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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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — CHI
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$204
(United Airlines)

One-way from

$166
(United Airlines)

Popular in

May

Cheapest in

September

Average price

$384

Good round-trip deal

$333 or less

Good one-way deal

$233 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. 9% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/2. 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 8/1610:10 amSUX - ORD
Nonstop1h 44mUnited Airlines
Wed 8/209:05 pmORD - SUX
Nonstop1h 52mUnited Airlines
Deal found 7/2$204

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 July 3, 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

Sat 8/16

10:10 am-11:54 am

Nonstop1h 44m

Chicago O'Hare Intl

Wed 8/20

9:05 pm-10:57 pm

Nonstop1h 52m

$204

Sioux CityChicago

SUX - ORD

SUXORD

Sioux City Sioux Gateway

Fri 9/12

7:49 am-9:40 am

Nonstop1h 51m

$166

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 July 3, 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 July 3, 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).

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

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 July 3, 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
8,861 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.0

Boarding

7.7

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
8,861 reviews
United Airlines
7.4
Good
8,861 reviews

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Entertainment

7.0

Boarding

7.7

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.

  • 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 $204 on this airline. United Airlines is priced at 36% 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 $168. While the most popular route (Sioux City Sioux Gateway - Chicago O'Hare Intl) can be booked for $204 on average our data indicates $410 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 Sioux City?

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

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$219Average$299FlexibilityNo cancel feeOn-time69%

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