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Cheap flights from Illinois to Sioux City from $161

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 3/15. 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
0 bags

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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
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
United Airlines Logo
7:45 am - 9:32 amSUX-ORD
1h 47mnonstop
$204United Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 3
United Airlines Logo
9:08 pm - 11:00 pmORD-SUX
1h 52mnonstop
United Airlines Logo
7:45 am - 9:32 amSUX-ORD
1h 47mnonstop
$239United Airlines
Find Deal
Thu, Oct 23 - Sun, Oct 26
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
United Airlines Logo
7:45 am - 9:32 amSUX-ORD
1h 47mnonstop
$244United Airlines
Find Deal
Fri, Nov 14 - Fri, Nov 21
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
United Airlines Logo
7:50 am - 9:45 amSUX-ORD
1h 55mnonstop
$245United Airlines
Find Deal
Tue, Dec 9 - Sun, Dec 21
United Airlines Logo
9:08 pm - 11:00 pmORD-SUX
1h 52mnonstop
United Airlines Logo
7:45 am - 9:32 amSUX-ORD
1h 47mnonstop
$285United Airlines
Find Deal
Thu, Oct 23 - Sun, Oct 26
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
United Airlines Logo
7:50 am - 9:45 amSUX-ORD
1h 55mnonstop
$286United Airlines
Find Deal
Tue, Dec 9 - Sun, Dec 21
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
United Airlines Logo
7:45 am - 9:32 amSUX-ORD
1h 47mnonstop
$326United Airlines
Find Deal
Wed, Nov 5 - Fri, Nov 7
United Airlines Logo
6:10 pm - 6:10 pmORD-SUX
24h 00m2 stops
United Airlines Logo
7:50 am - 9:45 amSUX-ORD
1h 55mnonstop
$350United Airlines
Find Deal
Tue, Dec 9 - Sun, Dec 21
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
United Airlines Logo
6:46 pm - 7:40 pmSUX-ORD
24h 54m1 stop
$352United Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 3
United Airlines Logo
6:15 pm - 6:10 pmORD-SUX
23h 55m1 stop
United Airlines Logo
7:50 am - 9:45 amSUX-ORD
1h 55mnonstop
$353United Airlines
Find Deal
Tue, Dec 9 - Sun, Dec 21

United Airlines flights from Illinois to Sioux City

Our best United Airlines deals on Illinois to Sioux City flight tickets
United Airlines
Oct 27
ORD9:10 pmChicago O'Hare Intl
1h 49m
SUX10:59 pmSioux City Sioux Gateway
Nov 3
SUX7:45 amSioux City Sioux Gateway
1h 47m
ORD9:32 amChicago O'Hare Intl
$204
Find similar
United Airlines
Oct 23
ORD9:08 pmChicago O'Hare Intl
1h 52m
SUX11:00 pmSioux City Sioux Gateway
Oct 26
SUX7:45 amSioux City Sioux Gateway
1h 47m
ORD9:32 amChicago O'Hare Intl
$239
Find similar
United Airlines
Nov 14
ORD9:10 pmChicago O'Hare Intl
1h 49m
SUX10:59 pmSioux City Sioux Gateway
Nov 21
SUX7:45 amSioux City Sioux Gateway
1h 47m
ORD9:32 amChicago O'Hare Intl
$244
Find similar

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 October 1, 2025.
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

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Mon 10/27

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

Mon 11/3

7:45 am-9:32 am

Nonstop1h 47m

$204

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 10/23

9:08 pm-11:00 pm

Nonstop1h 52m

Sioux City Sioux Gateway

Sun 10/26

7:45 am-9:32 am

Nonstop1h 47m

$239

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 11/14

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

Fri 11/21

7:45 am-9:32 am

Nonstop1h 47m

$244

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 12/9

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

Sun 12/21

7:50 am-9:45 am

Nonstop1h 55m

$245

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 10/23

9:08 pm-11:00 pm

Nonstop1h 52m

Sioux City Sioux Gateway

Sun 10/26

7:45 am-9:32 am

Nonstop1h 47m

$285

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 12/9

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

Sun 12/21

7:50 am-9:45 am

Nonstop1h 55m

$286

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Wed 11/5

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

Fri 11/7

7:45 am-9:32 am

Nonstop1h 47m

$326

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 12/9

6:10 pm-6:10 pm

2 stops24h 00m

Sioux City Sioux Gateway

Sun 12/21

7:50 am-9:45 am

Nonstop1h 55m

$350

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Mon 10/27

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

Mon 11/3

6:46 pm-7:40 pm

1 stop24h 54m

$352

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 12/9

6:15 pm-6:10 pm

1 stop23h 55m

Sioux City Sioux Gateway

Sun 12/21

7:50 am-9:45 am

Nonstop1h 55m

$353

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 month to fly to Sioux City?

The cheapest month to fly to Sioux City from Illinois is in December. Flight prices, which tend to average around $188, are often lower during this time because this is during the off-season. The month of November is another great option to travel to Sioux City, with average flight prices from Illinois averaging around $273.

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 $306. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday 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 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 Sioux Gateway flights?

There is only 1 cabin class available to choose from on Illinois to Sioux City Sioux Gateway 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

Best Price Found

$490

Fastest flight time

1h 49m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Sioux City

1 airport
The best flight deal from Illinois to Sioux City found on momondo in the last 72 hours is $490
The fastest flight from Illinois to Sioux City takes 1h 49m
Direct flights go from Illinois to Sioux City on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport near Sioux City: Sioux City Sioux Gateway (SUX)
Search flight deals

  • 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 $214Free CancellationRating
7.4
8,929 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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