$90+ Cheap flights from Illinois to South Dakota
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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Sep 12 — Sep 191
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 August 13, 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 August 13, 2026.
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:39 pm -
Nonstop1h 50m
Sun 9/206:41 pm -
Nonstop2h 18m
Deal found 8/11![American Airlines logo]()
$259
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:00 pm -
Nonstop1h 53m
Sun 8/305:23 pm -
Nonstop2h 11m
Deal found 8/8![American Airlines logo]()
$260
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:39 pm -
Nonstop1h 50m
Tue 9/297:00 am -
Nonstop2h 10m
Deal found 8/8![American Airlines logo]()
$261
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:40 am -
Nonstop2h 51m
Tue 11/171:30 pm -
Nonstop2h 33m
Deal found 8/9![United Airlines logo]()
$261
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:09 pm -
1 stop7h 33m
Fri 9/257:00 am -
Nonstop2h 10m
Deal found 8/9![American Airlines logo]()
$270
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:00 pm -
Nonstop2h 37m
Tue 9/296:07 pm -
Nonstop2h 38m
Deal found 8/12![American Airlines logo]()
$270
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:00 am -
1 stop5h 47m
Tue 9/226:07 pm -
Nonstop2h 38m
Deal found 8/9![American Airlines logo]()
$271
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:40 pm -
Nonstop1h 50m
Mon 8/315:23 pm -
Nonstop2h 11m
Deal found 8/10![American Airlines logo]()
$274
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:40 am -
Nonstop2h 35m
Sun 10/46:07 pm -
Nonstop2h 38m
Deal found 8/12![American Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:25 pm -
1 stop3h 26m
Mon 9/75:00 am -
1 stop3h 39m
Deal found 8/12![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:00 am -
1 stop7h 16m
Thu 10/15:55 pm -
1 stop6h 19m
Deal found 8/9![American Airlines logo]()
$281
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:36 am -
1 stop5h 41m
Tue 9/1512:56 pm -
1 stop6h 11m
Deal found 8/9![American Airlines logo]()
$281
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 August 13, 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 August 13, 2026.
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:39 pm -
Nonstop1h 50m
Sun 9/206:41 pm -
Nonstop2h 18m
Deal found 8/8![American Airlines logo]()
$259
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:40 am -
Nonstop2h 51m
Tue 11/171:30 pm -
Nonstop2h 33m
Deal found 8/9![United Airlines logo]()
$261
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:50 pm -
1 stop5h 01m
Tue 9/295:05 am -
1 stop3h 25m
Deal found 8/8![Delta logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/122:00 pm -
2 stops18h 38m
Sun 11/152:18 pm -
1 stop8h 21m
Deal found 8/9![Multiple Airlines logo]()
$412
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:25 pm -
1 stop3h 26m
Mon 9/75:00 am -
1 stop3h 39m
Deal found 8/12![Delta logo]()
$279
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:00 am -
1 stop5h 28m
Sat 10/241:37 pm -
Nonstop2h 24m
Deal found 8/11![United Airlines logo]()
$280
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:36 am -
1 stop5h 41m
Tue 9/1512:56 pm -
1 stop6h 11m
Deal found 8/9![American Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:00 am -
1 stop5h 27m
Wed 9/165:48 pm -
1 stop5h 11m
Deal found 8/11![United Airlines logo]()
$290
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:43 am -
1 stop5h 04m
Wed 9/304:56 pm -
1 stop5h 47m
Deal found 8/10![American Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:30 pm -
1 stop5h 42m
Sun 9/137:40 am -
1 stop4h 22m
Deal found 8/8![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:45 pm -
1 stop7h 14m
Sat 8/2912:57 pm -
2 stops11h 01m
Deal found 8/10![American Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:47 am -
Nonstop2h 28m
Mon 10/265:50 pm -
1 stop5h 09m
Deal found 8/10![United Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:04 am -
2 stops25h 15m
Sun 10/111:28 pm -
1 stop11h 31m
Deal found 8/12![Multiple Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:13 pm -
1 stop3h 38m
Sun 9/205:05 am -
1 stop3h 43m
Deal found 8/12![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:39 pm -
1 stop5h 04m
Sat 11/148:45 am -
1 stop7h 12m
