Cheap flights from St. Louis to Toronto from C$ 188
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YTO
26 Nov — 3 Dec1
Round-trip
1 adult
Economy
Round-trip
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Lambert-St Louis to Toronto are usually found in January or March, booked 53 days in advance, depart on a Thursday or Monday and return on a Sunday
Cheap flight deals from St. Louis to Toronto
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from St. Louis to Toronto
Explore the most affordable flight options available from St. Louis to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2026.
Wed 2/126:13 p.m. -
1 stop18h 27m
Mon 7/122:25 p.m. -
2 stops45h 52m
Deal found 25/10C$ 517
Wed 2/1212:05 p.m. -
2 stops24h 35m
Sun 6/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 533
Wed 9/1212:02 p.m. -
2 stops28h 08m
Wed 16/1211:30 a.m. -
1 stop30h 20m
Deal found 25/10C$ 541
Mon 16/117:26 a.m. -
1 stop9h 15m
Wed 18/113:15 p.m. -
1 stop8h 00m
Deal found 26/10C$ 545
Wed 2/1212:05 p.m. -
2 stops24h 35m
Tue 8/127:15 a.m. -
1 stop17h 57m
Deal found 25/10C$ 551
Mon 7/126:20 p.m. -
1 stop18h 50m
Mon 14/122:25 p.m. -
2 stops45h 52m
Deal found 23/10C$ 555
Wed 2/1212:05 p.m. -
2 stops24h 35m
Sat 5/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 561
Fri 4/1212:02 p.m. -
2 stops22h 22m
Sun 6/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 601
Fri 11/126:20 p.m. -
1 stop18h 20m
Sun 13/127:15 a.m. -
1 stop17h 57m
Deal found 22/10C$ 610
Fri 4/1212:02 p.m. -
2 stops22h 22m
Mon 7/126:30 a.m. -
1 stop18h 42m
Deal found 24/10C$ 612
Best flights from St. Louis to Toronto
Discover carefully curated flight deals from St. Louis to Toronto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 27 October 2026.
Tue 8/121:00 p.m. -
1 stop9h 41m
Tue 15/1210:00 a.m. -
2 stops11h 32m
Deal found 23/10C$ 664
Thu 10/126:20 p.m. -
1 stop18h 20m
Thu 17/126:20 p.m. -
2 stops31h 21m
Deal found 26/10C$ 761
Thu 26/115:00 a.m. -
2 stops9h 45m
Wed 9/123:22 p.m. -
1 stop7h 55m
Deal found 27/10C$ 862
Thu 26/114:05 p.m. -
Nonstop2h 00m
Wed 9/122:10 p.m. -
Nonstop2h 16m
Deal found 27/10C$ 1,203
Fri 4/128:02 a.m. -
1 stop5h 01m
Fri 4/124:30 p.m. -
1 stop7h 29m
Deal found 25/10C$ 1,207
Thu 28/110:45 a.m. -
2 stops11h 28m
Sun 31/110:20 a.m. -
2 stops11h 17m
Deal found 22/10C$ 862
Thu 26/116:13 a.m. -
2 stops10h 07m
Wed 9/126:00 a.m. -
1 stop10h 54m
Deal found 26/10C$ 953
Fri 5/210:45 a.m. -
2 stops11h 28m
Mon 8/212:15 p.m. -
2 stops12h 03m
Deal found 23/10C$ 954
Mon 9/111:08 p.m. -
1 stop7h 07m
Fri 13/112:10 p.m. -
Nonstop2h 16m
Deal found 26/10C$ 1,217
Tue 1/126:30 a.m. -
1 stop13h 45m
Thu 3/122:10 p.m. -
Nonstop2h 16m
Deal found 23/10C$ 1,225
Sun 29/115:30 p.m. -
1 stop5h 27m
Thu 3/127:45 a.m. -
1 stop9h 09m
Deal found 25/10C$ 1,116
Direct flights from St. Louis to Toronto
Explore direct flight options from St. Louis to Toronto based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 October 2026.
