Cheap flights from St. Louis to Paris from $391

The month of February is, on average, the cheapest month to fly to Paris from St. Louis, with most prices found around $620. If you are unable to visit Paris during the month of February, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $642.

You are more likely to see cheaper flights to Paris from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Paris for around $944 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Paris from St. Louis for as low as $844 on momondo.

You could potentially save up to 9% on your flight if you consider stops on a St. Louis to Paris flight.

As of March 2026, prices for St. Louis to Paris flights are approximately 7% more expensive when compared to flights at the same time last year.

Aer Lingus, Delta, and United Airlines are the most popular carriers operating from Lambert-St Louis to Paris

United Airlines, Air Canada and Air France are the top three most popular airlines that fly to Paris from St. Louis according to our data. United Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Paris. Keep in mind that there are 7 different airlines that fly to Paris on a routine basis, so you have a few additional options to choose from.

Atlanta (ATL) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

Flights via Atlanta (ATL) offer the lowest average round-trip price of $689.

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 11h 54m.

Atlanta (ATL) has the shortest average layover time for this route: 1h 42m.