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$89+ Cheap flights from Sioux Falls (FSD) 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Sioux Falls to Illinois

Keep the following information in mind while searching for Sioux Falls to Illinois flight deals. Data was last updated July 29, 2025.

Round-trip from

$189
(American Airlines)

One-way from

$89
(Frontier)

Popular in

March

Cheapest in

January

Average price

$300

Good round-trip deal

$341 or less

Good one-way deal

$239 or less
From Sioux Falls Joe Foss Field to Illinois
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One-way flight from Sioux Falls Joe Foss Field to Illinois
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Highest demand for flights based on searches. 10% potential increase in price ($33 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 July 2025
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Price to beat on a round-trip flight from Sioux Falls Joe Foss Field to Illinois.
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Price to beat on a one-way flight from Sioux Falls Joe Foss Field to Illinois.
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Find flight deals from Sioux Falls to Illinois

Cheapest flights from Sioux Falls to Illinois
Explore the most affordable flight options available from Sioux Falls to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Frontier deal was found by Cheapflights users on 7/27. 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.
Sun 8/32:57 pmFSD - ORD
1 stop9h 35mFrontier
Wed 8/67:00 amORD - FSD
1 stop11h 54mFrontier
Deal found 7/27$188
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/216:00 amFSD - ORD
Nonstop1h 46mAmerican Airlines
Sun 8/2410:20 pmORD - FSD
Nonstop2h 08mAmerican Airlines
Deal found 7/29$189
This United Airlines deal was found by Cheapflights users on 7/27. 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 9/266:10 pmFSD - ORD
Nonstop1h 59mUnited Airlines
Mon 9/298:30 pmORD - FSD
Nonstop1h 52mUnited Airlines
Deal found 7/27$192
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/157:32 pmFSD - MDW
1 stop25h 22mFrontier
Mon 8/1812:35 pmMDW - FSD
1 stop6h 02mFrontier
Deal found 7/27$205
This Delta deal was found by Cheapflights users on 7/28. 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 8/275:00 amFSD - ORD
1 stop3h 24mDelta
Sat 8/306:10 amORD - FSD
1 stop6h 06mDelta
Deal found 7/28$209
This Delta deal was found by Cheapflights users on 7/29. 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 8/205:00 amFSD - MDW
2 stops7h 28mDelta
Sat 8/237:17 pmMDW - FSD
1 stop4h 29mDelta
Deal found 7/29$214
This Delta deal was found by Cheapflights users on 7/28. 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.
Mon 8/256:04 pmFSD - STL
1 stop5h 20mDelta
Mon 9/15:30 pmSTL - FSD
1 stop6h 16mDelta
Deal found 7/28$229
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/136:26 pmFSD - STL
1 stop4h 19mUnited Airlines
Sun 8/175:15 amSTL - FSD
1 stop5h 27mUnited Airlines
Deal found 7/29$239
This Mytrip deal was found by Cheapflights users on 7/27. 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.
Fri 9/267:37 pmFSD - ORD
2 stops22h 02mMultiple Airlines
Sun 9/286:44 pmORD - FSD
2 stops21h 28mMultiple Airlines
Deal found 7/27$284
This Justfly.com deal was found by Cheapflights users on 7/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/312:57 pmFSD - STL
1 stop18h 14mFrontier
Sat 8/27:29 pmSTL - FSD
1 stop18h 33mFrontier
Deal found 7/27$307
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/131:28 pmFSD - BMI
1 stop8h 01mAmerican Airlines
Sun 8/177:01 amBMI - FSD
1 stop5h 57mAmerican Airlines
Deal found 7/29$507
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/136:00 amFSD - STL
2 stops10h 56mAmerican Airlines
Sun 8/179:23 amSTL - FSD
1 stop7h 12mAmerican Airlines
Deal found 7/29$638

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux Falls 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 July 29, 2025.
Use the filters below to find and compare flights from Sioux Falls to Illinois that are best for you.

