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

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

How long is the flight from Illinois to South Dakota?

The flight from Illinois to South Dakota depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Chicago (a popular airport in Illinois) to Sioux Falls (the most popular airport in South Dakota), then the flight time is 2h 47m on average. If you fly from Moline (another popular airport in Illinois) to Sioux Falls, then the average flight time is 7h 51m.

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

As of December 2025, 10 flights take off from Illinois and land in South Dakota each day. The most common flight departure time for this route is 8:00AM, with 46% of daily flights taking off in the afternoon.

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

As of December 2025, 74 flights take off from Illinois and land in South Dakota each week. The most common flight departure day for this route is Mon, with 24% of weekly flights taking off on this day.

What airlines fly to South Dakota?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to South Dakota from Illinois according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to South Dakota. Keep in mind that there are 4 different airlines that fly to South Dakota on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Illinois to South Dakota were last updated today.

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

As of December 2025, there are 3 operators available to choose from for flights from Illinois to South Dakota.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to South Dakota.

What documentation or ID do you need to fly to South Dakota?

The travel and health documents you'll need for your trip to South Dakota 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 South Dakota. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$103 Cheap Flights from Illinois to South Dakota in 2025/26

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Find the cheapest flights from Illinois to South Dakota

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One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 pm - 9:35 pm

