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 Sofia Airport - Detroit Metropolitan Wayne County: Lufthansa (LH), British Airways (BA), KLM (KL).
There is no direct flight on the route from Sofia Airport to Detroit Metropolitan Wayne County
Il volo con scalo più breve dura 18h 21min.
Sofia Detroit (MI)