Popular in | July |
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Cheapest in | April |
Average price | $694 |
Currently, October is the cheapest month in which you can book a flight from Ontario to Sioux City (average of $318). Flying from Ontario to Sioux City in March is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.