Cheap Flights from Ontario International Airport to St. Louis (STL) Find and Compare the Best Airline Deals | Skyticket

Departure Date

2025/3
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2025/3
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Total Fares（Round-Trip/Economy）: USD /Per Person

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Ontario－St. Louis Lambert Airport
March Lowest Airfares -----
Ontario－St. Louis Lambert Airport
April Lowest Airfares -----

Ontario－St. Louis Lambert Airport
May Lowest Airfares -----
Ontario－St. Louis Lambert Airport
June Lowest Airfares -----
Ontario－St. Louis Lambert Airport
July Lowest Airfares -----

Ontario－St. Louis
Estimated Flight Time
4 Hours 25 Minutes
Ontario－St. Louis
Number of Operating Airlines
4

Operating Airlines for Ontario－St. Louis Lambert Airport Route
American Airlines

Alaska Airlines

Delta Air Lines

United Airlines

Other Destinations from:Ontario

Ontario－Syracuse(Hancock)
USD737〜
Ontario－Tampa(TPA)
USD484〜
Ontario－Tulsa(TUL)
USD444〜
Ontario－Tucson(TUS)
USD332〜
* Fares vary in accordance to seat availability
Other Departures to: St. Louis
* Fares vary in accordance to seat availability