Unless they have definite frequency of 60 mins in 3 directions of terminals from 1. Benguluru Cantt for CBD, Indiranagara and Koramangala, 2 Whitefield for KR Pura ORR Silk Board 3. Kengeri via Central Yesvantpur to cover west Bengaluru they will not be takers for Airport from 400 to 2100. Even a 400 dep train a traveller can catch a flight from 630-700 while deps start from 500 and arrivals upto 2300.