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$176+ Cheap flights from Sioux Falls to Ontario (FSD - ONT)

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 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ONT
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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Cheap flight deals from Sioux Falls to Ontario

Cheapest flights from Sioux Falls to Ontario
Explore the most affordable flight options available from Sioux Falls to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 9, 2025.

This United Airlines deal was found by Cheapflights users on 12/7. 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 12/159:00 amFSD - ONT
1 stop5h 32mUnited Airlines
Mon 1/121:24 pmONT - FSD
1 stop5h 00mUnited Airlines
Deal found 12/7$339
This American Airlines deal was found by Cheapflights users on 12/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/178:05 amFSD - ONT
1 stop5h 55mAmerican Airlines
Sat 12/204:44 pmONT - FSD
1 stop4h 55mAmerican Airlines
Deal found 12/8$383
This American Airlines deal was found by Cheapflights users on 12/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/161:09 pmFSD - ONT
1 stop7h 08mAmerican Airlines
Sun 12/216:20 amONT - FSD
1 stop6h 19mAmerican Airlines
Deal found 12/9$396
This Gotogate deal was found by Cheapflights users on 12/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:50 pmFSD - ONT
1 stop5h 09mFrontier
Mon 12/296:45 amONT - FSD
1 stop11h 10mFrontier
Deal found 12/9$442
This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:50 pmFSD - ONT
1 stop5h 09mFrontier
Mon 12/226:45 amONT - FSD
1 stop11h 10mFrontier
Deal found 12/6$443
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/205:12 pmFSD - ONT
1 stop5h 55mUnited Airlines
Sat 12/275:05 amONT - FSD
1 stop5h 45mUnited Airlines
Deal found 12/9$531

Find flight deals from Sioux Falls to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Sioux Falls (FSD) 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 December 9, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$269
(Delta)

One-way from

$176
(Frontier)

Popular in

December

Cheapest in

February

Average price

$623
Provider with most accurate pricing for Sioux Falls Joe Foss Field-Ontario flight deals.
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Provider most trusted by Cheapflights users for Sioux Falls Joe Foss Field-Ontario flights.
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From Sioux Falls Joe Foss Field to Ontario
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One-way flight from Sioux Falls Joe Foss Field to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux Falls 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 2,558,603 searches. Data last updated December 9, 2025.
Use the filters below to find and compare flights from Sioux Falls to Ontario that are best for you.

Fly from

Sioux Falls

Fly to

Ontario

Route

Depart

Return

Price

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Wed 1/21

9:00 am-12:47 pm

1 stop5h 47m

Ontario

Wed 1/28

1:24 pm-8:24 pm

1 stop5h 00m

$349

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Wed 1/28

11:22 am-10:53 pm

2 stops13h 31m

Ontario

Mon 2/2

5:05 am-12:58 pm

1 stop5h 53m

$354

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Wed 12/17

8:05 am-12:00 pm

1 stop5h 55m

Ontario

Sat 12/20

4:44 pm-11:39 pm

1 stop4h 55m

$383

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Tue 12/16

1:09 pm-6:17 pm

1 stop7h 08m

Ontario

Sun 12/21

6:20 am-2:39 pm

1 stop6h 19m

$396

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Wed 1/28

5:00 am-12:16 pm

2 stops9h 16m

Ontario

Mon 2/2

7:30 am-7:53 pm

2 stops10h 23m

$424

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Mon 12/15

8:00 am-10:49 pm

3 stops16h 49m

Ontario

Mon 1/12

6:39 pm-10:47 am

2 stops14h 08m

$434

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Wed 2/11

9:00 am-8:58 pm

1 stop13h 58m

Ontario

Sat 2/14

5:00 am-12:55 pm

1 stop5h 55m

$440

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Fri 12/19

8:50 pm-11:59 pm

1 stop5h 09m

Ontario

Mon 12/29

6:45 am-7:55 pm

1 stop11h 10m

$442

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Fri 1/2

8:50 pm-11:59 pm

1 stop5h 09m

$176

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

Fri 12/19

8:50 pm-11:59 pm

1 stop5h 09m

$271

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 15 results
1
2

Compare providers for flights from Sioux Falls to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sioux Falls to Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sioux Falls-Ontario flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Sioux Falls-Ontario flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Sioux Falls-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sioux Falls-Ontario flights, Cheapflights users trust CheapOair the most. CheapOair 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 Falls-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 Falls to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Sioux Falls 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 Falls to Ontario

What is the cheapest month to book a flight from Sioux Falls to Ontario?

Currently, July is the cheapest month in which you can book a flight from Sioux Falls to Ontario (average of $93). Flying from Sioux Falls to Ontario in December is currently the most expensive (average of $259). 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 FSD to ONT?

Find hourly flight availability from Sioux Falls to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 9, 2025.

One of the essential ways to save on airfare from Sioux Falls to Ontario is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 58% on airfare.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 9, 2025.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Sioux Falls to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
American Airlines
7.2
Good
11,048 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

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

  • How long is the flight from Sioux Falls to Ontario?

    United Airlines and American Airlines can get you from Sioux Falls to Ontario in just under 5h 47m. Your travel time can differ by up to 08m. Sioux Falls and Ontario are separated by a distance of 1295 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Sioux Falls to Ontario round-trip?

    Our cheapest airline available from Sioux Falls to Ontario is United Airlines. Our recent data shows that you can find tickets from as low as $268 on this airline. An additional option worth looking into is American Airlines, starting at $370. United Airlines is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Sioux Falls to Ontario that include hotel bookings?

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

  • How can I find direct flights from Sioux Falls to Ontario?

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

  • Can I find deals for business class flights from Sioux Falls to Ontario?

    Yes. Cheapflights offers flight deals from Sioux Falls to Ontario 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 Falls to Ontario?

    Currently, July is the cheapest month in which you can book a flight from Sioux Falls to Ontario (average of $93). Flying from Sioux Falls to Ontario in December is currently the most expensive (average of $259). 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.

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Top 2 airlines flying from Sioux Falls to Ontario

Discover the top 2 airlines that operate flights from Sioux Falls to Ontario. 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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$268Average$411FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$370Average$468FlexibilityNo cancel feeOn-time71%

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