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. 3 rajdhani trains run from Delhi to New Bongaigaon - DBRT RAJDHANI (12424), DBRG RAJDHANI (20504) and DBRG RAJDHANI (20506).

Delhi to New Bongaigaon DBRT RAJDHANI (12424) departs from New Delhi station (NDLS) at 16:20 and arrives New Bongaigaon station (NBQ) at 16:30. This train has 14 stoppages. Delhi to New Bongaigaon rajdhani fare is Rs.5635 in First AC, Rs.3435 in Second AC and Rs.2530 in Third AC for this train which includes meal charges also.

Delhi to New Bongaigaon DBRG RAJDHANI (20504) departs from New Delhi station (NDLS) at 11:25 and arrives New Bongaigaon station (NBQ) at 15:47. This train has 16 stoppages. Delhi to New Bongaigaon rajdhani fare is Rs.5800 in First AC, Rs.3530 in Second AC and Rs.2555 in Third AC for this train which includes meal charges also.

Delhi to New Bongaigaon DBRG RAJDHANI (20506) departs from New Delhi station (NDLS) at 11:25 and arrives New Bongaigaon station (NBQ) at 15:47. This train has 16 stoppages. Delhi to New Bongaigaon rajdhani fare is Rs.5680 in First AC, Rs.3470 in Second AC and Rs.2545 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 Delhi to New Bongaigaon - NDLS SCL EXP (14038) and PORVOTR S KRNTI (22450).

Delhi to New Bongaigaon NDLS SCL EXP (14038) departs from New Delhi station (NDLS) at 23:45 and arrives New Bongaigaon station (NBQ) at 03:25. This train has 8 stoppages. Delhi to New Bongaigaon sampark-kranti fare is Rs.4470 in First AC, Rs.2625 in Second AC, Rs.1810 in Third AC and Rs.680 in Sleeper for this train.

Delhi to New Bongaigaon PORVOTR S KRNTI (22450) departs from New Delhi station (NDLS) at 23:45 and arrives New Bongaigaon station (NBQ) at 03:25. This train has 9 stoppages. Delhi to New Bongaigaon sampark-kranti fare is Rs.4550 in First AC, Rs.2675 in Second AC, Rs.1860 in Third AC and Rs.710 in Sleeper for this train.