$125+ Cheap flights from Illinois to South Dakota
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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Nov 7 — Nov 141
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to South Dakota 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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Cheapest flights from Illinois to South DakotaExplore the most affordable flight options available from Illinois to South Dakota. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 8, 2026.
Explore the most affordable flight options available from Illinois to South Dakota. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 8, 2026.
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:30 pm -
Nonstop1h 59m
Sun 11/16:00 am -
Nonstop1h 55m
Deal found 10/7![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/299:40 am -
Nonstop1h 54m
Sun 11/16:00 am -
1 stop6h 24m
Deal found 10/4![American Airlines logo]()
$308
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/173:00 pm -
1 stop7h 57m
Thu 12/315:00 am -
Nonstop2h 07m
Deal found 10/7![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/148:40 am -
Nonstop2h 51m
Sat 11/214:00 pm -
1 stop6h 59m
Deal found 10/6![United Airlines logo]()
$311
This American Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/2310:48 pm -
Nonstop1h 53m
Sun 10/257:39 pm -
Nonstop2h 01m
Deal found 10/4![American Airlines logo]()
$314
This American Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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.
Sun 11/225:11 pm -
1 stop7h 33m
Tue 11/247:36 pm -
1 stop4h 31m
Deal found 10/5![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/35:31 pm -
1 stop5h 51m
Tue 11/108:31 am -
1 stop3h 19m
Deal found 10/6![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/78:40 am -
Nonstop2h 51m
Mon 11/912:39 pm -
1 stop7h 51m
Deal found 10/5![United Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 11/46:59 am -
1 stop6h 40m
Sat 11/146:11 am -
1 stop7h 01m
Deal found 10/3![American Airlines logo]()
$321
This American Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/2412:10 pm -
1 stop7h 41m
Mon 10/267:05 am -
Nonstop1h 57m
Deal found 10/4![American Airlines logo]()
$324
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:48 pm -
Nonstop1h 53m
Sun 10/257:39 pm -
Nonstop2h 01m
Deal found 10/7![American Airlines logo]()
$329
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:40 am -
Nonstop2h 51m
Sun 11/15:00 am -
1 stop5h 19m
Deal found 10/7![United Airlines logo]()
$329
Best flights from Illinois to South DakotaDiscover carefully curated flight deals from Illinois to South Dakota that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2026.
Discover carefully curated flight deals from Illinois to South Dakota that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2026.
This United Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/297:45 pm -
Nonstop1h 52m
Sat 10/3111:14 am -
Nonstop1h 55m
Deal found 10/3![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:37 pm -
1 stop7h 07m
Sat 11/287:36 pm -
1 stop4h 28m
Deal found 10/7![American Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:29 am -
2 stops7h 29m
Mon 11/26:39 am -
1 stop4h 08m
Deal found 10/7![Delta logo]()
$494
This Kiwi.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:32 am -
1 stop23h 39m
Sun 11/295:41 pm -
2 stops41h 52m
Deal found 10/2![Multiple Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 1/278:15 am -
1 stop6h 21m
Sat 1/307:30 am -
1 stop6h 14m
Deal found 10/5![United Airlines logo]()
$355
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/48:40 am -
Nonstop2h 51m
Wed 11/111:30 pm -
Nonstop2h 33m
Deal found 10/6![United Airlines logo]()
$390
This United Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 11/132:31 pm -
1 stop7h 06m
Sun 11/156:00 am -
1 stop4h 05m
Deal found 10/3![United Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/299:29 am -
2 stops10h 26m
Sun 11/18:30 am -
1 stop3h 17m
Deal found 10/4![Delta logo]()
$502
This KAYAK deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/95:37 pm -
1 stop6h 52m
Thu 11/126:00 am -
1 stop5h 55m
Deal found 10/6![American Airlines logo]()
$547
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/39:29 am -
2 stops6h 31m
Tue 11/105:05 am -
1 stop3h 45m
Deal found 10/6![Delta logo]()
$503
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/305:41 pm -
1 stop4h 57m
Wed 2/32:40 pm -
1 stop5h 30m
Deal found 10/7![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 11/2412:30 pm -
1 stop3h 28m
Sat 11/288:31 am -
1 stop3h 19m
Deal found 10/2![Delta logo]()
$509
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/145:00 am -
1 stop6h 31m
Wed 11/1812:39 pm -
1 stop7h 33m
Deal found 10/7![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/296:20 am -
1 stop3h 40m
Sat 10/318:30 am -
2 stops7h 56m
Deal found 10/3![Delta logo]()
$518
This United Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 11/48:40 am -
Nonstop2h 51m
Sat 11/141:30 pm -
Nonstop2h 33m
Deal found 10/3![United Airlines logo]()
$449
This American Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 10/214:38 pm -
1 stop6h 18m
Sun 10/255:04 pm -
1 stop5h 13m
Deal found 10/5![American Airlines logo]()
$690
This Delta deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 10/105:31 pm -
1 stop5h 59m
Tue 10/136:39 am -
1 stop4h 08m
Deal found 10/5![Delta logo]()
$538
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 11/259:30 pm -
Nonstop1h 59m
Sat 11/287:40 am -
Nonstop1h 57m
Deal found 10/2![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 10/235:30 pm -
1 stop5h 52m
Sat 10/2411:00 am -
2 stops5h 26m
Deal found 10/6![Delta logo]()
$548
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:47 am -
Nonstop2h 28m
Sat 10/241:37 pm -
Nonstop2h 24m
