Cheap flight from St. Louis to Ontario from AED 208
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Flights from St. Louis to Ontario
Cheap flight deals from St. Louis to Ontario
We've found these cheap flights for you. You can book one-way or round-trip flight tickets.
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Sat, May 3 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Wed, May 7 | Frontier AirlinesAED 432 AED 85449% OFF49% OFFAED 854 AED 432 -
STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Sun, May 4 | Frontier Airlines
SIN 00:5912h 8m1 stopsSTL 15:07Ontario - St. Louis | Thu, May 8 | Frontier AirlinesAED 532 AED 85438% OFF38% OFFAED 854 AED 532
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STL 21:5517h 21m1 stopsONT 13:16St. Louis - Ontario | Thu, May 8 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Wed, May 14 | Frontier AirlinesAED 636 AED 85426% OFF26% OFFAED 854 AED 636
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STL 21:5513h 59m1 stopsONT 09:54St. Louis - Ontario | Mon, May 12 | Frontier Airlines
SIN 16:5929h 7m1 stopsSTL 00:06Ontario - St. Louis | Tue, May 13 | Frontier AirlinesAED 66023% OFFAED 854 AED 660
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Sat, May 10 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Wed, May 14 | Frontier AirlinesAED 66922% OFFAED 854 AED 669
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STL 20:1517h1 stopsONT 11:15St. Louis - Ontario | Wed, May 14 | Frontier Airlines
SIN 00:597h1 stopsSTL 09:59Ontario - St. Louis | Sat, May 17 | Frontier AirlinesAED 68320% OFFAED 854 AED 683
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Fri, May 9 | Frontier Airlines
SIN 00:596h 10m1 stopsSTL 09:09Ontario - St. Louis | Mon, May 12 | Frontier AirlinesAED 68520% OFFAED 854 AED 685
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STL 21:5517h 21m1 stopsONT 13:16St. Louis - Ontario | Sun, May 11 | Frontier Airlines
SIN 06:1524h 54m1 stopsSTL 09:09Ontario - St. Louis | Tue, May 13 | Frontier AirlinesAED 69718% OFFAED 854 AED 697
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STL 20:155h 44m1 stopsONT 23:59St. Louis - Ontario | Sat, May 17 | Frontier Airlines
SIN 13:5918h1 stopsSTL 09:59Ontario - St. Louis | Tue, May 20 | Frontier AirlinesAED 69918% OFFAED 854 AED 699
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Fri, May 16 | Frontier Airlines
SIN 16:5929h 7m1 stopsSTL 00:06Ontario - St. Louis | Sun, May 18 | Frontier AirlinesAED 70917% OFFAED 854 AED 709
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STL 13:0017h 25m1 stopsONT Invalid DateSt. Louis - Ontario | Mon, May 5 | Normal Airline
ONT 15:006hNonstopSTL 16:00Ontario - St. Louis | Wed, May 7 | Normal AirlineFind More FlightsFind More Flights
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Sat, May 3 | Frontier AirlinesAED 208 AED 52761% OFF61% OFFAED 527 AED 208
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STL 16:079h 52m1 stopsONT 23:59St. Louis - Ontario | Thu, May 15 | Frontier AirlinesAED 303 AED 52742% OFF42% OFFAED 527 AED 303
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STL 18:537h 6m1 stopsONT 23:59St. Louis - Ontario | Fri, May 9 | Frontier AirlinesAED 340 AED 52735% OFF35% OFFAED 527 AED 340
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STL 20:155h 44m1 stopsONT 23:59St. Louis - Ontario | Sat, May 10 | Frontier AirlinesAED 34035% OFFAED 527 AED 340
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Fri, May 16 | Frontier AirlinesAED 35832% OFFAED 527 AED 358
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STL 21:5513h 59m1 stopsONT 09:54St. Louis - Ontario | Mon, May 5 | Frontier AirlinesAED 35832% OFFAED 527 AED 358
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Sun, May 4 | Frontier AirlinesAED 35832% OFFAED 527 AED 358
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STL 19:5515h 20m1 stopsONT 09:15St. Louis - Ontario | Sat, May 24 | Frontier AirlinesAED 36032% OFFAED 527 AED 360
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STL 20:1517h1 stopsONT 11:15St. Louis - Ontario | Wed, May 14 | Frontier AirlinesAED 36132% OFFAED 527 AED 361
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STL 21:5511h 29m1 stopsONT 07:24St. Louis - Ontario | Sun, May 11 | Frontier AirlinesAED 43717% OFFAED 527 AED 437
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STL 13:0017h 25m1 stopsONT Invalid DateSt. Louis - Ontario | Mon, May 5 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Frequently Asked Questions
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When are flight tickets from St. Louis (STL) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from St. Louis to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from St. Louis (STL) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around AED 1,295.
How to find a cheap flight from St. Louis to Ontario
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Ontario. Book your flights at the right time and save more.
Being flexible with your dates to get the cheapest St. Louis to Ontario ticket.
Tap "Date" on flight search bar to scan through the calender for St. Louis to Ontario airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Sat, May 3 at AED 208 for one-way flights.
Compare cheap St. Louis to Ontario flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from St. Louis to Ontario. The cheapest airline operating is Frontier Airlines.
Set up a Price Alert
By setting up a Price Alert for your St. Louis to Ontario route, you can easily track the price of your airline tickets from without manually checking every day.
Don't miss cheap St. Louis to Ontario flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from St. Louis to Ontario to get exclusive deals for you.
Flight Info | St. Louis to Ontario
| Cheapest one-way flight price | AED 207 |
|---|---|
| Cheapest return ticket price | AED 1,115 |
| Off-season for travel | October |
| Peak season for travel | November |
| Flight distance | 10,023.47 km |
| Popular airline | Delta Air Lines |
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