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 Skopje - Mulhouse: Wizz Air (W6), Croatia Airlines (OU).
The cheapest flights you can book on the route Alexander The Great (SKP) - Basel-Mulhouse-Freiburg Airport (MLH).
Direct flights last about 2h 20min.
Direct flights available 4 days a week - Monday, Tuesday, Wednesday, Saturday.
Direct flights: Wizz Air (W6).