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South Dakota

$99+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
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Cheap 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 April 17, 2026.

This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/112:58 pm
ORD
-
RAP
1 stop7h 33m
American Airlines
Wed 7/154:55 pm
RAP
-
ORD
1 stop6h 36m
American Airlines
Deal found 4/15$211
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Wed 5/278:45 am
ORD
-
RAP
Nonstop2h 39m
United Airlines
Sun 5/316:00 am
RAP
-
ORD
Nonstop2h 34m
United Airlines
Deal found 4/16$230
This American Airlines deal was found by Cheapflights users on 4/14. 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 8/2911:00 am
ORD
-
RAP
Nonstop2h 30m
American Airlines
Sat 9/56:10 pm
RAP
-
ORD
Nonstop2h 19m
American Airlines
Deal found 4/14$231
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Thu 5/73:44 pm
ORD
-
FSD
1 stop25h 37m
Multiple Airlines
Mon 5/116:11 pm
FSD
-
ORD
1 stop17h 08m
Multiple Airlines
Deal found 4/15$233
This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/178:45 am
ORD
-
RAP
Nonstop2h 39m
United Airlines
Mon 7/206:00 am
RAP
-
ORD
Nonstop2h 34m
United Airlines
Deal found 4/15$233
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/299:45 am
ORD
-
RAP
Nonstop2h 34m
American Airlines
Mon 6/15:00 pm
RAP
-
ORD
1 stop6h 42m
American Airlines
Deal found 4/14$243
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/812:54 pm
ORD
-
FSD
Nonstop1h 53m
American Airlines
Sun 5/1012:29 pm
FSD
-
ORD
Nonstop1h 55m
American Airlines
Deal found 4/14$249
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/710:02 am
ORD
-
FSD
Nonstop1h 57m
American Airlines
Sun 5/1012:29 pm
FSD
-
ORD
Nonstop1h 55m
American Airlines
Deal found 4/14$250
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Thu 5/212:20 pm
ORD
-
FSD
Nonstop1h 56m
American Airlines
Sat 5/304:46 pm
FSD
-
ORD
Nonstop2h 07m
American Airlines
Deal found 4/16$251
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Sat 5/169:11 pm
ORD
-
FSD
Nonstop1h 55m
American Airlines
Sat 5/234:46 pm
FSD
-
ORD
Nonstop2h 07m
American Airlines
Deal found 4/16$255
This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/178:45 am
ORD
-
RAP
Nonstop2h 39m
United Airlines
Fri 7/245:53 pm
RAP
-
ORD
1 stop5h 51m
United Airlines
Deal found 4/15$255
This American Airlines deal was found by Cheapflights users on 4/14. 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 5/212:20 pm
ORD
-
FSD
Nonstop1h 56m
American Airlines
Mon 5/255:35 pm
FSD
-
ORD
1 stop7h 07m
American Airlines
Deal found 4/14$259

Find 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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$211
(American Airlines)

One-way from

$99
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$299

Good round-trip deal

$289 or less

Good one-way deal

$205 or less
Provider with most accurate pricing for Chicago (CHI)-Sioux Falls Joe Foss Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Sioux Falls Joe Foss Field flights.
Search Deals
From Illinois to South Dakota
Search Deals
One-way flight from Illinois to South Dakota
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Illinois to South Dakota.
Search Deals
Price to beat on a one-way flight from Illinois to South Dakota.
Search Deals

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 April 17, 2026.
Use the filters below to find and compare flights from Illinois to South Dakota that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 6/5

7:40 pm-9:38 pm

Nonstop1h 58m

Sioux Falls Joe Foss Field

Sun 6/7

7:35 am-9:31 am

Nonstop1h 56m

$249

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Thu 7/23

8:45 am-10:24 am

Nonstop2h 39m

Rapid City

Mon 7/27

1:35 pm-4:59 pm

Nonstop2h 24m

$251

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Wed 9/16

5:40 am-11:46 am

1 stop6h 06m

Sioux Falls Joe Foss Field

Sat 9/19

7:30 am-2:45 pm

1 stop7h 15m

$271

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Sat 5/16

8:00 am-2:47 pm

1 stop6h 47m

Sioux Falls Joe Foss Field

Sat 5/23

5:35 pm-11:59 pm

1 stop6h 24m

$271

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Fri 5/1

7:16 pm-11:02 pm

1 stop3h 46m

Sioux Falls Joe Foss Field

Thu 5/7

1:35 pm-5:56 pm

1 stop4h 21m

$284

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Wed 4/29

2:35 pm-8:44 pm

1 stop7h 09m

Rapid City

Mon 5/4

9:30 am-12:56 pm

Nonstop2h 26m

$300

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Thu 8/27

5:10 am-10:43 am

1 stop5h 33m

Sioux Falls Joe Foss Field

Sun 8/30

7:40 am-12:49 pm

1 stop5h 09m

$309

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Fri 7/31

5:33 pm-10:07 pm

1 stop4h 34m

Sioux Falls Joe Foss Field

Sun 8/2

7:35 am-12:11 pm

1 stop4h 36m

$309

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Wed 5/20

2:00 pm-11:11 pm

2 stops9h 11m

Sioux Falls Joe Foss Field

Sun 5/24

9:15 am-2:57 pm

1 stop5h 42m

$318
Quickest round-trip

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Sat 5/9

8:00 pm-9:52 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Wed 5/13

6:42 pm-8:40 pm

Nonstop1h 58m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 60 resultsSorted by cheapest first
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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, June is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $169). Flying from Illinois to South Dakota in April is currently the most expensive (average of $209). 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 April 17, 2026.

One of the essential ways to save on airfare from Illinois to South Dakota is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 23% 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 April 4, 2026.

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 April 17, 2026.

The most flights from USIL to USSD are scheduled on a Wednesday (19 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).

How much does it cost to fly round-trip from Illinois to South Dakota?

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 April 17, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican 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
7.9
Good
8,406 reviews

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,406 reviews
Delta
7.9
Good
8,406 reviews

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,602 reviews
Delta
7.9
Good
8,406 reviews

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,593 reviews
Delta
7.9
Good
8,406 reviews

Food

7.2

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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?

    United Airlines, American Airlines, and Delta can get you from Illinois to South Dakota in just under 1h 58m. Your travel time can differ by up to 5h 38m. 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 United Airlines, which is currently one of the cheapest options available, starting at $138. American Airlines flights start at $138 while deals on Delta start at $279 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, June is the cheapest month in which you can book a flight from Illinois to South Dakota (average of $169). Flying from Illinois to South Dakota in April is currently the most expensive (average of $209). 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 3 airlines flying from Illinois to South Dakota

Discover the top 3 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 April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$382FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$365FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$333FlexibilityNo cancel feeOn-timeN/A

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