5h 44m
Delta
Sun 4/199:27 am
MDW
- SDF
1 stop4h 03m
Delta
Deal found 3/17![Delta logo]()
$323
This United Airlines deal was found by Cheapflights users on 3/16. 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 4/117:20 am
SDF
- ORD
Nonstop1h 40m
United Airlines
Wed 4/159:30 pm
ORD
- SDF
Nonstop1h 29m
United Airlines
Deal found 3/16![United Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 3/16. 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.
Mon 4/134:45 pm
SDF
- STL
2 stops7h 00m
Southwest
Wed 4/156:35 am
STL
- SDF
1 stop5h 05m
Southwest
Deal found 3/16![Southwest logo]()
$298
This Delta deal was found by Cheapflights users on 3/17. 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 4/187:59 am
SDF
- ORD
2 stops11h 12m
Delta
Sun 4/195:15 am
ORD
- SDF
1 stop5h 56m
Delta
Deal found 3/17![Delta logo]()
$328
This Southwest deal was found by Cheapflights users on 3/16. 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.
Mon 6/16:55 am
SDF
- ORD
1 stop6h 55m
Southwest
Wed 6/32:40 pm
ORD
- SDF
1 stop5h 25m
Southwest
Deal found 3/16![Southwest logo]()
$301
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/117:20 am
SDF
- STL
1 stop6h 02m
United Airlines
Wed 4/157:45 am
STL
- SDF
1 stop4h 32m
United Airlines
Deal found 3/17![United Airlines logo]()
$353
This Southwest deal was found by Cheapflights users on 3/16. 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.
Mon 6/14:45 pm
SDF
- MDW
1 stop6h 35m
Southwest
Wed 6/310:15 am
MDW
- SDF
2 stops9h 50m
Southwest
Deal found 3/16![Southwest logo]()
$301
This Delta deal was found by Cheapflights users on 3/14. 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.
Tue 6/211:12 am
SDF
- ORD
1 stop6h 43m
Delta
Sun 7/58:55 am
ORD
- SDF
1 stop3h 43m
Delta
Deal found 3/14![Delta logo]()
$335
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Sat 8/227:22 am
SDF
- MLI
1 stop3h 32m
United Airlines
Wed 8/262:29 pm
MLI
- SDF
1 stop5h 07m
United Airlines
Deal found 3/13![United Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 3/13. 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 4/276:55 am
SDF
- ORD
1 stop6h 55m
Southwest
Mon 5/42:40 pm
ORD
- SDF
1 stop6h 05m
Southwest
Deal found 3/13![Southwest logo]()
$312
This Southwest deal was found by Cheapflights users on 3/13. 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 5/288:40 am
SDF
- STL
1 stop5h 15m
Southwest
Mon 6/11:45 pm
STL
- SDF
2 stops7h 00m
Southwest
Deal found 3/13![Southwest logo]()
$316
This Southwest deal was found by Cheapflights users on 3/13. 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 6/12:40 pm
SDF
- STL
2 stops7h 15m
Southwest
Thu 6/44:25 pm
STL
- SDF
2 stops7h 00m
Southwest
Deal found 3/13![Southwest logo]()
$321
This Southwest deal was found by Cheapflights users on 3/14. 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 6/611:50 am
SDF
- MDW
Nonstop1h 10m
Southwest
Sat 6/135:15 am
MDW
- SDF
1 stop5h 55m
Southwest
Deal found 3/14![Southwest logo]()
$325
This Southwest deal was found by Cheapflights users on 3/17. 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 4/166:55 am
SDF
- STL
2 stops6h 55m
Southwest
Thu 4/235:00 am
STL
- SDF
2 stops9h 00m
Southwest
Deal found 3/17![Southwest logo]()
$331
Last-minute flights from Louisville to IllinoisDiscover last-minute flight deals from Louisville to Illinois. Data last updated March 18, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Illinois. Data last updated March 18, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:48 pm
SDF
- ORD
2 stops22h 12m
Multiple Airlines
Mon 4/205:05 am
ORD
- SDF
1 stop10h 59m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$245
This Southwest deal was found by Cheapflights users on 3/16. 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.
Mon 4/132:40 pm
SDF
- MDW
Nonstop1h 15m
Southwest
Tue 4/146:20 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/16![Southwest logo]()
$267
This American Airlines deal was found by Cheapflights users on 3/16. 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 4/157:01 pm
SDF
- ORD
Nonstop1h 48m
American Airlines
Wed 4/221:34 pm
ORD
- SDF
Nonstop1h 31m
American Airlines
Deal found 3/16![American Airlines logo]()
$271
This Southwest deal was found by Cheapflights users on 3/16. 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 4/157:15 pm
SDF
- MDW
Nonstop1h 15m
Southwest
Wed 4/226:20 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/16![Southwest logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/162:26 pm
SDF
- ORD
2 stops20h 57m
Multiple Airlines
Sun 4/192:10 pm
ORD
- SDF
1 stop25h 54m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:48 pm
SDF
- ORD
1 stop14h 48m
Multiple Airlines
Mon 4/205:05 am
ORD
- SDF
1 stop10h 59m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$234
This Mytrip deal was found by Cheapflights users on 3/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:06 pm
SDF
- ORD
1 stop7h 18m
Spirit Airlines
Mon 4/205:05 am
ORD
- SDF
1 stop10h 59m
Spirit Airlines
Deal found 3/13![Spirit Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 3/16. 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 4/188:40 am
SDF
- MDW
Nonstop1h 20m
Southwest
Mon 4/206:45 pm
MDW
- SDF
Nonstop1h 15m
Southwest
Deal found 3/16![Southwest logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:48 pm
SDF
- ORD
1 stop14h 48m
Multiple Airlines
Thu 4/307:15 pm
ORD
- SDF
1 stop22h 43m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/277:48 pm
SDF
- ORD
1 stop14h 48m
Multiple Airlines
Mon 5/44:28 pm
ORD
- SDF
2 stops39h 08m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$249
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2912:11 pm
SDF
- ORD
Nonstop1h 40m
American Airlines
Fri 5/13:48 pm
ORD
- SDF
Nonstop1h 42m
American Airlines
Deal found 3/17![American Airlines logo]()
$267
This American Airlines deal was found by Cheapflights users on 3/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3012:11 pm
SDF
- ORD
Nonstop1h 40m
American Airlines
Sat 5/28:05 am
ORD
- SDF
Nonstop1h 41m
American Airlines
Deal found 3/17![American Airlines logo]()
$274
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 March 18, 2026.