ORD

FSD

2h 00mnonstop

6:15 pm - 8:13 pm

FSD

ORD

1h 58mnonstop

$189American Airlines

vie., ene. 23 - jue., ene. 29

4:48 pm - 6:40 pm

ORD

FSD

1h 52mnonstop

7:29 pm - 9:30 pm

FSD

ORD

2h 01mnonstop

$190American Airlines

sáb., ene. 3 - lun., ene. 5

8:13 am - 10:11 am

ORD

FSD

1h 58mnonstop

7:29 pm - 9:30 pm

FSD

ORD

2h 01mnonstop

$204American Airlines

sáb., ene. 3 - lun., ene. 5

12:50 pm - 9:57 am

MDW

FSD

21h 07m1 stop

8:26 pm - 2:05 pm

FSD

MDW

17h 39m1 stop

$206Multiple Airlines

jue., ene. 8 - dom., ene. 11

6:15 am - 12:22 pm

ORD

FSD

6h 07m1 stop

1:02 pm - 5:55 pm

FSD

ORD

4h 53m1 stop

$209Delta

vie., ene. 23 - jue., ene. 29

1:49 pm - 7:30 pm

MDW

FSD

5h 41m1 stop

5:00 am - 9:08 am

FSD

MDW

4h 08m1 stop

$209Delta

vie., ene. 9 - dom., ene. 11

6:50 am - 3:37 pm

ORD

FSD

8h 47m2 stops

1:07 pm - 5:55 pm

FSD

ORD

4h 48m1 stop

$214Delta

sáb., ene. 31 - lun., feb. 2

1:55 pm - 8:32 pm

ORD

RAP

7h 37m1 stop

5:10 am - 11:34 am

RAP

ORD

5h 24m1 stop

$229United Airlines

dom., feb. 1 - sáb., feb. 7

6:00 pm - 11:44 pm

STL

FSD

5h 44m1 stop

1:40 pm - 8:58 pm

FSD

STL

7h 18m1 stop

$233United Airlines

jue., ene. 15 - mar., ene. 20

6:10 am - 8:41 pm

MDW

FSD

14h 31m2 stops

8:26 pm - 2:05 pm

FSD

MDW

17h 39m1 stop

$334Multiple Airlines

vie., ene. 9 - dom., ene. 11

American Airlines flights from Illinois to South Dakota

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

American Airlines

Jan 23

ORD7:35 pmChicago O'Hare Intl

2h 00m

FSD9:35 pmSioux Falls Joe Foss Field

Jan 29

FSD6:15 pmSioux Falls Joe Foss Field

1h 58m

ORD8:13 pmChicago O'Hare Intl

$189

Find similar

American Airlines

Jan 3

ORD4:48 pmChicago O'Hare Intl

1h 52m

FSD6:40 pmSioux Falls Joe Foss Field

Jan 5

FSD7:29 pmSioux Falls Joe Foss Field

2h 01m

ORD9:30 pmChicago O'Hare Intl

$190

Find similar

American Airlines

Jan 3

ORD8:13 amChicago O'Hare Intl

1h 58m

FSD10:11 amSioux Falls Joe Foss Field

Jan 5

FSD7:29 pmSioux Falls Joe Foss Field

2h 01m

ORD9:30 pmChicago O'Hare Intl

$204

Find similar

United Airlines flights from Illinois to South Dakota

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

United Airlines

Feb 1

ORD1:55 pmChicago O'Hare Intl

7h 37m

1 stop

RAP8:32 pmRapid City

Feb 7

RAP5:10 amRapid City

5h 24m

1 stop

ORD11:34 amChicago O'Hare Intl

$229

Find similar

United Airlines

Jan 15

STL6:00 pmLambert-St Louis

5h 44m

1 stop

FSD11:44 pmSioux Falls Joe Foss Field

Jan 20

FSD1:40 pmSioux Falls Joe Foss Field

7h 18m

1 stop

STL8:58 pmLambert-St Louis

$233

Find similar

United Airlines

Mar 5

ORD7:00 amChicago O'Hare Intl

7h 13m

1 stop

RAP1:13 pmRapid City

Mar 9

RAP5:41 pmRapid City

5h 12m

1 stop

ORD11:53 pmChicago O'Hare Intl

$241

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

vie. 1/23

7:35 pm-9:35 pm

Nonstop2h 00m

Sioux Falls Joe Foss Field

jue. 1/29

6:15 pm-8:13 pm

Nonstop1h 58m

$189

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

sáb. 1/3

4:48 pm-6:40 pm

Nonstop1h 52m

Sioux Falls Joe Foss Field

lun. 1/5

7:29 pm-9:30 pm

Nonstop2h 01m

$190

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

sáb. 1/3

8:13 am-10:11 am

Nonstop1h 58m

Sioux Falls Joe Foss Field

lun. 1/5

7:29 pm-9:30 pm

Nonstop2h 01m

$204

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

jue. 1/8

12:50 pm-9:57 am

1 stop21h 07m

Sioux Falls Joe Foss Field

dom. 1/11

8:26 pm-2:05 pm

1 stop17h 39m

$206

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

vie. 1/23

6:15 am-12:22 pm

1 stop6h 07m

Sioux Falls Joe Foss Field

jue. 1/29

1:02 pm-5:55 pm

1 stop4h 53m

$209

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

vie. 1/9

1:49 pm-7:30 pm

1 stop5h 41m

Sioux Falls Joe Foss Field

dom. 1/11

5:00 am-9:08 am

1 stop4h 08m

$209

ChicagoSioux Falls

ORD - FSD

ORDFSD

Chicago O'Hare Intl

sáb. 1/31

6:50 am-3:37 pm

2 stops8h 47m

Sioux Falls Joe Foss Field

lun. 2/2

1:07 pm-5:55 pm

1 stop4h 48m

$214

ChicagoRapid City

ORD - RAP

ORDRAP

Chicago O'Hare Intl

dom. 2/1

1:55 pm-8:32 pm

1 stop7h 37m

Rapid City

sáb. 2/7

5:10 am-11:34 am

1 stop5h 24m

$229

St. LouisSioux Falls

STL - FSD

STLFSD

Lambert-St Louis

jue. 1/15

6:00 pm-11:44 pm

1 stop5h 44m

Sioux Falls Joe Foss Field

mar. 1/20

1:40 pm-8:58 pm

1 stop7h 18m

$233

ChicagoSioux Falls

MDW - FSD

MDWFSD

Chicago Midway

vie. 1/9

6:10 am-8:41 pm

2 stops14h 31m

Sioux Falls Joe Foss Field

dom. 1/11

8:26 pm-2:05 pm

1 stop17h 39m

$334

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

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 South Dakota?

The month of September is, on average, the cheapest month to fly to South Dakota from Illinois, with most prices found around $215. If you aren’t able to travel to South Dakota during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $229.

What is the cheapest day to depart on your flight to South Dakota?

The cheapest day to depart from Illinois to South Dakota is on a Saturday. Travelers who choose to depart for South Dakota on a Saturday will often find tickets for as low as $274. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $427. These prices are subject to change though, so be sure to set up a Price Alert for flights to South Dakota.

