$140+ Cheap flights from South Dakota to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Nov 8 — Nov 151
Round-trip
1 adult, Economy
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Find cheap flights from South Dakota to Illinois with Cheapflights
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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 South Dakota to IllinoisExplore the most affordable flight options available from South Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 9, 2026.
Explore the most affordable flight options available from South Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 9, 2026.
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 11/67:48 am -
Nonstop1h 57m
Fri 11/134:00 pm -
Nonstop1h 54m
Deal found 10/6![United Airlines logo]()
$299
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.
Tue 12/156:00 am -
Nonstop2h 34m
Tue 1/57:45 pm -
Nonstop2h 53m
Deal found 10/7![United Airlines logo]()
$301
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.
Thu 11/57:18 pm -
Nonstop2h 12m
Sun 11/810:38 pm -
Nonstop1h 51m
Deal found 10/6![American Airlines logo]()
$305
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 10/297:05 am -
Nonstop1h 57m
Mon 11/26:00 am -
1 stop6h 28m
Deal found 10/4![American Airlines logo]()
$308
This American Airlines deal was found by Cheapflights users on 10/8. 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 11/67:18 pm -
Nonstop2h 12m
Sun 11/85:00 am -
1 stop7h 28m
Deal found 10/8![American Airlines logo]()
$309
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 11/41:30 pm -
Nonstop2h 33m
Wed 11/118:40 am -
Nonstop2h 51m
Deal found 10/7![United Airlines logo]()
$310
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 10/227:39 pm -
Nonstop2h 01m
Thu 10/2910:48 pm -
Nonstop1h 53m
Deal found 10/7![American Airlines logo]()
$314
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 11/47:48 am -
1 stop6h 05m
Wed 11/115:30 pm -
1 stop4h 07m
Deal found 10/7![United Airlines 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.
Tue 11/31:30 pm -
Nonstop2h 33m
Tue 11/108:40 am -
Nonstop2h 51m
Deal found 10/5![United Airlines logo]()
$319
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.
Sat 10/247:39 pm -
Nonstop2h 01m
Wed 10/285:07 pm -
Nonstop1h 58m
Deal found 10/6![American Airlines logo]()
$320
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.
Tue 12/156:42 am -
1 stop7h 11m
Tue 1/56:00 am -
1 stop6h 12m
Deal found 10/7![Delta logo]()
$321
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.
Tue 12/156:42 am -
1 stop4h 17m
Tue 1/55:35 pm -
1 stop6h 04m
Deal found 10/7![Delta logo]()
$321
Best flights from South Dakota to IllinoisDiscover carefully curated flight deals from South Dakota to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
Discover carefully curated flight deals from South Dakota to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
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 12/116:00 am -
Nonstop2h 00m
Sun 12/138:40 am -
Nonstop1h 57m
Deal found 10/6![United Airlines logo]()
$299
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.
Fri 11/207:36 pm -
1 stop4h 31m
Sun 11/225:11 pm -
1 stop7h 33m
Deal found 10/6![American Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 10/8. 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.
Fri 10/236:45 am -
1 stop4h 55m
Tue 10/273:30 pm -
1 stop3h 58m
Deal found 10/8![Delta logo]()
$354
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 11/217:40 am -
Nonstop1h 57m
Mon 11/307:45 pm -
Nonstop1h 52m
Deal found 10/5![United Airlines logo]()
$299
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.
Thu 12/109:45 am -
Nonstop2h 02m
Sun 12/138:40 am -
Nonstop1h 57m
Deal found 10/6![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 10/8. 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 10/237:39 pm -
1 stop4h 31m
Tue 10/2712:31 pm -
1 stop8h 30m
Deal found 10/8![American Airlines logo]()
$349
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.
Thu 10/226:39 am -
1 stop4h 08m
Tue 10/2710:12 am -
1 stop6h 46m
Deal found 10/5![Delta logo]()
$359
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 11/47:48 am -
1 stop6h 05m
Wed 11/115:30 pm -
1 stop4h 07m
Deal found 10/7![United Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 10/8. 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 10/235:04 pm -
1 stop5h 19m
Tue 10/274:42 pm -
1 stop5h 57m
Deal found 10/8![American Airlines logo]()
$369
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 10/232:37 pm -
1 stop4h 01m
Sun 10/256:20 am -
1 stop5h 25m
Deal found 10/7![Delta logo]()
$379
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.