Deal found 8/12![United Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:32 am -
2 stops10h 55m
Sat 11/141:09 pm -
2 stops9h 50m
Deal found 8/12![American Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:00 am -
1 stop4h 20m
Sat 8/221:26 pm -
1 stop4h 15m
Deal found 8/12![Delta logo]()
$414
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/109:20 pm -
Nonstop1h 52m
Mon 9/146:41 pm -
Nonstop1h 57m
Deal found 8/11![United Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:00 am -
2 stops8h 17m
Wed 9/306:07 pm -
1 stop5h 20m
Deal found 8/8![American Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:01 am -
1 stop4h 56m
Mon 10/2611:29 am -
1 stop4h 18m
Deal found 8/8![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:54 pm -
1 stop4h 28m
Sat 8/296:00 am -
1 stop6h 40m
Deal found 8/10![United Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:24 am -
1 stop4h 18m
Mon 11/307:31 pm -
1 stop4h 32m
Deal found 8/11![American Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:40 am -
1 stop4h 49m
Sun 8/307:47 am -
1 stop4h 34m
Deal found 8/12![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/299:24 am -
2 stops6h 24m
Sun 8/305:00 am -
1 stop3h 39m
Deal found 8/8![Delta logo]()
$467
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am -
1 stop5h 55m
Tue 9/155:48 pm -
1 stop5h 11m
Deal found 8/9![United Airlines logo]()
$335
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:33 pm -
1 stop5h 50m
Thu 9/176:07 pm -
1 stop4h 58m
Deal found 8/10![American Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/152:30 pm -
2 stops8h 21m
Fri 8/284:28 pm -
1 stop5h 19m
Deal found 8/11![Delta logo]()
$482
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:56 pm -
1 stop5h 41m
Thu 9/105:48 pm -
1 stop5h 11m
Deal found 8/10![United Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:55 pm -
1 stop4h 38m
Wed 9/301:37 pm -
1 stop6h 44m
Deal found 8/9![United Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:59 am -
1 stop5h 47m
Fri 9/258:23 am -
2 stops10h 10m
Deal found 8/9![Delta logo]()
$518
Last-minute flights from Illinois to South DakotaDiscover last-minute flight deals from Illinois to South Dakota. Data last updated August 13, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to South Dakota. Data last updated August 13, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:40 pm -
Nonstop1h 50m
Mon 8/315:23 pm -
Nonstop2h 11m
Deal found 8/10![American Airlines logo]()
$274
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/293:00 pm -
Nonstop1h 53m
Sun 8/305:23 pm -
Nonstop2h 11m
Deal found 8/8![American Airlines logo]()
$260
This Delta deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:25 pm -
1 stop3h 26m
Mon 9/75:00 am -
1 stop3h 39m
Deal found 8/12![Delta logo]()
$279
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:36 am -
1 stop5h 41m
Tue 9/1512:56 pm -
1 stop6h 11m
Deal found 8/9![American Airlines logo]()
$281
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:09 pm -
1 stop7h 33m
Fri 9/257:00 am -
Nonstop2h 10m
Deal found 8/9![American Airlines logo]()
$270
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:39 pm -
Nonstop1h 50m
Sun 9/206:41 pm -
Nonstop2h 18m
Deal found 8/11![American Airlines logo]()
$259
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:00 am -
1 stop5h 47m
Tue 9/226:07 pm -
Nonstop2h 38m
Deal found 8/9![American Airlines logo]()
$271
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:39 pm -
Nonstop1h 50m
Tue 9/297:00 am -
Nonstop2h 10m
Deal found 8/8![American Airlines logo]()
$261
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:00 am -
1 stop5h 47m
Wed 9/304:56 pm -
1 stop6h 18m
Deal found 8/11![American Airlines logo]()
$281
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:00 am -
1 stop7h 16m
Thu 10/15:55 pm -
1 stop6h 19m
Deal found 8/9![American Airlines logo]()
$281
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:00 pm -
Nonstop2h 37m
Tue 9/296:07 pm -
Nonstop2h 38m
Deal found 8/12![American Airlines logo]()
$270
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:40 am -
Nonstop2h 35m
Sun 10/46:07 pm -
Nonstop2h 38m
Deal found 8/12![American Airlines logo]()
$279
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 August 13, 2026.
Search for one-way flight options from Illinois to South Dakota. Find affordable one-way fares based on user searches. Data last updated August 13, 2026.
