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$166+ Cheap flights from Sioux City (SUX) to Chicago (CHI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — CHI
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Sioux City to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Sioux City (SUX) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 15, 2025.

Round-trip from

$244
(United Airlines)

One-way from

$166
(United Airlines)

Popular in

May

Cheapest in

December

Good round-trip deal

$336 or less

Good one-way deal

$300 or less
From Sioux City Sioux Gateway to Chicago (CHI)
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One-way flight from Sioux City Sioux Gateway to Chicago (CHI)
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Highest demand for flights based on searches. 6% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Price to beat on a round-trip flight from Sioux City Sioux Gateway to Chicago (CHI).
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Price to beat on a one-way flight from Sioux City Sioux Gateway to Chicago (CHI).
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Find flight deals from Sioux City to Chicago

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

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.
Mon 10/137:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Thu 11/139:10 pmORD - SUX
Nonstop1h 49mUnited 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.
Mon 10/137:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Tue 11/119:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
Deal found 9/14$265
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.
Sun 10/127:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Sat 11/159:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
Deal found 9/14$326
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 10/36:51 pmSUX - ORD
2 stops12h 52mUnited Airlines
Mon 10/69:08 pmORD - SUX
Nonstop1h 52mUnited Airlines
Deal found 9/12$329
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Wed 9/177:49 amSUX - ORD
Nonstop1h 51mUnited Airlines
Tue 9/309:08 pmORD - SUX
Nonstop1h 52mUnited Airlines
Deal found 9/13$340
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.
Sun 10/126:51 pmSUX - ORD
2 stops25h 29mUnited Airlines
Thu 11/139:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
Deal found 9/14$348
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.
Mon 10/137:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Fri 11/146:10 pmORD - SUX
2 stops23h 58mUnited Airlines
Deal found 9/14$350
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.
Mon 10/137:50 amSUX - ORD
Nonstop1h 51mUnited Airlines
Mon 11/109:30 pmORD - SUX
1 stop20h 38mUnited Airlines
Deal found 9/14$357
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Sat 10/256:51 pmSUX - ORD
2 stops14h 50mUnited Airlines
Sun 10/269:10 pmORD - SUX
Nonstop1h 49mUnited Airlines
Deal found 9/12$365

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux City to Chicago 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 September 15, 2025.
Use the filters below to find and compare flights from Sioux City to Chicago that are best for you.

Fly from

Sioux City

Fly to

Chicago

Route

Depart

Return

Price

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Mon 10/13

7:50 am-9:41 am

Nonstop1h 51m

Chicago O'Hare Intl

Thu 11/13

9:10 pm-10:59 pm

Nonstop1h 49m

$244

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 2/28

12:45 pm-2:40 pm

Nonstop1h 55m

Chicago O'Hare Intl

Wed 3/4

3:35 pm-5:32 pm

Nonstop1h 57m

$265

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sun 11/9

7:45 am-9:32 am

Nonstop1h 47m

Chicago O'Hare Intl

Sun 11/9

9:10 pm-10:59 pm

Nonstop1h 49m

$326

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 11/7

7:45 am-9:32 am

Nonstop1h 47m

Chicago O'Hare Intl

Sun 11/9

9:10 pm-10:59 pm

Nonstop1h 49m

$326

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Mon 10/13

7:50 am-9:41 am

Nonstop1h 51m

Chicago O'Hare Intl

Tue 11/11

8:10 pm-6:08 pm

2 stops21h 58m

$327

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 10/3

6:51 pm-1:12 pm

1 stop18h 21m

Chicago O'Hare Intl

Mon 10/6

9:08 pm-11:00 pm

Nonstop1h 52m

$342

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Sat 10/25

7:50 am-9:41 am

Nonstop1h 51m

Chicago O'Hare Intl

Sun 10/26

9:10 pm-10:59 pm

Nonstop1h 49m

$355

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 10/17

6:51 pm-2:55 pm

1 stop20h 04m

Chicago O'Hare Intl

Thu 11/13

9:10 pm-10:59 pm

Nonstop1h 49m

$357

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Mon 10/13

7:50 am-9:41 am

Nonstop1h 51m

Chicago O'Hare Intl

Mon 11/10

9:30 pm-6:08 pm

1 stop20h 38m

$357

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Mon 10/13

6:51 pm-7:43 am

2 stops12h 52m

Chicago O'Hare Intl

Sat 11/15

9:10 pm-10:59 pm

Nonstop1h 49m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 12 results
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Best time to book a flight from Sioux City to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Sioux City 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 Sioux City to Chicago

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

Currently, August is the cheapest month in which you can book a flight from Sioux City to Chicago (average of $245). Flying from Sioux City to Chicago in March is currently the most expensive (average of $321). 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 SUX to CHI?

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

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

Weekly flight availability from Sioux City to Chicago

Explore weekly flight availability from Sioux City to Chicago. 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 September 15, 2025.

The most flights from SUX to CHI 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).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chicago. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with United Airlines from Sioux City to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Sioux City to Chicago. 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 from for flights from Sioux City to Chicago?

    Located just 7.0 mi from the city center, Sioux City Sioux Gateway is the airport most travelers will use when flying to Chicago from Sioux City. Booking flights from Sioux Gateway (SUX) to Chicago should be relatively easy as there is 1 daily outbound flight to Chicago from 1 airline.

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

    For as low as $244, United Airlines can have you in Chicago from Sioux City in 1h 51m. The distance between Sioux City and Chicago is about 435 mi. All flights are typically nonstop.

  • What is the cheapest airline to fly from Sioux City to Chicago round-trip?

    Our cheapest airline available from Sioux City to Chicago is United Airlines. Our recent data shows that you can find tickets from as low as $219 on this airline. United Airlines is priced at 31% lower than the current average price of a flight leaving 3 months from now.

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

    Looking at all options, your cheapest flight can be booked for $197. While the most popular route (Sioux City Sioux Gateway - Chicago O'Hare Intl) can be booked for $265 on average, our data indicates $393 when flying from Sioux City to Chicago.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Sioux City to Chicago 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 Sioux City to Chicago?

    Currently, August is the cheapest month in which you can book a flight from Sioux City to Chicago (average of $245). Flying from Sioux City to Chicago in March is currently the most expensive (average of $321). 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

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
Lansing
Hammond
Benton Harbor
Porter
Chesterton

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Alternative routes for Sioux City to Chicago

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Top airline flying from Sioux City to Chicago

Discover the top airline that operate flights from Sioux City to Chicago. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$219Average$307FlexibilityNo cancel feeOn-time69%

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