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Sioux City

$204+ Cheap flights from Illinois to Sioux City (SUX)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SUX
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheap flight deals from Illinois to Sioux City

Keep the following information in mind while searching for Illinois to Sioux City flight deals. Data was last updated septiembre 15, 2025.

Round-trip from

$204
(United Airlines)

Popular in

June

Cheapest in

December

Average price

$405

Good round-trip deal

$472 or less
From Illinois to Sioux City Sioux Gateway
Search Deals
Highest demand for flights based on searches. 33% potential increase in price ($198 potential increase over avg. RT price).
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Cheapest flight prices on average. 15% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to Sioux City Sioux Gateway.
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Find flight deals from Illinois to Sioux City

Cheapest flights from Illinois to Sioux City
Explore the most affordable flight options available from Illinois to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/109:08 pmORD - SUX
Nonstop1h 52mUnited Airlines
lun. 10/137:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Deal found 9/15$204
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/79:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
dom. 11/97:45 amSUX - ORD
Nonstop1h 47mUnited Airlines
Deal found 9/14$244
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/99:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
dom. 12/217:50 amSUX - ORD
Nonstop1h 55mUnited Airlines
Deal found 9/14$245
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/159:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
lun. 11/177:45 amSUX - ORD
Nonstop1h 47mUnited Airlines
Deal found 9/14$265
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/39:08 pmORD - SUX
Nonstop1h 52mUnited Airlines
dom. 10/57:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Deal found 9/15$326
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/87:30 amORD - SUX
2 stops10h 38mUnited Airlines
dom. 11/97:45 amSUX - ORD
Nonstop1h 47mUnited Airlines
Deal found 9/14$327
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/147:25 amORD - SUX
2 stops10h 43mUnited Airlines
mar. 11/187:45 amSUX - ORD
Nonstop1h 47mUnited Airlines
Deal found 9/14$350
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/239:08 pmORD - SUX
Nonstop1h 52mUnited Airlines
lun. 10/277:45 amSUX - ORD
Nonstop1h 47mUnited Airlines
Deal found 9/15$355

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated septiembre 15, 2025.
Use the filters below to find and compare flights from Illinois to Sioux City that are best for you.

Fly from

Illinois

Fly to

Sioux City

Route

Depart

Return

Price

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

vie. 10/10

9:08 pm-11:00 pm

Nonstop1h 52m

Sioux City Sioux Gateway

lun. 10/13

7:50 am-9:41 am

Nonstop1h 51m

$204

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

sáb. 11/8

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

dom. 11/9

7:45 am-9:32 am

Nonstop1h 47m

$244

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

mar. 12/9

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

dom. 12/21

7:50 am-9:45 am

Nonstop1h 55m

$244

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

sáb. 11/15

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

mar. 11/18

7:45 am-9:32 am

Nonstop1h 47m

$265

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

sáb. 11/15

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

lun. 11/17

7:45 am-9:32 am

Nonstop1h 47m

$265

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

vie. 10/3

9:08 pm-11:00 pm

Nonstop1h 52m

Sioux City Sioux Gateway

dom. 10/5

7:50 am-9:41 am

Nonstop1h 51m

$326

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

sáb. 11/8

9:10 pm-10:59 pm

Nonstop1h 49m

Sioux City Sioux Gateway

mar. 11/11

6:46 pm-11:36 am

2 stops16h 50m

$347

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

dom. 10/5

9:08 pm-11:00 pm

Nonstop1h 52m

$251

ChicagoSioux City

ORD - SUX

ORDSUX

Chicago O'Hare Intl

dom. 9/21

8:08 pm-6:13 pm

1 stop22h 05m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from Illinois to Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Sioux City

What is the cheapest month to book a flight from Illinois to Sioux City?

Currently, October is the cheapest month in which you can book a flight from Illinois to Sioux City (average of $318). Flying from Illinois to Sioux City in March is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to SUX?

Find hourly flight availability from Illinois to Sioux City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Sioux City as you normally would.

Weekly flight availability from Illinois to Sioux City

Explore weekly flight availability from Illinois to Sioux City. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated septiembre 15, 2025.

The most flights from USIL to SUX are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Illinois to Sioux City?

Related info for your journey

Find useful and relevant information for your journey from Illinois to Sioux City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sioux City from Illinois?

    For a flight from Illinois to Sioux City, you will be flying into Sioux Gateway. Sioux City Sioux Gateway (SUX) is just 7.0 mi from the center of the city.

  • How long is the flight from Illinois to Sioux City?

    United Airlines can get you from Illinois to Sioux City in just under 1h 52m. Your travel time will be generally consistent. The distance from Illinois to Sioux City is about 435 mi. All flights are typically nonstop.

  • What are the cheapest flights from Illinois to Sioux City?

    While on average a flight from Illinois to Sioux City is generally $490, our data shows the cheapest flight currently is $416. When looking at the most popular route, (Chicago O'Hare Intl - Sioux City Sioux Gateway), you can expect to pay $204 for that flight.

  • Can I find deals for flights from Illinois to Sioux City that include hotel bookings?

    Yes. In addition to deals on Illinois to Sioux City flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Sioux City?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Sioux City.

  • Can I find deals for business class flights from Illinois to Sioux City?

    Yes. Cheapflights offers flight deals from Illinois to Sioux City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Sioux City?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Sioux City (average of $318). Flying from Illinois to Sioux City in March is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Illinois to Sioux City

Discover the top airline that operate flights from Illinois to Sioux City. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$416FlexibilityNo cancel feeOn-time69%

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