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South Dakota

$100+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$100
(American Airlines)

Popular in

January

Cheapest in

October

Average price

$334

Good round-trip deal

$170 or less

Good one-way deal

$121 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. 9% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 2, 2025.

This United Airlines deal was found by Cheapflights users on 4/1. 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 5/28:20 pmORD - FSD
Nonstop1h 52mUnited Airlines
Sun 5/46:35 pmFSD - ORD
Nonstop1h 50mUnited Airlines
Deal found 4/1$189
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Tue 7/84:08 pmORD - RAP
Nonstop2h 19mAmerican Airlines
Wed 7/1612:47 pmRAP - ORD
Nonstop2h 18mAmerican Airlines
Deal found 4/1$189
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 7/46:00 amSTL - FSD
1 stop5h 36mAmerican Airlines
Tue 7/85:14 pmFSD - STL
1 stop5h 43mAmerican Airlines
Deal found 4/1$199
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Thu 5/15:20 amSTL - FSD
1 stop5h 22mUnited Airlines
Wed 5/74:53 pmFSD - STL
1 stop7h 05mUnited Airlines
Deal found 4/1$214
This Frontier deal was found by Cheapflights users on 4/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/56:00 amORD - FSD
1 stop8h 58mFrontier
Sun 6/83:58 pmFSD - ORD
1 stop8h 01mFrontier
Deal found 4/1$218
This Delta deal was found by Cheapflights users on 4/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/85:20 pmORD - RAP
1 stop5h 36mDelta
Wed 7/162:20 pmRAP - ORD
1 stop4h 23mDelta
Deal found 4/1$229
This American Airlines deal was found by Cheapflights users on 4/1. 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 7/311:24 amMLI - RAP
1 stop7h 20mAmerican Airlines
Fri 7/412:03 pmRAP - MLI
1 stop5h 56mAmerican Airlines
Deal found 4/1$249
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/234:45 pmSTL - RAP
1 stop6h 15mUnited Airlines
Wed 4/303:43 pmRAP - STL
1 stop7h 05mUnited Airlines
Deal found 3/30$249
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Wed 6/45:02 amORD - RAP
1 stop5h 02mUnited Airlines
Sun 6/86:20 amRAP - ORD
Nonstop2h 24mUnited Airlines
Deal found 4/1$250
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/265:33 pmSTL - RAP
1 stop5h 57mDelta
Sat 5/34:19 pmRAP - STL
1 stop4h 39mDelta
Deal found 3/30$269
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Wed 4/165:25 pmMLI - FSD
1 stop4h 47mUnited Airlines
Sun 4/2011:14 amFSD - MLI
1 stop3h 57mUnited Airlines
Deal found 4/1$279
This American Airlines deal was found by Cheapflights users on 3/31. 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 8/145:36 amSTL - RAP
1 stop5h 01mAmerican Airlines
Tue 8/1912:47 pmRAP - STL
1 stop6h 36mAmerican Airlines
Deal found 3/31$279

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 2, 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 5/2

8:20 pm-10:12 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Sun 5/4

6:35 pm-8:25 pm

Nonstop1h 50m

$189

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Tue 7/8

4:08 pm-5:27 pm

Nonstop2h 19m

Rapid City

Wed 7/16

12:47 pm-4:05 pm

Nonstop2h 18m

$189

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Fri 7/4

6:00 am-11:36 am

1 stop5h 36m

Sioux Falls Joe Foss Field

Tue 7/8

5:14 pm-10:57 pm

1 stop5h 43m

$199

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Thu 5/1

5:20 am-10:42 am

1 stop5h 22m

Sioux Falls Joe Foss Field

Wed 5/7

4:53 pm-11:58 pm

1 stop7h 05m

$214

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 6/5

6:00 am-2:58 pm

1 stop8h 58m

Sioux Falls Joe Foss Field

Sun 6/8

3:58 pm-11:59 pm

1 stop8h 01m

$218

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Tue 7/8

5:20 pm-9:56 pm

1 stop5h 36m

Rapid City

Wed 7/16

2:20 pm-7:43 pm

1 stop4h 23m

$229

MolineRapid City

MLI - RAP

MLIRAP

Moline Quad-City

Thu 7/3

11:24 am-5:44 pm

1 stop7h 20m

Rapid City

Fri 7/4

12:03 pm-6:59 pm

1 stop5h 56m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 4/23

4:45 pm-10:00 pm

1 stop6h 15m

Rapid City

Wed 4/30

3:43 pm-11:48 pm

1 stop7h 05m

$249

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Wed 6/4

5:02 am-9:04 am

1 stop5h 02m

Rapid City

Sun 6/8

6:20 am-9:44 am

Nonstop2h 24m

$250

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 4/26

5:33 pm-10:30 pm

1 stop5h 57m

Rapid City

Sat 5/3

4:19 pm-9:58 pm

1 stop4h 39m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 44 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 April 2, 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 April 2, 2025.

The most flights from USIL to USSD are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in South Dakota by month

Plan your trip to South Dakota by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in South Dakota ranges from 0.6 - 3.9 inches per month. June is typically the wettest month, when rainfall can reach 3.9 in. January is typically the driest time to visit South Dakota when rainfall is around 0.6 in.

Temperature in South Dakota by month

Plan your trip to South Dakota by taking into account the average temperature totals by month.

If weather is an important factor for your trip to South Dakota, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

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 2, 2025.
Read reviews from past customers who have flown Delta, United Airlines and Allegiant Air from Illinois to South Dakota. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,898 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,615 reviews
Delta
8.0
Very good
7,898 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Allegiant Air
7.3
Good
731 reviews
Delta
8.0
Very good
7,898 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,898 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
6.0
Okay
3,276 reviews
Delta
8.0
Very good
7,898 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 American Airlines, which is currently one of the cheapest options available, starting at $100. Frontier flights start at $106 while deals on United Airlines start at $142 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$151Average$155FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$179Average$301FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$199Average$352FlexibilityNo cancel feeOn-time69%
DeltaCheapest$218Average$402FlexibilityNo cancel feeOn-timeN/A

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