The distance between New York Penn Station and New York Union Square is walkable. The total distance on foot is 1.65 miles
The distance from Brookfield Illinois, home of the Brookfield Zoo, to Chicago is 12 miles. This is the distance from Union Station to the Brookfield Prairie Street train station.
Assuming you're in DC, that's 5 miles.
MARC Train to Union Station, Acela from Union Station to Manhattan
It's not far at all. You can get to the Capitol (The end of the Mall) in probably mess than a quarter of a mile from Union Station.
take the Q uptown get off after 2 stops
Take the Uptown 4 or 5 express trains (of the 4-5-6, the dark green line), 1 stop, from 14th Street-Union Square to 42nd Street-Grand Central Station.
There is a rail tunnel between Union Station and L'Enfant Plaza, used by trains heading southbound from Union Station.
Yes, the R train (of the N-R-Q-W, the yellow line) stops at the 14th Street/Union Square Station.
The shortest driving distance is 171 miles.
You can get from Dulles to Union Station by air. The average flight time is 49 minutes and the flight distance is 281 miles or 452 km.
There is a rail tunnel between Union Station and L'Enfant Plaza, used by trains heading southbound from Union Station.
Amtrak owns both penn station in New York, and Baltimore it is also the own of Union Square in Washington