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Cheap Flights from St. Louis to Ontario $307.6

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Cheapest Flights from St. Louis to Ontario (STL to ONT)

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.
Ontario Airports

Orange County

$243.60

Long Beach

$323.60

Interesting Facts About Flights from St. Louis to Ontario (STL to ONT)

Question : How much should a trip from Saint Louis (STL) to Ontario (ONT) cost?
Answer : Flight prices change less than most routes in the United States for STL to ONT. They range from $299 to $548. However, the sooner you book, the better price you tend to get.

Question : What is the likelihood your flight will be delayed for this route?
Answer : The Saint Louis to Ontario route has been excellent at getting passengers to their destination on time, with a 100% on-time rate. If a flight is late, though, expect an average of 14 minutes added to your flight time.

Question : How many days should you spend in Ontario?
Answer : Passengers from STL to ONT stay seven days on average.

Question : Who's offering the cheapest round-trip flight to LA/Ontario International Airport (ONT) over the coming months?
Answer : Delta Air Lines is the leader in keeping prices down for their passengers over the next three months. Bookings are being made at just $299, which is quite a deal when compared to the high-end bookings of $548.

Question : What's the likelihood of you being delayed on this route?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. STL to ONT currently has 4 stars out of 5, earning it one of the best performances in the world.

Question : What is the cheapest day to fly in the next four weeks?
Answer : As of Mar 27th, the cheapest day to fly from Saint Louis to Ontario is Mar 30th. Tickets are currently being sold for $307, which is 22% below the average price for this route.

Question : Would you be willing to change your travel days if it saved you money?
Answer : The lowest-cost day to fly in April is Saturday. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.