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Cheap flights from Ontario to South Dakota from $87

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to South Dakota departing on 1/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to South Dakota

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:00 am - 7:00 pmONT-FSD
11h 00m1 stop
Frontier Logo
8:26 pm - 11:56 pmFSD-ONT
5h 30m1 stop
$237Frontier
Find Deal
Thu, Jan 8 - Sun, Jan 11
Frontier Logo
6:45 am - 7:55 pmONT-FSD
11h 10m1 stop
Frontier Logo
7:45 pm - 11:56 pmFSD-ONT
6h 11m1 stop
$257Frontier
Find Deal
Fri, Jan 2 - Thu, Jan 8
United Airlines Logo
1:34 pm - 8:21 pmONT-FSD
4h 47m1 stop
United Airlines Logo
9:00 am - 12:32 pmFSD-ONT
5h 32m1 stop
$339United Airlines
Find Deal
Sat, Dec 13 - Wed, Dec 17
United Airlines Logo
1:24 pm - 6:47 pmONT-RAP
4h 23m1 stop
United Airlines Logo
2:40 pm - 8:58 pmRAP-ONT
7h 18m1 stop
$339United Airlines
Find Deal
Thu, Jan 8 - Sun, Jan 11
Delta Logo
12:12 pm - 11:14 pmONT-FSD
9h 02m1 stop
Delta Logo
5:14 am - 12:34 pmFSD-ONT
9h 20m2 stops
$344Delta
Find Deal
Sat, Dec 13 - Wed, Dec 17
United Airlines Logo
6:00 am - 3:22 pmONT-RAP
8h 22m2 stops
United Airlines Logo
2:40 pm - 8:58 pmRAP-ONT
7h 18m1 stop
$344United Airlines
Find Deal
Thu, Jan 8 - Mon, Jan 12
Delta Logo
5:49 pm - 10:20 amONT-FSD
14h 31m2 stops
Delta Logo
5:14 am - 12:34 pmFSD-ONT
9h 20m2 stops
$349Delta
Find Deal
Sat, Dec 13 - Wed, Dec 17
United Airlines Logo
1:53 pm - 10:29 pmONT-RAP
7h 36m2 stops
United Airlines Logo
2:40 pm - 10:53 pmRAP-ONT
9h 13m2 stops
$349United Airlines
Find Deal
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
1:24 pm - 8:24 pmONT-FSD
5h 00m1 stop
United Airlines Logo
1:40 pm - 10:53 pmFSD-ONT
11h 13m2 stops
$354United Airlines
Find Deal
Fri, Jan 16 - Tue, Jan 20
Delta Logo
1:10 pm - 11:04 pmONT-FSD
7h 54m2 stops
Delta Logo
5:00 am - 12:16 pmFSD-ONT
9h 16m2 stops
$369Delta
Find Deal
Thu, Jan 8 - Sun, Jan 11

Frontier flights from Ontario to South Dakota

Our best Frontier deals on Ontario to South Dakota flight tickets
Frontier
Jan 8
ONT6:00 amOntario
11h 00m
1 stop
FSD7:00 pmSioux Falls Joe Foss Field
Jan 11
FSD8:26 pmSioux Falls Joe Foss Field
5h 30m
1 stop
ONT11:56 pmOntario
$237
Find similar
Frontier
Jan 2
ONT6:45 amOntario
11h 10m
1 stop
FSD7:55 pmSioux Falls Joe Foss Field
Jan 8
FSD7:45 pmSioux Falls Joe Foss Field
6h 11m
1 stop
ONT11:56 pmOntario
$257
Find similar

United Airlines flights from Ontario to South Dakota

Our best United Airlines deals on Ontario to South Dakota flight tickets
United Airlines
Dec 13
ONT1:34 pmOntario
4h 47m
1 stop
FSD8:21 pmSioux Falls Joe Foss Field
Dec 17
FSD9:00 amSioux Falls Joe Foss Field
5h 32m
1 stop
ONT12:32 pmOntario
$339
Find similar
United Airlines
Jan 8
ONT6:00 amOntario
8h 22m
2 stops
RAP3:22 pmRapid City
Jan 12
RAP2:40 pmRapid City
7h 18m
1 stop
ONT8:58 pmOntario
$344
Find similar
United Airlines
Jan 8
ONT1:53 pmOntario
7h 36m
2 stops
RAP10:29 pmRapid City
Jan 12
RAP2:40 pmRapid City
9h 13m
2 stops
ONT10:53 pmOntario
$349
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to South Dakota 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, momondo users made 832,500 searches. Data last updated November 29, 2025.
Use the filters below to find and compare flights from Ontario to South Dakota that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Thu 1/8

