What is the cheapest airline that flies from Lambert-St Louis to Toronto?

American Airlines is the most popular carrier operating from Lambert-St Louis to Toronto

Which layover airport offers the lowest fares from St. Louis to Toronto?

Flights via Chicago (ORD) offer the lowest average round-trip price of $729.

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?

Chicago (ORD) has the shortest average layover time for this route: 0h 51m.

Which airport is the most popular layover for flights between St. Louis and Toronto?

Detroit (DTW) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

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 64% of people opting to fly with this airline when traveling to Toronto. Keep in mind that there are 3 different airlines that fly to Toronto on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Toronto on average per week?

As of April 2026, 14 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.

How many flights depart from St. Louis to Toronto on average per day?

The number of flights available between St. Louis and Toronto is 2 per day as of April 2026. The most frequent departure time is 4:00PM, with 100% of daily flights leaving in the afternoon.

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 April 2026, there are 3 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.

$137 Cheap Flights from St. Louis to Toronto in 2026

Q: 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 $701 to $512. The lowest price recently found on this route was $333.

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Find the cheapest flights from St. Louis to Toronto

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 5:44 pm

STL

YYZ

9h 44m

1 stop

11:39 am - 8:30 pm

YYZ

STL

9h 51m

1 stop

$333American Airlines

Wed, Jun 17 - Wed, Jun 24

6:33 pm - 8:55 pm

STL

YYZ

25h 22m

2 stops

9:50 am - 11:57 pm

YYZ

STL

15h 07m

1 stop

$358Multiple Airlines

Thu, May 28 - Tue, Jun 2

6:00 am - 2:30 pm

STL

YYZ

7h 30m

1 stop

1:15 pm - 8:30 pm

YYZ

STL

8h 15m

1 stop

$369American Airlines

Thu, May 28 - Tue, Jun 2

8:17 pm - 9:55 pm

STL

YYZ

48h 38m

2 stops

7:10 am - 12:21 am

YYZ

STL

18h 11m

1 stop

$372Multiple Airlines

Mon, May 4 - Mon, May 11

5:51 am - 2:33 pm

STL

YYZ

7h 42m

1 stop

3:13 pm - 10:19 pm

YYZ

STL

8h 06m

1 stop

$375American Airlines

Thu, Apr 30 - Tue, May 5

5:51 am - 2:33 pm

STL

YYZ

7h 42m

1 stop

3:13 pm - 10:17 pm

YYZ

STL

8h 04m

1 stop

$381American Airlines

Thu, Apr 30 - Wed, May 6

8:17 pm - 9:55 pm

STL

YYZ

48h 38m

2 stops

7:10 am - 12:21 am

YYZ

STL

18h 11m

1 stop

$388Multiple Airlines

Mon, May 4 - Mon, May 11

6:33 pm - 8:55 pm

STL

YYZ

25h 22m

2 stops

9:50 am - 11:57 pm

YYZ

STL

15h 07m

1 stop

$403Multiple Airlines

Thu, May 28 - Tue, Jun 2

8:23 pm - 11:35 am

STL

YYZ

38h 12m

2 stops

7:45 am - 12:14 am

YYZ

STL

17h 29m

1 stop

$405Multiple Airlines

Wed, Apr 29 - Wed, Jun 10

5:51 am - 5:43 pm

STL

YYZ

10h 52m

1 stop

3:13 pm - 10:17 pm

YYZ

STL

8h 04m

1 stop

$407American Airlines

Sat, May 2 - Mon, May 4

American Airlines flights from St. Louis to Toronto

Our best American Airlines deals on St. Louis to Toronto flight tickets

American Airlines

Jun 17

STL7:00 amLambert-St Louis

9h 44m

1 stop

YYZ5:44 pmToronto Pearson Intl

Jun 24

YYZ11:39 amToronto Pearson Intl

9h 51m

1 stop

STL8:30 pmLambert-St Louis

$333

American Airlines

May 28

STL6:00 amLambert-St Louis

7h 30m

1 stop

YYZ2:30 pmToronto Pearson Intl

Jun 2

YYZ1:15 pmToronto Pearson Intl

8h 15m

1 stop

STL8:30 pmLambert-St Louis

$369

American Airlines

Apr 30

STL5:51 amLambert-St Louis

7h 42m

1 stop

YYZ2:33 pmToronto Pearson Intl

May 5

YYZ3:13 pmToronto Pearson Intl

8h 06m

1 stop

STL10:19 pmLambert-St Louis

$375

Air Canada flights from St. Louis to Toronto

Our best Air Canada deals on St. Louis to Toronto flight tickets

Air Canada

May 9

STL7:05 amLambert-St Louis

1h 51m

YYZ9:56 amToronto Pearson Intl

May 10

YYZ7:00 pmToronto Pearson Intl

2h 09m

STL8:09 pmLambert-St Louis

$473

Air Canada

May 9

STL7:05 amLambert-St Louis

1h 51m

YYZ9:56 amToronto Pearson Intl

May 10

YYZ4:00 pmToronto Pearson Intl

5h 25m

1 stop

STL8:25 pmLambert-St Louis

$476

Air Canada

May 21

STL7:05 amLambert-St Louis

1h 51m

YYZ9:56 amToronto Pearson Intl

May 24

YYZ7:00 pmToronto Pearson Intl

2h 09m

STL8:09 pmLambert-St Louis

$478

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 6/17

7:00 am-5:44 pm

1 stop9h 44m

Toronto Pearson Intl

Wed 6/24

11:39 am-8:30 pm

1 stop9h 51m

$333

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/28

6:33 pm-8:55 pm

2 stops25h 22m

Toronto Pearson Intl

Tue 6/2

9:50 am-11:57 pm

1 stop15h 07m

$358

Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/28

6:00 am-2:30 pm

1 stop7h 30m

Toronto Pearson Intl

Tue 6/2

1:15 pm-8:30 pm

1 stop8h 15m

$369

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 5/4

8:17 pm-9:55 pm

2 stops48h 38m

Toronto Pearson Intl

Mon 5/11

7:10 am-12:21 am

1 stop18h 11m

$372

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 4/30

5:51 am-2:33 pm

1 stop7h 42m

Toronto Pearson Intl

Tue 5/5

3:13 pm-10:19 pm

1 stop8h 06m

$375

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 4/30

5:51 am-2:33 pm

1 stop7h 42m

Toronto Pearson Intl

Wed 5/6

3:13 pm-10:17 pm

1 stop8h 04m

$381

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 5/4

8:17 pm-9:55 pm

2 stops48h 38m

Toronto Pearson Intl

Mon 5/11

7:10 am-12:21 am

1 stop18h 11m

$388

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/28

6:33 pm-8:55 pm

2 stops25h 22m

Toronto Pearson Intl

Tue 6/2

9:50 am-11:57 pm

1 stop15h 07m

$403

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 4/29

8:23 pm-11:35 am

2 stops38h 12m

Toronto Pearson Intl

Wed 6/10

7:45 am-12:14 am

1 stop17h 29m

$405

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 5/2

5:51 am-5:43 pm

1 stop10h 52m

Toronto Pearson Intl

Mon 5/4

3:13 pm-10:17 pm

1 stop8h 04m

$407

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

What is the typical price of a round-trip flight between St. Louis and Toronto?

What is the cheapest month to fly to Toronto?

The month of June is, on average, the cheapest month to fly to Toronto from St. Louis, with most prices found around $403. If you are unable to visit Toronto during the month of June, then departing from St. Louis during the month December is also very affordable. Most momondo users find prices during this month for around $469.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $832. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Thursday, with ticket prices averaging around $927.

What is the cheapest time of day to depart on your flight to Toronto?

In the afternoon is the cheapest time of day to fly from St. Louis to Toronto when you can find flight prices for as low as $811. Flying to Toronto in the afternoon 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 $1,046. 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 Lambert-St Louis to Toronto flights?

There are 4 cabin classes available to choose from on Lambert-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?

No. A direct flight is the cheapest option for a flight between St. Louis to Toronto.

How have St. Louis to Toronto flight prices changed over time?

As of April 2026, prices for St. Louis to Toronto flights are approximately 145% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Toronto

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Toronto according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

Best Price Found	$464
Fastest flight time	1h 51m
Direct flights	Every day
Airports in Toronto	3 airports

The best one-way flight to Toronto from St. Louis in the past 72 hours is $464. The best round-trip flight deal from St. Louis to Toronto found on momondo in the last 72 hours is $806.

The fastest flight from St. Louis to Toronto takes 1h 51m

Direct flights go from St. Louis to Toronto every day.

There are 3 airports in Toronto. From St. Louis there are direct flights to Toronto Pearson Intl (YYZ).

Search flight deals

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 51m.
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 April 2026, there are 3 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 Embraer 175, making up 24.84% of the total bookings. Other popular models include Boeing 787-8 Dreamliner with 18.47%, Canadair (Bombardier) Regional Jet 900 with 17.83%, and Airbus A220-300 with 14.01%.
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 55% of all bookings. The subsequent popular airlines are United Airlines at 24%, American Airlines at 14%, and Delta at 8%.

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
United Airlines	PriceFrom $199	Free Cancellation	Rating 7.4 9,546 reviews	Search United Airlines flights
Air Canada	PriceFrom $220	Free Cancellation	Rating 7.1 10,896 reviews	Search Air Canada flights
American Airlines	PriceFrom $270	Free Cancellation	Rating 7.1 11,550 reviews	Search American Airlines flights

United Airlines Flights From St. Louis to Toronto
United Airlines flight deals from St. Louis to Toronto start from $199 round-trip. Over the 7 United Airlines flights for this route in a normal week, average airfare is usually $448 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 $220 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $588. Air Canada operates 7 flights to Toronto from St. Louis in an average week. Users have rated it 7.1/10 across 10,896 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.

An easier way to manage your Toronto trip

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Fly into one of these airports located in Toronto

Toronto Region of Waterloo Intl Airport

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Cheap flights from St. Louis to Toronto from $137

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 6/17. 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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American Airlines flights from St. Louis to Toronto

Our best American Airlines deals on St. Louis to Toronto flight tickets

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Our best Air Canada deals on St. Louis to Toronto flight tickets

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See travel insights to Toronto from

How to get the cheapest flight ticket from St. Louis to Toronto

What is the typical price of a round-trip flight between St. Louis and Toronto?

What is the cheapest month to fly to Toronto?

What is the cheapest day to depart on your flight to Toronto?

What is the cheapest time of day to depart on your flight to Toronto?

What is the cheapest Lambert-St Louis to Toronto flight route?

What cabin class options are available on Lambert-St Louis to Toronto flights?

Can stopping save me money on St. Louis to Toronto flights?

How have St. Louis to Toronto flight prices changed over time?

What is the cheapest airline that flies from Lambert-St Louis to Toronto?

What airlines fly to Toronto?

Which airport is the most popular layover for flights between St. Louis and Toronto?

Which layover airport offers the lowest fares from St. Louis to Toronto?

Which layover airport has the shortest travel time from St. Louis to Toronto?

Which layover airport has the shortest connection time from St. Louis to Toronto?

How many flights depart from St. Louis to Toronto on average per day?

How many flights depart from St. Louis to Toronto on average per week?

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

Best Price Found

Fastest flight time

Direct flights

Airports in Toronto

Frequently asked questions about flying from St. Louis to Toronto

Best airlines flying from St. Louis to Toronto

Compare and see reviews for airlines that fly from St. Louis to Toronto with momondo

United Airlines Flights From St. Louis to Toronto

Air Canada Flights From St. Louis to Toronto

Why use momondo?

An easier way to manage your Toronto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Fly into one of these airports located in Toronto

Airports listed have a maximum distance of 52.0 mi from Toronto

Fly your favorite airline to Toronto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Toronto

List of cabin classes available on flights landing in Toronto. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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