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Cheap flights from Sioux City to Illinois from $265

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Illinois departing on 3/6. 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 Sioux City to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:53 pm - 2:40 pmSUX-ORD
1h 47mnonstop
United Airlines Logo
3:50 pm - 5:41 pmORD-SUX
1h 51mnonstop
$265United Airlines
Find Deal
Fri, Mar 6 - Thu, Mar 12
United Airlines Logo
7:50 am - 9:37 amSUX-ORD
1h 47mnonstop
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
$326United Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
United Airlines Logo
1:00 pm - 2:47 pmSUX-ORD
1h 47mnonstop
United Airlines Logo
3:50 pm - 5:41 pmORD-SUX
1h 51mnonstop
$355United Airlines
Find Deal
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
1:00 pm - 2:47 pmSUX-ORD
1h 47mnonstop
United Airlines Logo
8:07 pm - 10:45 amORD-SUX
14h 38m1 stop
$368United Airlines
Find Deal
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
6:52 pm - 11:29 amSUX-ORD
16h 37m1 stop
United Airlines Logo
9:18 pm - 11:15 pmORD-SUX
1h 57mnonstop
$377United Airlines
Find Deal
Sat, Dec 13 - Sat, Dec 20
United Airlines Logo
6:10 am - 6:45 pmSUX-ORD
12h 35m1 stop
United Airlines Logo
3:50 pm - 5:41 pmORD-SUX
1h 51mnonstop
$391United Airlines
Find Deal
Fri, Mar 6 - Thu, Mar 12
United Airlines Logo
6:52 pm - 9:29 amSUX-ORD
14h 37m2 stops
United Airlines Logo
9:18 pm - 11:15 pmORD-SUX
1h 57mnonstop
$393United Airlines
Find Deal
Sat, Dec 13 - Sat, Dec 20
United Airlines Logo
7:50 am - 9:37 amSUX-ORD
1h 47mnonstop
United Airlines Logo
9:18 pm - 11:15 pmORD-SUX
1h 57mnonstop
$397United Airlines
Find Deal
Sat, Dec 13 - Sat, Dec 20
United Airlines Logo
6:30 pm - 9:20 amSUX-ORD
14h 50m2 stops
United Airlines Logo
3:50 pm - 5:41 pmORD-SUX
1h 51mnonstop
$416United Airlines
Find Deal
Fri, Mar 6 - Thu, Mar 12
United Airlines Logo
6:10 am - 11:52 pmSUX-ORD
17h 42m1 stop
United Airlines Logo
3:50 pm - 5:41 pmORD-SUX
1h 51mnonstop
$432United Airlines
Find Deal
Thu, Mar 12 - Sun, Mar 15

United Airlines flights from Sioux City to Illinois

Our best United Airlines deals on Sioux City to Illinois flight tickets
United Airlines
Mar 6
SUX12:53 pmSioux City Sioux Gateway
1h 47m
ORD2:40 pmChicago O'Hare Intl
Mar 12
ORD3:50 pmChicago O'Hare Intl
1h 51m
SUX5:41 pmSioux City Sioux Gateway
$265
Find similar
United Airlines
Dec 4
SUX7:50 amSioux City Sioux Gateway
1h 47m
ORD9:37 amChicago O'Hare Intl
Dec 7
ORD9:10 pmChicago O'Hare Intl
1h 49m
SUX10:59 pmSioux City Sioux Gateway
$326
Find similar
United Airlines
Nov 19
SUX7:45 amSioux City Sioux Gateway
1h 47m
ORD9:32 amChicago O'Hare Intl
Dec 5
ORD9:10 pmChicago O'Hare Intl
1h 49m
SUX10:59 pmSioux City Sioux Gateway
$340
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Sioux City to Illinois 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 November 17, 2025.
Use the filters below to find and compare flights from Sioux City to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 3/6

12:53 pm-2:40 pm

Nonstop1h 47m

Chicago O'Hare Intl

Thu 3/12

3:50 pm-5:41 pm

Nonstop1h 51m

$265

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Thu 12/4

7:50 am-9:37 am

Nonstop1h 47m

Chicago O'Hare Intl

Sun 12/7

9:10 pm-10:59 pm

Nonstop1h 49m

$326

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 2/28

1:00 pm-2:47 pm

Nonstop1h 47m

Chicago O'Hare Intl

Wed 3/4

3:50 pm-5:41 pm

Nonstop1h 51m

$355

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 2/28

1:00 pm-2:47 pm

Nonstop1h 47m

Chicago O'Hare Intl

Wed 3/4

8:07 pm-10:45 am

1 stop14h 38m

$368

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 12/13

6:52 pm-11:29 am

1 stop16h 37m

Chicago O'Hare Intl

Sat 12/20

9:18 pm-11:15 pm

Nonstop1h 57m

$377

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 3/6

6:10 am-6:45 pm

1 stop12h 35m

Chicago O'Hare Intl

Thu 3/12

3:50 pm-5:41 pm

Nonstop1h 51m

$391

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 12/13

6:52 pm-9:29 am

2 stops14h 37m

Chicago O'Hare Intl

Sat 12/20

9:18 pm-11:15 pm

Nonstop1h 57m

$393

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 12/13

7:50 am-9:37 am

Nonstop1h 47m

Chicago O'Hare Intl

Sat 12/20

9:18 pm-11:15 pm

Nonstop1h 57m

$397

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 3/6

6:30 pm-9:20 am

2 stops14h 50m

Chicago O'Hare Intl

Thu 3/12

3:50 pm-5:41 pm

Nonstop1h 51m

$416

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Thu 3/12

6:10 am-11:52 pm

1 stop17h 42m

Chicago O'Hare Intl

Sun 3/15

3:50 pm-5:41 pm

Nonstop1h 51m

$432

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Illinois from

How to get the cheapest flight ticket from Sioux City 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

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Sioux City to Illinois is on a Thursday when prices can be found for as low as $405. Flights from Sioux City to Illinois on a Sunday will generally be more expensive and average around $667. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

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

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

There are 2 cabin classes available to choose from on Sioux City Sioux Gateway 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 Sioux City to Illinois flights?

No. A direct flight is the cheapest option for a flight between Sioux City to Illinois.

Cheap Sioux City to Illinois flight deals and tips

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

Best Price Found

$202

Fastest flight time

1h 47m

Direct flights

Tue, Fri, Sat and Sun

Airports in Illinois

1 airport
The best one-way flight to Illinois from Sioux City in the past 72 hours is $202. The best round-trip flight deal from Sioux City to Illinois found on momondo in the last 72 hours is $302.
The fastest flight from Sioux City to Illinois takes 1h 47m
Direct flights go from Sioux City to Illinois on Tuesday, Friday, Saturday and Sunday. The only airline offering direct flights is United Airlines.
There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)
Search flight deals

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

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

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

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

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois 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 Illinois. 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 Sioux City to Illinois?

Best airlines flying from Sioux City to Illinois

Compare and see reviews for airlines that fly from Sioux City to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $219Free CancellationRating
7.4
9,014 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Sioux City 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 Sioux City to Illinois for you.

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

Yes. momondo enables you to select and highlight flights to Illinois from Sioux City with this policy.

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

Once you have performed a search for Sioux City to Illinois 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 Sioux City to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Sioux City. 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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