Cheap flights from St. Louis to Toronto from $176
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 Toronto departing on 11/9. 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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Fly from
Fly to
Route
Depart
Return
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Wed 11/11
6:44 pm-3:20 pm
2 stops19h 36m
Toronto Pearson Intl
Tue 11/17
12:20 pm-3:23 pm
3 stops28h 03m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Mon 11/30
6:35 pm-7:20 pm
2 stops23h 45m
Toronto Pearson Intl
Fri 12/4
6:30 am-12:12 am
1 stop18h 42m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 10/27
7:03 am-4:47 pm
1 stop8h 44m
Toronto Pearson Intl
Tue 11/3
12:44 pm-9:38 pm
1 stop9h 54m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Mon 11/2
7:00 am-4:34 pm
1 stop8h 34m
Toronto Pearson Intl
Tue 11/3
12:44 pm-9:38 pm
1 stop9h 54m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 2/2
6:30 am-3:57 pm
1 stop8h 27m
Toronto Pearson Intl
Sat 2/6
6:00 am-3:59 pm
2 stops10h 59m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Tue 2/16
6:30 am-3:57 pm
1 stop8h 27m
Toronto Pearson Intl
Tue 2/23
6:30 am-2:31 pm
1 stop9h 01m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Mon 11/2
4:05 pm-6:59 pm
Nonstop1h 54m
Toronto Pearson Intl
Sat 11/7
2:10 pm-3:26 pm
Nonstop2h 16m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Sun 11/1
4:05 pm-6:59 pm
Nonstop1h 54m
Toronto Pearson Intl
Sun 11/8
2:10 pm-3:26 pm
Nonstop2h 16m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 10/30
1:00 pm-11:52 pm
1 stop9h 52m
Toronto Pearson Intl
Mon 11/2
7:44 pm-10:12 am
1 stop15h 28m
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Thu 11/26
8:00 am-5:57 pm
1 stop8h 57m
Toronto Pearson Intl
Wed 12/9
2:45 pm-10:03 am
1 stop20h 18m
See travel insights to Toronto from
How to get the cheapest flight ticket from St. Louis to Toronto
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 typical price of a round-trip flight between St. Louis and Toronto?
Prices are currently low for flights on this route.
Typical prices usually range from $533 to $654.The lowest price recently found on this route was $374.
What is the cheapest month to fly to Toronto?
The month of March is, on average, the cheapest month to fly to Toronto from St. Louis, with most prices found around $482. If you are unable to visit Toronto during the month of March, then departing from St. Louis during the month December is also very affordable. Most momondo users find prices during this month for around $483.
What is the cheapest day to depart on your flight to Toronto?
On average, the least expensive day to fly to Toronto from St. Louis is on a Friday. momondo users have found tickets for Friday departures for as low as $803. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Saturday, with ticket prices averaging around $971.
What is the cheapest time of day to depart on your flight to Toronto?
In the morning is the cheapest time of day to fly from St. Louis to Toronto when you can find flight prices for as low as $711. Flying to Toronto in the morning is an ideal time because this is during off-peak travel hours. Flights to Toronto are more costly at noon, with an average ticket price of $1,065. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Lambert-St Louis to Toronto flight route?
Fly from Lambert-St Louis to Toronto Pearson Intl for the best Lambert-St Louis - Toronto flight prices
What cabin class options are available on St. Louis to Toronto flights?
There are 4 cabin classes available to choose from on St. Louis to Toronto flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on St. Louis to Toronto flights?
You could potentially save up to 43% on your flight if you consider stops on a St. Louis to Toronto flight.
What is the cheapest airline that flies from Lambert-St Louis to Toronto?
American Airlines and Delta are the most popular carriers operating from Lambert-St Louis to Toronto
What airlines fly to Toronto?
Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Toronto from St. Louis according to our data. Air Canada is the first choice among our users, with 73% of people opting to fly with this airline when traveling to Toronto. Keep in mind that there are 4 different airlines that fly to Toronto on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between St. Louis and Toronto?
Detroit (DTW) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.
Which layover airport offers the lowest fares from St. Louis to Toronto?
Flights via Chicago (ORD) offer the lowest average round-trip price of $610.
Which layover airport has the shortest travel time from St. Louis to Toronto?
Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 3h 44m.
Which layover airport has the shortest connection time from St. Louis to Toronto?
Detroit (DTW) has the shortest average layover time for this route: 1h 01m.
How many flights depart from St. Louis to Toronto on average per day?
The number of flights available between St. Louis and Toronto is 4 per day as of October 2026. The most frequent departure time is 8:00AM, with 50% of daily flights leaving at noon.
How many flights depart from St. Louis to Toronto on average per week?
As of October 2026, 28 flights take off from St. Louis and land in Toronto each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
When to book flights from St. Louis to Toronto
Cheap St. Louis to Toronto (STL to YTO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Toronto
Frequently asked questions about flying from St. Louis to Toronto
How far is Lambert-St Louis to Toronto by plane?
The straight-line distance from Lambert-St Louis to Toronto is 659.9 mi. A reasonable flight in good conditions will take 1h 54m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Toronto?
Prices for flights from Lambert-St Louis Airport to Toronto are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Toronto?
As of October 2026, there are 4 operators available to choose from for flights from Lambert-St Louis Airport to Toronto.
How old do you have to be to fly from Lambert-St Louis Airport to Toronto?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Toronto.
What documentation or ID do you need to fly to Toronto?
The required travel and health documents for your Toronto 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 Toronto. 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 Toronto?
Based on momondo bookings for flights between St. Louis and Toronto, the leading plane model is Canadair (Bombardier) Regional Jet 900, making up 49.04% of the total bookings. Other popular models include Embraer 175 with 28.03%, Boeing 787-8 Dreamliner with 5.73%, and Boeing 787-9 Dreamliner with 3.82%.
What is the most popular airline from St. Louis to Toronto?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Toronto is Air Canada, representing 61% of all bookings. The subsequent popular airlines are United Airlines at 20%, American Airlines at 11%, and Delta at 7%.
Best airlines flying from St. Louis to Toronto
Compare and see reviews for airlines that fly from St. Louis to Toronto with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $246 | Free Cancellation | Rating 7.8 8,628 reviews | |||
| PriceFrom $253 | Free Cancellation | Rating 7.4 10,279 reviews | |||
| PriceFrom $270 | Free Cancellation | Rating 7.0 12,127 reviews | |||
| PriceFrom $272 | Free Cancellation | Rating 7.1 11,722 reviews |
United Airlines Flights From St. Louis to Toronto
United Airlines flight deals from St. Louis to Toronto start from $253 round-trip. Over the 14 United Airlines flights for this route in a normal week, average airfare is usually $632 round-trip - but some users have found much cheaper deals with momondo.
Air Canada Flights From St. Louis to Toronto
Air Canada is also a popular choice for this route. Air Canada flight deals for St. Louis to Toronto start from as low as $272 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $606. Air Canada operates 14 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 11,722 reviews.
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Toronto?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Toronto from St. Louis.
Can I find flights from St. Louis to Toronto with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Toronto flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Toronto?
Once you have performed a search for St. Louis to Toronto 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 St. Louis to Toronto right now. Can momondo alert me if prices change?
Yes. momondo can track prices for St. Louis to Toronto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.