The Best Route from Bulgaria:
The recommended route is through the "Kapitan Andreevo" border crossing, then following the highway towards Istanbul, bypassing the city via the northern ring road (O-7), and continuing on the O-5 highway towards Bursa, then following signs to Afyonkarahisar and Antalya. From Antalya, continue east on the scenic D400 coastal road to Alanya.
Estimated Travel Time (without stops):
From Sofia: ~15-16 hours
From Plovdiv: ~14-15 hours
From Burgas: ~13-14 hours
As this is the longest route, an overnight stop is highly recommended.