Instead of telling more reasons, following ideas may be explored:
1. Run hourly services from SBC, YPR, KJM to YNK.
2. BMTC can run regular bus services from YNK Rly stn.
3. BMTC can run non-AC services from Hebbal and Yelahanka NES to Airport.
In...
more... Chennai, one can get down in front of the airport from City bus. CMBT to Airport costs just 15 rupees. Why not explore such an arrangement by cash rich BMTC??