$141+ Cheap flights from Rapid City (RAP) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ORD
Oct 14 — Oct 211
Round-trip
1 adult, Economy
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Find cheap flights from Rapid City 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 Rapid City to IllinoisExplore the most affordable flight options available from Rapid City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
Explore the most affordable flight options available from Rapid City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
This United Airlines deal was found by Cheapflights users on 9/10. 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 12/36:00 am -
Nonstop2h 34m
Tue 12/87:50 pm -
Nonstop2h 52m
Deal found 9/10![United Airlines logo]()
$290
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 10/2112:30 pm -
1 stop6h 00m
Wed 10/288:40 am -
Nonstop2h 51m
Deal found 9/9![United Airlines logo]()
$291
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/26:07 pm -
Nonstop2h 38m
Sun 10/44:00 pm -
Nonstop2h 37m
Deal found 9/10![American Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 10/135:53 pm -
1 stop5h 06m
Mon 10/198:47 am -
Nonstop2h 28m
Deal found 9/9![United Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 9/9. 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 10/134:38 pm -
1 stop3h 49m
Sat 10/179:59 am -
1 stop6h 59m
Deal found 9/9![Delta logo]()
$301
This Delta deal was found by Cheapflights users on 9/9. 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 10/134:38 pm -
1 stop3h 49m
Mon 10/196:20 am -
1 stop5h 25m
Deal found 9/9![Delta logo]()
$310
This Delta deal was found by Cheapflights users on 9/9. 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.
Sat 10/316:39 am -
1 stop4h 08m
Mon 11/212:27 pm -
1 stop4h 31m
Deal found 9/9![Delta logo]()
$310
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:38 pm -
1 stop5h 43m
Wed 10/2812:28 pm -
1 stop4h 30m
Deal found 9/10![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 10/231:37 pm -
Nonstop2h 24m
Tue 10/2710:55 am -
1 stop7h 14m
Deal found 9/12![United Airlines logo]()
$320
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:45 am -
1 stop4h 03m
Sat 11/216:23 am -
1 stop5h 00m
Deal found 9/13![Delta logo]()
$321
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1411:29 am -
1 stop4h 10m
Wed 11/1810:34 am -
1 stop6h 20m
Deal found 9/13![Delta logo]()
$321
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/245:04 pm -
1 stop5h 38m
Wed 10/2811:32 am -
2 stops11h 07m
Deal found 9/10![American Airlines logo]()
$324
Best flights from Rapid City to IllinoisDiscover carefully curated flight deals from Rapid City to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
Discover carefully curated flight deals from Rapid City to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 14, 2026.
This Delta deal was found by Cheapflights users on 9/9. 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.
Thu 1/74:00 pm -
1 stop4h 37m
Sat 1/96:00 am -
1 stop6h 12m
Deal found 9/9![Delta logo]()
$310
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/11:37 pm -
Nonstop2h 24m
Tue 10/68:47 am -
Nonstop2h 28m
Deal found 9/11![United Airlines logo]()
$319
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:51 pm -
1 stop8h 19m
Thu 11/56:00 am -
1 stop7h 39m
Deal found 9/13![American Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 9/9. 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.
Sat 10/316:39 am -
1 stop4h 08m
Mon 11/212:27 pm -
1 stop4h 31m
Deal found 9/9![Delta logo]()
$310
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:38 pm -
1 stop5h 43m
Wed 10/2812:28 pm -
1 stop4h 30m
Deal found 9/10![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:10 pm -
1 stop6h 49m
Sat 10/318:40 am -
Nonstop2h 51m
Deal found 9/13![United Airlines logo]()
$391
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:45 am -
1 stop4h 05m
Fri 11/2010:34 am -
1 stop4h 09m
Deal found 9/13![Delta logo]()
$350
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 10/231:37 pm -
Nonstop2h 24m
Sun 10/258:40 am -
Nonstop2h 37m
Deal found 9/12![United Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 10/287:00 am -
1 stop4h 38m
Sat 10/314:39 pm -
1 stop5h 04m
Deal found 9/10![United Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:26 am -
1 stop5h 39m
Sun 10/258:40 am -
Nonstop2h 37m
Deal found 9/13![United Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:45 am -
1 stop4h 05m
Tue 11/2412:30 pm -
1 stop11h 07m
Deal found 9/13![Delta logo]()
$486
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 10/131:37 pm -
Nonstop2h 24m
Sat 10/178:47 am -
Nonstop2h 28m
Deal found 9/9![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 9/9. 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.
