One of the essential ways to save on airfare from St. Louis to Toulouse is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 30% on airfare.
Travelers have found that booking a Wednesday departure is the best way to save up to 114% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.