Cheap Flights from Sioux Falls to Ontario International

Compare Sioux Falls to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Sioux Falls to Ontario International

Looking for a cheap last-minute deal or the best return flight from Sioux Falls Airport to Ontario International Airport? If you want to travel next month, return fares start from R 4,101. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Sioux Falls to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Sioux Falls to Ontario International flights are currently cheapest in July.

Sioux Falls to Ontario: Flight information

The things to know before you go.
Cheapest flight foundR 2,142
Cheapest month to flyJuly

Finding cheap flights from Sioux Falls to Ontario International: Frequently asked questions

The best price we found for a return flight from Sioux Falls to Ontario International is R 4,092. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Sioux Falls to Ontario International. But we found flights with one or more stops from R 4,092.
As of June 2026, there are no flights flying from Sioux Falls to Ontario International.
The cheapest month to fly from Sioux Falls to Ontario International is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Sioux Falls Airport to Ontario International Airport on Friday, 24 July 2026.
No airlines currently offer direct flights between Sioux Falls Airport and Ontario International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Frontier Airlines offers the cheapest flight tickets to Ontario International.

Travelling from Sioux Falls Airport (FSD) to Ontario International Airport (ONT): what you need to know

  • The timezone in Ontario is UTC-8, which is two hours behind Sioux Falls.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Make sure you're at the airport on time to board your FSD to ONT flight.

  • During popular months such as May, you'll want to get to the airport even earlier. Plan to arrive two hours before domestic departures and four hours ahead for international flights whenever you're travelling during peak periods in general.

  • If you'd like to include a stop along the way, simply deselect 'Direct flights only' when searching for your ticket from Sioux Falls Airport to Ontario International Airport. These are the most popular stopovers between FSD and ONT:

    • Denver International Airport

    • Phoenix Sky Harbour Airport

    • Harry Reid International Airport

Handy information about Sioux Falls Airport (FSD)

  • FSD is located at 2801 Jaycee Lane.

  • When it comes to the on-time performance of Sioux Falls Airport, 70% of flights meet their scheduled arrival time.

  • Sioux Falls Airport is about 10 kilometres from central Sioux Falls. If you're catching a taxi, ride-sharing or driving from the centre, it'll take you 15 minutes or so to arrive, depending on the traffic.

  • The trip when using public transport will take about 35 minutes.

  • Searching for a handy hotel near FSD? If you've booked an early flight from Sioux Falls Airport to Ontario International Airport, these accommodation options will have you moments from your departure lounge:

Arriving at Ontario International Airport (ONT)

When to fly to Ontario International Airport (ONT)

  • July is the most popular month for flights from Sioux Falls Airport to Ontario International Airport. To skip the crowds, head to Ontario in March.

  • The warmest month in Ontario is August, with the temperature ranging between 16ºC (61ºF) and 36ºC (97ºF). Book your flights from Sioux Falls Airport to Ontario International Airport in this month if this is the type of weather you like.

  • February has average temperatures of between 4ºC (39ºF) and 24ºC (75ºF). Look for cheap tickets from FSD to ONT sometime around then if you like cooler conditions.

Explore more of the United States

  • Ontario is easy to fall in love with, but there are so many other parts of the United States waiting to be discovered. Around 56 kilometres west of Ontario, a trip to Los Angeles will keep you busy. Check out popular attractions like Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

  • If there's time to check out another corner of the United States, head for San Diego, roughly 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are key reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.