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

The cheapest time of day to fly to South Dakota is at noon when flights can be purchased for as low as $199. In the morning is when there is more demand to fly to South Dakota, so prices are often more expensive at around $349 per ticket.

What is the cheapest Illinois to South Dakota flight route?

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

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

There are 3 cabin classes available to choose from on Illinois to South Dakota 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 Illinois to South Dakota flights?

You could potentially save up to 18% on your flight if you consider stops on a Illinois to South Dakota flight.

Cheap Illinois to South Dakota flight deals and tips

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

Best Price Found	$213
Fastest flight time	1h 46m
Direct flights	Every day
Airports in South Dakota	20 airports

The best one-way flight to South Dakota from Illinois in the past 72 hours is $213. The best round-trip flight deal from Illinois to South Dakota found on momondo in the last 72 hours is $249.

The fastest flight from Illinois to South Dakota takes 1h 46m

Direct flights go from Illinois to South Dakota every day.

There are 20 airports in South Dakota. From Illinois there are direct flights to Rapid City (RAP), Sioux Falls Joe Foss Field (FSD).

Search flight deals

When did momondo last update prices for flights from Illinois to South Dakota?
Prices for flights from Illinois to South Dakota were last updated today.
How many operators does momondo search for flights from Illinois to South Dakota?
As of December 2025, there are 3 operators available to choose from for flights from Illinois to South Dakota.
How old do you have to be to fly from Illinois to South Dakota?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to South Dakota.
What documentation or ID do you need to fly to South Dakota?
The travel and health documents you'll need for your trip to South Dakota 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 South Dakota. 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 Illinois to South Dakota?
Based on momondo bookings for flights between Illinois and South Dakota, the leading plane model is Canadair (Bombardier) Regional Jet CRJ-550, making up 21.63% of the total bookings. Other popular models include Canadair (Bombardier) Regional Jet 700 with 18.50%, Boeing 737-800 with 17.55%, and Embraer 175 (Enhanced Winglets) with 14.11%.

Best airlines flying from Illinois to South Dakota

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

Airline	Rating	Free Cancellation	Price
Denver Air Connection	PriceFrom $164	Free Cancellation	Rating 8.7 20 reviews	Search Denver Air Connection flights
American Airlines	PriceFrom $189	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
United Airlines	PriceFrom $194	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
Delta	PriceFrom $228	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to South Dakota. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Illinois to South Dakota flights to just show those with flexible booking policies.

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

Once you have performed a search for Illinois to South Dakota flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to South Dakota, momondo offers a useful price alert feature which will track prices for flights to South Dakota from Illinois and alert you when they change.

An easier way to manage your South Dakota 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 South Dakota

Popular cities in South Dakota

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Cheap flights from Illinois to South Dakota from $103

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to South Dakota departing on 1/9. 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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Filter for what you want

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Find the cheapest flights from Illinois to South Dakota

Cheap round-trip flights

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American Airlines flights from Illinois to South Dakota

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

United Airlines flights from Illinois to South Dakota

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

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

What is the cheapest month to fly to South Dakota?

What is the cheapest day to depart on your flight to South Dakota?

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

The cheapest time of day to fly to South Dakota is at noon when flights can be purchased for as low as $199. In the morning is when there is more demand to fly to South Dakota, so prices are often more expensive at around $349 per ticket.

What is the cheapest Illinois to South Dakota flight route?

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

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

There are 3 cabin classes available to choose from on Illinois to South Dakota 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 Illinois to South Dakota flights?

You could potentially save up to 18% on your flight if you consider stops on a Illinois to South Dakota flight.

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

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

What airlines fly to South Dakota?

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

As of December 2025, 10 flights take off from Illinois and land in South Dakota each day. The most common flight departure time for this route is 8:00AM, with 46% of daily flights taking off in the afternoon.

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

As of December 2025, 74 flights take off from Illinois and land in South Dakota each week. The most common flight departure day for this route is Mon, with 24% of weekly flights taking off on this day.

How long is the flight from Illinois to South Dakota?

Cheap Illinois to South Dakota flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in South Dakota

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

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

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

What documentation or ID do you need to fly to South Dakota?

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

Best airlines flying from Illinois to South Dakota

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

Why use momondo?

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

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

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

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

An easier way to manage your South Dakota 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 South Dakota

Popular cities in South Dakota

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