I've checked the transit visa requirements page (https://www.immihelp.com/foreign-tra...ia-usa-travel/) and I'm quite convinced that transit visa is in general not required for the travel USA -> Switzerland (Zurich) -> India (New Delhi). Although, I have a specific concern about my current situation and I feel skeptical about it. I've recently converted to H1B (not yet stamped) from F1 Visa, F1 is valid on the day of my travel. Will there be any requirement for transit visa if my H1B is not yet stamped in my case, I'm hoping not but would like an opinion? I'd appreciate any response in this regard, thanks!