₹19,240 Cheap Flights from Ontario (ONT) to St. Louis (STL)

View ₹19,240 flight on Sun, 9 Nov 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Lambert-St. Louis International Airport (STL)

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

Prices were available within the past 7 days and start at ₹19,240 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from Ontario (ONT) to St. Louis (STL)

October is typically the cheapest month to fly

From ₹10,399 - ₹35,525 per traveller.
Flight from Ontario to St. Louis route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
2467 km
Average flight time
5 hours 15 mins

Los Angeles to St. Louis Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Los Angeles to St. Louis will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring St. Louis.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with ONT to STL flights that won’t make your bank account wince. Ready to temporarily leave behind Los Angeles for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to STL with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Frequently asked questions

How much is a flight from Los Angeles - Ontario Intl. Airport (ONT) to STL?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from ONT to STL was . Fares this good don't wait forever, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Los Angeles - Ontario Intl. Airport (ONT) to STL?
This can differ between air carriers, as each has its own terms and conditions. Head to the Customer Service Portal, where you'll find easy instructions on how to cancel online.
How do I find cheap flights from Ontario Airport to STL that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Los Angeles - Ontario Intl. Airport (ONT) to STL flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Los Angeles - Ontario Intl. Airport (ONT) to STL?
The flying distance from Ontario Airport to St. Louis Lambert International Airport is 2,500 kilometres. Sneak in a nap or finish off your latest read and the trip will zip by.
Which airlines fly direct from Ontario Airport to St. Louis Lambert International Airport?
If you want to fly straight from Los Angeles - Ontario Intl. Airport (ONT) to Lambert-St. Louis Intl. Airport (STL), you'll have to book a flight with one or more stops. Unfortunately, there are no airlines that fly directly between these airports.
Are Los Angeles - Ontario Intl. Airport (ONT) to Lambert-St. Louis Intl. Airport (STL) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Ontario Airport to St. Louis Lambert International Airport last minute could save you some serious cash. However, you might miss out on a flight altogether! If you'd prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains as far ahead as 12 months in advance. If your preferred carrier hasn't released tickets yet, check back often as deals are updated all the time on Expedia.

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Ontario Airports

Los Angeles

Los Angeles Intl. to St. Louis
₹26,928.00
*Available to Expedia members.