Cheap Flights from Ontario to Sioux City starting at S$ 190

We've found these cheap flights for you. You can book one-way or return flight tickets.

Round-trip
One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Cheapest time to fly from Ontario to Sioux City

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

16 23
23 30
Apr

30 6
6 13
13 20
20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8

Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

When to buy flight tickets from Ontario (ONT) to Sioux City (SUX) the cheapest?

Airlines adjust prices for flights from Ontario to Sioux City based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much is a flight from Ontario (ONT) to Sioux City (SUX) cost?

According to Trip.com's data, the lowest price is around S$ 545.
What is the transportation method from the main airport to downtown in Sioux City?
- The distance from Sioux Gateway Airport to downtown is about 11km, by taxi about 30 minutes.
How many airports in Sioux City?

There are 1 airports near Sioux City: Sioux Gateway Airport.

How to find a cheap flight from Ontario to Sioux City

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to Sioux City. Book your flights at the right time and save more.

Choose your dates flexibly and get the best deals on flights from Ontario to Sioux City.

Tap 'Date' on the flight search bar to browse the calendar for Ontario to Sioux City airfare over the next 6 months in 2025. If you're looking to fly within the next 3 months, the cheapest date seems to be Tue, Mar 25, with one-way flights starting at S$ 190.

Compare cheap flight deals from hundreds of airlines for Ontario to Sioux City flights.

Our extensive search lets you compare prices from over 500 airlines to find the cheapest flights from Ontario to Sioux City. The cheapest flight at the moment is with Frontier Airlines.

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Book early or wait for last-minute deals.

It's always better to book early. Flight tickets are often at their lowest when first released, usually a year ahead of departure. Keep an eye out as soon as your desired flights open for booking. If you miss the early deals, you may still find lower prices closer to your travel date.

Search for flights on the go.

For the best flight booking experience on the go, download Trip.com and search for cheap flights from Ontario to Sioux City to get your exclusive deals.

Find cheapest flight ticket from Ontario to Sioux City

Cheapest one-way flight price	S$ 189
Off-season for travel	September
Peak season for travel	November
Flight distance	10,531.27km
Popular airline	United Airlines