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Latest Flight Deals from Ontario to St. Louis
Book one-way or return flights from Ontario to St. Louis from as little as NZD 68. 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 AirlinesNZD 68NZD 11641% OFF41% OFFNZD 116NZD 68
- ONT00:596h 48m1 stopSTL09:47Wed, May 1|Ontario - St. Louis|Frontier AirlinesNZD 68NZD 11641% OFF41% OFFNZD 116NZD 68
- ONT12:397h 20m1 stopSTL21:59Tue, May 14|Ontario - St. Louis|Frontier AirlinesNZD 71NZD 11638% OFF38% OFFNZD 116NZD 71
- ONT12:397h 20m1 stopSTL21:59Tue, May 7|Ontario - St. Louis|Frontier AirlinesNZD 76NZD 76
- ONT00:596h 48m1 stopSTL09:47Wed, May 8|Ontario - St. Louis|Frontier AirlinesNZD 78NZD 78
- ONT00:596h 48m1 stopSTL09:47Mon, May 13|Ontario - St. Louis|Frontier AirlinesNZD 79NZD 79
- ONT00:596h 37m1 stopSTL09:36Wed, May 22|Ontario - St. Louis|Frontier AirlinesNZD 80NZD 80
- ONT12:347h 35m1 stopSTL22:09Thu, May 2|Ontario - St. Louis|Frontier AirlinesNZD 80NZD 80
- ONT00:556h 52m1 stopSTL09:47Sat, May 4|Ontario - St. Louis|Frontier AirlinesNZD 80NZD 80
- ONT00:596h 26m1 stopSTL09:25Sat, May 18|Ontario - St. Louis|Frontier AirlinesNZD 80NZD 80
- 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.
Searching for the best last minute flight from Ontario to St. Louis? Find one-way or return flights that are affordable and fit your itinerary.
Trip.com monitors the ticket fares of flights from Ontario to St. Louis. Stay updated on price trends and snag the best deals for your upcoming trip.
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Ontario to St. Louis
View airlines operating flights from Ontario to St. Louis. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Frontier Airlines
From NZD 68
United Airlines
From NZD 226
Delta Air Lines
From NZD 278
Alaska Airlines
From NZD 285
Southwest Airlines
From NZD 342
American Airlines
From NZD 417
ANA airlines
Find more flights and airlines
Alternative Routes from Ontario to St. Louis
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 AirlinesNZD 68
- ONT00:596h 48m1 transferSTL09:47Ontario International Airport - St. Louis Lambert International AirportWed, May 1Frontier AirlinesNZD 68Find More Flights
How do I find the cheapest flights?
How to find a cheap flight from Ontario to St. Louis
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 Ontario to St. Louis. Book your flights at the right time and save more.
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
Compare Flight Prices
Compare prices on travel agency and airline websites.
Look Out for Deals
Check airline and travel agency websites for latest flight deals
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
Use the Trip.com App
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Flight Information from Ontario to St. Louis
Cheapest nonstop flight price | NZD 68 |
---|---|
Cheapest round-trip ticket price | NZD 126 |
Off-season for travel | January |
Peak season for travel | December |
Flight distance | 10,023.47km |
Popular airline | Frontier Airlines |
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