Search for one-way flight options from Louisville to Illinois. Find affordable one-way fares based on user searches. Data last updated March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:48 pm
SDF
- ORD
1 stop14h 43m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:48 pm
SDF
- ORD
1 stop26h 29m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:48 pm
SDF
- ORD
1 stop29h 39m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:48 pm
SDF
- MDW
2 stops23h 49m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:48 pm
SDF
- ORD
2 stops46h 12m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:48 pm
SDF
- MDW
2 stops27h 26m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 5/117:48 pm
SDF
- MDW
2 stops43h 24m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:06 pm
SDF
- ORD
1 stop16h 25m
Spirit Airlines
Deal found 3/17![Spirit Airlines logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/89:10 pm
SDF
- ORD
1 stop19h 04m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$128
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/77:20 am
SDF
- ORD
Nonstop1h 40m
United Airlines
Deal found 3/17![United Airlines logo]()
$129
This Southwest deal was found by Cheapflights users on 3/17. 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 4/73:30 pm
SDF
- MDW
Nonstop1h 15m
Southwest
Deal found 3/17![Southwest logo]()
$129
This Southwest deal was found by Cheapflights users on 3/15. 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.
Sat 4/256:40 am
SDF
- STL
1 stop2h 45m
Southwest
Deal found 3/15![Southwest logo]()
$133
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 March 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $234 (Kiwi.com) |
One-way from | $96 (Kiwi.com) |
Popular in | January |
Cheapest in | November |
Average price | $286 |
Good round-trip deal | $375 or less |
Good one-way deal | $178 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 2,558,603 searches. Data last updated March 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 - ORD
SDFORD
Louisville Intl
Wed 5/6
2:55 pm-3:35 pm
Nonstop1h 40m
Chicago O'Hare Intl
Mon 5/18
7:53 pm-10:30 pm
Nonstop1h 37m
$267
Quickest round-trip
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Wed 5/6
7:15 pm-7:30 pm
Nonstop1h 15m
Chicago Midway
Mon 5/18
12:45 pm-3:00 pm
Nonstop1h 15m
$267
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Tue 5/12
8:55 am-9:15 am
Nonstop1h 20m
Chicago Midway
Wed 5/13
6:20 pm-8:35 pm
Nonstop1h 15m
$271
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Wed 4/15
7:15 pm-7:30 pm
Nonstop1h 15m
Chicago Midway
Wed 4/22
6:20 pm-8:35 pm
Nonstop1h 15m
$271
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Sat 4/18
8:40 am-9:00 am
Nonstop1h 20m
Chicago Midway
Mon 4/20
6:45 pm-9:00 pm
Nonstop1h 15m
$274
LouisvilleSt. Louis
SDF - STL
SDFSTL
Louisville Intl
Mon 4/13
7:01 pm-11:46 pm
1 stop5h 45m
Lambert-St Louis
Wed 4/15
6:55 pm-12:25 am
1 stop4h 30m
$293
LouisvilleSt. Louis
SDF - STL
SDFSTL
Louisville Intl
Thu 4/30
7:56 am-1:05 pm
1 stop6h 09m
Lambert-St Louis
Sat 5/2
10:50 am-5:22 pm
1 stop5h 32m
$293
LouisvilleChicago
SDF - MDW
SDFMDW
Louisville Intl
Mon 4/6
6:15 pm-12:05 am
1 stop6h 50m
Chicago Midway
Wed 4/8
6:20 pm-8:35 pm
Nonstop1h 15m
$297
LouisvilleSt. Louis
SDF - STL
SDFSTL
Louisville Intl
Mon 4/13
4:45 pm-10:45 pm
2 stops7h 00m
Lambert-St Louis
Wed 4/15
6:35 am-12:40 pm
1 stop5h 05m
$298
LouisvilleChicago
SDF - ORD
SDFORD
Louisville Intl
Sat 4/18
6:04 am-12:49 pm
2 stops7h 45m
Chicago O'Hare Intl
Mon 4/20
5:04 pm-9:20 pm
1 stop3h 16m
$299
Showing 1-10 of 57 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, April is the cheapest month in which you can book a flight from Louisville to Illinois (average of $58). Flying from Louisville to Illinois in March is currently the most expensive (average of $164). 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 March 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 33% versus a flight at noon.
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 March 14, 2026.
Travelers seeking maximum savings on their Louisville to Illinois flight should consider departing on Friday 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.
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 March 18, 2026.
The most flights from SDF to USIL are scheduled on a Monday (38 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).
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 March 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.
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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 March 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 2,558,603 searches. Data last updated March 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$249 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$97 | Average$266 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$97 | Average$250 | FlexibilityNo cancel fee | On-time63% |