Fri 10/306:39 am -
1 stop4h 08m
Sun 11/15:31 pm -
1 stop5h 59m
Deal found 9/9![Delta logo]()
$531
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:45 am -
1 stop4h 05m
Wed 11/1810:34 am -
1 stop4h 09m
Deal found 9/10![Delta logo]()
$549
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:29 am -
1 stop4h 18m
Fri 10/3010:12 am -
1 stop6h 46m
Deal found 9/10![Delta logo]()
$577
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:48 am -
1 stop5h 32m
Sun 10/47:13 pm -
1 stop4h 05m
Deal found 9/13![Delta logo]()
$619
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/411:21 am -
1 stop4h 29m
Sun 12/69:37 am -
2 stops7h 16m
Deal found 9/10![Delta logo]()
$644
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:39 am -
2 stops10h 21m
Sun 10/2512:27 pm -
1 stop4h 31m
Deal found 9/10![Delta logo]()
$753
Last-minute flights from Rapid City to IllinoisDiscover last-minute flight deals from Rapid City to Illinois. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Rapid City to Illinois. Data last updated September 14, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 9/3012:47 pm -
1 stop6h 43m
Sat 10/34:00 pm -
Nonstop2h 37m
Deal found 9/10![American Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 9/10. 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 10/26:07 pm -
Nonstop2h 38m
Sun 10/44:00 pm -
Nonstop2h 37m
Deal found 9/10![American Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 10/135:53 pm -
1 stop5h 06m
Mon 10/198:47 am -
Nonstop2h 28m
Deal found 9/9![United Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 9/9. 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 10/134:38 pm -
1 stop3h 49m
Sat 10/179:59 am -
1 stop6h 59m
Deal found 9/9![Delta logo]()
$301
This Delta deal was found by Cheapflights users on 9/9. 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 10/134:38 pm -
1 stop3h 49m
Mon 10/196:20 am -
1 stop5h 25m
Deal found 9/9![Delta logo]()
$310
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 10/2112:30 pm -
1 stop6h 00m
Wed 10/288:40 am -
Nonstop2h 51m
Deal found 9/9![United Airlines logo]()
$291
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Wed 10/215:04 pm -
1 stop5h 55m
Sun 10/256:55 am -
1 stop6h 26m
Deal found 9/8![American Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 9/11. 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 10/215:04 pm -
1 stop5h 55m
Wed 10/286:00 am -
1 stop7h 21m
Deal found 9/11![American Airlines logo]()
$321
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/2312:51 pm -
1 stop8h 19m
Sun 10/256:00 am -
1 stop7h 21m
Deal found 9/11![American Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:38 pm -
1 stop5h 43m
Wed 10/2812:28 pm -
1 stop4h 30m
Deal found 9/10![Delta logo]()
$319
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/245:04 pm -
1 stop5h 38m
Wed 10/2811:32 am -
2 stops11h 07m
Deal found 9/10![American Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 9/9. 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.
