ONT - FSD

$126 Find Cheap Flights from Ontario to Sioux Falls

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Sioux Falls departing on 7/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sioux Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Sioux Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Sioux Falls, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$240
Typical prices: $358-$545
Frontier
Wed 7/29Wed 8/5
ONT - FSD • 1 stop
Cheapest one-way
$126
Frontier
Wed 7/29
ONT - FSD • 1 stop
Top airlines
Cheapest • from $240 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Sioux Falls. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $396 (round-trip)
Shortest trip • 5h 47m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 44% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sioux Falls!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Sioux Falls (ONT-FSD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Sioux Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Sioux Falls

Wed, Jul 29 - Wed, Aug 5
Frontier Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Frontier Logo
8:08 pm - 11:50 pm
FSD
-
ONT
5h 42m
1 stop
$240Frontier
Wed, Aug 5 - Fri, Aug 14
Frontier Logo
10:49 am - 7:23 pm
ONT
-
FSD
6h 34m
1 stop
Frontier Logo
8:08 pm - 11:50 pm
FSD
-
ONT
5h 42m
1 stop
$250Frontier
Mon, Aug 10 - Mon, Aug 24
Frontier Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Frontier Logo
8:56 pm - 11:50 pm
FSD
-
ONT
4h 54m
1 stop
$260Frontier
Wed, Jul 15 - Wed, Jul 22
Frontier Logo
10:49 am - 7:23 pm
ONT
-
FSD
6h 34m
1 stop
Frontier Logo
8:08 pm - 11:50 pm
FSD
-
ONT
5h 42m
1 stop
$265Frontier
Mon, Jul 13 - Fri, Jul 17
Frontier Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Frontier Logo
8:08 pm - 11:50 pm
FSD
-
ONT
5h 42m
1 stop
$280Frontier
Wed, Jul 22 - Wed, Jul 29
Frontier Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Frontier Logo
8:08 pm - 10:04 am
FSD
-
ONT
15h 56m
1 stop
$295Frontier
Fri, Jul 17 - Fri, Jul 24
Frontier Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Frontier Logo
8:08 pm - 11:50 pm
FSD
-
ONT
5h 42m
1 stop
$324Frontier
Wed, Jul 22 - Mon, Aug 3
Multiple Airlines Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Multiple Airlines Logo
11:41 am - 12:53 pm
FSD
-
ONT
27h 12m
2 stops
$344Multiple Airlines
Wed, Jul 22 - Mon, Aug 3
Multiple Airlines Logo
6:00 am - 7:23 pm
ONT
-
FSD
11h 23m
1 stop
Multiple Airlines Logo
11:41 am - 12:53 pm
FSD
-
ONT
27h 12m
2 stops
$346Multiple Airlines
Sat, Aug 15 - Sat, Aug 22
American Airlines Logo
10:29 am - 8:31 pm
ONT
-
FSD
8h 02m
1 stop
American Airlines Logo
7:30 am - 11:43 am
FSD
-
ONT
6h 13m
1 stop
$363American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Sioux Falls flights

Get data-powered insights and trends into flights from Ontario to Sioux Falls to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Ontario to Sioux Falls?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Sioux Falls departing in July.

What is the cheapest month to fly from Ontario to Sioux Falls?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Sioux Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Sioux Falls is October, where tickets cost $230 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $491 and $486 respectively.

Good to know

Low seasonJanuary
Cheapest flight$126
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly with an average 11% increase in price.
Flight from Ontario to Sioux Falls

When to book flights from Ontario to Sioux Falls

Are your dates flexible? Find out the best times to travel from Ontario to Sioux Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Sioux Falls

  • What is the cheapest flight from Ontario to Sioux Falls?

    In the last 5 days, the lowest price for a flight from Ontario to Sioux Falls was $126 for a one-way ticket and $240 for a round-trip.

  • Do I need a passport to fly between Ontario and Sioux Falls?

    No, a passport isn't needed to fly from Ontario to Sioux Falls. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Ontario to Sioux Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Sioux Falls?

    Star Alliance, and oneworld are the airline alliances operating flights between Ontario and Sioux Falls, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Sioux Falls, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Sioux Falls are United Airlines and American Airlines. With an average price for the route of $447 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $413 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Ontario to Sioux Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Sioux Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Sioux Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sioux Falls from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Sioux Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sioux Falls with an airline and back to Ontario with another airline. Booking your flights between Ontario and FSD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Sioux Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sioux Falls from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Sioux Falls

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Sioux Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Sioux Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9921 reviews
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
7.3Comfort
Airline reviews

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

8.0 ExcellentNico, Jun 2026
LAX - HNL
Read more United Airlines reviews

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

Service was professional and quick. Premium economy seat was comfortable given the class

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

The flight attendants were very friendly, efficient, and helpful. The plane was ahead of schedule, and it all went very smoothly. Thank you.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

The flight was on time and arrived early. The crew were friendly and helpful.

I have a gluten allergy so did have any food

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Wonderful crew and early arrival to our destination. It was so nice to have free wifi access and movies too. Thank you!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

A lady asked to stop the flight after the tunnel pulled away and we began to depart a flight that was already hours late. The attendance respectfully stopped the the plane and had the tunnel return. After the tunnel returned the passenger claimed to have changed her mind . The tunnel was then put in reverse and the passenger remained on the plane .. They should have sent the sick passenger off the plane like initially replaced. They existed a couple off the plane prior to that situation.. So.. all and all.. it was a long and flight.. .

We understand and comply with Frontier’s bag sizes. We’ve had some problems in past while having to await other passengers who do not understand the baggage restrictions or have not prepaid and that is usually our biggest concern (others delaying us) with flying Frontier. Flying OUT of ONT, however, has always been a great experience. I’ve also noted even on delayed Frontier flights very knowledgeable pilots who manage expectations well.

Long lines, rude staff, everything that's offered you have to pay for.

The last time I flew Frontier was in the 1960s when it was a “real” airline. We flew this time because of the price & schedule. As the saying goes, you get what you pay for.

Gate agent for Frontier in Sioux Falls was horrible. Some people shouldn't have jobs where they need to work with people. This person tried to control everything and even argued with a Sheriff's Deputy. He seemed to write the law and think he was immune to everything and could do whatever he wanted. What a miserable experience for a lot of people. He even delayed the flight just for on his own actions. The pilots made up the time lost, but why does this person have this job. Apparently nobody cares at Frontier. We do, My wife said she would never fly on Frontier again.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

This isna terribly run airlines. If you're one minute late, they will deny your ticket. Don't waste your time or money

Everything you need to know for your flight from Ontario to Sioux Falls

Information on your arrival and departure airports