45-90 minutes by taxi.
Pre-paid taxis are the recommended way of reaching TIFR from Mumbai's airports. There are counters for pre-paid taxis before you exit the arrival hall. Specify your destination as "Navy Nagar, Colaba".
You will be given a receipt for your payment. Retain this till the end of your ride; then hand it over to the taxi driver. At the exit from the airport, the police may want to look at this slip.
20-30 mins by taxi.
Taxis are available from the Chhatrapati Shivaji Terminus. They charge by meter. The meter reading is converted to a fae according to this chart. Alternatively, buses (routes 3, 6 Ltd, 136) come to Navy Nagar from outside the local station at CST. TIFR is on the same road as the Navy Nagar bus terminus, which is where you should get off.
30-45 mins by taxi.
Taxis are available from the ranks outside the station.
Alternatively, you could cross over to the local station and board
a Churchgate bound local. You have to buy a separate ticket for
the local train. Taxis are available from outside Churchgate.
Alternately, a bus (route 137) comes from Churchgate to the Navy
Nagar terminus, down the road from TIFR.
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