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South Dakota

$72+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$144
(Priceline)

One-way from

$72
(Frontier)

Popular in

January

Cheapest in

September

Average price

$329

Good round-trip deal

$249 or less

Good one-way deal

$256 or less
Provider with most accurate pricing for Chicago (CHI)-Sioux Falls Joe Foss Field flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sioux Falls Joe Foss Field flights.
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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. 10% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 20, 2025.

This Priceline deal was found by Cheapflights users on 10/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:00 amORD - FSD
1 stop7h 33mFrontier
Thu 11/62:13 pmFSD - ORD
1 stop10h 02mFrontier
Deal found 10/18$144
This Frontier deal was found by Cheapflights users on 10/19. 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.
Thu 11/136:00 amORD - FSD
1 stop7h 28mFrontier
Mon 11/172:32 pmFSD - ORD
1 stop9h 43mFrontier
Deal found 10/19$161
This Frontier deal was found by Cheapflights users on 10/19. 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.
Fri 10/2410:51 amORD - FSD
1 stop7h 42mFrontier
Sun 10/262:23 pmFSD - ORD
1 stop9h 30mFrontier
Deal found 10/19$168
This American Airlines deal was found by Cheapflights users on 10/18. 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 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 10/18$189
This American Airlines deal was found by Cheapflights users on 10/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/811:11 amORD - FSD
Nonstop2h 02mAmerican Airlines
Sun 11/97:16 pmFSD - ORD
Nonstop1h 58mAmerican Airlines
Deal found 10/18$190
This American Airlines deal was found by Cheapflights users on 10/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:04 pmORD - FSD
Nonstop1h 45mAmerican Airlines
Thu 1/17:29 pmFSD - ORD
Nonstop2h 01mAmerican Airlines
Deal found 10/20$193
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:06 pmORD - FSD
1 stop15h 40mMultiple Airlines
Mon 11/172:32 pmFSD - ORD
2 stops20h 42mMultiple Airlines
Deal found 10/20$201
This Delta deal was found by Cheapflights users on 10/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:00 amORD - FSD
1 stop6h 48mDelta
Sat 12/201:25 pmFSD - ORD
1 stop4h 59mDelta
Deal found 10/18$209
This Delta deal was found by Cheapflights users on 10/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/161:50 pmMDW - FSD
1 stop5h 50mDelta
Sat 12/2011:06 amFSD - MDW
1 stop6h 13mDelta
Deal found 10/18$209
This Delta deal was found by Cheapflights users on 10/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amORD - RAP
1 stop5h 22mDelta
Tue 12/96:05 amRAP - ORD
1 stop4h 35mDelta
Deal found 10/18$229
This Delta deal was found by Cheapflights users on 10/19. 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.
Thu 12/49:59 amMDW - RAP
1 stop5h 10mDelta
Tue 12/911:02 amRAP - MDW
1 stop6h 16mDelta
Deal found 10/19$229
This American Airlines deal was found by Cheapflights users on 10/19. 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 11/134:49 pmORD - FSD
Nonstop1h 56mAmerican Airlines
Mon 11/175:27 pmFSD - ORD
1 stop6h 10mAmerican Airlines
Deal found 10/19$230

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 October 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

Thu 11/13

6:00 am-1:28 pm

1 stop7h 28m

Sioux Falls Joe Foss Field

Mon 11/17

2:32 pm-12:15 am

1 stop9h 43m

$144

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 12/4

7:00 am-1:31 pm

1 stop6h 31m

Sioux Falls Joe Foss Field

Thu 12/11

2:26 pm-12:12 am

1 stop9h 46m

$144

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 10/24

10:51 am-6:33 pm

1 stop7h 42m

Sioux Falls Joe Foss Field

Mon 10/27

7:28 pm-12:59 am

1 stop5h 31m

$168

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 1/1

12:35 pm-2:27 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Sat 1/3

6:16 pm-8:20 pm

Nonstop2h 04m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 11/21

8:00 pm-9:46 pm

Nonstop1h 46m

Sioux Falls Joe Foss Field

Sun 11/23

6:23 pm-8:20 pm

Nonstop1h 57m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 11/13

4:49 pm-6:45 pm

Nonstop1h 56m

Sioux Falls Joe Foss Field

Mon 11/17

7:16 pm-9:14 pm

Nonstop1h 58m

$190

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 12/19

8:15 am-10:16 am

Nonstop2h 01m

Sioux Falls Joe Foss Field

Thu 1/1

7:29 pm-9:30 pm

Nonstop2h 01m

$193

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 11/13

6:06 pm-9:46 am

1 stop15h 40m

Sioux Falls Joe Foss Field

Mon 11/17

2:32 pm-11:14 am

2 stops20h 42m

$201

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Tue 12/16

6:00 am-12:48 pm

1 stop6h 48m

Sioux Falls Joe Foss Field

Sat 12/20

1:25 pm-6:24 pm

1 stop4h 59m

$209

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Tue 12/16

1:50 pm-7:40 pm

1 stop5h 50m

Sioux Falls Joe Foss Field

Sat 12/20

11:06 am-5:19 pm

1 stop6h 13m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 54 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, January is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $189). Flying from Illinois to South Dakota in April is currently the most expensive (average of $223). 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 October 20, 2025.

One of the essential ways to save on airfare from Illinois to South Dakota is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 45% on airfare.

What is the cheapest day to fly from Illinois to South Dakota?

Use this chart to determine the cheapest time to fly round-trip from Illinois to South Dakota. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to South Dakota flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 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 (13 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 October 20, 2025.
Read reviews from past customers who have flown Denver Air Connection, Delta, and United 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.
Denver Air Connection
8.7
Very good

Comfort

8.9

Crew

9.4

Entertainment

8.1

Boarding

8.7

Food

8.4

Overall

8.7
Denver Air Connection
8.7
Very good
Denver Air Connection
8.7
Very good

Comfort

8.9

Crew

9.4

Entertainment

8.1

Boarding

8.7

Food

8.4

Overall

8.7
Delta
7.9
Good
7,977 reviews
Denver Air Connection
8.7
Very good

Comfort

8.9

Crew

9.4

Entertainment

8.1

Boarding

8.7

Food

8.4

Overall

8.7
United Airlines
7.4
Good
8,988 reviews
Denver Air Connection
8.7
Very good

Comfort

8.9

Crew

9.4

Entertainment

8.1

Boarding

8.7

Food

8.4

Overall

8.7
American Airlines
7.2
Good
11,024 reviews
Denver Air Connection
8.7
Very good

Comfort

8.9

Crew

9.4

Entertainment

8.1

Boarding

8.7

Food

8.4

Overall

8.7

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, United Airlines, and Delta can get you from Illinois to South Dakota in just under 1h 52m. Your travel time can differ by up to 5h 36m. There are 461 mi between Illinois and South Dakota. This flight may include one or multiple stops.

  • 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 $104. United Airlines flights start at $176 while deals on Delta start at $186 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, January is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $189). Flying from Illinois to South Dakota in April is currently the most expensive (average of $223). 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

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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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$164Average$196FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$316FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$199Average$394FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$298FlexibilityNo cancel feeOn-timeN/A

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