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South Dakota

$69+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$189
(United Airlines)

One-way from

$69
(Priceline)

Popular in

January

Cheapest in

March

Average price

$293

Good round-trip deal

$189 or less

Good one-way deal

$144 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. 13% potential increase in price ($45 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 July 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 July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/23:34 pmORD - FSD
Nonstop1h 53mAmerican Airlines
Sat 8/96:03 pmFSD - ORD
Nonstop1h 46mAmerican Airlines
Deal found 7/3$189
This Priceline deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1812:35 pmMDW - FSD
1 stop6h 02mFrontier
Thu 7/242:57 pmFSD - MDW
1 stop5h 57mFrontier
Deal found 7/2$190
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/268:30 pmORD - FSD
Nonstop1h 52mUnited Airlines
Fri 10/248:00 amFSD - ORD
Nonstop1h 51mUnited Airlines
Deal found 7/3$192
This Priceline deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 7/175:40 amORD - FSD
1 stop8h 22mFrontier
Thu 7/312:57 pmFSD - ORD
1 stop9h 13mFrontier
Deal found 7/1$207
This Delta deal was found by Cheapflights users on 7/3. 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.
Sat 9/208:52 amORD - FSD
1 stop3h 19mDelta
Sun 9/215:00 amFSD - ORD
1 stop3h 25mDelta
Deal found 7/3$209
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/167:17 pmMDW - FSD
1 stop4h 27mDelta
Sat 8/2310:59 amFSD - MDW
1 stop6h 38mDelta
Deal found 7/2$209
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/147:59 pmSTL - FSD
1 stop4h 29mAmerican Airlines
Sun 8/175:15 pmFSD - STL
1 stop5h 48mAmerican Airlines
Deal found 7/2$229
This American Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/284:21 pmORD - RAP
Nonstop2h 21mAmerican Airlines
Sat 9/61:45 pmRAP - ORD
Nonstop2h 25mAmerican Airlines
Deal found 7/1$239
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 9/262:17 pmORD - RAP
1 stop5h 23mUnited Airlines
Wed 10/15:50 pmRAP - ORD
1 stop5h 09mUnited Airlines
Deal found 7/1$240
This Delta deal was found by Cheapflights users on 7/3. 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 8/215:30 pmSTL - RAP
1 stop6h 02mDelta
Thu 8/284:25 pmRAP - STL
1 stop5h 59mDelta
Deal found 7/3$249
This Mytrip deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:00 amORD - FSD
1 stop8h 47mMultiple Airlines
Mon 10/206:11 pmFSD - ORD
2 stops23h 26mMultiple Airlines
Deal found 7/1$250
This Mytrip deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:00 amORD - RAP
1 stop14h 40mMultiple Airlines
Sun 8/318:30 pmRAP - ORD
1 stop7h 20mMultiple Airlines
Deal found 6/30$262

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 July 3, 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

Sat 8/2

3:34 pm-5:27 pm

Nonstop1h 53m

Sioux Falls Joe Foss Field

Sat 8/9

6:03 pm-7:49 pm

Nonstop1h 46m

$189

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Fri 7/18

12:35 pm-6:37 pm

1 stop6h 02m

Sioux Falls Joe Foss Field

Thu 7/24

2:57 pm-8:54 pm

1 stop5h 57m

$190

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 9/26

8:30 pm-10:22 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Fri 10/24

8:00 am-9:51 am

Nonstop1h 51m

$192

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 7/17

5:40 am-2:02 pm

1 stop8h 22m

Sioux Falls Joe Foss Field

Thu 7/31

2:57 pm-12:10 am

1 stop9h 13m

$207

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Sat 9/20

8:52 am-12:11 pm

1 stop3h 19m

Sioux Falls Joe Foss Field

Sun 9/21

5:00 am-8:25 am

1 stop3h 25m

$209

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Sat 8/16

7:17 pm-11:44 pm

1 stop4h 27m

Sioux Falls Joe Foss Field

Sat 8/23

10:59 am-5:37 pm

1 stop6h 38m

$209

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Thu 8/14

7:59 pm-12:28 am

1 stop4h 29m

Sioux Falls Joe Foss Field

Sun 8/17

5:15 pm-11:03 pm

1 stop5h 48m

$229

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Thu 8/28

4:21 pm-5:42 pm

Nonstop2h 21m

Rapid City

Sun 8/31

6:05 pm-9:25 pm

Nonstop2h 20m

$239

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Fri 9/26

2:17 pm-6:40 pm

1 stop5h 23m

Rapid City

Wed 10/1

5:50 pm-11:59 pm

1 stop5h 09m

$240

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 8/21

5:30 pm-10:32 pm

1 stop6h 02m

Rapid City

Thu 8/28

4:25 pm-11:24 pm

1 stop5h 59m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 51 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 July 3, 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 July 3, 2025.

The most flights from USIL to USSD are scheduled on a Tuesday (15 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (4 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 July 3, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and Allegiant Air 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

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

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

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

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!
Allegiant Air
7.3
Good
708 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

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

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

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!
Frontier
5.9
Fair
3,286 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

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.

  • What are the cheapest airlines to fly from Illinois to South Dakota one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $69. American Airlines flights start at $175 while deals on Delta start at $181 one-way.

  • 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$152Average$188FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$179Average$273FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$207Average$368FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$378FlexibilityNo cancel feeOn-timeN/A

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