How long is the flight from South Dakota to Illinois?

The flight from South Dakota to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Sioux Falls (a popular airport in South Dakota) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 1h 44m on average. If you fly from Rapid City (another popular airport in South Dakota) to Chicago O'Hare Intl Airport, then the average flight time is 2h 21m.

How many flights depart from South Dakota to Illinois on average per day?

As of July 2025, there are 23 flights per day flying from South Dakota to Illinois. The most common time of day flights depart is 12:00PM, with 52% of flights taking off in the afternoon.

What is the cheapest airline that flies from South Dakota to Illinois?

Frontier, American Airlines, and Delta are the most popular carriers operating from South Dakota to Illinois

How many flights depart from South Dakota to Illinois on average per week?

The number of flights available between South Dakota and Illinois is 161 per week as of July 2025. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.

What airlines fly to Illinois?

United Airlines, American Airlines and Denver Air Connection are the top three most popular airlines that fly to Illinois from South Dakota according to our data. United Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from South Dakota to Illinois?

Prices for flights from South Dakota to Illinois are updated daily.

How many operators does momondo search for flights from South Dakota to Illinois?

The number of operators available for flights from South Dakota to Illinois is 3 as of July 2025.

How old do you have to be to fly from South Dakota to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Dakota to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$89 Cheap Flights from South Dakota to Illinois in 2025

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Find the cheapest flights from South Dakota to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:16 pm - 9:14 pmFSD-ORD

