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

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

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Frequently asked questions

Is it cheaper to buy a plane ticket from STL to ONT last minute?
Being a spontaneous soul is an awesome way to discover the world, but it isn't necessarily the ideal way to track down a bargain airfare. Consider booking your Lambert-St. Louis Intl. Airport (STL) to ONT trip well in advance rather than waiting till the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. Save all that spontaneity for when you get to ONT!
What airports do you fly into for Ontario from St. Louis?
Los Angeles - Ontario Intl. Airport (ONT), John Wayne Airport (SNA) and Long Beach Municipal Airport (LGB) are your choices when setting off from St. Louis to Ontario. Around 5 kilometers east of the center of Ontario, Los Angeles - Ontario Intl. Airport (ONT) is the city's main gateway. Take into account things such as flight arrival and departure times and the distance to your hotel before you select an airport. Ontario Mills Shopping Mall and Toyota Arena are a couple of amazing attractions to put on your to-do list when you arrive.
Can I change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Ontario Airport?
You can easily make changes to your Lambert Field to ONT trip through the Expedia Trips portal. But before amending dates or times, read through the fare conditions in your itinerary to see what the airline will allow you to do and if fees apply. Some airlines have a change fee per person, on top of any difference in ticket prices. But if you booked in the last 24 hours, you may be able to cancel for free and organize new flights. You can also swing by our Customer Service portal for further details and to chat with our Virtual Agent.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Los Angeles - Ontario Intl.
Distance
2467 km

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St. Louis to Ontario Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from St. Louis to Ontario offer the perfect respite. Not only does exploring Ontario provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from St. Louis to Ontario may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from to today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Ontario are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Ontario more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Ontario is now!

St. Louis to Ontario Flights

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