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$60+ Cheap flights from South Dakota to Illinois

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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from South Dakota to Illinois

Keep the following information in mind while searching for South Dakota to Illinois flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$139
(Frontier)

One-way from

$60
(Frontier)

Popular in

April

Cheapest in

January

Average price

$379

Good round-trip deal

$172 or less

Good one-way deal

$269 or less
Provider with most accurate pricing for Sioux Falls Joe Foss Field-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Sioux Falls Joe Foss Field-Chicago (CHI) flights.
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From South Dakota to Illinois
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One-way flight from South Dakota to Illinois
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Highest demand for flights based on searches. 11% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from South Dakota to Illinois.
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Price to beat on a one-way flight from South Dakota to Illinois.
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Find flight deals from South Dakota to Illinois

Cheapest flights from South Dakota to Illinois
Explore the most affordable flight options available from South Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Frontier deal was found by Cheapflights users on 2/19. 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.
Wed 3/262:51 pmFSD - ORD
1 stop9h 53mFrontier
Fri 3/286:30 amORD - FSD
1 stop7h 22mFrontier
Deal found 2/19$139
This American Airlines deal was found by Cheapflights users on 2/20. 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 3/2912:17 pmFSD - ORD
Nonstop1h 44mAmerican Airlines
Sun 3/301:57 pmORD - FSD
Nonstop1h 38mAmerican Airlines
Deal found 2/20$189
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/68:00 amFSD - ORD
Nonstop1h 48mUnited Airlines
Mon 3/108:20 pmORD - FSD
Nonstop1h 55mUnited Airlines
Deal found 2/19$199
This United Airlines deal was found by Cheapflights users on 2/19. 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 4/31:00 pmRAP - ORD
Nonstop2h 28mUnited Airlines
Tue 4/89:15 amORD - RAP
Nonstop2h 37mUnited Airlines
Deal found 2/19$209
This Delta deal was found by Cheapflights users on 2/20. 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 4/1812:30 pmFSD - ORD
1 stop6h 19mDelta
Sun 4/276:35 amORD - FSD
1 stop5h 09mDelta
Deal found 2/20$209
This Delta deal was found by Cheapflights users on 2/19. 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 3/2010:51 amFSD - STL
1 stop6h 01mDelta
Sat 3/226:00 amSTL - FSD
1 stop4h 11mDelta
Deal found 2/19$214
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Wed 3/55:01 pmFSD - STL
1 stop5h 01mAmerican Airlines
Wed 3/266:29 pmSTL - FSD
1 stop4h 09mAmerican Airlines
Deal found 2/19$219
This Delta deal was found by Cheapflights users on 2/20. 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 3/2211:45 amRAP - ORD
1 stop4h 43mDelta
Sat 3/2910:20 amORD - RAP
1 stop6h 16mDelta
Deal found 2/20$229
This United Airlines deal was found by Cheapflights users on 2/19. 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 4/95:03 pmFSD - STL
1 stop4h 47mUnited Airlines
Tue 4/153:40 pmSTL - FSD
1 stop6h 32mUnited Airlines
Deal found 2/19$239
This Delta deal was found by Cheapflights users on 2/20. 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 4/512:30 pmFSD - MDW
1 stop6h 03mDelta
Wed 4/91:15 pmMDW - FSD
1 stop4h 51mDelta
Deal found 2/20$239
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Mon 4/1410:00 amFSD - STL
2 stops31h 16mMultiple Airlines
Thu 4/176:11 pmSTL - FSD
1 stop16h 11mMultiple Airlines
Deal found 2/20$272
This American Airlines deal was found by Cheapflights users on 2/19. 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 7/86:01 pmRAP - ORD
Nonstop2h 14mAmerican Airlines
Tue 7/1511:40 amORD - RAP
Nonstop2h 24mAmerican Airlines
Deal found 2/19$279

Find flights from South Dakota to Illinois within your budget

Customize your flight search to find flights from South Dakota to Illinois 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 February 20, 2025.

