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Cheap flights from St Louis to Toronto

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Flight deals from St Louis to Toronto

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Toronto? Find the lowest prices on one-way and round-trip tickets right here.
Toronto.$362 per passenger.Departing Fri, Jun 13, returning Sun, Jun 15.Round-trip flight with Frontier Airlines and Porter Airlines (Canada) Ltd.Outbound indirect flight with Frontier Airlines, departing from St Louis on Fri, Jun 13, arriving in Toronto Pearson International.Inbound indirect flight with Porter Airlines (Canada) Ltd, departing from Toronto Island on Sun, Jun 15, arriving in St Louis.Price includes taxes and charges.From $362, select.
Toronto.$401 per passenger.Departing Tue, Dec 30, returning Sun, Jan 4.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from St Louis on Tue, Dec 30, arriving in Toronto Pearson International.Inbound direct flight with Air Canada departing from Toronto Pearson International on Sun, Jan 4, arriving in St Louis.Price includes taxes and charges.From $401, select.
Toronto.$401 per passenger.Departing Sat, Oct 25, returning Sat, Nov 1.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from St Louis on Sat, Oct 25, arriving in Toronto Pearson International.Inbound direct flight with Air Canada departing from Toronto Pearson International on Sat, Nov 1, arriving in St Louis.Price includes taxes and charges.From $401, select.
Toronto.$401 per passenger.Departing Mon, Nov 10, returning Fri, Nov 14.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from St Louis on Mon, Nov 10, arriving in Toronto Pearson International.Inbound direct flight with Air Canada departing from Toronto Pearson International on Fri, Nov 14, arriving in St Louis.Price includes taxes and charges.From $401, select.
Toronto.$401 per passenger.Departing Mon, Jul 14, returning Fri, Jul 18.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from St Louis on Mon, Jul 14, arriving in Toronto Pearson International.Inbound direct flight with Air Canada departing from Toronto Pearson International on Fri, Jul 18, arriving in St Louis.Price includes taxes and charges.From $401, select.
Toronto.$402 per passenger.Departing Mon, Jun 30, returning Mon, Jul 7.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from St Louis on Mon, Jun 30, arriving in Toronto Pearson International.Inbound direct flight with Air Canada departing from Toronto Pearson International on Mon, Jul 7, arriving in St Louis.Price includes taxes and charges.From $402, select.
Toronto.$402 per passenger.Departing Thu, Jun 26, returning Mon, Jun 30.Round-trip flight with Air Canada.Outbound direct flight with Air Canada departing from St Louis on Thu, Jun 26, arriving in Toronto Pearson International.Inbound direct flight with Air Canada departing from Toronto Pearson International on Mon, Jun 30, arriving in St Louis.Price includes taxes and charges.From $402, select.
Toronto.$412 per passenger.Departing Sat, May 24, returning Mon, May 26.Round-trip flight with Air Canada.Outbound indirect flight with Air Canada, departing from St Louis on Sat, May 24, arriving in Toronto Pearson International.Inbound indirect flight with Air Canada, departing from Toronto Pearson International on Mon, May 26, arriving in St Louis.Price includes taxes and charges.From $412, select.

Find the cheapest month to fly from St Louis to Toronto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Toronto flights are currently cheapest in June.
May
from $412
Jun
from $362
Jul
from $401
Aug
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Sep
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Oct
from $493
Nov
from $401
Dec
from $415
Jan
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Feb
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Mar
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Apr
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Direct flights from St Louis to Toronto

Alternative St Louis to Toronto routes

Looking for the cheapest, fastest or easiest route from St Louis to Toronto? You could fly into the following airports instead.

