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South Dakota

$75+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap 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 20, 2025.

Round-trip from

$148
(Priceline)

One-way from

$75
(Priceline)

Popular in

January

Cheapest in

March

Average price

$269

Good round-trip deal

$219 or less

Good one-way deal

$258 or less
From Illinois to South Dakota
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One-way flight from Illinois to South Dakota
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Highest demand for flights based on searches. 14% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Illinois to South Dakota.
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Price to beat on a one-way flight from Illinois to South Dakota.
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Find flight deals from Illinois to South Dakota

Cheapest flights from Illinois to South Dakota
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 20, 2025.

This Priceline deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:00 amORD - FSD
1 stop7h 47mFrontier
Sun 11/22:23 pmFSD - ORD
1 stop9h 49mFrontier
Deal found 8/19$148
This Priceline deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:50 amORD - FSD
1 stop7h 34mFrontier
Sun 10/192:23 pmFSD - ORD
1 stop9h 30mFrontier
Deal found 8/19$149
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:50 amORD - FSD
1 stop7h 34mFrontier
Mon 10/207:28 pmFSD - ORD
1 stop5h 31mFrontier
Deal found 8/18$165
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1710:51 amORD - FSD
1 stop7h 42mFrontier
Sun 10/192:23 pmFSD - ORD
1 stop9h 30mFrontier
Deal found 8/18$171
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:24 pmMDW - FSD
1 stop24h 09mFrontier
Mon 10/207:28 pmFSD - MDW
1 stop4h 56mFrontier
Deal found 8/18$173
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:24 pmMDW - FSD
1 stop24h 09mFrontier
Sun 10/192:23 pmFSD - MDW
1 stop10h 13mFrontier
Deal found 8/18$178
This Priceline deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:20 amORD - FSD
1 stop6h 52mFrontier
Fri 8/222:08 pmFSD - ORD
1 stop10h 24mFrontier
Deal found 8/19$188
This American Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 11/208:29 amORD - FSD
Nonstop1h 58mAmerican Airlines
Mon 11/247:16 pmFSD - ORD
Nonstop1h 58mAmerican Airlines
Deal found 8/19$189
This Frontier deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 9/67:55 pmSTL - FSD
1 stop18h 14mFrontier
Mon 9/152:54 pmFSD - STL
1 stop18h 12mFrontier
Deal found 8/19$189
This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 9/207:15 pmMDW - FSD
1 stop3h 29mDelta
Sun 9/215:00 amFSD - MDW
1 stop3h 49mDelta
Deal found 8/19$189
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” 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 9/202:25 pmORD - FSD
2 stops8h 19mDelta
Sun 9/215:00 amFSD - ORD
1 stop3h 25mDelta
Deal found 8/20$194
This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” 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 9/57:17 pmMDW - FSD
1 stop4h 29mDelta
Sat 9/1312:56 pmFSD - MDW
1 stop4h 39mDelta
Deal found 8/19$194

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 20, 2025.
Use the filters below to find and compare flights from Illinois to South Dakota that are best for you.

Fly from

Illinois

Fly to

South Dakota

Route

Depart

Return

Price

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 10/31

6:00 am-1:47 pm

1 stop7h 47m

Sioux Falls Joe Foss Field

Sun 11/2

2:23 pm-12:12 am

1 stop9h 49m

$148

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 10/16

6:50 am-2:24 pm

1 stop7h 34m

Sioux Falls Joe Foss Field

Sun 10/19

2:23 pm-11:53 pm

1 stop9h 30m

$149

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 10/16

6:50 am-2:24 pm

1 stop7h 34m

Sioux Falls Joe Foss Field

Mon 10/20

7:28 pm-12:59 am

1 stop5h 31m

$165

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 10/17

10:51 am-6:33 pm

1 stop7h 42m

Sioux Falls Joe Foss Field

Mon 10/20

7:28 pm-12:59 am

1 stop5h 31m

$165

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 11/14

6:00 am-1:47 pm

1 stop7h 47m

Sioux Falls Joe Foss Field

Sun 11/16

2:23 pm-12:15 am

1 stop9h 52m

$171

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 10/17

10:51 am-6:33 pm

1 stop7h 42m

Sioux Falls Joe Foss Field

Sun 10/19

2:23 pm-11:53 pm

1 stop9h 30m

$171

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Thu 10/16

6:24 pm-6:33 pm

1 stop24h 09m

Sioux Falls Joe Foss Field

Mon 10/20

7:28 pm-12:24 am

1 stop4h 56m

$173

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Thu 10/16

6:24 pm-6:33 pm

1 stop24h 09m

Sioux Falls Joe Foss Field

Sun 10/19

2:23 pm-12:36 am

1 stop10h 13m

$178

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Sat 9/20

5:15 pm-10:44 pm

1 stop5h 29m

Sioux Falls Joe Foss Field

Sun 9/21

5:00 am-8:25 am

1 stop3h 25m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 9/19

8:20 pm-10:12 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Mon 9/22

6:11 pm-8:10 pm

Nonstop1h 59m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 60 results
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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.
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

What is the cheapest month to book a flight from Illinois to South Dakota?

Currently, September is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $334). Flying from Illinois to South Dakota in December is currently the most expensive (average of $446). 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 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to South Dakota as you normally would.

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 20, 2025.

The most flights from USIL to USSD are scheduled on a Monday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

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 20, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American 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.
Delta
8.0
Very good
7,982 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,928 reviews
Delta
8.0
Very good
7,982 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • How long is the flight from Illinois to South Dakota?

    Frontier, Delta, and United Airlines can get you from Illinois to South Dakota in just under 2h 28m. Your travel time can differ by up to 5h 19m. There are 777 mi between Illinois and South Dakota. This flight may include one or multiple stops.

  • Can I find deals for flights from Illinois to South Dakota that include hotel bookings?

    Yes. In addition to deals on Illinois to South Dakota flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to South Dakota?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to South Dakota.

  • Can I find deals for business class flights from Illinois to South Dakota?

    Yes. Cheapflights offers flight deals from Illinois to South Dakota by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to South Dakota?

    Currently, September is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $334). Flying from Illinois to South Dakota in December is currently the most expensive (average of $446). 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.

See more FAQs

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Alternative routes for Illinois to South Dakota

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Illinois to South Dakota

Discover the top 4 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 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$164Average$188FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$312FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$207Average$394FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$298FlexibilityNo cancel feeOn-timeN/A

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