ONT to STL (Ontario to St. Louis) Flights

Last Minute Flights from ONT to STL

Best airfare and ticket deals for ONT to STL flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
ONTSt. LouisApril 21 to April 25$188
*Prices include taxes and fees

Cheapest ONT to STL Flights

Best airfare and ticket deals for ONT to STL flights are based on recent deals found by Expedia.com customers within the past 7 days.

OriginDestinationTravel DatesFlights From*
ONTSt. LouisMay 9 to May 18$86
ONTSt. LouisMay 29 to May 31$317
ONTSt. LouisMay 6 to May 15$358
ONTSt. LouisMay 26 to May 29$395
*Prices include taxes and fees
ONT to STL Flight Details
Origin airport
Los Angeles - Ontario Intl.
Origin airport IATA code
ONT
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Distance
1541 mi

Frequently asked questions

Which airlines with flights from ONT to STL allow free cancellation due to COVID-19?
Airlines offering flexible fares from Los Angeles - Ontario International Airport to STL can be easily found with the help of our convenient filter tool. Exactly what kinds of COVID-19 related changes are covered is detailed in each fare’s rules and regulations. Simply type in your trip details, then check the “No change fee” box. You’ll find it on the left-hand side of the screen underneath the “Flexible change policies” subheading.
What airlines fly direct from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.)?
At the moment there are no air carriers that fly nonstop from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to STL. Break up the journey with one or two stops to reach St. Louis.
How many flights are there from ONT to STL?
There are 45 flights every day from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.), so you have no shortage of ways to get to St. Louis. Just decide on a date that suits your schedule and lock in your fare.
How long does it take to fly from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.)?
This flight from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) will take roughly 5 hours and 3 minutes. Use the time to start the novel that’s been gathering dust on your bedside table for months or catch up on your beauty sleep.
What is the flight distance from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to St. Louis, MO Airport (STL-Lambert-St. Louis Intl.)?
About 1550 miles (2500 km). If you fly regularly and have collected an useful number of air miles, this medium-haul journey may be the right time to cash them in for an upgrade.
How many morning flights are there from ONT to STL?
With 170 morning flights per week from ONT to STL to take your pick of, you’ll be bouncing out of bed and taking to the skies before you know it.
  • Southwest Airlines (WN) has around 80 weekly flights that depart before noon. The earliest one you can take is 5:50AM.
  • Another option is American Airlines. This airline has 43 early flights a week. 12:45AM is the earliest.
  • You’ll have 19 morning flights to select from if you book a seat with Delta (DL). 6:15AM is the earliest available.
How many afternoon flights are there from ONT to STL?
Take off aboard one of the 149 afternoon and evening flights from ONT to STL each week.
  • Consider booking with Southwest Airlines (WN). This carrier operates 59 flights every week that depart after noon. The earliest service is 1:20PM.
  • You can also choose from the 33 afternoon and evening flights with American Airlines (AA) each week. 12:42PM is the first scheduled departure.
  • One more attractive option is Delta (DL). It provides 25 afternoon and evening flights a week from 12:25PM onward.
What is the earliest departure time out of Los Angeles to St. Louis?
The earliest flight leaves ONT at 12:39AM and arrives at 12:24PM at STL. Remember to give yourself lots of time in the morning to make it to your departure gate.
What is the latest departure time out of Los Angeles to St. Louis?
Lock in a seat on the 11:55PM flight out of ONT, touching down at STL at 9:03AM, and allow yourself time to attend to those last-minute vacation preparations. This is the latest flight you can catch on this route.
What is the average price from Los Angeles to St. Louis?
Round-trip tickets from ONT to STL begin from around $86. Awesome deals wait for no one, so be ready to book when the price is right. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Ontario to St. Louis Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Ontario to St. Louis to attend your cousin’s wedding, to pitch a business idea to your boss, or perhaps simply to treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find the cheapest flights from ONT to STL, we’ve got you covered here at Flights.com.

We present you with some of the hottest deals on airfare so stop that Google flights search. We want you to spend less on your flight from Ontario to St. Louis, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.