Cheap Flights from Ontario to St. Louis starting at S$ 55
Book one-way or return flights from Ontario to St. Louis from as little as S$ 55. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- ONT00:5912h 51m1 stopSTL15:50Tue, Apr 30|Ontario - St. Louis|Frontier AirlinesS$ 55S$ 9441% OFF41% OFFS$ 94S$ 55
- ONT00:596h 48m1 stopSTL09:47Wed, May 1|Ontario - St. Louis|Frontier AirlinesS$ 55S$ 9441% OFF41% OFFS$ 94S$ 55
- ONT12:397h 20m1 stopSTL21:59Tue, May 14|Ontario - St. Louis|Frontier AirlinesS$ 58S$ 9438% OFF38% OFFS$ 94S$ 58
- ONT12:397h 20m1 stopSTL21:59Tue, May 7|Ontario - St. Louis|Frontier AirlinesS$ 61S$ 61
- ONT00:596h 48m1 stopSTL09:47Wed, May 8|Ontario - St. Louis|Frontier AirlinesS$ 63S$ 63
- ONT00:596h 48m1 stopSTL09:47Mon, May 13|Ontario - St. Louis|Frontier AirlinesS$ 64S$ 64
- ONT00:596h 37m1 stopSTL09:36Wed, May 22|Ontario - St. Louis|Frontier AirlinesS$ 64S$ 64
- ONT12:347h 35m1 stopSTL22:09Thu, May 2|Ontario - St. Louis|Frontier AirlinesS$ 65S$ 65
- ONT00:556h 52m1 stopSTL09:47Sat, May 4|Ontario - St. Louis|Frontier AirlinesS$ 65S$ 65
- ONT00:596h 26m1 stopSTL09:25Sat, May 18|Ontario - St. Louis|Frontier AirlinesS$ 65S$ 65
- ONT13:003h 5mDirectSTL14:00Sun, May 5|Ontario - St. Louis|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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Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Ontario to St. Louis.
- CheapestONT00:596h 48m1 transferSTL09:47Ontario International Airport - St. Louis Lambert International AirportWed, May 1Frontier AirlinesS$ 55
- ONT00:596h 48m1 transferSTL09:47Ontario International Airport - St. Louis Lambert International AirportWed, May 1Frontier AirlinesS$ 55Find More Flights
Frequently Asked Questions
How to find a cheap flight from Ontario to St. Louis
Cheapest direct flight price | S$ 55 |
---|---|
Cheapest return ticket price | S$ 102 |
Cheapest month | January |
Peak season for travel | December |
Flight distance | 10,023.47km |
Popular airline | Frontier Airlines |
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