Thu 26/114:05 p.m. -
Nonstop2h 00m
Wed 9/122:10 p.m. -
Nonstop2h 16m
Deal found 27/10C$ 1,203
Fri 11/124:05 p.m. -
Nonstop2h 00m
Sun 13/122:10 p.m. -
Nonstop2h 16m
Deal found 22/10C$ 1,292
Tue 1/124:05 p.m. -
Nonstop2h 00m
Thu 3/122:10 p.m. -
Nonstop2h 16m
Deal found 23/10C$ 1,323
Sat 3/44:10 p.m. -
Nonstop1h 57m
Wed 7/42:10 p.m. -
Nonstop2h 16m
Deal found 26/10C$ 1,338
Sun 15/114:05 p.m. -
Nonstop2h 00m
Sun 22/112:10 p.m. -
Nonstop2h 16m
Deal found 25/10C$ 1,437
Thu 28/14:05 p.m. -
Nonstop2h 00m
Sun 31/12:10 p.m. -
Nonstop2h 16m
Deal found 22/10C$ 1,444
Sat 6/34:05 p.m. -
Nonstop2h 00m
Wed 10/32:10 p.m. -
Nonstop2h 16m
Deal found 25/10C$ 1,473
Sat 28/114:05 p.m. -
Nonstop2h 00m
Sat 5/122:10 p.m. -
Nonstop2h 16m
Deal found 25/10C$ 1,501
Thu 26/114:05 p.m. -
Nonstop2h 00m
Fri 27/112:10 p.m. -
Nonstop2h 16m
Deal found 23/10C$ 1,504
Mon 9/114:05 p.m. -
Nonstop2h 00m
Fri 13/112:10 p.m. -
Nonstop2h 16m
Deal found 23/10C$ 1,533
Wed 17/24:05 p.m. -
Nonstop2h 00m
Sun 21/22:10 p.m. -
Nonstop2h 16m
Deal found 25/10C$ 1,560
Thu 11/34:05 p.m. -
Nonstop2h 00m
Sat 13/32:10 p.m. -
Nonstop2h 16m
Deal found 25/10C$ 1,577
Last-minute flights from St. Louis to Toronto
Discover last-minute flight deals from St. Louis to Toronto. Data last updated 27 October 2026 and is based on user searches.
Mon 9/116:00 a.m. -
1 stop8h 49m
Fri 13/1111:36 a.m. -
1 stop8h 46m
Deal found 23/10C$ 659
Mon 9/116:34 p.m. -
2 stops19h 16m
Thu 12/116:30 a.m. -
1 stop17h 46m
Deal found 23/10C$ 660
Thu 12/117:00 a.m. -
1 stop8h 34m
Sun 15/1111:36 a.m. -
1 stop8h 46m
Deal found 22/10C$ 635
Mon 16/117:26 a.m. -
1 stop9h 15m
Wed 18/113:15 p.m. -
1 stop8h 00m
Deal found 26/10C$ 545
Mon 16/116:34 p.m. -
2 stops21h 36m
Wed 18/119:20 a.m. -
3 stops26h 14m
Deal found 26/10C$ 631
Thu 19/116:59 a.m. -
1 stop8h 34m
Sat 21/1111:45 a.m. -
1 stop8h 42m
Deal found 22/10C$ 621
Thu 19/112:00 p.m. -
2 stops27h 10m
Sat 21/115:15 p.m. -
1 stop7h 44m
Deal found 22/10C$ 666
Tue 24/116:05 p.m. -
1 stop20h 13m
Tue 1/127:15 a.m. -
2 stops28h 55m
Deal found 25/10C$ 669
Mon 30/116:05 p.m. -
1 stop19h 05m
Mon 7/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 663
Mon 30/116:05 p.m. -
1 stop19h 05m
Sun 6/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 664
One-way flights from St. Louis to Toronto
Search for one-way flight options from St. Louis to Toronto. Find affordable one-way fares based on user searches. Data last updated 27 October 2026.
Wed 9/1212:02 p.m. -
2 stops28h 08m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 25/10C$ 188
Fri 4/1212:02 p.m. -
2 stops22h 22m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 24/10C$ 203
Wed 25/111:14 p.m. -
1 stop9h 45m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 23/10C$ 231
Tue 3/114:05 p.m. -
Nonstop2h 00m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 25/10C$ 249
Tue 15/126:20 p.m. -
1 stop18h 20m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 22/10C$ 262
Tue 15/126:48 a.m. -
1 stop8h 42m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 22/10C$ 265
Wed 16/1212:02 p.m. -
2 stops34h 45m
Wed 31/1212:00 a.m. -
Nonstop0h 00m
Deal found 22/10C$ 287
Find flight deals from St. Louis to Toronto
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Toronto (YTO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 October 2026.
Customize your flight search to find flights from St. Louis to Toronto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 27 October 2026.
