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

United Airlines, Delta, and Allegiant Air 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 127 per week as of March 2026. The most frequent departure day is Mon, with 19% of weekly flights leaving on this day.

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

As of March 2026, there are 18 flights per day flying from South Dakota to Illinois. The most common time of day flights depart is 12:00PM, with 64% of flights taking off in the afternoon.

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 42m 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 23m.

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 March 2026.

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.

$108 Cheap Flights from South Dakota to Illinois in 2026

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Find the cheapest flights from South Dakota to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 6:08 am

FSD

ORD

15h 33m

1 stop

5:05 am - 5:21 pm

ORD

FSD

12h 16m

1 stop

$228Multiple Airlines

Wed, Apr 29 - Fri, May 1

6:11 pm - 9:36 am

FSD

ORD

15h 25m

1 stop

1:00 pm - 5:21 pm

ORD

FSD

28h 21m

1 stop

$248Multiple Airlines

Fri, May 1 - Sun, May 3

6:52 am - 8:54 am

FSD

ORD

2h 02mnonstop

9:11 pm - 11:06 pm

ORD

FSD

1h 55mnonstop

$249American Airlines

Thu, May 7 - Sun, May 10

5:28 pm - 11:48 pm

FSD

ORD

6h 20m

1 stop

9:16 pm - 11:11 pm

ORD

FSD

1h 55mnonstop

$258American Airlines

Fri, Apr 17 - Sun, Apr 19

1:41 pm - 9:45 pm

FSD

ORD

8h 04m

1 stop

5:11 pm - 7:09 pm

ORD

FSD

1h 58mnonstop

$259American Airlines

Thu, May 7 - Sun, May 10

1:35 pm - 5:56 pm

FSD

MDW

4h 21m

1 stop

1:49 pm - 7:38 pm

MDW

FSD

5h 49m

1 stop

$269Delta

Sat, Jun 6 - Fri, Jun 12

1:35 pm - 7:20 pm

FSD

ORD

5h 45m

1 stop

8:42 am - 12:49 pm

ORD

FSD

4h 07m

1 stop

$269Delta

Thu, May 7 - Sun, May 10

11:40 am - 2:53 pm

RAP

ORD

2h 13mnonstop

8:05 pm - 9:46 pm

ORD

RAP

2h 41mnonstop

$284United Airlines

Mon, Apr 27 - Mon, May 4

1:35 pm - 4:59 pm

RAP

ORD

2h 24mnonstop

8:45 am - 10:24 am

ORD

RAP

2h 39mnonstop

$285United Airlines

Fri, Jun 12 - Sun, Jun 28

4:29 pm - 7:23 pm

FSD

STL

26h 54m

1 stop

8:08 pm - 3:44 pm

STL

FSD

19h 36m

1 stop

$356Frontier

Mon, Jun 1 - Thu, Jun 4

American Airlines flights from South Dakota to Illinois

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

American Airlines

May 7

FSD6:52 amSioux Falls Joe Foss Field

2h 02m

ORD8:54 amChicago O'Hare Intl

May 10

ORD9:11 pmChicago O'Hare Intl

1h 55m

FSD11:06 pmSioux Falls Joe Foss Field

$249

American Airlines

Apr 17

FSD5:28 pmSioux Falls Joe Foss Field

6h 20m

1 stop

ORD11:48 pmChicago O'Hare Intl

Apr 19

ORD9:16 pmChicago O'Hare Intl

1h 55m

FSD11:11 pmSioux Falls Joe Foss Field

$258

American Airlines

May 7

FSD1:41 pmSioux Falls Joe Foss Field

8h 04m

1 stop

ORD9:45 pmChicago O'Hare Intl

May 10

ORD5:11 pmChicago O'Hare Intl

1h 58m

FSD7:09 pmSioux Falls Joe Foss Field

$259

United Airlines flights from South Dakota to Illinois

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

United Airlines

Apr 11

FSD6:10 amSioux Falls Joe Foss Field

1h 50m

ORD8:00 amChicago O'Hare Intl

Apr 17

ORD9:50 pmChicago O'Hare Intl

1h 54m

FSD11:44 pmSioux Falls Joe Foss Field

$264

United Airlines

Jun 6

FSD6:00 amSioux Falls Joe Foss Field

1h 58m

ORD7:58 amChicago O'Hare Intl

Jun 13

ORD8:09 pmChicago O'Hare Intl

1h 58m

FSD10:07 pmSioux Falls Joe Foss Field

$276

United Airlines

Apr 10

FSD6:53 pmSioux Falls Joe Foss Field

1h 57m

ORD8:50 pmChicago O'Hare Intl

Apr 14

ORD9:50 pmChicago O'Hare Intl

1h 54m

FSD11:44 pmSioux Falls Joe Foss Field

$279

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 4/29

2:35 pm-6:08 am

1 stop15h 33m

Chicago O'Hare Intl

Fri 5/1

5:05 am-5:21 pm

1 stop12h 16m

$228

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 5/1

6:11 pm-9:36 am

1 stop15h 25m

Chicago O'Hare Intl

Sun 5/3

1:00 pm-5:21 pm

1 stop28h 21m

$248

Quickest round-trip

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 5/7

6:52 am-8:54 am

Nonstop2h 02m

Chicago O'Hare Intl

Sun 5/10

9:11 pm-11:06 pm

Nonstop1h 55m

$249

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 4/17

5:28 pm-11:48 pm

1 stop6h 20m

Chicago O'Hare Intl

Sun 4/19

9:16 pm-11:11 pm

Nonstop1h 55m

$258

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 5/7

1:41 pm-9:45 pm

