Flights from Ontario to Sioux City Starting at £110

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.

Find the best time to fly from Ontario to Sioux City

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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 cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

When are 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 are flights from Ontario (ONT) to Sioux City (SUX) cost?

According to Trip.com's data, the lowest price is around £315.
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 (SUX)?

There are 1 airport(s) in Sioux City (SUX): 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.

Be flexible with your travel dates to get the cheapest flight from Ontario to Sioux City.

Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Ontario to Sioux City over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Tue, Mar 25, with one-way flights priced at just £110.

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

With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Ontario to Sioux City. The cheapest airline for this route is Frontier Airlines.

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Don't miss out on cheap flight deals and promo codes from Ontario to Sioux City.

You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.

Book early or wait until the last minute.

It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.

Search for flights on the go.

For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Ontario to Sioux City and snag some exclusive deals just for you.

Flight Information from Ontario to Sioux City

Cheapest one-way flight price	£109
Off-season travel month	September
Peak season for travel	November
Flight distance	10,531.27km
Popular airline	United Airlines