Deal found 10/7![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 12/85:30 pm -
1 stop5h 47m
Fri 12/115:02 am -
1 stop3h 53m
Deal found 10/4![Delta logo]()
$557
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 12/165:00 am -
1 stop5h 37m
Thu 12/2411:15 am -
1 stop6h 41m
Deal found 10/5![United Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” 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 11/247:45 pm -
Nonstop1h 52m
Sun 11/297:48 am -
Nonstop1h 57m
Deal found 10/2![United Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/2910:12 am -
1 stop5h 48m
Sat 10/318:30 am -
1 stop3h 17m
Deal found 10/3![Delta logo]()
$604
This United Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 10/158:47 am -
Nonstop2h 28m
Sun 10/181:37 pm -
Nonstop2h 24m
Deal found 10/3![United Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 12/45:30 pm -
1 stop6h 16m
Wed 12/96:42 am -
2 stops10h 19m
Deal found 10/3![Delta logo]()
$608
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 10/235:00 am -
1 stop5h 50m
Sun 10/257:48 am -
Nonstop1h 57m
Deal found 10/6![United Airlines logo]()
$504
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 10/165:31 pm -
1 stop5h 51m
Tue 10/208:30 am -
1 stop3h 17m
Deal found 10/6![Delta logo]()
$639
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/1410:34 am -
1 stop6h 20m
Sat 11/2111:29 am -
1 stop4h 10m
Deal found 10/6![Delta logo]()
$640
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 10/168:47 am -
Nonstop2h 28m
Sun 10/181:37 pm -
Nonstop2h 24m
Deal found 10/6![United Airlines logo]()
$529
Last-minute flights from Illinois to South DakotaDiscover last-minute flight deals from Illinois to South Dakota. Data last updated October 8, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to South Dakota. Data last updated October 8, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:48 pm -
Nonstop1h 53m
Sun 10/257:39 pm -
Nonstop2h 01m
Deal found 10/7![American Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/2310:48 pm -
Nonstop1h 53m
Sun 10/257:39 pm -
Nonstop2h 01m
Deal found 10/4![American Airlines logo]()
$314
This American Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/2412:10 pm -
1 stop7h 41m
Mon 10/267:05 am -
Nonstop1h 57m
Deal found 10/4![American Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:40 am -
Nonstop2h 51m
Sun 11/15:00 am -
1 stop5h 19m
Deal found 10/7![United Airlines logo]()
$329
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:30 pm -
Nonstop1h 59m
Sun 11/16:00 am -
Nonstop1h 55m
Deal found 10/7![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” 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 10/299:40 am -
Nonstop1h 54m
Sun 11/16:00 am -
1 stop6h 24m
Deal found 10/4![American Airlines logo]()
$308
This Delta deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/35:31 pm -
1 stop5h 51m
Tue 11/108:31 am -
1 stop3h 19m
Deal found 10/6![Delta logo]()
$319
This American Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” 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 11/46:59 am -
1 stop6h 40m
Sat 11/146:11 am -
1 stop7h 01m
Deal found 10/3![American Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/78:40 am -
Nonstop2h 51m
Mon 11/912:39 pm -
1 stop7h 51m
Deal found 10/5![United Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/115:00 am -
1 stop7h 28m
Mon 11/167:18 pm -
Nonstop2h 12m
Deal found 10/6![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/148:40 am -
Nonstop2h 51m
Sat 11/214:00 pm -
1 stop6h 59m
Deal found 10/6![United Airlines logo]()
$311
This American Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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.
Sun 11/225:11 pm -
1 stop7h 33m
Tue 11/247:36 pm -
1 stop4h 31m
Deal found 10/5![American Airlines logo]()
$319
One-way flights from Illinois to South DakotaSearch for one-way flight options from Illinois to South Dakota. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
Search for one-way flight options from Illinois to South Dakota. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:21 am -
1 stop15h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 12/26:21 am -
1 stop29h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 12/36:10 am -
1 stop27h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Multiple Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/78:25 am -
1 stop26h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 11/44:36 pm -
2 stops22h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” 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 10/296:30 am -
2 stops28h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:32 pm -
2 stops38h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:35 pm -
3 stops43h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/66:21 am -
2 stops28h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/18:15 am -
3 stops28h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” 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 11/255:15 am -
2 stops29h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Multiple Airlines logo]()
$187
This American Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:00 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![American Airlines logo]()
$189
Find flight deals from Illinois to South Dakota
Keep the following information in mind while searching for Illinois to South Dakota flight deals. Data was last updated October 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (United Airlines) |
One-way from | $125 (Kiwi.com) |
Popular in | April |
Cheapest in | January |
Average price | $337 |
Good round-trip deal | $329 or less |
Good one-way deal | $320 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to South Dakota 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 October 8, 2026.