1h 58mnonstop

11:11 am - 1:13 pmORD-FSD

2h 02mnonstop

$189American Airlines

Find Deal

Fri, Nov 21 - Mon, Nov 24

6:12 pm - 9:30 pmRAP-ORD

2h 18mnonstop

4:17 pm - 5:42 pmORD-RAP

2h 25mnonstop

$191American Airlines

Find Deal

Thu, Sep 18 - Mon, Sep 22

3:07 pm - 9:42 pmFSD-ORD

6h 35m1 stop

6:00 am - 1:23 pmORD-FSD

7h 23m1 stop

$195Frontier

Find Deal

Wed, Aug 27 - Sun, Aug 31

7:48 pm - 8:54 pmFSD-MDW

25h 06m1 stop

12:35 pm - 6:37 pmMDW-FSD

6h 02m1 stop

$197Frontier

Find Deal

Wed, Aug 13 - Mon, Aug 18

5:00 am - 8:24 amFSD-ORD

3h 24m1 stop

6:10 am - 12:16 pmORD-FSD

6h 06m1 stop

$209Delta

Find Deal

Wed, Aug 20 - Sat, Aug 23

5:00 am - 12:28 pmFSD-MDW

7h 28m2 stops

7:17 pm - 11:46 pmMDW-FSD

4h 29m1 stop

$214Delta

Find Deal

Wed, Aug 20 - Sat, Aug 23

5:59 pm - 11:59 pmRAP-ORD

5h 00m1 stop

8:53 am - 10:22 amORD-RAP

2h 29mnonstop

$219United Airlines

Find Deal

Sat, Aug 30 - Mon, Sep 1

6:26 pm - 8:16 pmFSD-ORD

1h 50mnonstop

8:20 pm - 10:12 pmORD-FSD

1h 52mnonstop

$223United Airlines

Find Deal

Mon, Aug 11 - Fri, Aug 29

12:43 pm - 4:49 amFSD-ORD

16h 06m1 stop

6:44 pm - 6:58 pmORD-FSD

24h 14m2 stops

$230

Find Deal

Mon, Sep 8 - Thu, Sep 11

5:02 pm - 10:43 amFSD-ORD

17h 41m2 stops

6:10 am - 6:58 pmORD-FSD

36h 48m3 stops

$262

Find Deal

Mon, Sep 8 - Thu, Sep 11

American Airlines flights from South Dakota to Illinois

Our best American Airlines deals on South Dakota to Illinois flight tickets

American Airlines

Nov 21

FSD7:16 pmSioux Falls Joe Foss Field

1h 58m

ORD9:14 pmChicago O'Hare Intl

Nov 24

ORD11:11 amChicago O'Hare Intl

2h 02m

FSD1:13 pmSioux Falls Joe Foss Field

$189

Find similar

American Airlines

Sep 18

RAP6:12 pmRapid City

2h 18m

ORD9:30 pmChicago O'Hare Intl

Sep 22

ORD4:17 pmChicago O'Hare Intl

2h 25m

RAP5:42 pmRapid City

$191

Find similar

American Airlines

Aug 19

FSD12:47 pmSioux Falls Joe Foss Field

1h 46m

ORD2:33 pmChicago O'Hare Intl

Aug 23

ORD3:30 pmChicago O'Hare Intl

2h 03m

FSD5:33 pmSioux Falls Joe Foss Field

$194

Find similar

Frontier flights from South Dakota to Illinois

Our best Frontier deals on South Dakota to Illinois flight tickets

Frontier

Aug 27

FSD3:07 pmSioux Falls Joe Foss Field

6h 35m

1 stop

ORD9:42 pmChicago O'Hare Intl

Aug 31

ORD6:00 amChicago O'Hare Intl

7h 23m

1 stop

FSD1:23 pmSioux Falls Joe Foss Field

$195

Find similar

Frontier

Aug 13

FSD7:48 pmSioux Falls Joe Foss Field

25h 06m

1 stop

MDW8:54 pmChicago Midway

Aug 18

MDW12:35 pmChicago Midway

6h 02m

1 stop

FSD6:37 pmSioux Falls Joe Foss Field

$197

Find similar

Frontier

Aug 14

FSD2:57 pmSioux Falls Joe Foss Field

9h 35m

1 stop

ORD12:32 amChicago O'Hare Intl

Aug 17

ORD5:40 amChicago O'Hare Intl

8h 22m

1 stop

FSD2:02 pmSioux Falls Joe Foss Field

$198

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 11/21

7:16 pm-9:14 pm

Nonstop1h 58m

Chicago O'Hare Intl

Mon 11/24

11:11 am-1:13 pm

Nonstop2h 02m

$189

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Thu 9/18

6:12 pm-9:30 pm

Nonstop2h 18m

Chicago O'Hare Intl

Mon 9/22

4:17 pm-5:42 pm

Nonstop2h 25m

$191

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 - MDW

FSDMDW

Sioux Falls Joe Foss Field

Wed 8/13

7:48 pm-8:54 pm

1 stop25h 06m

Chicago Midway

Mon 8/18

12:35 pm-6:37 pm

1 stop6h 02m

$197

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 8/20

5:00 am-8:24 am

1 stop3h 24m

Chicago O'Hare Intl

Sat 8/23

6:10 am-12:16 pm

1 stop6h 06m

$209

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Wed 8/20

5:00 am-12:28 pm

2 stops7h 28m

Chicago Midway

Sat 8/23

7:17 pm-11:46 pm

1 stop4h 29m

$214

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Sat 8/30

5:59 pm-11:59 pm

1 stop5h 00m

Chicago O'Hare Intl

Mon 9/1

8:53 am-10:22 am

Nonstop2h 29m

$219

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Mon 8/11

6:26 pm-8:16 pm

Nonstop1h 50m

Chicago O'Hare Intl

Fri 8/29

8:20 pm-10:12 pm

Nonstop1h 52m

$223

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Mon 9/8

12:43 pm-4:49 am

1 stop16h 06m

Chicago O'Hare Intl

Thu 9/11

6:44 pm-6:58 pm

2 stops24h 14m

$230

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

6:10 am-6:58 pm

3 stops36h 48m

$262

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How to get the cheapest flight ticket from South Dakota to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from South Dakota is in January. Flight prices, which tend to average around $193, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $249.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from South Dakota to Illinois is on a Friday when prices can be found for as low as $429. Flights from South Dakota to Illinois on a Sunday will generally be more expensive and average around $623. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from South Dakota to Illinois during this time can be as low as $244. Flights in the afternoon are often more expensive with an average ticket price of $517.

What is the cheapest South Dakota to Illinois flight route?

