$316+ Cheap flights from Sioux City to Ontario (SUX - ONT)
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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — ONT
Oct 21 — Oct 281
Round-trip
1 adult, Economy
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Find cheap flights from Sioux City to Ontario 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 Ontario
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Best
Last-minute
One-way
Cheapest flights from Sioux City to OntarioExplore the most affordable flight options available from Sioux City to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 21, 2026.
Explore the most affordable flight options available from Sioux City to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 21, 2026.
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Sat 10/316:00 am -
2 stops8h 33m
Sat 11/77:00 am -
1 stop9h 10m
Deal found 9/17![United Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 9/20. 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 10/226:58 pm -
1 stop28h 00m
Mon 10/265:00 am -
1 stop16h 43m
Deal found 9/20![United Airlines logo]()
$646
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/16:58 pm -
1 stop28h 00m
Mon 10/57:00 am -
1 stop8h 53m
Deal found 9/16![United Airlines logo]()
$837
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/158:35 am -
1 stop16h 14m
Sun 10/185:00 am -
1 stop16h 43m
Deal found 9/19![United Airlines logo]()
$1,521
Best flights from Sioux City to OntarioDiscover carefully curated flight deals from Sioux City to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 21, 2026.
Discover carefully curated flight deals from Sioux City to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 21, 2026.
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Sat 10/316:00 am -
2 stops8h 33m
Sat 11/77:00 am -
1 stop9h 10m
Deal found 9/17![United Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 9/20. 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 10/226:58 pm -
1 stop28h 00m
Mon 10/265:00 am -
1 stop16h 43m
Deal found 9/20![United Airlines logo]()
$646
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/16:58 pm -
1 stop28h 00m
Mon 10/57:00 am -
1 stop8h 53m
Deal found 9/16![United Airlines logo]()
$837
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/158:35 am -
1 stop16h 14m
Sun 10/185:00 am -
1 stop16h 43m
Deal found 9/19![United Airlines logo]()
$1,521
Last-minute flights from Sioux City to OntarioDiscover last-minute flight deals from Sioux City to Ontario. Data last updated September 21, 2026 and is based on user searches.
Discover last-minute flight deals from Sioux City to Ontario. Data last updated September 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/16:58 pm -
1 stop28h 00m
Mon 10/57:00 am -
1 stop8h 53m
Deal found 9/16![United Airlines logo]()
$837
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/158:35 am -
1 stop16h 14m
Sun 10/185:00 am -
1 stop16h 43m
Deal found 9/19![United Airlines logo]()
$1,521
This United Airlines deal was found by Cheapflights users on 9/20. 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 10/226:58 pm -
1 stop28h 00m
Mon 10/265:00 am -
1 stop16h 43m
Deal found 9/20![United Airlines logo]()
$646
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Sat 10/316:00 am -
2 stops8h 33m
Sat 11/77:00 am -
1 stop9h 10m
Deal found 9/17![United Airlines logo]()
$465
One-way flights from Sioux City to OntarioSearch for one-way flight options from Sioux City to Ontario. Find affordable one-way fares based on user searches. Data last updated September 21, 2026.
Search for one-way flight options from Sioux City to Ontario. Find affordable one-way fares based on user searches. Data last updated September 21, 2026.
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/236:58 pm -
1 stop28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$316
This United Airlines deal was found by Cheapflights users on 9/19. 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.
Mon 10/196:58 pm -
2 stops17h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$351
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/226:58 pm -
1 stop28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 9/20. 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 10/56:58 pm -
1 stop19h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 9/19. 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.
Sun 10/256:45 pm -
1 stop28h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$426
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/96:58 pm -
1 stop28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$431
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/86:58 pm -
1 stop28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![United Airlines logo]()
$470
Find flight deals from Sioux City to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Sioux City (SUX) to Ontario (ONT). 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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $465 (United Airlines) |
One-way from | $316 (United Airlines) |
Popular in | October |
Cheapest in | November |
Average price | $398 |
Cheapflights Fare Finder
Customize your flight search to find flights from Sioux City to Ontario 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 September 21, 2026.
Use the filters below to find and compare flights from Sioux City to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Fri 10/23
6:58 pm-8:58 pm
1 stop28h 00m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$316
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Mon 10/5
6:58 pm-12:46 pm
1 stop19h 48m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$381
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Thu 10/22
6:58 pm-9:59 pm
2 stops29h 01m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$434
Quickest round-trip
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Sat 10/31
6:00 am-12:33 pm
2 stops8h 33m
Ontario
Sat 11/7
7:00 am-6:10 pm
1 stop9h 10m
$465
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Thu 10/1
8:35 am-3:22 pm
2 stops32h 47m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$521
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Thu 10/8
6:58 pm-12:18 pm
2 stops19h 20m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$591
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Thu 10/22
6:58 pm-8:58 pm
1 stop28h 00m
Ontario
Mon 10/26
5:00 am-11:43 pm
1 stop16h 43m
$646
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Thu 10/1
6:58 pm-8:58 pm
1 stop28h 00m
Ontario
Mon 10/5
7:00 am-5:53 pm
1 stop8h 53m
$837
Sioux CityOntario
SUX Sioux City Sioux Gateway - ONT Ontario
SUXONT
Sioux City Sioux Gateway
Thu 10/15
8:35 am-10:49 pm
1 stop16h 14m
Ontario
Sun 10/18
5:00 am-11:43 pm
1 stop16h 43m
$1,521
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Sioux City-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sioux City-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sioux City-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Sioux City-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sioux City-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Sioux City to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Sioux City with our price prediction graph.
SUX-ONT
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.
Related info for your journey
Find useful and relevant information for your journey from Sioux City to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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