$186+ Cheap flights from Sioux City (SUX) to Illinois
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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — ORD
Nov 21 — Nov 281
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Sioux City to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Sioux City to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Sioux City to IllinoisExplore the most affordable flight options available from Sioux City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2026.
Explore the most affordable flight options available from Sioux City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2026.
This United Airlines deal was found by Cheapflights users on 10/20. 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.
Thu 12/35:00 am -
Nonstop1h 59m
Sun 12/64:15 pm -
Nonstop1h 50m
Deal found 10/20![United Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 10/20. 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 10/256:00 am -
Nonstop1h 59m
Sun 11/14:20 pm -
Nonstop1h 50m
Deal found 10/20![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 10/17. 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 11/66:45 pm -
2 stops18h 15m
Sat 11/74:20 pm -
Nonstop1h 50m
Deal found 10/17![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/166:00 am -
Nonstop1h 59m
Mon 11/231:00 pm -
1 stop10h 43m
Deal found 10/20![United Airlines logo]()
$426
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 11/36:00 am -
Nonstop1h 59m
Sat 11/74:20 pm -
Nonstop1h 50m
Deal found 10/19![United Airlines logo]()
$456
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 10/276:00 am -
Nonstop1h 59m
Tue 11/34:20 pm -
Nonstop1h 50m
Deal found 10/19![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 10/21. 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 12/306:46 pm -
2 stops14h 14m
Sat 1/24:10 pm -
Nonstop2h 01m
Deal found 10/21![United Airlines logo]()
$488
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Thu 11/56:00 am -
Nonstop1h 59m
Mon 11/99:00 pm -
1 stop26h 43m
Deal found 10/21![United Airlines logo]()
$515
This United Airlines deal was found by Cheapflights users on 10/18. 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.
Tue 12/155:00 am -
Nonstop1h 59m
Tue 12/2910:00 pm -
1 stop25h 44m
Deal found 10/18![United Airlines logo]()
$542
Best flights from Sioux City to IllinoisDiscover carefully curated flight deals from Sioux City to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2026.
Discover carefully curated flight deals from Sioux City to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 22, 2026.
This United Airlines deal was found by Cheapflights users on 10/18. 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.
Thu 12/35:00 am -
Nonstop1h 59m
Sun 12/64:15 pm -
Nonstop1h 50m
Deal found 10/18![United Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 10/21. 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 1/305:04 am -
Nonstop2h 06m
Wed 2/34:10 pm -
Nonstop2h 01m
Deal found 10/21![United Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 10/17. 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.
Tue 2/25:04 am -
Nonstop2h 06m
Sat 2/64:10 pm -
Nonstop2h 01m
Deal found 10/17![United Airlines logo]()
$366
This United Airlines deal was found by Cheapflights users on 10/17. 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 11/66:45 pm -
2 stops18h 15m
Sat 11/74:20 pm -
Nonstop1h 50m
Deal found 10/17![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/166:00 am -
Nonstop1h 59m
Mon 11/231:00 pm -
1 stop10h 43m
Deal found 10/20![United Airlines logo]()
$426
This United Airlines deal was found by Cheapflights users on 10/21. 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 12/306:46 pm -
1 stop16h 33m
Sat 1/24:10 pm -
Nonstop2h 01m
Deal found 10/21![United Airlines logo]()
$474
Last-minute flights from Sioux City to IllinoisDiscover last-minute flight deals from Sioux City to Illinois. Data last updated October 22, 2026 and is based on user searches.
Discover last-minute flight deals from Sioux City to Illinois. Data last updated October 22, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/20. 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 10/256:00 am -
Nonstop1h 59m
Sun 11/14:20 pm -
Nonstop1h 50m
Deal found 10/20![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 10/276:00 am -
Nonstop1h 59m
Tue 11/34:20 pm -
Nonstop1h 50m
Deal found 10/19![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 11/36:00 am -
Nonstop1h 59m
Sat 11/74:20 pm -
Nonstop1h 50m
Deal found 10/19![United Airlines logo]()
$456
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Thu 11/56:00 am -
Nonstop1h 59m
Mon 11/99:00 pm -
1 stop26h 43m
Deal found 10/21![United Airlines logo]()
$515
This United Airlines deal was found by Cheapflights users on 10/17. 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 11/66:45 pm -
2 stops18h 15m
Sat 11/74:20 pm -
Nonstop1h 50m
Deal found 10/17![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/66:00 am -
Nonstop1h 59m
Sun 11/84:20 pm -
Nonstop1h 50m
Deal found 10/19![United Airlines logo]()
$595
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/166:00 am -
Nonstop1h 59m
Mon 11/231:00 pm -
1 stop10h 43m
Deal found 10/20![United Airlines logo]()
$426
This United Airlines deal was found by Cheapflights users on 10/18. 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 11/216:00 am -
Nonstop1h 59m
Sun 11/2911:29 am -
Nonstop1h 50m
Deal found 10/18![United Airlines logo]()
$579
One-way flights from Sioux City to IllinoisSearch for one-way flight options from Sioux City to Illinois. Find affordable one-way fares based on user searches. Data last updated October 22, 2026.
