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$139+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ONT
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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Cheap 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 septiembre 17, 2025.

Round-trip from

$144
(Booking.com)

One-way from

$139
(Trip.com)

Popular in

September

Cheapest in

May

Average price

$1,019
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. 36% potential increase in price ($252 potential increase over avg. RT price).
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Cheapest flight prices on average. 14% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 17, 2025.

This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/32:54 pmFSD - ONT
1 stop7h 00mFrontier
dom. 10/58:59 pmONT - FSD
1 stop15h 10mFrontier
Deal found 9/16$144
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/302:23 pmFSD - ONT
1 stop11h 27mFrontier
dom. 11/25:53 amONT - FSD
1 stop4h 45mFrontier
Deal found 9/16$175
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/282:54 pmFSD - ONT
1 stop18h 59mFrontier
jue. 10/28:59 pmONT - FSD
1 stop15h 10mFrontier
Deal found 9/16$181
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/302:23 pmFSD - ONT
1 stop11h 27mFrontier
jue. 11/66:53 amONT - FSD
1 stop4h 45mFrontier
Deal found 9/15$184
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/312:32 pmFSD - ONT
1 stop11h 18mFrontier
dom. 11/96:53 amONT - FSD
1 stop4h 45mFrontier
Deal found 9/15$189
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/62:54 pmFSD - ONT
1 stop9h 19mFrontier
lun. 10/136:53 amONT - FSD
1 stop9h 40mFrontier
Deal found 9/14$193
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/32:32 pmFSD - ONT
1 stop11h 18mFrontier
jue. 11/66:53 amONT - FSD
1 stop4h 45mFrontier
Deal found 9/15$224
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/212:54 pmFSD - ONT
1 stop18h 59mFrontier
jue. 9/258:59 pmONT - FSD
1 stop15h 10mFrontier
Deal found 9/16$228
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/312:32 pmFSD - ONT
1 stop11h 18mFrontier
lun. 11/106:53 amONT - FSD
1 stop4h 54mFrontier
Deal found 9/15$229
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/93:19 pmFSD - ONT
1 stop10h 31mFrontier
lun. 10/136:53 amONT - FSD
1 stop9h 40mFrontier
Deal found 9/14$231
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/22:23 pmFSD - ONT
1 stop11h 27mFrontier
dom. 11/96:53 amONT - FSD
1 stop4h 45mFrontier
Deal found 9/15$233

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 septiembre 17, 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

vie. 10/3

2:54 pm-7:54 pm

1 stop7h 00m

Ontario

dom. 10/5

8:59 pm-2:09 pm

1 stop15h 10m

$144

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

dom. 9/28

2:54 pm-7:53 am

1 stop18h 59m

Ontario

jue. 10/2

8:59 pm-2:09 pm

1 stop15h 10m

$181

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

jue. 10/30

2:23 pm-11:50 pm

1 stop11h 27m

Ontario

jue. 11/6

6:53 am-1:38 pm

1 stop4h 45m

$184

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

vie. 10/10

7:28 pm-7:49 am

2 stops14h 21m

Ontario

lun. 10/13

6:53 am-6:33 pm

1 stop9h 40m

$260

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

sáb. 11/1

5:20 am-12:14 pm

2 stops8h 54m

Ontario

sáb. 11/8

9:50 am-7:19 pm

2 stops7h 29m

$279

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

mar. 10/28

5:20 am-12:16 pm

2 stops8h 56m

Ontario

sáb. 11/8

9:50 am-7:19 pm

2 stops7h 29m

$279

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

vie. 10/31

10:56 am-9:20 pm

2 stops12h 24m

Ontario

sáb. 11/8

9:50 am-7:19 pm

2 stops7h 29m

$293

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

mar. 10/7

8:16 am-12:01 pm

1 stop5h 45m

Ontario

mar. 10/14

6:15 am-2:14 pm

1 stop5h 59m

$306

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

jue. 10/2

3:12 pm-10:30 pm

1 stop9h 18m

Ontario

dom. 10/5

5:05 am-12:51 pm

1 stop5h 46m

$319

Sioux FallsOntario

FSD - ONT

FSDONT

Sioux Falls Joe Foss Field

vie. 10/31

2:32 pm-11:50 pm

1 stop11h 18m

Ontario

vie. 11/7

6:53 am-1:47 pm

1 stop4h 54m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 21 results
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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, August is the cheapest month in which you can book a flight from Sioux Falls to Ontario (average of $246). Flying from Sioux Falls to Ontario in March is currently the most expensive (average of $327). 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 septiembre 17, 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 afternoon could potentially save you up to 35% on airfare.

How much does it cost to fly round-trip from Sioux Falls to Ontario?

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 septiembre 17, 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
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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?

    Frontier can get you from Sioux Falls to Ontario in just under 7h. Your travel time can differ by up to . Sioux Falls and Ontario are separated by a distance of 1295 mi.

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

    Our cheapest airline available from Sioux Falls to Ontario is American Airlines. Our recent data shows that you can find tickets from as low as $274 on this airline. An additional option worth looking into is United Airlines, starting at $283. American Airlines is 38% 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, August is the cheapest month in which you can book a flight from Sioux Falls to Ontario (average of $246). Flying from Sioux Falls to Ontario in March is currently the most expensive (average of $327). 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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Alternative routes for Sioux Falls to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$274Average$383FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$283Average$411FlexibilityNo cancel feeOn-time69%

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