Cheap flights from St. Louis to Ontario from C$ 171
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ontario departing on 9/5. 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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Air Canada flights from St. Louis to Region of Ontario
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American Airlines flights from St. Louis to Region of Ontario
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How to get the cheapest flight ticket from St. Louis to Region of Ontario
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 Region of Ontario?
In general, May is the cheapest month to fly from St. Louis to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 364. If you are unable to visit Region of Ontario during the month of May, then departing from St. Louis during the month August is also very affordable. Most momondo users find prices during this month for around C$ 416.
What is the cheapest day to depart on your flight to Region of Ontario?
The cheapest day to depart from St. Louis to Region of Ontario is on a Monday. Travellers who choose to depart for Region of Ontario on a Monday will often find tickets for as low as C$ 0. The most expensive day to fly to Region of Ontario is Sunday, with ticket prices averaging around C$ 933.
What is the cheapest time of day to depart on your flight to Region of Ontario?
Our most recent data shows that the best time of day to fly to Region of Ontario is in the evening. Flights from St. Louis to Region of Ontario during this time can be as low as C$ 0. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 933 on average. Flights to Region of Ontario from St. Louis in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Lambert-St Louis to Ontario flight route?
Fly from Lambert-St Louis to Toronto Pearson Intl for the best Lambert-St Louis - Ontario flight prices
How far in advance should I book a flight to Region of Ontario?
You are more likely to see cheaper flights to Region of Ontario from St. Louis when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around C$ 666 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from St. Louis for as low as C$ 298 on momondo.
What cabin class options are available on Lambert-St Louis to Ontario flights?
There are 1 cabin classes available to choose from on Lambert-St Louis to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
How many flights depart from St. Louis to Region of Ontario on average per day?
As of April 2025, 1 flights take off from St. Louis and land in Region of Ontario each day. The most common flight departure time for this route is 3:00p.m., with 100% of daily flights taking off in the afternoon.
How many flights depart from St. Louis to Region of Ontario on average per week?
As of April 2025, there are 9 flights per week flying from St. Louis to Region of Ontario. The most common day of the week flights depart is Wed, with 22% of flights taking off on this day.
Cheap St. Louis to Region of Ontario flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Region of Ontario
Best price found | C$ 171 |
|---|---|
Fastest flight time | 1h 55m |
Direct flights | Every day |
Airports in Region of Ontario | 2 airports |
When did momondo last update prices for flights from Lambert-St Louis Airport to Ontario?
Prices for flights from Lambert-St Louis Airport to Ontario are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Ontario?
There is 1 operator available for flights from Lambert-St Louis Airport to Ontario as of April 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Ontario?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Ontario.
What documentation or ID do you need to fly to Ontario?
The required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from St. Louis to Region of Ontario?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Region of Ontario is Canadair (Bombardier) Regional Jet 900, representing 49.19% of all bookings. The subsequent popular models are Airbus A220-300 at 35.08%, Boeing 777-300ER at 3.23%, and Boeing 777-200/200ER at 1.61%.
Best airlines flying from St. Louis to Region of Ontario
Compare and see reviews for airlines that fly from St. Louis to Region of Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 303 | Free Cancellation | Rating 7.0 9,142 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Ontario?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Ontario for you.
Can I find flights from St. Louis to Ontario with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Ontario flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Ontario?
momondo helps you find the best flight between St. Louis and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from St. Louis to Ontario right now. Can momondo alert me if prices change?
If you are not ready to book a flight from St. Louis to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.