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South Dakota

$103+ 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
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 November 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(American Airlines)

One-way from

$103
(Kiwi.com)

Popular in

August

Cheapest in

September

Average price

$344

Good round-trip deal

$189 or less

Good one-way deal

$207 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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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 18, 2025.

This American Airlines deal was found by Cheapflights users on 11/17. 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 12/3010:08 pmORD - FSD
Nonstop1h 51mAmerican Airlines
Sun 1/47:29 pmFSD - ORD
Nonstop2h 01mAmerican Airlines
Deal found 11/17$189
This American Airlines deal was found by Cheapflights users on 11/18. 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 12/1111:35 amORD - FSD
Nonstop1h 57mAmerican Airlines
Sun 12/1410:43 amFSD - ORD
Nonstop1h 53mAmerican Airlines
Deal found 11/18$190
This Kiwi.com deal was found by Cheapflights users on 11/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:36 amORD - FSD
2 stops28h 55mFrontier
Sun 12/72:26 pmFSD - ORD
1 stop9h 46mFrontier
Deal found 11/18$192
This American Airlines deal was found by Cheapflights users on 11/16. 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 12/198:15 amORD - FSD
Nonstop2h 01mAmerican Airlines
Thu 1/17:29 pmFSD - ORD
Nonstop2h 01mAmerican Airlines
Deal found 11/16$194
This United Airlines deal was found by Cheapflights users on 11/16. 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 12/58:04 pmORD - FSD
Nonstop1h 46mUnited Airlines
Sun 12/76:08 pmFSD - ORD
Nonstop1h 57mUnited Airlines
Deal found 11/16$204
This Delta deal was found by Cheapflights users on 11/18. 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 12/116:00 amORD - FSD
1 stop6h 48mDelta
Sun 12/141:30 pmFSD - ORD
1 stop6h 25mDelta
Deal found 11/18$209
This Delta deal was found by Cheapflights users on 11/18. 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 12/115:13 pmMDW - FSD
1 stop6h 01mDelta
Sun 12/148:01 amFSD - MDW
1 stop5h 09mDelta
Deal found 11/18$209
This United Airlines deal was found by Cheapflights users on 11/16. 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 12/28:04 pmORD - FSD
Nonstop1h 46mUnited Airlines
Sat 12/68:00 amFSD - ORD
Nonstop1h 53mUnited Airlines
Deal found 11/16$219
This Delta deal was found by Cheapflights users on 11/15. 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 12/36:00 amORD - FSD
1 stop4h 20mDelta
Wed 12/105:14 amFSD - ORD
1 stop6h 26mDelta
Deal found 11/15$224
This Delta deal was found by Cheapflights users on 11/17. 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 12/245:59 pmMDW - FSD
1 stop5h 09mDelta
Sat 1/37:00 amFSD - MDW
1 stop4h 06mDelta
Deal found 11/17$224
This Kiwi.com deal was found by Cheapflights users on 11/15. 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.
Sat 12/67:43 pmSTL - FSD
1 stop17h 48mMultiple Airlines
Wed 12/101:40 pmFSD - STL
1 stop22h 32mMultiple Airlines
Deal found 11/15$226
This Delta deal was found by Cheapflights users on 11/16. 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 12/62:30 pmORD - FSD
2 stops8h 42mDelta
Sun 12/75:14 amFSD - ORD
1 stop6h 26mDelta
Deal found 11/16$229

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 November 18, 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 1/23

7:30 pm-9:30 pm

Nonstop2h 00m

Sioux Falls Joe Foss Field

Thu 1/29

6:15 pm-8:13 pm

Nonstop1h 58m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 1/22

3:53 pm-5:45 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Sun 1/25

6:15 pm-8:13 pm

Nonstop1h 58m

$189

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

$194

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 12/5

8:04 pm-9:50 pm

Nonstop1h 46m

Sioux Falls Joe Foss Field

Sun 12/7

6:08 pm-8:05 pm

Nonstop1h 57m

$204

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Sat 12/6

8:04 pm-9:51 pm

Nonstop1h 47m

Sioux Falls Joe Foss Field

Sun 12/7

8:00 am-9:54 am

Nonstop1h 54m

$204

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 1/22

6:15 am-12:22 pm

1 stop6h 07m

Sioux Falls Joe Foss Field

Sun 1/25

5:00 am-11:47 am

1 stop6h 47m

$209

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 1/23

6:15 am-12:22 pm

1 stop6h 07m

Sioux Falls Joe Foss Field

Sun 1/25

5:00 am-11:47 am

1 stop6h 47m

$209

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Sat 3/7

5:00 pm-10:56 pm

1 stop5h 56m

Sioux Falls Joe Foss Field

Wed 3/11

1:20 pm-6:08 pm

1 stop4h 48m

$209

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 12/11

6:00 am-12:48 pm

1 stop6h 48m

Sioux Falls Joe Foss Field

Sun 12/14

5:14 am-1:50 pm

2 stops8h 36m

$214

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Thu 12/11

5:13 pm-11:14 pm

1 stop6h 01m

Sioux Falls Joe Foss Field

Sun 12/14

5:14 am-12:34 pm

2 stops7h 20m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

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, 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 November 18, 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 November 18, 2025.

The most flights from USIL to USSD are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 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 November 18, 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

Boarding

8.7

Comfort

8.9

Crew

9.4

Entertainment

8.1

Overall

8.7

Food

8.4
Denver Air Connection
8.7
Very good
Denver Air Connection
8.7
Very good

Boarding

8.7

Comfort

8.9

Crew

9.4

Entertainment

8.1

Overall

8.7

Food

8.4
Delta
7.9
Good
8,003 reviews
Denver Air Connection
8.7
Very good

Boarding

8.7

Comfort

8.9

Crew

9.4

Entertainment

8.1

Overall

8.7

Food

8.4
United Airlines
7.4
Good
9,019 reviews
Denver Air Connection
8.7
Very good

Boarding

8.7

Comfort

8.9

Crew

9.4

Entertainment

8.1

Overall

8.7

Food

8.4
American Airlines
7.2
Good
11,044 reviews
Denver Air Connection
8.7
Very good

Boarding

8.7

Comfort

8.9

Crew

9.4

Entertainment

8.1

Overall

8.7

Food

8.4

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?

    American Airlines, United Airlines, and Delta can get you from Illinois to South Dakota in just under 1h 46m. Your travel time can differ by up to 4h 10m. 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 $121. Allegiant Air flights start at $163 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

Browse thousands of different options on Cheapflights for your next trip

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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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$164Average$196FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$428FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$194Average$393FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$298FlexibilityNo cancel feeOn-timeN/A

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