The 12245 / 12246 Howrah - SMVT Bengaluru - Howrah Duronto Express is Superfast Express train of Duronto Express category train service of Indian Railways – by South Eastern Railway zone that runs between Howrah Junction in Kolkata, West Bengal and SMVT Bengaluru in Bengaluru, Karnataka, both in India.

It operates as train number 12245 from Howrah Junction to SMVT Bengaluru Junction and as train number 12246 in the reverse direction, serving the states of Karnataka, Andhra Pradesh, Odisha & West Bengal.

As is customary with most train services in India, coach composition may be amended at the discretion of Indian Railways depending on demand.

As the average speed of the train is above 55 km/h (34 mph), as per Indian Railways rules, its fare includes a Superfast Express surcharge.

This train runs through Howrah Chennai route up to Gudur and the speed of first section of this route, Howrah – Andul 110 kmph (As per Kharagpur Division System Map or South Eastern Railway System Map - both on South Eastern Railway Website, it is 12.274 Kms only)[2], Andul- Kharagpur 130 kmph [3] [4].