I have 2 domestic flights with different airlines booked on separate tickets. The first flight arrives at T1 and the second is Vistara from T3.
Having allowed plenty of time to change terminals, the first flight has been moved by several hours and I now only have 2 hours and 20 minutes between scheduled arrival of the first flight and departure of the Vistara flight.
I believe that Vistara check-in closes one hour before departure so that only leaves 1 hour 20 minutes to deplane, collect bags and get across from T1 to T3.
Is this likely to be enough time to reach Vistara check-in before it closes?