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South Dakota

$104+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
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 January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$104
(Flightnetwork)

Popular in

June

Cheapest in

September

Average price

$244

Good round-trip deal

$189 or less

Good one-way deal

$271 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. 5% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 15, 2026.

This United Airlines deal was found by Cheapflights users on 1/15. 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 2/67:58 pm
ORD
-
FSD
Nonstop1h 52m
United Airlines
Sun 2/87:30 am
FSD
-
ORD
Nonstop2h 02m
United Airlines
Deal found 1/15$189
This United Airlines deal was found by Cheapflights users on 1/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:57 pm
ORD
-
FSD
Nonstop1h 50m
United Airlines
Sat 7/187:45 am
FSD
-
ORD
Nonstop1h 48m
United Airlines
Deal found 1/14$197
This United Airlines deal was found by Cheapflights users on 1/13. 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.
Mon 2/27:58 pm
ORD
-
FSD
Nonstop1h 52m
United Airlines
Mon 2/236:45 pm
FSD
-
ORD
Nonstop1h 50m
United Airlines
Deal found 1/13$204
This American Airlines deal was found by Cheapflights users on 1/13. 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 9/2410:00 pm
ORD
-
FSD
Nonstop1h 51m
American Airlines
Sun 9/277:19 am
FSD
-
ORD
Nonstop1h 51m
American Airlines
Deal found 1/13$209
This American Airlines deal was found by Cheapflights users on 1/14. 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 8/294:20 pm
ORD
-
RAP
Nonstop2h 20m
American Airlines
Sat 9/56:10 pm
RAP
-
ORD
Nonstop2h 19m
American Airlines
Deal found 1/14$209
This Delta deal was found by Cheapflights users on 1/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/56:15 am
ORD
-
FSD
1 stop4h 07m
Delta
Sun 2/81:07 pm
FSD
-
ORD
2 stops10h 48m
Delta
Deal found 1/14$214
This Delta deal was found by Cheapflights users on 1/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:00 pm
MDW
-
FSD
2 stops9h 46m
Delta
Sun 8/25:15 am
FSD
-
MDW
1 stop3h 23m
Delta
Deal found 1/14$214
This United Airlines deal was found by Cheapflights users on 1/12. 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 5/82:18 pm
ORD
-
RAP
1 stop7h 25m
United Airlines
Mon 5/1112:10 pm
RAP
-
ORD
Nonstop2h 13m
United Airlines
Deal found 1/12$215
This American Airlines deal was found by Cheapflights users on 1/14. 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.
Tue 4/149:46 am
ORD
-
RAP
1 stop7h 37m
American Airlines
Sat 4/1811:44 am
RAP
-
ORD
Nonstop2h 26m
American Airlines
Deal found 1/14$219
This United Airlines deal was found by Cheapflights users on 1/13. 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 3/188:10 pm
ORD
-
FSD
Nonstop1h 52m
United Airlines
Sun 3/226:35 pm
FSD
-
ORD
Nonstop1h 50m
United Airlines
Deal found 1/13$222
This Delta deal was found by Cheapflights users on 1/15. 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.
Fri 2/61:58 pm
ORD
-
FSD
2 stops9h 06m
Delta
Sun 2/84:18 pm
FSD
-
ORD
1 stop5h 12m
Delta
Deal found 1/15$229
This Delta deal was found by Cheapflights users on 1/15. 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.
Fri 2/67:16 pm
MDW
-
RAP
1 stop4h 12m
Delta
Mon 2/910:54 am
RAP
-
MDW
1 stop6h 42m
Delta
Deal found 1/15$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 January 15, 2026.
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 4/2

7:58 pm-9:49 pm

Nonstop1h 51m

Sioux Falls Joe Foss Field

Tue 4/7

6:35 pm-8:32 pm

Nonstop1h 57m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 2/6

3:53 pm-5:45 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Sun 2/8

6:15 pm-8:13 pm

Nonstop1h 58m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 3/12

8:10 pm-10:02 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Mon 3/16

6:35 pm-8:25 pm

Nonstop1h 50m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 2/6

7:58 pm-9:50 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Sun 2/8

7:30 am-9:32 am

Nonstop2h 02m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 3/13

8:10 pm-10:02 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Mon 3/16

6:35 pm-8:25 pm

Nonstop1h 50m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 2/5

6:15 am-10:22 am

1 stop4h 07m

Sioux Falls Joe Foss Field

Sun 2/8

1:07 pm-11:55 pm

2 stops10h 48m

$214

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Tue 4/14

9:46 am-4:23 pm

1 stop7h 37m

Rapid City

Sat 4/18

11:44 am-3:10 pm

Nonstop2h 26m

$219

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Fri 2/6

6:15 am-10:22 am

1 stop4h 07m

Sioux Falls Joe Foss Field

Sun 2/8

4:18 pm-9:30 pm

1 stop5h 12m

$224

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 4/2

6:00 am-10:21 am

1 stop4h 21m

Sioux Falls Joe Foss Field

Tue 4/7

1:34 pm-7:49 pm

1 stop6h 15m

$229

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Sat 2/14

6:15 am-10:05 am

1 stop4h 50m

Rapid City

Tue 2/17

4:29 pm-9:30 pm

1 stop4h 01m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

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, February 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 $218). 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 January 15, 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 in the evening tend to be the most expensive. A flight at noon could potentially save you up to 33% 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 January 10, 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 January 15, 2026.

The most flights from USIL to USSD are scheduled on a Monday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 January 15, 2026.
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

Entertainment

8.1

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Crew

9.4
Denver Air Connection
8.7
Very good
Denver Air Connection
8.7
Very good

Entertainment

8.1

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Crew

9.4
Delta
7.9
Good
8,051 reviews
Denver Air Connection
8.7
Very good

Entertainment

8.1

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Crew

9.4
United Airlines
7.4
Good
9,164 reviews
Denver Air Connection
8.7
Very good

Entertainment

8.1

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Crew

9.4
American Airlines
7.2
Good
11,136 reviews
Denver Air Connection
8.7
Very good

Entertainment

8.1

Food

8.4

Comfort

8.9

Boarding

8.7

Overall

8.7

Crew

9.4

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?

    United Airlines, American Airlines, and Delta can get you from Illinois to South Dakota in just under 1h 51m. Your travel time can differ by up to 2h 59m. There are 461 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, February 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 $218). 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 January 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$164Average$182FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$277FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$194Average$392FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$298FlexibilityNo cancel feeOn-timeN/A

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