St Louis to Toronto: Flight information

The things to know before you go.
Cheapest flight found$362
Cheapest month to flyJune
Average flight time1 hr, 58 mins
Most popular airlineUnited
Average flights per week33

Finding cheap flights from St Louis to Toronto: Frequently asked questions

There are 4 airports in Toronto: Toronto Island, Toronto Pearson International, Hamilton, and Kitchener / Waterloo.
The best price we found for a round-trip flight from St Louis to Toronto is $362. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 58 minutes is the average flight time from St Louis to Toronto.
United, Air Canada and PAL Airlines fly direct from St Louis to Toronto.
There are 33 flights per week flying from St Louis to Toronto, as of May 2025.
The cheapest month to fly from St Louis to Toronto is usually May 2025.
If you're flying from St Louis Airport, the cheapest airport near Toronto is Toronto Pearson International – which is 20.4 km away from the center of Toronto. We've found flights to this airport from $362.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Toronto on Friday, June 13, 2025.
Yes – the average flight time is 1 hour and 58 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Toronto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Toronto is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 12°C. July is typically the warmest month in Toronto, when it usually averages around 25°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -8°C. The rainiest month is September.
Currently, Frontier Airlines and Air Canada offer the cheapest flight tickets to Toronto.

Traveling from Lambert-St. Louis International Airport (STL) to Toronto: what you need to know

  • Around 2 hours 10 minutes is how long you can expect to be in the air on a direct flight from Lambert-St. Louis International Airport to Toronto.

  • Toronto is one hour ahead of St Louis, where Lambert-St. Louis International Airport is located. Toronto runs on the UTC-4 timezone.

  • With ten weekly departures between the two airports, Lambert-St. Louis International Airport (STL) to Pearson International Airport (YYZ) is the most popular route. Catch Air Canada's 07:30 flight to get your journey from STL to YYZ underway.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your STL to Toronto flight.

  • Taking off during a peak period like a public holiday? Expect longer queues at security and check-in. For peace of mind, arrive up to four hours before international flights and two hours before domestic departures.

  • Begin your trip at STL and travel nonstop to Pearson International Airport (YYZ). That's where you can expect to land when searching for Lambert-St. Louis International Airport to Toronto tickets.

  • Air Canada is a well-known carrier that operates direct flights from Lambert-St. Louis International Airport to Toronto.

  • Think about adding a stopover to potentially land a cheaper flight ticket from STL to Toronto. Just uncheck 'Direct flights only' during your search. Give yourself a breather (and maybe even a better deal) by stopping at one of these connection hubs:

    • Detroit Metropolitan Wayne County Airport (DTW)

    • Orlando International Airport (MCO)

    • Nashville International Airport (BNA)

  • STL is about 16 kilometers from central St Louis. If you're driving, catching a cab or ride-sharing from the center, it'll take 20 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the journey time to be around 35 minutes.

  • In search of a hotel near STL? If you've booked an early flight from Lambert-St. Louis International Airport to Toronto, these stays set you up for a seamless send-off:

  • Of all flights departing from Lambert-St. Louis International Airport, 78.04% arrive as scheduled at their destination.

  • You'll find STL at 10701 Lambert International Blvd..

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Toronto

  • $137 is the cheapest price we've seen for a one-way Lambert-St. Louis International Airport to Toronto flight. A round-trip ticket right now is $362. Depending on when you want to go and the availability, these fares may change.

  • Get cheap flights from STL to Toronto by booking one month ahead. Based on our research, that's the best time for finding a bargain.

  • Organize your trip for May. That's the best month for landing a bargain on Lambert-St. Louis International Airport to Toronto tickets. If you're flexible with your dates, use the 'Whole month' tool to find the cheapest price across each month.

  • Picking up a cheap flight from STL to Toronto couldn't be easier with Price Alerts. All you need to do is create one of these automatic notifications and we'll let you know as soon as a lower fare pops up.

  • Snag an affordable flight from Lambert-St. Louis International Airport to Toronto with the help of our filters. Choose your ideal times, airlines and number of stops, then sort the results by 'Cheapest' to see the best deals.

Airports in Toronto

Pearson International Airport (YYZ)

  • Pearson International Airport (YYZ) to the center of Toronto takes around 25 minutes by car. The center is roughly 27 kilometers away.

