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. 2 rajdhani trains run from Patna to Guwahati - DBRT RAJDHANI (12424) and AGTL TEJAS RAJ (20502).

Patna to Guwahati DBRT RAJDHANI (12424) departs from Danapur station (DNR) at 03:48 and arrives Guwahati station (GHY) at 19:25. Patna to Guwahati rajdhani fare is Rs.3670 in First AC, Rs.2255 in Second AC and Rs.1670 in Third AC for this train which includes meal charges also.

Patna to Guwahati AGTL TEJAS RAJ (20502) departs from Patna Jn station (PNBE) at 08:10 and arrives Guwahati station (GHY) at 03:20. This train has 0 stoppages. Patna to Guwahati rajdhani fare is Rs.3685 in First AC, Rs.2180 in Second AC and Rs.1530 in Third AC for this train which includes meal charges also.

Sampark Kranti is a series of express trains in India that connects different states of India to the national capital - New Delhi. Sampark in Hindi means connectivity while Kranti is also a word in Hindi language meaning revolution. Thus these trains have revolutionized the state connectivity with center. These trains have a combination of all the classes - AC, Sleeper and Unreserved coaches. Sampark Kranti trains are for long distance journeys. These trains are named after states and Sampark Kranti train for a particular state has most of the stoppages in that state only. 2 sampark-kranti trains run from Patna to Guwahati - PORVOTR S KRNTI (22450) and NDLS SCL EXP (14038).

Patna to Guwahati PORVOTR S KRNTI (22450) departs from Patliputra station (PPTA) at 14:00 and arrives Guwahati station (GHY) at 08:00. Patna to Guwahati sampark-kranti fare is Rs.3030 in First AC, Rs.1800 in Second AC, Rs.1270 in Third AC and Rs.485 in Sleeper for this train.

Patna to Guwahati NDLS SCL EXP (14038) departs from Patliputra station (PPTA) at 14:00 and arrives Guwahati station (GHY) at 07:40. Patna to Guwahati sampark-kranti fare is Rs.2950 in First AC, Rs.1750 in Second AC, Rs.1225 in Third AC and Rs.455 in Sleeper for this train.