I had the same problem when I tried to build an itinerary across Europe last year, and what really helped me was using
https://flyer-club.com/p/region/europe/ . The platform focuses specifically on European routes and gives you options that balance price, convenience, and speed. Instead of just comparing random tickets, it allows you to design the entire trip step by step — whether you want fast connections between major cities like Paris and Rome, or more budget-friendly flights to smaller destinations. It also shows how to minimize long layovers, which is especially useful if you’re trying to see a lot in a short period of time.