6:00 am-7:00 pm

1 stop11h 00m

Sioux Falls Joe Foss Field

Sun 1/11

8:26 pm-11:56 pm

1 stop5h 30m

$237

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Fri 1/2

6:45 am-7:55 pm

1 stop11h 10m

Sioux Falls Joe Foss Field

Thu 1/8

7:45 pm-11:56 pm

1 stop6h 11m

$257

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Sat 12/13

1:34 pm-8:21 pm

1 stop4h 47m

Sioux Falls Joe Foss Field

Wed 12/17

9:00 am-12:32 pm

1 stop5h 32m

$339

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Thu 1/8

1:24 pm-6:47 pm

1 stop4h 23m

Rapid City

Sun 1/11

2:40 pm-8:58 pm

1 stop7h 18m

$339

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Sat 12/13

12:12 pm-11:14 pm

1 stop9h 02m

Sioux Falls Joe Foss Field

Wed 12/17

5:14 am-12:34 pm

2 stops9h 20m

$344

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Thu 1/8

6:00 am-3:22 pm

2 stops8h 22m

Rapid City

Mon 1/12

2:40 pm-8:58 pm

1 stop7h 18m

$344

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Sat 12/13

5:49 pm-10:20 am

2 stops14h 31m

Sioux Falls Joe Foss Field

Wed 12/17

5:14 am-12:34 pm

2 stops9h 20m

$349

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Thu 1/8

1:53 pm-10:29 pm

2 stops7h 36m

Rapid City

Mon 1/12

2:40 pm-10:53 pm

2 stops9h 13m

$349

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Fri 1/16

1:24 pm-8:24 pm

1 stop5h 00m

Sioux Falls Joe Foss Field

Tue 1/20

1:40 pm-10:53 pm

2 stops11h 13m

$354

OntarioSioux Falls

ONT - FSD

ONTFSD

Ontario

Thu 1/8

1:10 pm-11:04 pm

2 stops7h 54m

Sioux Falls Joe Foss Field

Sun 1/11

5:00 am-12:16 pm

2 stops9h 16m

$369

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to South Dakota from

How to get the cheapest flight ticket from Ontario to South Dakota

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to South Dakota?

The cheapest day to depart from Ontario to South Dakota is on a Monday. Travelers who choose to depart for South Dakota on a Monday will often find tickets for as low as $368. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $699. These prices are subject to change though, so be sure to set up a Price Alert for flights to South Dakota.

What is the cheapest time of day to depart on your flight to South Dakota?

The cheapest time of day to fly to South Dakota is in the afternoon when flights can be purchased for as low as $212. At noon is when there is more demand to fly to South Dakota, so prices are often more expensive at around $533 per ticket.

Cheap Ontario to South Dakota flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to South Dakota

Fastest flight time

4h 19m

Direct flights

None
The fastest flight from Ontario to South Dakota takes 4h 19m
There are no direct flights from Ontario to South Dakota. There are no popular flight routes from Ontario to South Dakota.
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  • When did momondo last update prices for flights from Ontario Airport to South Dakota?

    Prices for flights from Ontario Airport to South Dakota were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to South Dakota?

  • How old do you have to be to fly from Ontario Airport to South Dakota?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to South Dakota.

  • What documentation or ID do you need to fly to South Dakota?

    The travel and health documents required for your trip to South Dakota can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at South Dakota. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to South Dakota

Compare and see reviews for airlines that fly from Ontario to South Dakota with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $65Free CancellationRating
5.8
3,100 reviews
Search Frontier flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,056 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to South Dakota?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to South Dakota. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to South Dakota with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to South Dakota flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to South Dakota?

momondo provides multiple filters to help you find the best flight to South Dakota from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to South Dakota right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to South Dakota flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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