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$98+ 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 12/17. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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Cheap flight deals from South Dakota to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from South Dakota (USSD) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

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 November 20, 2024.

This Frontier deal was found by Cheapflights users on 11/19. 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.
Fri 12/66:25 pmFSD - MDW
1 stop5h 48mFrontier
Mon 12/97:15 amMDW - FSD
1 stop10h 08mFrontier
Deal found 11/19$137
This Frontier deal was found by Cheapflights users on 11/19. 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.
Fri 12/66:25 pmFSD - ORD
1 stop6h 10mFrontier
Mon 12/97:25 amORD - FSD
1 stop9h 58mFrontier
Deal found 11/19$137
This American Airlines deal was found by Cheapflights users on 11/18. 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 12/184:50 pmFSD - ORD
Nonstop1h 48mAmerican Airlines
Mon 1/139:00 pmORD - FSD
Nonstop1h 51mAmerican Airlines
Deal found 11/18$189
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Sun 12/223:13 pmFSD - ORD
Nonstop1h 57mUnited Airlines
Sun 12/298:20 pmORD - FSD
Nonstop1h 55mUnited Airlines
Deal found 11/19$191
This Delta deal was found by Cheapflights users on 11/19. 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.
Sat 12/145:30 pmFSD - ORD
1 stop4h 55mDelta
Thu 1/96:15 amORD - FSD
1 stop4h 06mDelta
Deal found 11/19$208
This Delta deal was found by Cheapflights users on 11/20. 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 12/141:25 pmFSD - MDW
1 stop5h 07mDelta
Tue 12/244:50 pmMDW - FSD
1 stop6h 12mDelta
Deal found 11/20$233
This United Airlines deal was found by Cheapflights users on 11/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/510:00 amFSD - STL
1 stop5h 34mUnited Airlines
Mon 12/91:39 pmSTL - FSD
1 stop7h 06mUnited Airlines
Deal found 11/20$248
This Delta deal was found by Cheapflights users on 11/20. 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.
Thu 12/124:15 pmRAP - STL
1 stop5h 11mDelta
Sun 12/157:15 pmSTL - RAP
1 stop4h 44mDelta
Deal found 11/20$248
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Fri 12/64:29 pmRAP - ORD
1 stop6h 28mAmerican Airlines
Sun 12/86:00 amORD - RAP
1 stop6h 58mAmerican Airlines
Deal found 11/20$258
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/58:45 amRAP - STL
1 stop6h 44mUnited Airlines
Sun 12/84:31 pmSTL - RAP
1 stop5h 26mUnited Airlines
Deal found 11/19$258
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Thu 12/54:29 pmRAP - STL
1 stop5h 04mAmerican Airlines
Sun 12/85:05 amSTL - RAP
1 stop7h 53mAmerican Airlines
Deal found 11/20$283
This American Airlines deal was found by Cheapflights users on 11/18. 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 11/205:30 amFSD - STL
1 stop4h 18mAmerican Airlines
Sun 11/247:15 amSTL - FSD
1 stop5h 31mAmerican Airlines
Deal found 11/18$288

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 1/10

6:43 pm-12:35 am

1 stop5h 52m

Chicago O'Hare Intl

Mon 1/13

7:50 am-5:39 pm

1 stop9h 49m

$118

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Fri 12/6

6:25 pm-12:13 am

1 stop5h 48m

Chicago Midway

Mon 12/9

7:15 am-5:23 pm

1 stop10h 08m

$137

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 12/18

4:50 pm-6:38 pm

Nonstop1h 48m

Chicago O'Hare Intl

Mon 1/13

9:00 pm-10:51 pm

Nonstop1h 51m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sun 12/22

3:13 pm-5:10 pm

Nonstop1h 57m

Chicago O'Hare Intl

Sun 12/29

8:20 pm-10:15 pm

Nonstop1h 55m

$191

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 1/11

11:49 am-5:29 pm

1 stop4h 40m

Chicago O'Hare Intl

Tue 1/14

11:50 am-3:37 pm

1 stop4h 47m

$196

Rapid CityChicago

RAP - MDW

RAPMDW

Rapid City

Sat 1/11

11:49 am-5:47 pm

1 stop4h 58m

Chicago Midway

Tue 1/14

6:59 pm-10:45 pm

1 stop4h 46m

$196

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Sat 1/4

1:25 pm-5:44 pm

1 stop4h 19m

Chicago Midway

Sat 1/11

6:59 pm-11:07 pm

1 stop4h 08m

$208

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sat 12/14

5:30 pm-10:25 pm

1 stop4h 55m

Chicago O'Hare Intl

Thu 1/9

6:15 am-10:21 am

1 stop4h 06m

$208

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Thu 12/5

10:00 am-3:34 pm

1 stop5h 34m

Lambert-St Louis

Mon 12/9

1:39 pm-8:45 pm

1 stop7h 06m

$248

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 12/12

4:15 pm-10:26 pm

1 stop5h 11m

Lambert-St Louis

Sun 12/15

7:15 pm-10:59 pm

1 stop4h 44m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 33 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, September is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $232). Flying from South Dakota to Illinois in June is currently the most expensive (average of $308). 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 November 20, 2024.

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 November 20, 2024.

The most flights from USSD to USIL 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 (7 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 November 20, 2024.
Get a feel of what it's like to fly with American Airlines, Delta and Frontier 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
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 10

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

Delta
8.0
Very good
8,756 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 10

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

United Airlines
7.4
Good
9,171 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 10

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
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 10

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

Frontier
6.1
Okay
3,539 reviews
Delta
8.0
Very good
8,756 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 10

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 $98 on Delta. Other airlines that offer cheap prices include Frontier from $175 and United Airlines from $198 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, September is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $232). Flying from South Dakota to Illinois in June is currently the most expensive (average of $308). 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$153Average$227FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$184Average$275FlexibilityNo cancel feeOn-time71%
DeltaCheapest$186Average$338FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$197Average$340FlexibilityNo cancel feeOn-time69%
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