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Cheap flights from Sioux City to Illinois from $166

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Illinois departing on 11/28. 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

United Airlines Logo
7:49 am - 9:40 amSUX-ORD
1h 51mnonstop
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$278United Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
United Airlines Logo
7:50 am - 9:41 amSUX-ORD
1h 51mnonstop
United Airlines Logo
9:08 pm - 11:00 pmORD-SUX
1h 52mnonstop
$326United Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 15
United Airlines Logo
6:48 pm - 1:11 pmSUX-ORD
18h 23m2 stops
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$331United Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
United Airlines Logo
7:49 am - 9:40 amSUX-ORD
1h 51mnonstop
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$339United Airlines
Find Deal
Tue, Aug 19 - Sat, Aug 23
United Airlines Logo
6:48 pm - 9:41 amSUX-ORD
14h 53m1 stop
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$346United Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
United Airlines Logo
7:49 am - 9:40 amSUX-ORD
1h 51mnonstop
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$352United Airlines
Find Deal
Thu, Sep 18 - Mon, Sep 22
United Airlines Logo
7:49 am - 9:40 amSUX-ORD
1h 51mnonstop
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$355United Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
United Airlines Logo
6:48 pm - 6:55 pmSUX-ORD
24h 07m2 stops
United Airlines Logo
9:05 pm - 10:57 pmORD-SUX
1h 52mnonstop
$364United Airlines
Find Deal
Sat, Aug 23 - Mon, Aug 25
United Airlines Logo
7:50 am - 9:41 amSUX-ORD
1h 51mnonstop
United Airlines Logo
7:25 am - 6:14 pmORD-SUX
10h 49m2 stops
$387United Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 15
United Airlines Logo
6:46 pm - 1:03 pmSUX-ORD
18h 17m2 stops
United Airlines Logo
9:10 pm - 10:59 pmORD-SUX
1h 49mnonstop
$410United Airlines
Find Deal
Fri, Nov 14 - Fri, Nov 21

United Airlines flights from Sioux City to Illinois

Our best United Airlines deals on Sioux City to Illinois flight tickets
United Airlines
Sep 2
SUX7:49 amSioux City Sioux Gateway
1h 51m
ORD9:40 amChicago O'Hare Intl
Sep 9
ORD9:05 pmChicago O'Hare Intl
1h 52m
SUX10:57 pmSioux City Sioux Gateway
$278
Find similar
United Airlines
Oct 14
SUX7:50 amSioux City Sioux Gateway
1h 51m
ORD9:41 amChicago O'Hare Intl
Oct 15
ORD9:08 pmChicago O'Hare Intl
1h 52m
SUX11:00 pmSioux City Sioux Gateway
$326
Find similar
United Airlines
Sep 2
SUX6:48 pmSioux City Sioux Gateway
18h 23m
2 stops
ORD1:11 pmChicago O'Hare Intl
Sep 9
ORD9:05 pmChicago O'Hare Intl
1h 52m
SUX10:57 pmSioux City Sioux Gateway
$331
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 August 5, 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

Tue 9/2

7:49 am-9:40 am

Nonstop1h 51m

Chicago O'Hare Intl

Tue 9/9

9:05 pm-10:57 pm

Nonstop1h 52m

$278

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Tue 10/14

7:50 am-9:41 am

Nonstop1h 51m

Chicago O'Hare Intl

Wed 10/15

9:08 pm-11:00 pm

Nonstop1h 52m

$326

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Tue 9/2

6:48 pm-1:11 pm

2 stops18h 23m

Chicago O'Hare Intl

Tue 9/9

9:05 pm-10:57 pm

Nonstop1h 52m

$331

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Tue 8/19

7:49 am-9:40 am

Nonstop1h 51m

Chicago O'Hare Intl

Sat 8/23

9:05 pm-10:57 pm

Nonstop1h 52m

$339

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Tue 9/2

6:48 pm-9:41 am

1 stop14h 53m

Chicago O'Hare Intl

Tue 9/9

9:05 pm-10:57 pm

Nonstop1h 52m

$346

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Thu 9/18

7:49 am-9:40 am

Nonstop1h 51m

Chicago O'Hare Intl

Mon 9/22

9:05 pm-10:57 pm

Nonstop1h 52m

$352

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 8/23

7:49 am-9:40 am

Nonstop1h 51m

Chicago O'Hare Intl

Mon 8/25

9:05 pm-10:57 pm

Nonstop1h 52m

$355

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 8/23

6:48 pm-6:55 pm

2 stops24h 07m

Chicago O'Hare Intl

Mon 8/25

9:05 pm-10:57 pm

Nonstop1h 52m

$364

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Tue 10/14

7:50 am-9:41 am

Nonstop1h 51m

Chicago O'Hare Intl

Wed 10/15

7:25 am-6:14 pm

2 stops10h 49m

$387

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 11/14

6:46 pm-1:03 pm

2 stops18h 17m

Chicago O'Hare Intl

Fri 11/21

9:10 pm-10:59 pm

Nonstop1h 49m

$410

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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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 month to fly to Illinois?

The cheapest month to fly to Illinois from Sioux City is in December. Flight prices, which tend to average around $260, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of December, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $265.

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 $356. Flights from Sioux City to Illinois on a Sunday will generally be more expensive and average around $656. 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

$166

Fastest flight time

1h 47m

Direct flights

Tue, Wed, 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 $166. The best round-trip flight deal from Sioux City to Illinois found on momondo in the last 72 hours is $278.
The fastest flight from Sioux City to Illinois takes 1h 47m
Direct flights go from Sioux City to Illinois on Tuesday, Wednesday, 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
8,916 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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