I am a Indian with a valid H1B visa which is not stamped. I would be traveling from PHX to BOM during the summer vacations (may-july 2019). Which are the airports I cannot transit through during my outgoing and incoming journey? The major transit points I am interested in are -
Canada Dubai Frankfurt London Paris Hong Kong Shanghai Singapore Munich Vienna Abu Dhabi Doha
Alternatively, I would be thankful if you could guide me to a resource where I can find this information.