Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to Sioux City from $204

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Sioux City departing on 5/16. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
4:15 pm - 6:06 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
12:55 pm - 2:40 pm
SUX
-
ORD
1h 45mnonstop
$204United Airlines
Sat, May 16 - Sun, May 17
United Airlines Logo
3:50 pm - 5:41 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
12:55 pm - 2:40 pm
SUX
-
ORD
1h 45mnonstop
$245United Airlines
Thu, Mar 26 - Sun, Mar 29
United Airlines Logo
4:05 pm - 5:56 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
12:55 pm - 2:40 pm
SUX
-
ORD
1h 45mnonstop
$265United Airlines
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
3:50 pm - 5:41 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
12:55 pm - 2:40 pm
SUX
-
ORD
1h 45mnonstop
$355United Airlines
Fri, Mar 27 - Mon, Mar 30
United Airlines Logo
10:45 pm - 11:44 pm
ORD
-
SUX
24h 59m
2 stops
United Airlines Logo
12:55 pm - 2:40 pm
SUX
-
ORD
1h 45mnonstop
$378United Airlines
Thu, Apr 2 - Sun, Apr 5
United Airlines Logo
4:05 pm - 5:56 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
6:00 am - 5:40 am
SUX
-
ORD
23h 40m
2 stops
$387United Airlines
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
4:05 pm - 5:56 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
6:00 am - 8:14 pm
SUX
-
ORD
14h 14m
1 stop
$388United Airlines
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
11:03 pm - 11:44 pm
ORD
-
SUX
24h 41m
1 stop
United Airlines Logo
12:55 pm - 2:40 pm
SUX
-
ORD
1h 45mnonstop
$391United Airlines
Thu, Apr 2 - Sun, Apr 5
United Airlines Logo
3:50 pm - 5:41 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
12:53 pm - 2:40 pm
SUX
-
ORD
1h 47mnonstop
$416United Airlines
Fri, Mar 13 - Tue, Mar 17
United Airlines Logo
4:15 pm - 6:06 pm
ORD
-
SUX
1h 51mnonstop
United Airlines Logo
6:42 pm - 11:10 am
SUX
-
ORD
16h 28m
1 stop
$427United Airlines
Fri, May 8 - Sun, May 10

United Airlines flights from Illinois to Sioux City

Our best United Airlines deals on Illinois to Sioux City flight tickets
United Airlines
Mar 26
ORD3:50 pmChicago O'Hare Intl
1h 51m
SUX5:41 pmSioux City Sioux Gateway
Mar 29
SUX12:55 pmSioux City Sioux Gateway
1h 45m
ORD2:40 pmChicago O'Hare Intl
$245
United Airlines
Mar 31
ORD4:05 pmChicago O'Hare Intl
1h 51m
SUX5:56 pmSioux City Sioux Gateway
Apr 7
SUX12:55 pmSioux City Sioux Gateway
1h 45m
ORD2:40 pmChicago O'Hare Intl
$265
United Airlines
Jun 9
ORD4:00 pmChicago O'Hare Intl
1h 54m
SUX5:54 pmSioux City Sioux Gateway
Jun 12
SUX7:53 amSioux City Sioux Gateway
1h 52m
ORD9:45 amChicago O'Hare Intl
$326

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 March 2, 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

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Sat 5/16

4:15 pm-6:06 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Sun 5/17

12:55 pm-2:40 pm

Nonstop1h 45m

$204

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 3/26

3:50 pm-5:41 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Sun 3/29

12:55 pm-2:40 pm

Nonstop1h 45m

$245

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 3/31

4:05 pm-5:56 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Tue 4/7

12:55 pm-2:40 pm

Nonstop1h 45m

$265

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 3/27

3:50 pm-5:41 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Mon 3/30

12:55 pm-2:40 pm

Nonstop1h 45m

$355

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 4/2

10:45 pm-11:44 pm

2 stops24h 59m

Sioux City Sioux Gateway

Sun 4/5

12:55 pm-2:40 pm

Nonstop1h 45m

$378

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 3/31

4:05 pm-5:56 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Tue 4/7

6:00 am-5:40 am

2 stops23h 40m

$387

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Tue 3/31

4:05 pm-5:56 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Tue 4/7

6:00 am-8:14 pm

1 stop14h 14m

$388

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Thu 4/2

11:03 pm-11:44 pm

1 stop24h 41m

Sioux City Sioux Gateway

Sun 4/5

12:55 pm-2:40 pm

Nonstop1h 45m

$391

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 3/13

3:50 pm-5:41 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Tue 3/17

12:53 pm-2:40 pm

Nonstop1h 47m

$416

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

Fri 5/8

4:15 pm-6:06 pm

Nonstop1h 51m

Sioux City Sioux Gateway

Sun 5/10

6:42 pm-11:10 am

1 stop16h 28m

$427

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 $481.

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 $265. 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 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

$354

Fastest flight time

1h 51m

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 $354
The fastest flight from Illinois to Sioux City takes 1h 51m
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 in Sioux City. From Illinois there are direct flights to 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 $204Free CancellationRating
7.4
9,375 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.

An easier way to manage your Sioux City 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 4/1
Wed 4/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States