Tue 11/35:50 pm -
1 stop5h 09m
Tue 11/108:40 am -
Nonstop2h 51m
Deal found 10/5![United Airlines logo]()
$320
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 11/47:18 pm -
1 stop4h 45m
Wed 11/115:37 pm -
1 stop6h 52m
Deal found 10/7![American Airlines logo]()
$382
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 2/182:40 pm -
1 stop5h 49m
Mon 3/18:17 pm -
Nonstop2h 53m
Deal found 10/7![United Airlines logo]()
$329
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.
Thu 11/194:36 pm -
1 stop3h 57m
Sun 11/226:23 am -
1 stop5h 00m
Deal found 10/7![Delta logo]()
$409
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:37 pm -
Nonstop2h 24m
Mon 11/22:30 pm -
1 stop7h 13m
Deal found 10/4![United Airlines logo]()
$349
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.
Tue 10/207:39 pm -
1 stop4h 20m
Sat 10/246:05 am -
1 stop6h 08m
Deal found 10/5![American Airlines logo]()
$441
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.
Tue 11/311:29 am -
1 stop4h 18m
Tue 11/105:29 pm -
1 stop6h 12m
Deal found 10/5![Delta logo]()
$469
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 10/211:37 pm -
Nonstop2h 24m
Sun 10/258:40 am -
Nonstop2h 37m
Deal found 10/6![United Airlines logo]()
$359
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 10/221:37 pm -
Nonstop2h 24m
Mon 10/268:40 am -
Nonstop2h 51m
Deal found 10/7![United Airlines logo]()
$359
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 11/128:31 am -
1 stop3h 17m
Sat 11/147:25 am -
2 stops8h 33m
Deal found 10/3![Delta logo]()
$491
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:30 pm -
1 stop7h 21m
Sat 10/248:45 am -
1 stop4h 41m
Deal found 10/4![United Airlines logo]()
$369
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.
Thu 12/1712:59 pm -
1 stop3h 44m
Wed 1/61:35 pm -
2 stops9h 16m
Deal found 10/5![Delta logo]()
$536
This United Airlines deal was found by Cheapflights users on 10/8. 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 10/221:37 pm -
1 stop4h 24m
Sun 10/256:25 am -
1 stop4h 52m
Deal found 10/8![United Airlines logo]()
$369
This American Airlines deal was found by Cheapflights users on 10/8. 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 11/67:18 pm -
1 stop4h 45m
Tue 11/106:15 am -
2 stops12h 33m
Deal found 10/8![American Airlines logo]()
$597
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 11/255:06 pm -
1 stop5h 40m
Sat 11/287:45 pm -
Nonstop1h 52m
Deal found 10/6![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 10/8. 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.
Thu 12/246:45 am -
2 stops6h 01m
Mon 12/283:29 pm -
1 stop4h 10m
Deal found 10/8![Delta logo]()
$563
This United Airlines deal was found by Cheapflights users on 10/8. 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.
Fri 10/2310:26 am -
2 stops11h 32m
Tue 10/278:41 am -
1 stop5h 07m
Deal found 10/8![United Airlines logo]()
$374
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 11/278:31 am -
1 stop6h 24m
Mon 11/3012:38 pm -
1 stop6h 28m
Deal found 10/3![Delta logo]()
$590
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 11/198:30 am -
1 stop5h 25m
Sun 11/227:00 am -
1 stop5h 58m
Deal found 10/3![United Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 10/8. 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.
Fri 10/236:45 am -
1 stop5h 02m
Tue 10/2710:59 am -
2 stops8h 29m
Deal found 10/8![Delta logo]()
$609
Last-minute flights from South Dakota to IllinoisDiscover last-minute flight deals from South Dakota to Illinois. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from South Dakota to Illinois. Data last updated October 9, 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.
