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Cheap flights from Illinois to Sioux City from $171

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 Sioux City departing on 7/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Sioux City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$224United Airlines
Fri, Jul 17 - Sun, Jul 19
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$264United Airlines
Thu, Jul 9 - Sun, Jul 12
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$305United Airlines
Fri, Jun 26 - Mon, Jun 29
United Airlines Logo
4:00 pm - 5:54 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
9:03 am - 10:55 am
SUX
-
ORD
1h 52mnonstop
$346United Airlines
Tue, Nov 10 - Sat, Nov 14
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$395United Airlines
Sat, Jun 27 - Tue, Jun 30
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
11:32 am - 12:44 am
SUX
-
ORD
13h 12m
1 stop
$412United Airlines
Thu, Jul 9 - Tue, Jul 14
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$425United Airlines
Fri, Jul 10 - Fri, Jul 24
United Airlines Logo
5:00 am - 11:41 pm
ORD
-
SUX
18h 41m
1 stop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$436United Airlines
Fri, Jul 10 - Fri, Jul 24
United Airlines Logo
3:59 pm - 5:53 pm
ORD
-
SUX
1h 54mnonstop
United Airlines Logo
8:10 am - 10:02 am
SUX
-
ORD
1h 52mnonstop
$437United Airlines
Thu, Jun 25 - Tue, Jun 30
United Airlines Logo
8:00 pm - 6:11 pm
ORD
-
SUX
22h 11m
2 stops
United Airlines Logo
9:03 am - 10:55 am
SUX
-
ORD
1h 52mnonstop
$439United Airlines
Tue, Nov 10 - Sat, Nov 14

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United Airlines flights from Illinois to Sioux City

Our best United Airlines deals on Illinois to Sioux City flight tickets
United Airlines
Jul 17
ORD3:59 pmChicago O'Hare Intl
1h 54m
SUX5:53 pmSioux City Sioux Gateway
Jul 19
SUX8:10 amSioux City Sioux Gateway
1h 52m
ORD10:02 amChicago O'Hare Intl
$224
United Airlines
Jul 9
ORD3:59 pmChicago O'Hare Intl
1h 54m
SUX5:53 pmSioux City Sioux Gateway
Jul 13
SUX8:10 amSioux City Sioux Gateway
1h 52m
ORD10:02 amChicago O'Hare Intl
$264
United Airlines
Jun 26
ORD3:59 pmChicago O'Hare Intl
1h 54m
SUX5:53 pmSioux City Sioux Gateway
Jun 29
SUX8:10 amSioux City Sioux Gateway
1h 52m
ORD10:02 amChicago O'Hare Intl
$305

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Sioux City 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, momondo users made 832,500 searches. Data last updated June 10, 2026.
Use the filters below to find and compare flights from Illinois to Sioux City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 7/17

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Sun 7/19

8:10 am-10:02 am

Nonstop1h 52m

$224

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 7/9

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Sun 7/12

8:10 am-10:02 am

Nonstop1h 52m

$264

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 6/26

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Mon 6/29

8:10 am-10:02 am

Nonstop1h 52m

$305

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 11/10

4:00 pm-5:54 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Sat 11/14

9:03 am-10:55 am

Nonstop1h 52m

$346

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Sat 6/27

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Tue 6/30

8:10 am-10:02 am

Nonstop1h 52m

$395

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 7/9

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Tue 7/14

11:32 am-12:44 am

1 stop13h 12m

$412

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 7/10

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Fri 7/24

8:10 am-10:02 am

Nonstop1h 52m

$425

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 7/10

5:00 am-11:41 pm

1 stop18h 41m

Sioux City Sioux Gateway

Fri 7/24

8:10 am-10:02 am

Nonstop1h 52m

$436

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 6/25

3:59 pm-5:53 pm

Nonstop1h 54m

Sioux City Sioux Gateway

Tue 6/30

8:10 am-10:02 am

Nonstop1h 52m

$437

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 11/10

8:00 pm-6:11 pm

2 stops22h 11m

Sioux City Sioux Gateway

Sat 11/14

9:03 am-10:55 am

Nonstop1h 52m

$439

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sioux City from

How to get the cheapest flight ticket from Illinois to Sioux City

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 day to depart on your flight to Sioux City?

On average, the least expensive day to fly to Sioux City from Illinois is on a Friday. momondo users have found tickets for Friday departures for as low as $265. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $490.

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

The cheapest time of day to fly to Sioux City is in the afternoon when flights can be purchased for as low as $326. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $416 on average. Flights to Sioux City from Illinois in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Sioux City Sioux Gateway flight route?

Fly from Chicago O'Hare Intl to Sioux City Sioux Gateway for the best Illinois - Sioux City Sioux Gateway flight prices

What cabin class options are available on Illinois to Sioux City flights?

There is only 1 cabin class available to choose from on Illinois to Sioux City flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Illinois to Sioux City flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Sioux City

Fastest flight time

1h 54m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun

Airports in Sioux City

1 airport
The fastest flight from Illinois to Sioux City takes 1h 54m
Direct flights go from Illinois to Sioux City on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport in Sioux City. From Illinois there are direct flights to Sioux City Sioux Gateway (SUX).
Search flight deals

Frequently asked questions about flying from Illinois to Sioux City

  • When did momondo last update prices for flights from Illinois to Sioux City Sioux Gateway Airport?

    Prices for flights from Illinois to Sioux City Sioux Gateway Airport are updated daily.

  • How many operators does momondo search for flights from Illinois to Sioux City Sioux Gateway Airport?

  • How old do you have to be to fly from Illinois to Sioux City Sioux Gateway Airport?

    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 Illinois to Sioux City Sioux Gateway Airport.

  • What documentation or ID do you need to fly to Sioux City Sioux Gateway Airport?

    The required travel and health documents for your Sioux City Sioux Gateway Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sioux City Sioux Gateway Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to Sioux City?

Best airlines flying from Illinois to Sioux City

Compare and see reviews for airlines that fly from Illinois to Sioux City with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $204Free CancellationRating
7.4
9,804 reviews
Search United Airlines flights

Traveling to a place near Sioux City?

Book flights to Sioux City if you plan to visit one of these locations
Norfolk

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Sioux City?

It is quick and easy to find Illinois to Sioux City flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sioux City that suits you.

Can I find flights from Illinois to Sioux City with flexible booking policies on momondo?

Flights from Illinois to Sioux City with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Illinois to Sioux City?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Sioux City.

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

Yes. momondo can track prices for Illinois to Sioux City flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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