Fly nonstop from Denver to Frankfurt for $684 round-trip on Lufthansa.
Seen below, we found seats departing DEN on Tuesday, October 4, returning from FRA on Tuesday, October 11.
Other dates are also available for travel through spring 2017.
See our fare details for booking info.
Need a room in Frankfurt? Here's what's available for the above dates on Hotelwatchdog.