Rajdhani express are premium category trains by the Indian Railways that redefines luxury travelling in India. It is a fully air-conditioned train which connects country capital (Delhi) with state capitals. That is why they are called 'Rajdhani' which translates to 'Capital' in English. These train runs at very high speed and therefore it usually takes least time to reach destination compared to other trains on the same route. Mumbai rajdhani is the fastest rajdhani train which attains a maximum speed of 140 kmph on some stretch. Rajdhani Express offers catering facilities inside the train the fare of which is included in ticket fare. Rajdhani trains have 3 classes - First AC (1A), AC II-tier (2A) and AC III-tier (3A) only and they are coupled with LHB coaches that have higher safety features. The ticket fare for Rajdhani is maximum amongst all trains on the same route and has dynamic fare (Flexi Fare) system. Waitlisted passengers are strictly not allowed inside this train. Rajdhani train coaches are usually painted in red with a grey colored strip outside. 1 rajdhani train runs from Patna to Kolkata - KOLKATA RAJDHNI (12306).

Patna to Kolkata KOLKATA RAJDHNI (12306) departs from Patna Jn station (PNBE) at 04:30 and arrives Howrah Jn station (HWH) at 12:15. This train has 0 stoppages. Patna to Kolkata rajdhani fare is Rs.2515 in First AC, Rs.1525 in Second AC and Rs.1120 in Third AC for this train which includes meal charges also.

Duronto express is a newer premium class of train which runs as fast as Rajdhanis. Duronto word comes from restless in Bengali as these trains had no intermediate commercial stops when they started. But since Indian Railways incurred losses for these trains, some technical stops were converted to commercial stops. On some routes (such as Delhi-Kolkata) they take lesser time than corresponding Rajdhani express. Unlike rajdhani some durontos also have non-air conditioned sleeper class. Thus, Duronto trains have classes First AC (1A), AC II-tier, AC III-tier and Sleeper. Bed-rolls in sleeper class of Mixed Duronto Express trains will be supplied to passengers on demand, on payment of stipulated charges. Duronto trains are distinguished by vibrant and colorful vinyl coating on the outer surface of the coaches. 2 duronto trains run from Patna to Kolkata - HWH DURONTO EXP (12274) and DURONTO EXP (22214).

Patna to Kolkata HWH DURONTO EXP (12274) departs from Patna Jn station (PNBE) at 00:55 and arrives Howrah Jn station (HWH) at 10:35. This train has 0 stoppages. Patna to Kolkata duronto fare is Rs.2515 in First AC, Rs.1525 in Second AC, Rs.1120 in Third AC, Rs.965 in Third Economy and Rs.435 in Sleeper for this train which includes meal charges also.

Patna to Kolkata DURONTO EXP (22214) departs from Patna Jn station (PNBE) at 20:45 and arrives Kolkata Shalimar station (SHM) at 05:45. Patna to Kolkata duronto fare is Rs.2445 in First AC, Rs.1460 in Second AC and Rs.1050 in Third AC for this train which includes meal charges also.

Jan Shatabdi express as the name indicates is the shatabdi express for Jan (common mass). Basically these trains are an affordable version of Shatabdi trains in India. Therefore Jan Shatabdi trains have either seating arrangements as air-conditioned Chair Car (CC) or non air-conditioned Second Seating (2S) coaches. These are very pocket friendly compared to other trains on same route. These trains are for short distances and does not run overnight just like Shatabdi trains. It does not have onboard catering services which is there in Shatabdi trains. In general these trains are painted in white and blue combination with window panes painted either white or blue. 1 jan-shatabdi train runs from Patna to Kolkata - JANSHATABDI EXP (12024).

Patna to Kolkata JANSHATABDI EXP (12024) departs from Patna Jn station (PNBE) at 05:30 and arrives Howrah Jn station (HWH) at 13:25. This train has 0 stoppages. Patna to Kolkata jan-shatabdi fare is Rs.790 in Chair Car and Rs.225 in Second Seater for this train.

The concept of Garib Rath started with the vision to provide air conditioned berths at a comparatively low price for the people who could not afford to travel in AC coaches. Garib-rath phrase translates to poor man's chariot in English. The fare in this train is almost two-thirds of regular third ac fare. Usually Garib Rath have Third AC (3A) class only excepting some 1-2 trains which also have Chair Car (CC) class. The compartments of these train coaches have 9 berths making an extra space for side middle berth which is not there in any other train in India. In case passengers want to have bedrolls they need to pay separately for it. Some garib-raths run as fast as rajdhani, but they have lesser priority for track clearance compared to them. These trains are painted green with a yellow colored strip along the window panes. 1 garib-rath train runs from Patna to Kolkata - KOL GARIB RATH (12360).

Patna to Kolkata KOL GARIB RATH (12360) departs from Rajendra Nagar Bihar station (RJPB) at 20:12 and arrives Kolkata Chitpur station (KOAA) at 05:30. Patna to Kolkata garib-rath fare is Rs.640 in Third AC for this train.