Depends on the Amtrak train:
Northeast Regional trains average about 4 hours (=/-)
Acela Express trains average about 3 hours (=/-)
(I checked the Amtrak Northeast Corridor timetable)
203.99 miles
stop
The distance from New York State to Washington State is around 2900 miles.
It is 204 miles from Washington D.C to New York, 328 kilometers from Washington to New York.
Train, bus and plane.
approx. 230 miles
Stamford is approximately 50 minutes from New York City via train.
Acela Express. It operates between Boston, New York, and Washington.
The driving distance is 226 miles, which takes about 4 and a half hours.
230 miles
Washington D.C. is closer to Houston, TX than New York, NY. The approximate distance between Houston and Washington D.C. is around 1,400 miles, while the distance between Houston and New York is approximately 1,500 miles. This is due to the geographical location of Washington D.C. being more southward in comparison to New York.
The total distance between Washington D.C and New York is 425 miles. It takes anything between 7 hours to 7 hours and 15 minutes to drive from New York to Washington D.C.