  • When traveling by public transport, expect a journey time of around 50 minutes.

  • The last thing you need is a lengthy journey to your hotel if you're arriving on a late flight from Lambert-St. Louis International Airport to Toronto. Stay at one of these accommodation options near YYZ instead:

  • Explore without limits with a Pearson International Airport rental car. Pick up a set of wheels from Routes Car Rentals, Green Motion or Thrifty and discover more of Toronto and beyond.

  • To lock in the lowest price, reserve your vehicle from Pearson International Airport around three weeks in advance of your flight from STL to Toronto.

Billy Bishop Toronto City Airport (YTZ)

  • Central Toronto is located around 3 kilometers from Billy Bishop Toronto City Airport (YTZ). Once your flight from Lambert-St. Louis International Airport to Toronto has hit the runway and you've made your way out of the airport, the drive should take about 35 minutes.

  • If you travel by public transport, the ride to the center takes 40 minutes or so.

  • Place the 'Do not disturb' sign on your door and rest at a hotel close to YTZ. Here are a few options where you can settle in after your STL to Toronto flight:

  • Hertz, National and Avis make collecting a Billy Bishop Toronto City Airport rental car simple. These suppliers are located in or around the terminal and will have you ready to go in a flash.

  • Avoid paying more than you need to. Reserving your ride one week ahead of your arrival at YTZ can help you lock in a better rate.

Region of Waterloo International Airport (YKF)

  • Step off your flight from Lambert-St. Louis International Airport to Toronto and head for your hotel or jump right into sightseeing. Central Toronto is around 105 kilometers from Region of Waterloo International Airport (YKF) and typically takes 1 hour 15 minutes to drive there.

  • The journey will take roughly 4 hours 5 minutes on public transport.

  • If you don't want to make your way to the center, head for a hotel close to YKF. Make yourself comfy at one of these stays after your STL to Toronto flight:

  • Start your journey without worrying about how to get to your next stop with a Region of Waterloo International Airport rental car. You can book your wheels with trusted companies here like Avis, Enterprise and Budget.

  • Rental providers sometimes offer promotions for early bookings, so book your vehicle from YKF in advance of your flight from Lambert-St. Louis International Airport to Toronto. A bit of planning goes a long way for your wallet.

Best time to go to Toronto

  • Before locking in your flights from Lambert-St. Louis International Airport to Toronto, consider which time of year works best for you. High season in Toronto offers a bustling atmosphere and plenty of things to do, while the low season brings cheaper hotel deals and fewer crowds.

  • Book a Lambert-St. Louis International Airport to Toronto flight ticket with a departure in July to experience the city during its warmest month. Expect temperatures to range from 14ºC (57ºF) to 28ºC (82ºF).

  • January has average temperatures of between -12ºC (10ºF) and 1ºC (34ºF). Look for a cheap ticket from STL to Toronto around that time if you like traveling in cooler conditions.

More about Toronto

  • Once you've booked your flight from Lambert-St. Louis International Airport to Toronto, find a hotel that keeps you close to what you want to see. Make one of these accommodation options your base for exploring Toronto:

  • Royal Ontario Museum and CN Tower are a couple of big attractions to put on your Toronto itinerary. Continue your sightseeing adventures at Go Tours Canada - Distillery District.

Explore more of Canada

  • Toronto has loads to offer, but there are so many other parts of Canada waiting to be discovered. About 499 kilometers north-east of Toronto, a trip to Montreal will keep your itinerary busy. Start with leading sights like Mount Royal Park, Montreal Botanical Garden and Saint Joseph's Oratory of Mount Royal.

  • If you're eager to discover another major stop in Canada, head for Ottawa, about 354 kilometers north-east of Toronto. Parliament Hill, Rideau Canal and National Gallery of Canada are the start of reasons to visit.

More travel options

Plan the rest of your trip from St Louis to Toronto

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.