Use the filters below to find and compare flights from St. Louis to Toronto that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest round-trip
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 4/12
12:02 p.m.-11:24 a.m.
2 stops22h 22m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 203
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Wed 9/12
6:20 p.m.-1:40 p.m.
1 stop18h 20m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 273
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 20/11
3:04 p.m.-6:51 a.m.
2 stops38h 47m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 355
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Wed 4/11
2:00 p.m.-3:20 p.m.
3 stops24h 20m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 364
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 25/12
1:20 p.m.-11:52 p.m.
1 stop9h 32m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 371
Quickest round-trip
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Wed 4/11
7:26 a.m.-12:32 p.m.
1 stop4h 06m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 427
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 13/11
12:14 p.m.-11:20 p.m.
2 stops34h 06m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 429
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Sun 8/11
4:26 p.m.-9:52 p.m.
3 stops52h 26m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 458
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Fri 25/12
6:21 p.m.-3:20 p.m.
3 stops43h 59m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 491
St. LouisToronto
STL Lambert-St Louis - YYZ Toronto Pearson Intl
STLYYZ
Lambert-St Louis
Mon 2/11
7:59 p.m.-2:50 p.m.
3 stops41h 51m
Toronto Pearson Intl
Wed 31/12
12:00 a.m.-11:00 p.m.
Nonstop0h 00m
C$ 510
Flights are sorted by cheapest round-trip flights first.
Deals found on 24/10
Showing 1-10 of 21 resultsSorted by cheapest first
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Best time to book a flight from St. Louis to Toronto
Have a flexible travel schedule? Discover the best time to fly to Toronto from St. Louis with our price prediction graph.
STL-YTO
STL-YYZ
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Toronto
STL-YTO
STL-YYZ
What is the cheapest month to book a flight from St. Louis to Toronto?
Currently, March is the cheapest month in which you can book a flight from St. Louis to Toronto (average of C$ 676). Flying from St. Louis to Toronto in January is currently the most expensive (average of C$ 1,029). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to YTO?
Find hourly flight availability from St. Louis to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 October 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Toronto as you normally would.
How much does it cost to fly round-trip from St. Louis to Toronto?
Airfare is below average for this route at the moment.
St. Louis to Toronto flights typically cost between C$ 716 and C$ 1,047 in December.The cheapest round-trip price found within the last 5 days was C$ 517 on Multiple Airlines (2 Dec-7 Dec).
How far ahead should I book a flight from St. Louis to Toronto?
Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Toronto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly from for flights from St. Louis to Toronto?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Toronto. On average, Lambert-St Louis has 0 outbound flights to Toronto per day from 1 airline. Lambert-St Louis is conveniently located just 20.4 km from St. Louis’s city centre.
How long is the flight from St. Louis to Toronto?
A quick flight from St. Louis to Toronto can take about 9h 41m. Delta provides one of the quickest options available for as low as C$ 664. The distance between St. Louis and Toronto is about 1051 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What is the cheapest airline to fly from St. Louis to Toronto round-trip?
Our cheapest airline available from St. Louis to Toronto is Air Canada. Our recent data shows that you can find tickets from as low as C$ 332 on this airline. Users have found that Air Canada is 62% cheaper than the other options available to this destination.
What are the most reliable airlines from St. Louis to Toronto?
Consider United Airlines (80%), Air Canada (79%) or Jazz (79%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto.
What are the cheapest flights from St. Louis to Toronto?
While on average a flight from St. Louis to Toronto is generally C$ 1,200, our data shows the cheapest flight currently is C$ 228. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 541 for that flight.
Can I find deals for business class flights from St. Louis to Toronto?
Yes. Cheapflights offers flight deals from St. Louis to Toronto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Toronto?
Currently, March is the cheapest month in which you can book a flight from St. Louis to Toronto (average of C$ 676). Flying from St. Louis to Toronto in January is currently the most expensive (average of C$ 1,029). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on 27 October 2026.
Explore flights to Toronto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 27 October 2026.
Discover the top airline that operate flights from St. Louis to Toronto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 27 October 2026.
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from St. Louis to Toronto?
Deals for St. Louis to Toronto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from St. Louis to Toronto?
Cheapflights simply makes it quick and affordable to book flights from St. Louis to Toronto by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from St. Louis to Toronto with no change fees?
Yes! Cheapflights helps users easily find flights from St. Louis to Toronto with no change fees.
Can Cheapflights notify me if prices for flights from St. Louis to Toronto become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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