Thu 10/227:39 pm -
Nonstop2h 01m
Thu 10/2910:48 pm -
Nonstop1h 53m
Deal found 10/7![American Airlines logo]()
$314
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 10/227:39 pm -
Nonstop2h 01m
Sat 10/2412:26 pm -
Nonstop1h 52m
Deal found 10/7![American Airlines logo]()
$329
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:37 pm -
Nonstop2h 24m
Tue 10/278:40 am -
Nonstop2h 51m
Deal found 10/4![United Airlines logo]()
$339
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.
Sat 10/247:39 pm -
Nonstop2h 01m
Wed 10/285:07 pm -
Nonstop1h 58m
Deal found 10/6![American Airlines logo]()
$320
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 10/297:05 am -
Nonstop1h 57m
Mon 11/26:00 am -
1 stop6h 28m
Deal found 10/4![American Airlines logo]()
$308
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.
Tue 11/31:30 pm -
Nonstop2h 33m
Tue 11/108:40 am -
Nonstop2h 51m
Deal found 10/5![United Airlines logo]()
$319
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 11/41:30 pm -
Nonstop2h 33m
Wed 11/118:40 am -
Nonstop2h 51m
Deal found 10/7![United Airlines logo]()
$310
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 11/47:48 am -
1 stop6h 05m
Wed 11/115:30 pm -
1 stop4h 07m
Deal found 10/7![United Airlines logo]()
$319
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.
Thu 11/57:18 pm -
Nonstop2h 12m
Sun 11/810:38 pm -
Nonstop1h 51m
Deal found 10/6![American Airlines logo]()
$305
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 11/67:48 am -
Nonstop1h 57m
Fri 11/134:00 pm -
Nonstop1h 54m
Deal found 10/6![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 10/8. 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 11/67:18 pm -
Nonstop2h 12m
Sun 11/85:00 am -
1 stop7h 28m
Deal found 10/8![American Airlines logo]()
$309
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.
Fri 11/207:36 pm -
1 stop4h 31m
Sun 11/225:11 pm -
1 stop7h 33m
Deal found 10/6![American Airlines logo]()
$334
One-way flights from South Dakota to IllinoisSearch for one-way flight options from South Dakota to Illinois. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
Search for one-way flight options from South Dakota to Illinois. Find affordable one-way fares based on user searches. Data last updated October 9, 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 1/710:02 pm -
1 stop31h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 10/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/711:05 am -
2 stops44h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Multiple Airlines logo]()
$149
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.
Mon 11/28:39 pm -
2 stops27h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$158
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.
Mon 1/46:40 pm -
2 stops17h 10m
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 10/7. 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.
Sun 1/1010:02 pm -
2 stops25h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$176
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.
Fri 11/610:31 pm -
2 stops25h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$178
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.
Tue 4/611:53 am -
Nonstop2h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![American Airlines logo]()
$179
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 11/52:56 pm -
1 stop13h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$183
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 12/61:09 pm -
1 stop8h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![American Airlines logo]()
$189
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.
Sun 11/812:06 pm -
3 stops35h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 10/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/84:37 pm -
1 stop12h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Multiple Airlines logo]()
$197
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.
Sun 11/2210:08 pm -
1 stop30h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$204
Find flight deals from South Dakota to Illinois
Keep the following information in mind while searching for South Dakota to Illinois flight deals. Data was last updated October 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (United Airlines) |
One-way from | $140 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $334 |
Good round-trip deal | $411 or less |
Good one-way deal | $328 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from South Dakota to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 9, 2026.
