Cheap flights from St. Louis to Canada from $118

If you aren’t able to travel during the month of March, then book flights to Canada from St. Louis during November instead. Flights to Canada in November, while not as cheap as those in March, still average around $536.

Our data shows that Friday is the least expensive day to fly to Canada. Tickets to fly out on this day can be as low as $788. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Canada for around $967.

In the morning is the cheapest time of day to fly from St. Louis to Canada when you can find flight prices for as low as $709. Flying to Canada in the morning is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Canada is at noon when prices are around $1,066.

Fly from Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl for the best Lambert-St Louis - Canada flight prices

There are 4 cabin classes available to choose from on St. Louis to Canada flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 40% on your flight if you consider stops on a St. Louis to Canada flight.

American Airlines, United Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to Canada

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Canada from St. Louis according to our data. Air Canada is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Canada. Keep in mind that there are 6 different airlines that fly to Canada on a routine basis, so you have a few additional options to choose from.

As of October 2026, there are 1 flights per day flying from St. Louis to Canada. The most common time of day flights depart is 8:00AM, with 57% of flights taking off in the afternoon.

8 flights are operational weekly from St. Louis to Canada as of October 2026. The most popular departure day for this route is Wed, with 25% of flights per week taking off on this day.