Allegiant AirDepart22:31
Fri, Nov 13FSD → ONT
4h 03m · 1 stop
$238one way, per person
View deal
- Cheapest fare
- $238
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 4h 03m
Allegiant Air · Fri, Nov 13
from $238
Usually 1+ stop
2,090 km
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Cheapest month to fly from Sioux Falls to Ontario
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
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About flights from Sioux Falls to Ontario
Sioux Falls (FSD) and Ontario (ONT) are about 2,090 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 4h 03m. Over the next few months, one-way fares start from $238, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Sioux Falls to Ontario?
The cheapest one-way fare we've seen recently is $238 with Allegiant Air, departing Friday, November 13, 2026.
What is the cheapest month to fly from Sioux Falls to Ontario?
November 2026 currently has the lowest fares, from $238 one way.
Are there direct flights from Sioux Falls to Ontario?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Sioux Falls to Ontario?
The quickest journey we've seen takes about 4h 03m. Sioux Falls and Ontario are around 2,090 km apart.
Which airlines fly from Sioux Falls to Ontario?
Recent fares on this route were with Allegiant Air.
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