1 stop8h 04m

Chicago O'Hare Intl

Sun 5/10

5:11 pm-7:09 pm

Nonstop1h 58m

$259

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Sat 6/6

1:35 pm-5:56 pm

1 stop4h 21m

Chicago Midway

Fri 6/12

1:49 pm-7:38 pm

1 stop5h 49m

$269

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 5/7

1:35 pm-7:20 pm

1 stop5h 45m

Chicago O'Hare Intl

Sun 5/10

8:42 am-12:49 pm

1 stop4h 07m

$269

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Mon 4/27

11:40 am-2:53 pm

Nonstop2h 13m

Chicago O'Hare Intl

Mon 5/4

8:05 pm-9:46 pm

Nonstop2h 41m

$284

Rapid CityChicago

RAP - ORD

RAPORD

Rapid City

Fri 6/12

1:35 pm-4:59 pm

Nonstop2h 24m

Chicago O'Hare Intl

Sun 6/28

8:45 am-10:24 am

Nonstop2h 39m

$285

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 6/1

4:29 pm-7:23 pm

1 stop26h 54m

Lambert-St Louis

Thu 6/4

8:08 pm-3:44 pm

1 stop19h 36m

$356

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 September. Flight prices, which tend to average around $244, 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 September, then flying in January 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 $404. Flights from South Dakota to Illinois on a Monday will generally be more expensive and average around $631. 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 $374. Flights in the afternoon are often more expensive with an average ticket price of $487.

What is the cheapest South Dakota to Illinois flight route?

Fly from Rapid City 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 $297 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 $195 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	$228
Fastest flight time	1h 42m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from South Dakota in the past 72 hours is $228. The best round-trip flight deal from South Dakota to Illinois found on momondo in the last 72 hours is $359.

The fastest flight from South Dakota to Illinois takes 1h 42m

Direct flights go from South Dakota to Illinois every day.

There are 98 airports in Illinois. From South Dakota there are direct flights to Chicago O'Hare Intl (ORD).

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 March 2026.
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 (18.88% of total bookings). The next most popular plane models are Embraer 170 (16.60%), Embraer 175 (14.59%), and Boeing 737-800 (13.52%).

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
American Airlines	PriceFrom $189	Free Cancellation	Rating 7.1 11,530 reviews		Search American Airlines flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 9,514 reviews		Search United Airlines 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.

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Popular cities in Illinois

Flights to New Yorkfrom $48

Flights to Los Angelesfrom $53

Flights to Orlandofrom $55

Flights to Miamifrom $55

Flights to Chicagofrom $59

Flights to San Franciscofrom $68

Flights to Las Vegasfrom $54

Flights to Washington, D.C.from $56

Flights to Bostonfrom $76

Flights to Atlantafrom $50

Flights to Dallasfrom $55

Flights to Fort Lauderdalefrom $56

Cheap flights from South Dakota to Illinois from $108

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 4/27. 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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American Airlines flights from South Dakota to Illinois

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

United Airlines flights from South Dakota to Illinois

Our best United Airlines 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.

See travel insights to Illinois from

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

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?

What is the cheapest South Dakota to Illinois flight route?

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

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

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

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

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

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

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

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?

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

South Dakota flight routes

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year

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