It's time for some speculation about what transportation teams used to get from India to Europe, specifically Vienna as best as RFF hypothesizers can tell. Most significant shortest-time flights from India to Vienna are going to connect through either Mumbai or Delhi airport. Here is the situation from Mumbai:
Nonstop is OS36 BOM VIE 0125 0535 Note- this is a 8 hour 40 minute scheduled duration and limited to Friday 12/3 and Sunday 12/5 (doesn't fly 12/4)
Alternatives connect through Munich at 2 hours 15 minutes more, Zurich at 3 hours 5 minutes more, Frankfurt at 3 hours 5 minutes, Dubai 3 hours 20 minutes, Doha 3 hours 45 minutes
Here is the situation from Delhi:
Nonstop is OS34 DEL VIE 0230 0600 Note- this is a 8 hour scheduled duration and limited to Friday 12/3 and Sunday 12/5 (doesn't fly 12/4 )
Alternatives connect through Zurich at 3 hours more, Munich at 3 hours 15 minutes more, Frankfurt 3 hours 25 minutes, Amsterdam 3 hours 35 minutes,
Helsinki 3 hours 55 minutes.
The transportation between Vienna and Zurich is assumed by some on RFF to be by train. Although it is a gorgeous route, the most rapid trains take 8 hours, leaving at 720am and 920am. I believe that this is a segment that will be done by flying. There are flights bunched into a few time frames, around 7am, 10am and 230pm, and take 85 minutes plus lead time to transit security and ticketing at Vienna airport.