Search for one-way flight options from Sioux City to Illinois. Find affordable one-way fares based on user searches. Data last updated October 22, 2026.
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Thu 11/56:00 am -
Nonstop1h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![United Airlines logo]()
$186
This United Airlines deal was found by Cheapflights users on 10/21. 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 10/286:00 am -
Nonstop1h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![United Airlines logo]()
$276
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/66:00 am -
Nonstop1h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![United Airlines logo]()
$413
Find flight deals from Sioux City to Illinois
Keep the following information in mind while searching for Sioux City to Illinois flight deals. Data was last updated October 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (United Airlines) |
One-way from | $186 (United Airlines) |
Good round-trip deal | $445 or less |
Good one-way deal | $185 or less |
Cheapflights 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, Cheapflights users made 7,457,451 searches. Data last updated October 22, 2026.
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
Cheapest round-trip
Quickest round-trip
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Wed 10/28
6:00 am-7:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$276
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Thu 12/3
5:00 am-6:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Sun 12/6
4:15 pm-6:05 pm
Nonstop1h 50m
$286
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Sat 1/30
5:04 am-7:10 am
Nonstop2h 06m
Chicago O'Hare Intl
Wed 2/3
4:10 pm-6:11 pm
Nonstop2h 01m
$325
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Tue 2/2
5:04 am-7:10 am
Nonstop2h 06m
Chicago O'Hare Intl
Sat 2/6
4:10 pm-6:11 pm
Nonstop2h 01m
$366
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Fri 11/6
6:00 am-7:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$413
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Fri 11/6
6:45 pm-1:00 pm
2 stops18h 15m
Chicago O'Hare Intl
Sat 11/7
4:20 pm-6:10 pm
Nonstop1h 50m
$419
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Mon 11/16
6:00 am-7:59 am
Nonstop1h 59m
Chicago O'Hare Intl
Mon 11/23
1:00 pm-11:43 pm
1 stop10h 43m
$426
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Thu 11/5
6:45 pm-11:59 pm
1 stop5h 14m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$460
Sioux CityChicago
SUX Sioux City Sioux Gateway - ORD Chicago O'Hare Intl
SUXORD
Sioux City Sioux Gateway
Wed 12/30
6:46 pm-11:19 am
1 stop16h 33m
Chicago O'Hare Intl
Sat 1/2
4:10 pm-6:11 pm
Nonstop2h 01m
$474
Sorted by cheapest first
Best time to book a flight from Sioux City to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Sioux City with our price prediction graph.
SUX-ORD
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 Illinois
SUX-USIL
SUX-ORD
What is the cheapest time of day to fly from SUX to IL?
Find hourly flight availability from Sioux City to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2026.
When flying from Sioux City to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated October 22, 2026.
Read reviews from past customers who have flown United Airlines from Sioux City to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.1
Overall
7.3
Crew
8.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Entertainment
7.1
Overall
7.3
Crew
8.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Related info for your journey
Find useful and relevant information for your journey from Sioux City to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Sioux City to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Sioux City to Illinois by cabin class
Find flights from Sioux City to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Sioux City and Illinois flights
Browse other Sioux City and Illinois flight options. Last updated on October 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Sioux City to Illinois flights
Consider these flights traveling from Sioux City to Illinois.
Top airline flying from Sioux City to Illinois
Discover the top airline that operate flights from Sioux City to Illinois. 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 7,457,451 searches. Data last updated October 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$224 | Average$397 | FlexibilityNo cancel fee | On-time69% |