
Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Lambert-St. Louis International Airport (STL)
- Frontier Airlines
Frontier Airlines
- Delta
Delta
- American Airlines
American Airlines
- Southwest Airlines
Southwest Airlines
- United
United
- Alaska Airlines
Alaska Airlines
- Hawaiian Airlines
Hawaiian Airlines
- Plan, book, fly with confidence
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Find the cheapest month to fly from Ontario (ONT) to St. Louis (STL)
October is typically the cheapest month to fly
Graph displaying average flight prices per month
Origin airport | Los Angeles - Ontario Intl. |
Destination airport | Lambert-St. Louis Intl. |
Distance | 2467 km |
Average flight time | 4 hours 50 mins |
Compare flights from Ontario to St. Louis easily and book with confidence
For travelling on business or for pleasure, Expedia makes it easy to book your flights from Ontario to St. Louis. Operating between them flights per day, airlines cover the route. And fly direct, getting you to Lambert-St. Louis Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Los Angeles - Ontario Intl. to Lambert-St. Louis Intl..
To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.
Grab a great deal on your flight from Los Angeles - Ontario Intl. (ONT) to Lambert-St. Louis Intl. (STL)
The easiest way to view the best deals on flights from Ontario to St. Louis today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Los Angeles - Ontario Intl. to Lambert-St. Louis Intl. start at just and range up to .
To find an even better deal, try
- being flexible on your dates – midweek flights can be cheaper
- looking for other airports near Ontario and St. Louis
- booking your flight during , the cheapest month on this route
- varying your flight times – early morning and late at night are sometimes cheaper
Why you should book your Ontario to St. Louis flight with Expedia!
We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Los Angeles - Ontario Intl. to Lambert-St. Louis Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.
Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.
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Top Routes to St. Louis
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