Cheap Flights from St. Louis to Ontario starting at S$ 38
Book one-way or return flights from St. Louis to Ontario from as little as S$ 38. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- STL20:045h 55mDirectONT23:59Sat, May 18|St. Louis - Ontario|Frontier AirlinesS$ 38S$ 8455% OFF55% OFFS$ 84S$ 38
- STL20:045h 55mDirectONT23:59Wed, May 1|St. Louis - Ontario|Frontier AirlinesS$ 43S$ 8449% OFF49% OFFS$ 84S$ 43
- STL20:045h 55mDirectONT23:59Wed, May 8|St. Louis - Ontario|Frontier AirlinesS$ 43S$ 8449% OFF49% OFFS$ 84S$ 43
- STL20:045h 55mDirectONT23:59Wed, May 15|St. Louis - Ontario|Frontier AirlinesS$ 44S$ 44
- STL16:509h 9m1 stopONT23:59Tue, May 7|St. Louis - Ontario|Frontier AirlinesS$ 52S$ 52
- STL12:396h 20m1 stopONT16:59Sat, May 4|St. Louis - Ontario|Frontier AirlinesS$ 63S$ 63
- STL22:5925h 10m1 stopONT22:09Tue, May 14|St. Louis - Ontario|Frontier AirlinesS$ 65S$ 65
- STL23:0626h 53m1 stopONT23:59Thu, May 16|St. Louis - Ontario|Frontier AirlinesS$ 66S$ 66
- STL20:045h 55mDirectONT23:59Mon, May 20|St. Louis - Ontario|Frontier AirlinesS$ 68S$ 68
- STL19:5113h 12m1 stopONT07:03Mon, May 6|St. Louis - Ontario|Frontier AirlinesS$ 69S$ 69
- STL13:003h 5mDirectONT14:00Wed, May 8|St. Louis - Ontario|Frontier AirlinesFind More FlightsFind More Flights
Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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- CheapestSTL20:045h 55mDirectONT23:59St. Louis Lambert International Airport - Ontario International AirportSat, May 18Frontier AirlinesS$ 38
- STL20:045h 55mDirectONT23:59St. Louis Lambert International Airport - Ontario International AirportSat, May 18Frontier AirlinesS$ 38Find More Flights
Frequently Asked Questions
How to find a cheap flight from St. Louis to Ontario
Cheapest direct flight price | S$ 37 |
---|---|
Cheapest return ticket price | S$ 108 |
Cheapest month | October |
Peak season for travel | November |
Flight distance | 10,023.47km |
Popular airline | Alaska Airlines |
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