Cheap flights from Quebec to St. Louis from C$ 319

The month of August is, on average, the cheapest month to fly to St. Louis from Quebec, with most prices found around C$ 628. If you don’t want to visit St. Louis in August, then you should wait until May to fly from Quebec, when ticket prices are also cheap, with an average price of C$ 778.

Our data shows that Friday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as C$ 789. The most expensive day to fly to St. Louis is Tuesday, with ticket prices averaging around C$ 1,701.

The cheapest time of day to fly to St. Louis is in the afternoon when flights can be purchased for as low as C$ 803. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 1,701 on average. Flights to St. Louis from Quebec in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

There is only 1 cabin class available to choose from on Quebec to St. Louis 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 14% on your flight if you consider stops on a Quebec to St. Louis flight.

As of October 2026, 2 flights take off from Quebec and land in St. Louis each day. The most common flight departure time for this route is 4:00p.m., with 100% of daily flights taking off in the afternoon.

14 flights are operational weekly from Quebec to St. Louis as of October 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.