Sat 10/316:39 am -
1 stop4h 08m
Mon 11/212:27 pm -
1 stop4h 31m
Deal found 9/9![Delta logo]()
$310
One-way flights from Rapid City to IllinoisSearch for one-way flight options from Rapid City to Illinois. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
Search for one-way flight options from Rapid City to Illinois. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 10/211:37 pm -
Nonstop2h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$141
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 10/215:04 pm -
1 stop5h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![American Airlines logo]()
$151
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 11/85:00 am -
1 stop5h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sun 10/185:35 pm -
2 stops35h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/199:19 pm -
2 stops32h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 12/1111:07 am -
1 stop23h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Sun 10/115:35 pm -
2 stops35h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sun 11/812:06 pm -
1 stop16h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Fri 12/1111:07 am -
2 stops32h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$255
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:39 am -
1 stop4h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Delta logo]()
$261
This Delta deal was found by Cheapflights users on 9/12. 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 12/36:42 am -
1 stop4h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Delta logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Thu 12/109:48 pm -
2 stops41h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$300
Find flight deals from Rapid City to Illinois
Keep the following information in mind while searching for Rapid City to Illinois flight deals. Data was last updated September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $290 (United Airlines) |
One-way from | $141 (United Airlines) |
Popular in | January |
Cheapest in | June |
Average price | $324 |
Good round-trip deal | $465 or less |
Good one-way deal | $376 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Rapid City to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 14, 2026.
Use the filters below to find and compare flights from Rapid City 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 12/8
6:00 am-9:34 am
Nonstop2h 34m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$241
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Tue 11/10
11:28 am-4:41 pm
1 stop4h 13m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$251
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Wed 10/28
4:38 pm-9:27 pm
1 stop3h 49m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$261
Rapid CityChicago
RAP Rapid City - MDW Chicago Midway
RAPMDW
Rapid City
Tue 12/1
11:21 am-4:50 pm
1 stop4h 29m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$261
Quickest round-trip
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Sun 10/11
1:37 pm-5:01 pm
Nonstop2h 24m
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
Fri 11/13
1:30 pm-5:03 pm
Nonstop2h 33m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$279
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Wed 10/7
4:38 pm-9:27 pm
1 stop3h 49m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$289
Rapid CityChicago
RAP Rapid City - MDW Chicago Midway
RAPMDW
Rapid City
Thu 12/3
6:42 am-11:59 am
1 stop4h 17m
Chicago Midway
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$289
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Tue 10/13
11:29 am-4:40 pm
1 stop4h 11m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$300
Rapid CityChicago
RAP Rapid City - ORD Chicago O'Hare Intl
RAPORD
Rapid City
Sun 11/15
1:30 pm-5:03 pm
Nonstop2h 33m
Chicago O'Hare Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$307
Showing 1-10 of 35 resultsSorted by cheapest first
Best time to book a flight from Rapid City to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Rapid City with our price prediction graph.
RAP-ORD
RAP-MDW
RAP-STL
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 Rapid City to Illinois
RAP-USIL
RAP-ORD
RAP-MDW
RAP-STL
What is the cheapest month to book a flight from Rapid City to Illinois?
Currently, April is the cheapest month in which you can book a flight from Rapid City to Illinois (average of $209). Flying from Rapid City to Illinois in January is currently the most expensive (average of $536). 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 RAP to IL?
Find hourly flight availability from Rapid City to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 14, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Rapid City to Illinois as you normally would.
Weekly flight availability from Rapid City to Illinois
Explore weekly flight availability from Rapid City to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 14, 2026.
The most flights from RAP to USIL are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).
How much does it cost to fly round-trip from Rapid City to Illinois?
Airfare is below average for this route at the moment.
Rapid City to Illinois flights typically cost between $308 and $525 in December.The cheapest round-trip price found within the last 5 days was $290 on United Airlines (Dec 3-Dec 8).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated September 14, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican Airlines from Rapid City to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Overall
7.8
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Crew
8.5
Overall
7.8
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Crew
8.5
Overall
7.8
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Crew
8.5
Overall
7.8
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Related info for your journey
Find useful and relevant information for your journey from Rapid City 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 Rapid City 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 Rapid City to Illinois by cabin class
Find flights from Rapid City to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Rapid City and Illinois flights
Browse other Rapid City and Illinois flight options. Last updated on September 14, 2026.
Popular flight searches
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Rapid City to Illinois flights
Consider these flights traveling from Rapid City to Illinois.
Top 2 airlines flying from Rapid City to Illinois
Discover the top 2 airlines that operate flights from Rapid City to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$187 | Average$306 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$331 | FlexibilityNo cancel fee | On-time69% |