Cheap flights from Canada to St. Louis from $149
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Canada to St. Louis departing on 9/10. 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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How to get the cheapest flight ticket from Canada to St. Louis
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 St. Louis?
In general, June is the cheapest month to fly from Canada to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $395. The month of November is another great option to travel to St. Louis, with average flight prices from Canada averaging around $464.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $324. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $541. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Canada in the morning is the least expensive time of day to depart. momondo users have found prices as low as $326 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $487 per ticket.
What is the cheapest Canada to Lambert-St Louis flight route?
Fly from Toronto Pearson Intl to Lambert-St Louis for the best Canada - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Canada when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $485 when searching 19 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Canada for as low as $341 on momondo.
What cabin class options are available on Canada to Lambert-St Louis flights?
There are 4 cabin classes available to choose from on Canada to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Canada to Lambert-St Louis?
Air Canada, Delta, and American Airlines are the most popular carriers operating from Canada to Lambert-St Louis
What airlines fly to St. Louis?
Air Canada, United Airlines and Delta are the top three most popular airlines that fly to St. Louis from Canada according to our data. Air Canada is the first choice among our users, with 52% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Canada to St. Louis on average per day?
As of June 2025, 5 flights take off from Canada and land in St. Louis each day. The most common flight departure time for this route is 6:00PM, with 68% of daily flights taking off in the evening.
How many flights depart from Canada to St. Louis on average per week?
The number of flights available between Canada and St. Louis is 39 per week as of June 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.
Cheap Canada to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Canada to St. Louis
When did momondo last update prices for flights from Canada to Lambert-St Louis Airport?
Prices for flights from Canada to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Canada to Lambert-St Louis Airport?
As of June 2025, there are 4 operators available to choose from for flights from Canada to Lambert-St Louis Airport.
How old do you have to be to fly from Canada to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Canada to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport 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 Lambert-St Louis Airport. 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 Canada to St. Louis?
Based on momondo bookings for flights between Canada and St. Louis, the leading plane model is Canadair (Bombardier) Regional Jet 900, making up 56.35% of the total bookings. Other popular models include Airbus A220-300 with 38.75%, Airbus A319 with 1.34%, and Airbus A320-100/200 with 1.34%.
Best airlines flying from Canada to St. Louis
Compare and see reviews for airlines that fly from Canada to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $294 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $309 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $324 | Free Cancellation | Rating 7.1 9,553 reviews | |||
| PriceFrom $452 | Free Cancellation | Rating 8.0 7,963 reviews |
Traveling to a place near St. Louis?
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Why should I use momondo to find a flight deal from Canada to St. Louis?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Canada to St. Louis for you.
Can I find flights from Canada to St. Louis with flexible booking policies on momondo?
Flights from Canada to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Canada to St. Louis?
Once all potential Canada to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Canada to St. Louis right now. Can momondo alert me if prices change?
If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Canada and alert you when they change.