We do not have enough data on this route to provide a reliable graph showing how many days before departure it is the best to book.
However, usually the closer it is to the departure, the more expensive the tickets are.
The most popular airlines on the route Prague Ruzyne - Detroit Metropolitan Wayne County: KLM (KL).
There is no direct flight on the route from Prague Ruzyne to Detroit Metropolitan Wayne County
Il volo con scalo più breve dura 34h 54min.
Prague Detroit (MI)