Fly from

Sioux Falls

Fly to

Illinois

Route

Depart

Return

Price

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 8/21

6:00 am-7:46 am

Nonstop1h 46m

Chicago O'Hare Intl

Sun 8/24

10:20 pm-12:28 am

Nonstop2h 08m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 9/26

6:10 pm-8:09 pm

Nonstop1h 59m

Chicago O'Hare Intl

Mon 9/29

8:30 pm-10:22 pm

Nonstop1h 52m

$192

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 8/27

3:07 pm-9:42 pm

1 stop6h 35m

Chicago O'Hare Intl

Sun 8/31

6:00 am-1:23 pm

1 stop7h 23m

$195

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Mon 9/8

5:02 pm-10:43 am

2 stops17h 41m

Chicago O'Hare Intl

Thu 9/11

6:44 pm-6:58 pm

2 stops24h 14m

$205

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Fri 8/15

7:32 pm-8:54 pm

1 stop25h 22m

Chicago Midway

Mon 8/18

12:35 pm-6:37 pm

1 stop6h 02m

$205

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Sat 9/6

12:56 pm-5:04 pm

1 stop4h 08m

Chicago O'Hare Intl

Tue 9/9

8:25 am-1:50 pm

1 stop5h 25m

$209

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 8/25

6:04 pm-11:24 pm

1 stop5h 20m

Lambert-St Louis

Mon 9/1

5:30 pm-11:46 pm

1 stop6h 16m

$229

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Wed 8/27

12:56 pm-5:37 pm

1 stop4h 41m

Chicago Midway

Sat 8/30

7:17 pm-11:46 pm

1 stop4h 29m

$234

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Wed 8/13

6:26 pm-10:45 pm

1 stop4h 19m

Lambert-St Louis

Sun 8/17

5:15 am-10:42 am

1 stop5h 27m

$239

Sioux FallsBloomington

FSD - BMI

FSDBMI

Sioux Falls Joe Foss Field

Wed 8/13

1:28 pm-9:29 pm

1 stop8h 01m

Bloomington-Normal

Sun 8/17

7:01 am-12:58 pm

1 stop5h 57m

$507

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 21 results
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Best time to book a flight from Sioux Falls to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Sioux Falls 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 Sioux Falls to Illinois

What is the cheapest month to book a flight from Sioux Falls to Illinois?

Currently, August is the cheapest month in which you can book a flight from Sioux Falls to Illinois (average of $245). Flying from Sioux Falls 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 FSD to IL?

Find hourly flight availability from Sioux Falls 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 July 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Sioux Falls to Illinois as you normally would.

Weekly flight availability from Sioux Falls to Illinois

Explore weekly flight availability from Sioux Falls 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 July 29, 2025.

The most flights from FSD to USIL are scheduled on a Tuesday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 July 29, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Sioux Falls to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.9
Fair
3,238 reviews
Delta
8.0
Very good
7,979 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Sioux Falls to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Sioux Falls to Illinois?

    Most people fly from Sioux Falls Joe Foss Field (FSD) if they book a flight from Sioux Falls to Illinois. Sioux Falls Joe Foss Field is conveniently located just 2.6 mi from Sioux Falls’s city center.

  • What are the cheapest airlines to fly from Sioux Falls to Illinois one-way?

    One-way options have recently been found by users for as low as $89 on Frontier. Other airlines that offer cheap prices include Delta from $167 and American Airlines from $201 one-way.

  • What are the most popular routes from Sioux Falls to Illinois?

    Most travelers choose Sioux Falls Joe Foss Field - Chicago O'Hare Intl, Sioux Falls Joe Foss Field - Chicago Midway or Sioux Falls Joe Foss Field - Lambert-St Louis when deciding on the best route from Sioux Falls to Illinois.

  • What are the most reliable airlines from Sioux Falls to Illinois?

    No one likes to see their flight delayed. When booking a flight from Sioux Falls to Illinois consider choosing Copa Airlines (90%), Envoy Air (86%) or Air New Zealand (72%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Sioux Falls to Illinois?

    On average you can expect to pay $1,404 for a flight from Sioux Falls to Illinois. The cheapest flight overall is $159 while the most popular route, (Sioux Falls Joe Foss Field - Chicago O'Hare Intl) is currently priced at $189.

  • Can I find deals for flights from Sioux Falls to Illinois that include hotel bookings?

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

  • How can I find direct flights from Sioux Falls to Illinois?

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

  • Can I find deals for business class flights from Sioux Falls to Illinois?

    Yes. Cheapflights offers flight deals from Sioux Falls 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 Sioux Falls to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Sioux Falls to Illinois (average of $245). Flying from Sioux Falls 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.

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Alternative routes for Sioux Falls to Illinois

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Top 3 airlines flying from Sioux Falls to Illinois

Discover the top 3 airlines that operate flights from Sioux Falls 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$179Average$256FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$193Average$295FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$263FlexibilityNo cancel feeOn-timeN/A

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