Fly from Watertown to Chicago O'Hare Intl for the best South Dakota - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from South Dakota when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $279 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from South Dakota for as low as $235 on momondo.

What cabin class options are available on South Dakota to Illinois flights?

There are 4 cabin classes available to choose from on South Dakota to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on South Dakota to Illinois flights?

No. A direct flight is the cheapest option for a flight between South Dakota to Illinois.

Cheap South Dakota to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from South Dakota to Illinois

Best Price Found	$89
Fastest flight time	1h 44m
Direct flights	Every day
Airports in Illinois	3 airports

The best one-way flight to Illinois from South Dakota in the past 72 hours is $89. The best round-trip flight deal from South Dakota to Illinois found on momondo in the last 72 hours is $189.

The fastest flight from South Dakota to Illinois takes 1h 44m

Direct flights go from South Dakota to Illinois every day.

There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from South Dakota to Illinois?
Prices for flights from South Dakota to Illinois are updated daily.
How many operators does momondo search for flights from South Dakota to Illinois?
The number of operators available for flights from South Dakota to Illinois is 3 as of July 2025.
How old do you have to be to fly from South Dakota to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Dakota to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from South Dakota to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from South Dakota to Illinois is Canadair (Bombardier) Regional Jet CRJ-550 (19.85% of total bookings). The next most popular plane models are Canadair (Bombardier) Regional Jet 700 (19.40%), Boeing 737-800 (11.94%), and Embraer 170 (7.91%).

Best airlines flying from South Dakota to Illinois

Compare and see reviews for airlines that fly from South Dakota to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Denver Air Connection	PriceFrom $172	Free Cancellation	Rating 9.2 13 reviews	Search Denver Air Connection flights
American Airlines	PriceFrom $179	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $193	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Delta	PriceFrom $208	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from South Dakota to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from South Dakota to Illinois for you.

Can I find flights from South Dakota to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from South Dakota which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from South Dakota to Illinois?

Once all potential South Dakota to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from South Dakota to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from South Dakota. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Illinois

Popular cities in Illinois

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Cheap flights from South Dakota to Illinois from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from South Dakota to Illinois departing on 8/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Find the cheapest flights from South Dakota to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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American Airlines flights from South Dakota to Illinois

Our best American Airlines deals on South Dakota to Illinois flight tickets

Frontier flights from South Dakota to Illinois

Our best Frontier deals on South Dakota to Illinois flight tickets

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Use the filters below to find and compare flights from South Dakota to Illinois that are best for you.

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How to get the cheapest flight ticket from South Dakota to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from South Dakota to Illinois during this time can be as low as $244. Flights in the afternoon are often more expensive with an average ticket price of $517.

What is the cheapest South Dakota to Illinois flight route?

Fly from Watertown to Chicago O'Hare Intl for the best South Dakota - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on South Dakota to Illinois flights?

There are 4 cabin classes available to choose from on South Dakota to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on South Dakota to Illinois flights?

No. A direct flight is the cheapest option for a flight between South Dakota to Illinois.

What is the cheapest airline that flies from South Dakota to Illinois?

Frontier, American Airlines, and Delta are the most popular carriers operating from South Dakota to Illinois

What airlines fly to Illinois?

How many flights depart from South Dakota to Illinois on average per day?

As of July 2025, there are 23 flights per day flying from South Dakota to Illinois. The most common time of day flights depart is 12:00PM, with 52% of flights taking off in the afternoon.

How many flights depart from South Dakota to Illinois on average per week?

The number of flights available between South Dakota and Illinois is 161 per week as of July 2025. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.

How long is the flight from South Dakota to Illinois?

Cheap South Dakota to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from South Dakota to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from South Dakota to Illinois?

How many operators does momondo search for flights from South Dakota to Illinois?

How old do you have to be to fly from South Dakota to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from South Dakota to Illinois?

Best airlines flying from South Dakota to Illinois

Compare and see reviews for airlines that fly from South Dakota to Illinois with momondo

Why use momondo?

Why should I use momondo to find a flight deal from South Dakota to Illinois?

Can I find flights from South Dakota to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from South Dakota to Illinois?

I’m not ready to book a flight from South Dakota to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo