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Cheap flights from St. Louis to Toronto from $70

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 3/27. 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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0 bags

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Find the cheapest flights from St. Louis to Toronto

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Toronto that have been recently found on momondo from popular airlines, departing in the coming months.
6:47 pm - 11:55 pmSTL-YYZ
28h 08m1 stop
7:05 am - 5:52 pmYYZ-STL
11h 47m1 stop
Tue, Apr 1 - Thu, Apr 3
6:11 pm - 11:55 pmSTL-YYZ
28h 44m1 stop
7:05 am - 5:16 pmYYZ-STL
11h 11m1 stop
Thu, Apr 17 - Sun, Apr 20
9:30 am - 8:31 pmSTL-YYZ
10h 01m1 stop
6:14 am - 2:46 pmYYZ-STL
9h 32m1 stop
$434Delta
Find Deal
Mon, Mar 31 - Mon, Apr 7
5:33 pm - 11:59 pmSTL-YYZ
5h 26m1 stop
9:00 am - 12:12 pmYYZ-STL
4h 12m1 stop
$467Air Canada
Find Deal
Thu, Mar 20 - Thu, Mar 27
9:39 am - 6:42 pmSTL-YYZ
8h 03m1 stop
8:00 am - 8:04 pmYYZ-STL
13h 04m2 stops
$485United Airlines
Find Deal
Wed, Apr 23 - Sat, Apr 26
12:03 pm - 11:00 pmSTL-YYZ
9h 57m1 stop
1:15 pm - 10:12 pmYYZ-STL
9h 57m1 stop
$489American Airlines
Find Deal
Wed, Apr 23 - Sat, Apr 26
6:00 am - 4:08 pmSTL-YYZ
9h 08m1 stop
6:15 am - 2:49 pmYYZ-STL
9h 34m1 stop
$499Delta
Find Deal
Wed, May 28 - Fri, May 30
6:29 pm - 10:50 amSTL-YYZ
15h 21m1 stop
6:15 am - 3:46 pmYYZ-STL
10h 31m1 stop
$503American Airlines
Find Deal
Sat, Mar 22 - Sat, Mar 29
4:05 pm - 7:00 pmSTL-YYZ
1h 55mnonstop
2:10 pm - 3:16 pmYYZ-STL
2h 06mnonstop
$506Air Canada
Find Deal
Sat, Jul 5 - Fri, Jul 25
9:50 am - 3:46 pmSTL-YYZ
4h 56m1 stop
6:30 pm - 7:40 pmYYZ-STL
2h 10mnonstop
$510United Airlines
Find Deal
Mon, Aug 18 - Mon, Aug 18

Air Canada flights from St. Louis to Toronto

Our best Air Canada deals on St. Louis to Toronto flight tickets
Air Canada
Mar 20
STL5:33 pmLambert-St Louis
5h 26m
1 stop
YYZ11:59 pmToronto Pearson Intl
Mar 27
YYZ9:00 amToronto Pearson Intl
4h 12m
1 stop
STL12:12 pmLambert-St Louis
Air Canada
Jul 5
STL4:05 pmLambert-St Louis
1h 55m
YYZ7:00 pmToronto Pearson Intl
Jul 25
YYZ2:10 pmToronto Pearson Intl
2h 06m
STL3:16 pmLambert-St Louis
Air Canada
May 23
STL1:30 pmLambert-St Louis
7h 09m
1 stop
YYZ9:39 pmToronto Pearson Intl
May 25
YYZ2:00 pmToronto Pearson Intl
7h 01m
1 stop
STL8:01 pmLambert-St Louis

United Airlines flights from St. Louis to Toronto

Our best United Airlines deals on St. Louis to Toronto flight tickets
United Airlines
Apr 23
STL9:39 amLambert-St Louis
8h 03m
1 stop
YYZ6:42 pmToronto Pearson Intl
Apr 26
YYZ8:00 amToronto Pearson Intl
13h 04m
2 stops
STL8:04 pmLambert-St Louis
United Airlines
Aug 18
STL9:50 amLambert-St Louis
4h 56m
1 stop
YYZ3:46 pmToronto Pearson Intl
Aug 18
YYZ6:30 pmToronto Pearson Intl
2h 10m
STL7:40 pmLambert-St Louis
United Airlines
Apr 17
STL3:30 pmLambert-St Louis
2h 00m
YYZ6:30 pmToronto Pearson Intl
Apr 20
YYZ1:40 pmToronto Pearson Intl
2h 09m
STL2:49 pmLambert-St Louis

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 cheapest month to fly to Toronto?

The month of May is, on average, the cheapest month to fly to Toronto from St. Louis, with most prices found around $242. If you are unable to visit Toronto 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 $288.

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 Monday. momondo users have found tickets for Monday departures for as low as $942. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Sunday, with ticket prices averaging around $1,047.

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 $969. 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 $1,086. 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

How far in advance should I book a flight to Toronto?

You are more likely to see cheaper flights to Toronto from St. Louis when booking 23 weeks ahead of your departure date. In general, you can expect to find flights to Toronto for around $454 when searching 23 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto from St. Louis for as low as $248 on momondo.

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.

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

As of February 2025, prices for St. Louis to Toronto flights are approximately 76% 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

$70

Fastest flight time

1h 55m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sun

Airports in Toronto

1 airport
The best one-way flight to Toronto from St. Louis in the past 72 hours is $70. The best round-trip flight deal from St. Louis to Toronto found on momondo in the last 72 hours is $215.
The fastest flight from St. Louis to Toronto takes 1h 55m
Direct flights go from St. Louis to Toronto on Monday, Tuesday, Wednesday, Thursday, Friday and Sunday. Airlines offering direct flights are: United Airlines and Air Canada.
There is 1 airport near Toronto: Toronto Pearson Intl (YYZ)

  • 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 55m.

  • 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?

  • 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?

  • What is the most popular airline 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
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $215Free CancellationRating
7.0
8,748 reviews
Search Air Canada flights
United AirlinesPriceFrom $247Free CancellationRating
7.4
8,766 reviews
Search United Airlines flights
American AirlinesPriceFrom $304Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
  • United Airlines Flights From St. Louis to Toronto

    United Airlines flight deals from St. Louis to Toronto start from $247 round-trip. Over the 7 United Airlines flights for this route in a normal week, average airfare is usually $564 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 $215 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around $495. Air Canada operates 3 flights to Toronto from St. Louis in an average week. Users have rated it 7.0/10 across 8,748 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.


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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