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South Dakota

$84+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — FSD
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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Cheap flight deals from Illinois to South Dakota

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to South Dakota (USSD). 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 enero 21, 2025.

Round-trip from

$189
(United Airlines)

One-way from

$84
(Frontier)

Good round-trip deal

$239 or less

Good one-way deal

$160 or less
From Illinois to South Dakota
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One-way flight from Illinois to South Dakota
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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 enero 21, 2025.

This United Airlines deal was found by Cheapflights users on 1/19. 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.
sáb. 3/88:20 pmORD - FSD
Nonstop1h 55mUnited Airlines
dom. 3/168:00 amFSD - ORD
Nonstop1h 49mUnited Airlines
Deal found 1/19$189
This American Airlines deal was found by Cheapflights users on 1/20. 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.
jue. 2/131:49 pmORD - FSD
Nonstop1h 40mAmerican Airlines
dom. 2/164:01 pmFSD - ORD
Nonstop1h 34mAmerican Airlines
Deal found 1/20$190
This Delta deal was found by Cheapflights users on 1/21. 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.
mar. 2/186:00 amSTL - FSD
1 stop4h 19mDelta
mar. 2/251:18 pmFSD - STL
1 stop3h 35mDelta
Deal found 1/21$199
This Delta deal was found by Cheapflights users on 1/21. 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.
jue. 2/136:15 amORD - FSD
1 stop4h 04mDelta
dom. 2/1611:00 amFSD - ORD
1 stop4h 30mDelta
Deal found 1/21$209
This Delta deal was found by Cheapflights users on 1/21. 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.
jue. 2/131:26 pmMDW - FSD
1 stop4h 50mDelta
dom. 2/161:18 pmFSD - MDW
1 stop4h 25mDelta
Deal found 1/21$209
This American Airlines deal was found by Cheapflights users on 1/21. 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.
mié. 2/55:03 amSTL - FSD
1 stop7h 52mAmerican Airlines
dom. 2/94:46 pmFSD - STL
1 stop5h 23mAmerican Airlines
Deal found 1/21$219
This Delta deal was found by Cheapflights users on 1/21. 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.
lun. 2/176:00 amSTL - RAP
1 stop6h 04mDelta
lun. 2/244:19 pmRAP - STL
1 stop4h 58mDelta
Deal found 1/21$249
This Frontier deal was found by Cheapflights users on 1/21. 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.
vie. 3/76:30 amORD - FSD
1 stop7h 22mFrontier
vie. 3/142:51 pmFSD - ORD
1 stop9h 53mFrontier
Deal found 1/21$259
This United Airlines deal was found by Cheapflights users on 1/20. 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.
mié. 4/29:15 amORD - RAP
Nonstop2h 37mUnited Airlines
mar. 4/81:00 pmRAP - ORD
Nonstop2h 28mUnited Airlines
Deal found 1/20$269
This Delta deal was found by Cheapflights users on 1/20. 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.
sáb. 2/156:15 amORD - RAP
1 stop5h 49mDelta
mar. 2/1811:49 amRAP - ORD
1 stop4h 40mDelta
Deal found 1/20$289
This Delta deal was found by Cheapflights users on 1/20. 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.
mar. 2/1810:19 amMDW - RAP
1 stop6h 14mDelta
vie. 2/2811:49 amRAP - MDW
1 stop4h 54mDelta
Deal found 1/20$289
This American Airlines deal was found by Cheapflights users on 1/19. 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.
jue. 1/235:03 amSTL - RAP
1 stop7h 54mAmerican Airlines
sáb. 1/255:24 amRAP - STL
1 stop6h 36mAmerican Airlines
Deal found 1/19$349

Find flights from Illinois to South Dakota within your budget

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 enero 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

sáb. 3/8

8:20 pm-10:15 pm

Nonstop1h 55m

Sioux Falls Joe Foss Field

dom. 3/16

8:00 am-9:49 am

Nonstop1h 49m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

jue. 2/13

1:49 pm-3:29 pm

Nonstop1h 40m

Sioux Falls Joe Foss Field

dom. 2/16

4:01 pm-5:35 pm

Nonstop1h 34m

$190

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

mar. 2/18

6:00 am-10:19 am

1 stop4h 19m

Sioux Falls Joe Foss Field

mar. 2/25

1:18 pm-4:53 pm

1 stop3h 35m

$199

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

jue. 2/13

6:15 am-10:19 am

1 stop4h 04m

Sioux Falls Joe Foss Field

dom. 2/16

11:00 am-3:30 pm

1 stop4h 30m

$209

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

jue. 2/13

1:26 pm-6:16 pm

1 stop4h 50m

Sioux Falls Joe Foss Field

dom. 2/16

1:18 pm-5:43 pm

1 stop4h 25m

$209

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

mié. 2/5

5:03 am-12:55 pm

1 stop7h 52m

Sioux Falls Joe Foss Field

dom. 2/9

4:46 pm-10:09 pm

1 stop5h 23m

$219

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

lun. 2/17

6:00 am-11:04 am

1 stop6h 04m

Rapid City

lun. 2/24

4:19 pm-10:17 pm

1 stop4h 58m

$249

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

mié. 4/2

9:15 am-10:52 am

Nonstop2h 37m

Rapid City

mar. 4/8

1:00 pm-4:28 pm

Nonstop2h 28m

$269

ChicagoRapid City

MDW - RAP

MDWRAP

Chicago Midway

mar. 2/18

10:19 am-3:33 pm

1 stop6h 14m

Rapid City

sáb. 2/22

11:49 am-5:43 pm

1 stop4h 54m

$289

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

sáb. 2/15

11:35 am-3:33 pm

1 stop4h 58m

Rapid City

mar. 2/25

4:19 pm-9:58 pm

1 stop4h 39m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 36 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.

Travel insights for flights from Illinois to South Dakota

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

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 enero 21, 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 enero 21, 2025.

The most flights from USIL to USSD are scheduled on a Monday (13 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (8 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 enero 21, 2025.
Read reviews from past customers who have flown Delta, American Airlines 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.
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

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
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

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
8,985 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

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
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

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
3,443 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

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 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 Frontier, which is currently one of the cheapest options available, starting at $84. Delta flights start at $210 while deals on American Airlines start at $211 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 enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$151Average$155FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$179Average$476FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$199Average$356FlexibilityNo cancel feeOn-time69%
DeltaCheapest$218Average$390FlexibilityNo cancel feeOn-timeN/A
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