Use the filters below to find and compare flights from South Dakota to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Tue 1/5
6:00 am-9:39 am
Nonstop2h 39m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$259
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Wed 1/6
6:00 am-9:39 am
Nonstop2h 39m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$259
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Wed 11/4
4:38 pm-9:27 pm
1 stop3h 49m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$269
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Tue 1/5
4:00 pm-9:37 pm
1 stop4h 37m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$269
Quickest round-trip
Sioux FallsChicago
FSD Sioux Falls Joe Foss Field - ORD Chicago O'Hare Intl
FSDORD
Sioux Falls Joe Foss Field
Tue 11/3
6:40 pm-8:35 pm
Nonstop1h 55m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
Sioux FallsChicago
FSD Sioux Falls Joe Foss Field - ORD Chicago O'Hare Intl
FSDORD
Sioux Falls Joe Foss Field
Wed 11/4
6:00 am-7:55 am
Nonstop1h 55m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
Sioux FallsChicago
FSD Sioux Falls Joe Foss Field - ORD Chicago O'Hare Intl
FSDORD
Sioux Falls Joe Foss Field
Fri 11/6
7:48 am-9:45 am
Nonstop1h 57m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
Sioux FallsChicago
FSD Sioux Falls Joe Foss Field - ORD Chicago O'Hare Intl
FSDORD
Sioux Falls Joe Foss Field
Tue 1/5
10:58 am-4:49 pm
1 stop5h 51m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$279
Sioux FallsChicago
FSD Sioux Falls Joe Foss Field - ORD Chicago O'Hare Intl
FSDORD
Sioux Falls Joe Foss Field
Sun 12/6
5:02 am-9:04 am
1 stop4h 02m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$279
Sioux FallsChicago
FSD Sioux Falls Joe Foss Field - ORD Chicago O'Hare Intl
FSDORD
Sioux Falls Joe Foss Field
Sat 11/14
1:00 pm-4:41 pm
1 stop3h 41m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$279
Showing 1-10 of 58 resultsSorted by cheapest first
Best time to book a flight from South Dakota to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from South Dakota with our price prediction graph.
FSD-ORD
FSD-MLI
ATY-ORD
FSD-PIA
RAP-MDW
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 South Dakota to Illinois
USSD-USIL
FSD-ORD
FSD-MLI
ATY-ORD
FSD-PIA
What is the cheapest month to book a flight from South Dakota to Illinois?
Currently, January is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $258). Flying from South Dakota to Illinois in September is currently the most expensive (average of $394). 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 SD to IL?
Find hourly flight availability from South Dakota 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 October 9, 2026.
It’s typically best to fly out from South Dakota to Illinois in the morning. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, which is usually more expensive.
Weekly flight availability from South Dakota to Illinois
Explore weekly flight availability from South Dakota 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 October 9, 2026.
The most flights from USSD to USIL are scheduled on a Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).
How much does it cost to fly round-trip from South Dakota to Illinois?
Airfare is below average for this route at the moment.
South Dakota to Illinois flights typically cost between $329 and $607 in November.The cheapest round-trip price found within the last 5 days was $299 on United Airlines (Nov 6-Nov 13).
How far ahead should I book a flight from South Dakota to Illinois?
The price you pay for your flight from South Dakota to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 45 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from South Dakota to Illinois?
Use this chart to determine the cheapest time to fly round-trip from South Dakota to Illinois. Price data was last updated on May 16, 2026.
Travelers seeking maximum savings on their South Dakota to Illinois flight should consider departing on Friday mornings 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 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 October 9, 2026.
Read through reviews of airlines operating flights from South Dakota to Illinois, such as Delta,United Airlines, andAmerican Airlines. 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.
Boarding
8.1
Food
7.2
Crew
8.5
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Food
7.2
Crew
8.5
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Food
7.2
Crew
8.5
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Boarding
8.1
Food
7.2
Crew
8.5
Entertainment
7.8
Overall
7.8
Comfort
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 South Dakota to Illinois. 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 South Dakota 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 South Dakota to Illinois by cabin class
Find flights from South Dakota to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
South Dakota and Illinois flights
Browse other South Dakota and Illinois flight options. Last updated on October 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to South Dakota after your stay in Illinois
South Dakota to Illinois flights
Consider these flights traveling from South Dakota to Illinois.
Top 2 airlines flying from South Dakota to Illinois
Discover the top 2 airlines that operate flights from South Dakota to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$187 | Average$335 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$204 | Average$351 | FlexibilityNo cancel fee | On-time69% |