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South Dakota

$106+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$189
(American Airlines)

One-way from

$106
(Mytrip)

Popular in

January

Cheapest in

March

Average price

$337

Good round-trip deal

$189 or less

Good one-way deal

$169 or less
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. 13% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 8/2110:20 pmORD - FSD
Nonstop2h 08mAmerican Airlines
Sun 8/246:03 pmFSD - ORD
Nonstop1h 46mAmerican Airlines
Deal found 6/10$189
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 7/144:13 pmORD - RAP
Nonstop2h 18mAmerican Airlines
Fri 7/186:01 pmRAP - ORD
Nonstop2h 17mAmerican Airlines
Deal found 6/10$191
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/148:45 amORD - RAP
Nonstop2h 35mUnited Airlines
Fri 7/185:59 pmRAP - ORD
1 stop5h 31mUnited Airlines
Deal found 6/10$201
This Delta deal was found by Cheapflights users on 6/11. 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 7/265:35 pmORD - FSD
1 stop6h 09mDelta
Sat 8/3012:56 pmFSD - ORD
1 stop4h 08mDelta
Deal found 6/11$209
This Delta deal was found by Cheapflights users on 6/11. 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 7/267:21 pmMDW - FSD
1 stop4h 23mDelta
Sat 8/211:12 amFSD - MDW
1 stop5h 58mDelta
Deal found 6/11$209
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/288:20 pmORD - FSD
Nonstop1h 52mUnited Airlines
Sun 8/316:11 pmFSD - ORD
Nonstop1h 59mUnited Airlines
Deal found 6/10$213
This Delta deal was found by Cheapflights users on 6/11. 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 8/136:00 amSTL - FSD
1 stop6h 15mDelta
Tue 8/1912:56 pmFSD - STL
1 stop3h 49mDelta
Deal found 6/11$229
This Delta deal was found by Cheapflights users on 6/10. 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 7/262:00 pmORD - RAP
2 stops9h 31mDelta
Sat 8/210:53 amRAP - ORD
1 stop4h 57mDelta
Deal found 6/10$244
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/65:00 amSTL - RAP
1 stop6h 20mUnited Airlines
Sat 8/3011:18 amRAP - STL
1 stop4h 15mUnited Airlines
Deal found 6/10$249
This Delta deal was found by Cheapflights users on 6/10. 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 8/65:37 pmSTL - RAP
1 stop5h 54mDelta
Sat 8/3010:55 amRAP - STL
2 stops10h 00mDelta
Deal found 6/10$254
This Frontier deal was found by Cheapflights users on 6/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/256:00 amORD - FSD
1 stop7h 23mFrontier
Wed 8/273:07 pmFSD - ORD
1 stop6h 35mFrontier
Deal found 6/12$256
This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/107:08 amORD - RAP
1 stop15h 01mMultiple Airlines
Sun 7/139:49 pmRAP - ORD
2 stops34h 06mMultiple Airlines
Deal found 6/11$269

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 June 12, 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 8/21

10:20 pm-12:28 am

Nonstop2h 08m

Sioux Falls Joe Foss Field

Sun 8/24

6:03 pm-7:49 pm

Nonstop1h 46m

$189

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Mon 7/14

4:13 pm-5:31 pm

Nonstop2h 18m

Rapid City

Fri 7/18

6:01 pm-9:18 pm

Nonstop2h 17m

$191

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Mon 7/14

8:45 am-10:20 am

Nonstop2h 35m

Rapid City

Fri 7/18

5:59 pm-12:30 am

1 stop5h 31m

$201

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Sat 7/26

5:35 pm-11:44 pm

1 stop6h 09m

Sioux Falls Joe Foss Field

Sat 8/30

12:56 pm-5:04 pm

1 stop4h 08m

$209

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

Sat 7/26

7:21 pm-11:44 pm

1 stop4h 23m

Sioux Falls Joe Foss Field

Sat 8/2

11:12 am-5:10 pm

1 stop5h 58m

$209

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

Thu 8/28

8:20 pm-10:12 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

Sun 8/31

6:11 pm-8:10 pm

Nonstop1h 59m

$213

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

Wed 8/13

8:46 am-12:15 pm

1 stop3h 29m

Sioux Falls Joe Foss Field

Tue 8/19

5:00 am-10:37 am

1 stop5h 37m

$229

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

Sat 7/26

2:00 pm-10:31 pm

2 stops9h 31m

Rapid City

Sat 8/2

10:53 am-4:50 pm

1 stop4h 57m

$244

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 8/6

5:00 am-10:20 am

1 stop6h 20m

Rapid City

Sat 8/30

11:18 am-4:33 pm

1 stop4h 15m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 8/6

5:37 pm-10:31 pm

1 stop5h 54m

Rapid City

Sat 8/30

10:55 am-9:55 pm

2 stops10h 00m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 52 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 June 12, 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 June 12, 2025.

The most flights from USIL to USSD are scheduled on a Tuesday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 June 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Sun Country Air
6.9
Okay
345 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $110. Delta flights start at $120 while deals on Sun Country Air start at $122 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$152Average$170FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$179Average$296FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$207Average$364FlexibilityNo cancel feeOn-time69%
DeltaCheapest$218Average$368FlexibilityNo cancel feeOn-timeN/A

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