$142 Find Cheap Flights from Canada to St. Louis - Compare and Save

In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Vancouver, at $251 return. The most popular connection is from Toronto to St. Louis and KAYAK users have found round-trip deals for as low as $421 in the last 5 days.

Based on KAYAK data, the cheapest day to fly to St. Louis is Sunday where round-trip tickets can be as cheap as $394. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $548 on average.

The cheapest month for flights to St. Louis is August, where tickets cost $154 on average for return flights. On the other hand, the most expensive months are September and February, where the average cost of tickets from Canada is $329 and $319 respectively. For one-way flights, the best month to travel is October with an average price of $62.

The cheapest time of day to fly to St. Louis is generally in the evening, when round-trip flights cost $405 on average. The most expensive time of day to fly to St. Louis is generally at night, which is peak travel time and where the average cost of a ticket is $584.

If you’re looking for cheap airfare to St. Louis, 25% of our users found tickets to St. Louis for the following prices or less: From Toronto Pearson Intl Airport $451 round-trip, from Montreal Pierre Elliott Trudeau Intl Airport $498 round-trip.

To get a below average price, you should book around 4 weeks before departure, which saves you about 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

The duration of your flight to St. Louis depends on your departure and arrival airports. Obviously, any flights that include a layover will also be longer. The most popular routes to St. Louis on KAYAK are from Toronto, which takes 2h 05m, Montreal, which takes 2h 46m, Vancouver, which takes 7h 37m, and Calgary, which takes 8h 44m.

There are around 479 direct flights from within Canada to St. Louis every day. Most flights depart in the morning, with 30% of flights departing in the morning.

Each week there are around 3,352 direct flights from within Canada to St. Louis. The most common day for departures is Friday, with 16% of flights taking off on this day.

There are not any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to St. Louis. Instead, there are 56 short-haul flights (up to 3 hour flight duration), with the most arriving from Toronto.