Cheap flights from St. Louis to Europe from $225

The cheapest month to fly to Europe from St. Louis is in February. Flight prices, which tend to average around $699, are often lower during this time because this is during the off-season. If you aren’t able to travel to Europe during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $704.

The cheapest day to depart from St. Louis to Europe is on a Thursday. Travelers who choose to depart for Europe on a Thursday will often find tickets for as low as $756. Flights from St. Louis to Europe on a Friday will generally be more expensive and average around $1,193. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Fly from Lambert-St Louis to London Heathrow for the best Lambert-St Louis - Europe flight prices

You are more likely to see cheaper flights to Europe from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Europe for around $948 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Europe from St. Louis for as low as $844 on momondo.

There are 3 cabin classes available to choose from on St. Louis to Europe 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 Europe flight.

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

United Airlines, British Airways and Lufthansa are the top three most popular airlines that fly to Europe from St. Louis according to our data. United Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Europe. Keep in mind that there are 11 different airlines that fly to Europe on a routine basis, so you have a few additional options to choose from.

3 flights are operational daily from St. Louis to Europe as of August 2026. The most popular departure time for this route is 9:00PM, with 60% of flights per day taking off in the evening.

As of August 2026, there are 25 flights per week flying from St. Louis to Europe. The most common day of the week flights depart is Tue, with 28% of flights taking off on this day.