When is the cheapest time of year to fly germany from st louis mo?

According to Google Flight data, the cheapest time to fly from St. Louis (STL) to Germany (DE) is typically during the low season, which is from October to April, excluding Christmas and Easter holidays. Airfares tend to be lower during these months due to reduced demand for travel. Additionally, consider flying on weekdays rather than weekends, as airfares are often higher during peak travel days.