Use the filters below to find and compare flights from Illinois to South Dakota that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSioux Falls
MDW Chicago Midway - FSD Sioux Falls Joe Foss Field
MDWFSD
Chicago Midway
Wed 11/4
6:16 am-8:38 am
3 stops50h 22m
Sioux Falls Joe Foss Field
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$217
ChicagoRapid City
MDW Chicago Midway - RAP Rapid City
MDWRAP
Chicago Midway
Wed 12/9
12:28 pm-8:58 pm
2 stops33h 30m
Rapid City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$245
ChicagoRapid City
ORD Chicago O'Hare Intl - RAP Rapid City
ORDRAP
Chicago O'Hare Intl
Wed 11/4
8:40 am-10:31 am
Nonstop2h 51m
Rapid City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$259
ChicagoRapid City
ORD Chicago O'Hare Intl - RAP Rapid City
ORDRAP
Chicago O'Hare Intl
Tue 1/5
5:20 pm-10:39 pm
1 stop6h 19m
Rapid City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$269
ChicagoSioux Falls
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Tue 12/1
8:40 am-10:37 am
Nonstop1h 57m
Sioux Falls Joe Foss Field
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
ChicagoRapid City
MDW Chicago Midway - RAP Rapid City
MDWRAP
Chicago Midway
Tue 12/8
10:24 am-2:00 pm
1 stop4h 36m
Rapid City
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$269
ChicagoSioux Falls
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Thu 4/1
7:45 pm-9:43 pm
Nonstop1h 58m
Sioux Falls Joe Foss Field
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
ChicagoSioux Falls
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Sun 1/3
9:20 pm-11:26 pm
Nonstop2h 06m
Sioux Falls Joe Foss Field
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
ChicagoSioux Falls
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Sat 11/7
9:30 pm-11:29 pm
Nonstop1h 59m
Sioux Falls Joe Foss Field
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
Quickest round-trip
ChicagoSioux Falls
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Fri 12/4
9:40 pm-11:30 pm
Nonstop1h 50m
Sioux Falls Joe Foss Field
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to South Dakota
Have a flexible travel schedule? Discover the best time to fly to South Dakota from Illinois with our price prediction graph.
ORD-FSD
ORD-RAP
MLI-FSD
MDW-FSD
PIA-FSD
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 South Dakota
USIL-USSD
ORD-FSD
ORD-RAP
MLI-FSD
MDW-FSD
What is the cheapest month to book a flight from Illinois to South Dakota?
Currently, December is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $323). Flying from Illinois to South Dakota in September is currently the most expensive (average of $405). 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 SD?
Find hourly flight availability from Illinois to South Dakota. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 8, 2026.
One of the essential ways to save on airfare from Illinois to South Dakota is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 7% on airfare.
Weekly flight availability from Illinois to South Dakota
Explore weekly flight availability from Illinois to South Dakota. 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 October 8, 2026.
The most flights from USIL to USSD are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 on average).
How much does it cost to fly round-trip from Illinois to South Dakota?
Airfare is typical for this route at the moment.
Illinois to South Dakota flights typically cost between $279 and $370 in October.The cheapest round-trip price found within the last 5 days was $299 on United Airlines (Oct 29-Nov 1).
How far ahead should I book a flight from Illinois to South Dakota?
Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to South Dakota. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Illinois to South Dakota?
Use this chart to determine the cheapest time to fly round-trip from Illinois to South Dakota. Price data was last updated on April 4, 2026.
Travelers seeking maximum savings on their Illinois to South Dakota flight should consider departing on Thursday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing South Dakota
Get insights into the airlines that provide service to South Dakota. 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 South Dakota. Reviews last updated October 8, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican Airlines from Illinois to South Dakota. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Entertainment
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Entertainment
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Entertainment
7.8
Food
7.2
Comfort
7.8
Crew
8.5
Boarding
8.1
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Related info for your journey
Find useful and relevant information for your journey from Illinois to South Dakota. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Illinois to South Dakota
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Complete your trip
Complete your trip to South Dakota by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to South Dakota by cabin class
Find flights from Illinois to South Dakota, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and South Dakota flights
Browse other Illinois and South Dakota flight options. Last updated on October 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from South Dakota
Find the right flight back to Illinois after your stay in South Dakota
Illinois to South Dakota flights
Consider these flights traveling from Illinois to South Dakota.
Top 2 airlines flying from Illinois to South Dakota
Discover the top 2 airlines that operate flights from Illinois to South Dakota. 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 October 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$189 | Average$404 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$189 | Average$443 | FlexibilityNo cancel fee | On-time69% |