Cheap flights from Ontario to St. Louis from C$ 212
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to St. Louis departing on 19/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Delta flights from Region of Ontario to St. Louis
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Air Canada flights from Region of Ontario to St. Louis
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How to get the cheapest flight ticket from Region of Ontario to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to St. Louis?
The month of June is, on average, the cheapest month to fly to St. Louis from Region of Ontario, with most prices found around C$ 537. If you don’t want to visit St. Louis in June, then you should wait until November to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 631.
What is the cheapest day to depart on your flight to St. Louis?
Our data shows that Thursday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 599. The most expensive day to fly to St. Louis is Monday, with ticket prices averaging around C$ 745.
What is the cheapest time of day to depart on your flight to St. Louis?
The cheapest time of day to fly to St. Louis is in the morning when flights can be purchased for as low as C$ 535. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 679 on average. Flights to St. Louis from Region of Ontario at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Ontario to Lambert-St Louis flight route?
Fly from Toronto Pearson Intl to Lambert-St Louis for the best Ontario - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Region of Ontario when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around C$ 659 when searching 19 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Region of Ontario for as low as C$ 464 on momondo.
What cabin class options are available on Ontario to Lambert-St Louis flights?
There are 1 cabin classes available to choose from on Ontario to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Lambert-St Louis?
American Airlines, Sun Country Air, and Air Canada are the most popular carriers operating from Ontario to Lambert-St Louis
Which airlines fly to St. Louis?
Air Canada, United Airlines and WestJet are the top three most popular airlines that fly to St. Louis from Region of Ontario according to our data. Air Canada is the first choice among our users, with 79% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Region of Ontario to St. Louis on average per day?
4 flights are operational daily from Region of Ontario to St. Louis as of June 2025. The most popular departure time for this route is 11:00a.m., with 50% of flights per day taking off at noon.
How many flights depart from Region of Ontario to St. Louis on average per week?
The number of flights available between Region of Ontario and St. Louis is 30 per week as of June 2025. The most frequent departure day is Wed, with 20% of weekly flights leaving on this day.
Cheap Region of Ontario to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to St. Louis
Best price found | C$ 212 |
|---|---|
Fastest flight time | 2h 03m |
Direct flights | Every day |
Airports in St. Louis | 1 airport |
When did momondo last update prices for flights from Ontario to Lambert-St Louis Airport?
Prices for flights from Ontario to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Lambert-St Louis Airport?
The number of operators available for flights from Ontario to Lambert-St Louis Airport is 3 as of June 2025.
How old do you have to be to fly from Ontario to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to St. Louis?
momondo data reveals that the most frequently booked plane model on the route from Region of Ontario to St. Louis is Canadair (Bombardier) Regional Jet 900, representing 55.32% of all bookings. The subsequent popular models are Airbus A220-300 at 38.96%, Airbus A319 at 1.56%, and Airbus A320-100/200 at 1.56%.
Best airlines flying from Region of Ontario to St. Louis
Compare and see reviews for airlines that fly from Region of Ontario to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 465 | Free Cancellation | Rating 7.1 9,572 reviews | |||
| PriceFrom C$ 472 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom C$ 549 | Free Cancellation | Rating 7.2 2,876 reviews |
Travelling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ontario to St. Louis?
It is quick and easy to find Ontario to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.
Can I find flights from Ontario to St. Louis with flexible booking policies on momondo?
Flights from Ontario to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ontario to St. Louis?
Once you have performed a search for Ontario to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Ontario to St. Louis right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to St. Louis from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.