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Amazing STL to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $123 round trip and $43 one way. Prices and availability subject to change. Additional terms may apply.

FAQs about flights from Lambert-St. Louis Intl. Airport (STL) to Los Angeles - Ontario Intl. Airport (ONT)

Are there direct flights from St. Louis Lambert International Airport to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.)?

Prepare for a stopover when traveling from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.). There are no direct flights on this route, however SriLankan Airlines, Japan Transocean Air and Southwest Airlines will get you to your destination in a timely manner.

How long is the flight from St. Louis Lambert International Airport to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.)?

The flight time between St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) and Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) generally lasts 4 hours and 42 minutes. Make your trip comfortable by saving a movie or a few TV shows on your phone or laptop and enjoying them with your seat fully reclined.

What is the flight distance from St. Louis Lambert International Airport to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.)?

Between St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) and Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.), the flight distance is around 1,616 miles (2,600 kilometers). So, order a drink and get comfortable. You've got some important choices to make — start on a new series, finish your novel or get some beauty sleep?

What airlines fly direct from St. Louis Lambert International Airport to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.)?

You'll have to make at least one stopover if you're on your way from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.). As it stands, no airlines offer direct flights between these airports.

Flying Tips & TricksHow do I find my flight number?
  • When you've finalized your booking, take a look in your inbox for your itinerary. Your flight number is in this document. You won't have too many difficulties identifying it — just look for a code containing numbers and letters. The first couple of letters and single digit are called an IATA airline code and indicate the airline you're traveling with. Following this are one, two, three or four numbers which make up your flight number.
How early can you check bags for a flight?
  • Check-in and luggage drop times can vary between airlines, but there are some general rules of thumb. Jetting off on a domestic flight? You can usually check your bags two hours before takeoff. For international services, three hours is standard.

Lambert-St. Louis Intl. to Los Angeles - Ontario Intl. Flight FAQ

Traveling FromLambert-St. Louis Intl.
Traveling ToLos Angeles - Ontario Intl.
Shortest Flight Time5 hours 20 mins
Earliest Departure Time6:00AM CDT
Latest Departure Time6:00AM CDT
Lowest Flight Price$123

St. Louis to Ontario Carriers and Route Information

Flight path for flights from Lambert-St. Louis International Airport to LA/Ontario International Airport


Distance:
1,592.00 miles


Airlines & Aircraft Used on STL to ONT Flight Routes


Airline Carrier
Aircraft
American Airlines
Boeing 737-400 pax
American Airlines
Boeing 737-800 pax
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.