This Frontier deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1011:06 am -
1 stop7h 30m
Deal found 8/11![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/611:06 am -
1 stop8h 47m
Deal found 8/10![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am -
1 stop32h 06m
Deal found 8/12![Multiple Airlines logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:21 pm -
1 stop23h 25m
Deal found 8/12![Multiple Airlines logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:21 pm -
1 stop31h 51m
Deal found 8/10![Multiple Airlines logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/127:00 am -
1 stop8h 06m
Deal found 8/13![Multiple Airlines logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:30 am -
2 stops28h 46m
Deal found 8/11![Multiple Airlines logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:30 am -
1 stop13h 37m
Deal found 8/9![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:30 am -
2 stops30h 45m
Deal found 8/12![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/62:41 pm -
1 stop29h 20m
Deal found 8/12![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am -
2 stops27h 15m
Deal found 8/12![Multiple Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/510:40 pm -
1 stop21h 13m
Deal found 8/9![Frontier logo]()
$154
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 August 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $259 (American Airlines) |
One-way from | $90 (Frontier) |
Popular in | July |
Cheapest in | January |
Average price | $349 |
Good round-trip deal | $289 or less |
Good one-way deal | $249 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 2,558,603 searches. Data last updated August 13, 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
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Thu 9/17
10:39 pm-12:29 am
Nonstop1h 50m
Sioux Falls Joe Foss Field
Sun 9/20
6:41 pm-8:59 pm
Nonstop2h 18m
$259
ChicagoRapid City
ORD Chicago O'Hare Intl - RAP Rapid City
ORDRAP
Chicago O'Hare Intl
Sat 11/14
8:40 am-10:31 am
Nonstop2h 51m
Rapid City
Tue 11/17
1:30 pm-5:03 pm
Nonstop2h 33m
$261
ChicagoSioux Falls
ORD Chicago O'Hare Intl - FSD Sioux Falls Joe Foss Field
ORDFSD
Chicago O'Hare Intl
Tue 9/22
5:50 pm-10:51 pm
1 stop5h 01m
Sioux Falls Joe Foss Field
Tue 9/29
5:05 am-8:30 am
1 stop3h 25m
$279
ChicagoSioux Falls
MDW Chicago Midway - FSD Sioux Falls Joe Foss Field
MDWFSD
Chicago Midway
Fri 9/4
7:25 pm-10:51 pm
1 stop3h 26m
Sioux Falls Joe Foss Field
Mon 9/7
5:00 am-8:39 am
1 stop3h 39m
$279
ChicagoRapid City
ORD Chicago O'Hare Intl - RAP Rapid City
ORDRAP
Chicago O'Hare Intl
Mon 10/19
5:00 am-9:28 am
1 stop5h 28m
Rapid City
Sat 10/24
1:37 pm-5:01 pm
Nonstop2h 24m
$280
St. LouisSioux Falls
STL Lambert-St Louis - FSD Sioux Falls Joe Foss Field
STLFSD
Lambert-St Louis
Tue 9/8
6:36 am-12:17 pm
1 stop5h 41m
Sioux Falls Joe Foss Field
Tue 9/15
12:56 pm-7:07 pm
1 stop6h 11m
$281
ChicagoRapid City
ORD Chicago O'Hare Intl - RAP Rapid City
ORDRAP
Chicago O'Hare Intl
Wed 9/9
5:00 am-9:27 am
1 stop5h 27m
Rapid City
Wed 9/16
5:48 pm-11:59 pm
1 stop5h 11m
$290
St. LouisSioux Falls
STL Lambert-St Louis - FSD Sioux Falls Joe Foss Field
STLFSD
Lambert-St Louis
Thu 9/10
5:30 pm-11:12 pm
1 stop5h 42m
Sioux Falls Joe Foss Field
Sun 9/13
7:40 am-12:02 pm
1 stop4h 22m
$299
ChicagoRapid City
ORD Chicago O'Hare Intl - RAP Rapid City
ORDRAP
Chicago O'Hare Intl
Thu 10/22
8:47 am-10:15 am
Nonstop2h 28m
Rapid City
Mon 10/26
5:50 pm-11:59 pm
1 stop5h 09m
$309
St. LouisRapid City
STL Lambert-St Louis - RAP Rapid City
STLRAP
Lambert-St Louis
Sun 9/20
5:43 am-9:47 am
1 stop5h 04m
Rapid City
Wed 9/30
4:56 pm-11:43 pm
1 stop5h 47m
$319
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
MDW-FSD
STL-FSD
MDW-RAP
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
MDW-FSD
STL-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 $314). Flying from Illinois to South Dakota in January 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 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 August 13, 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 afternoon tend to be the most expensive. A flight at noon could potentially save you up to 5% 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 August 13, 2026.
The most flights from USIL to USSD are scheduled on a Tuesday (16 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (8 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 $239 and $439 in September.The cheapest round-trip price found within the last 5 days was $259 on American Airlines (Sep 17-Sep 20).
How far ahead should I book a flight from Illinois to South Dakota?
Booking 30 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. Sunday afternoons 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 August 13, 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.
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.8
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.8
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.8
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.8
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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
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Illinois and South Dakota flights
Browse other Illinois and South Dakota flight options. Last updated on August 13, 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 2,558,603 searches. Data last updated August 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$189 | Average$391 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$194 | Average$407 | FlexibilityNo cancel fee | On-time69% |