Do I need to pick same carrier/airlines from my departing city to destination city (including few days of stopover in between) ? If I pick combination of airlines, it is coming cheaper to me. I was checking Los Angeles - Paris (stay for few days) - Bangalore. While coming back, I can pick any route (Bangalore to Los Angeles), which cheaper to me.
I am just trying to understand, if this is airlines, who arranges/allows stopover OR if we have appropriate visa, we can stay/visit and pick any flight for further journey ?