Even if it goes via chennai the difference should not be more then 60 mins as difference is hardly 50km. When duronto does HWH blore in 29 hrs this humsafar should do it in 30 hrs via chennai as travellers are paying 15% as base fare and flexi fares for 50% seats. This is not an exception as other HS are also taking more time then premium trains in that routes.