Fly from

South Dakota

Fly to

Illinois

Route

Depart

Return

Price

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 3/26

2:51 pm-12:44 am

1 stop9h 53m

Chicago O'Hare Intl

Fri 3/28

6:30 am-1:52 pm

1 stop7h 22m

$139

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sat 3/29

12:17 pm-2:01 pm

Nonstop1h 44m

Chicago O'Hare Intl

Sun 3/30

1:57 pm-3:35 pm

Nonstop1h 38m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 3/6

8:00 am-9:48 am

Nonstop1h 48m

Chicago O'Hare Intl

Mon 3/10

8:20 pm-10:15 pm

Nonstop1h 55m

$199

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 4/18

12:30 pm-6:49 pm

1 stop6h 19m

Chicago O'Hare Intl

Sun 4/27

6:35 am-11:44 am

1 stop5h 09m

$209

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Thu 4/3

1:00 pm-4:28 pm

Nonstop2h 28m

Chicago O'Hare Intl

Tue 4/8

9:15 am-10:52 am

Nonstop2h 37m

$209

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 3/20

10:51 am-4:52 pm

1 stop6h 01m

Lambert-St Louis

Sat 3/22

6:00 am-10:11 am

1 stop4h 11m

$214

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 3/5

5:01 pm-10:02 pm

1 stop5h 01m

Lambert-St Louis

Wed 3/26

6:29 pm-10:38 pm

1 stop4h 09m

$219

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Thu 3/6

5:05 am-9:35 am

1 stop4h 30m

Chicago Midway

Mon 3/10

7:09 pm-10:59 pm

1 stop3h 50m

$219

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 4/9

5:03 pm-9:50 pm

1 stop4h 47m

Lambert-St Louis

Tue 4/15

3:40 pm-10:12 pm

1 stop6h 32m

$239

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 4/14

11:12 am-5:16 pm

1 stop30h 04m

Lambert-St Louis

Thu 4/17

6:11 pm-10:22 am

1 stop16h 11m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 30 results
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Best time to book a flight from South Dakota to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from South Dakota 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.

Travel insights for flights from South Dakota to Illinois

Get recent, data-driven insights about flights from South Dakota to Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from South Dakota to Illinois?

Currently, August is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $245). Flying from South Dakota to Illinois in March is currently the most expensive (average of $321). 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 SD to IL?

Find hourly flight availability from South Dakota to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

When flying from South Dakota to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from South Dakota to Illinois

Explore weekly flight availability from South Dakota to Illinois. 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 February 20, 2025.

The most flights from USSD to USIL are scheduled on a Wednesday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated February 20, 2025.
Get a feel of what it's like to fly with Delta, United Airlines and American Airlines from South Dakota to Illinois by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

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
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

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
8,220 reviews

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

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
3,355 reviews
Delta
8.0
Very good
8,220 reviews

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

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 South Dakota to Illinois. 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 South Dakota to Illinois one-way?

    One-way options have recently been found by users for as low as $60 on Frontier. Other airlines that offer cheap prices include Delta from $203 and American Airlines from $214 one-way.

  • Can I find deals for flights from South Dakota to Illinois that include hotel bookings?

    Yes. In addition to deals on South Dakota to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Dakota to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Dakota to Illinois.

  • Can I find deals for business class flights from South Dakota to Illinois?

    Yes. Cheapflights offers flight deals from South Dakota to Illinois 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 South Dakota to Illinois?

    Currently, August is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $245). Flying from South Dakota to Illinois in March is currently the most expensive (average of $321). 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 South Dakota to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from South Dakota to Illinois

Discover the top 4 airlines that operate flights from South Dakota to Illinois. 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$153Average$198FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$184Average$275FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$192Average$336FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$303FlexibilityNo cancel feeOn-timeN/A
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