The Steven F. Udvar-Hazy Center near Washington Dulles International Airport is the companion facility to the Museum on the National Mall. The museum provides enough space for the Smithsonian to display the thousands of aviation and space artifacts that cannot be exhibited on the National Mall. The two sites together showcase the largest collection of aviation and space artifacts in the world.

14390 Air and Space Museum Parkway
Chantilly, Virginia 20151

Hours:
10:00 am – 5:30 pm
Extended Summer Hours
May 22 through Sept 6:
10:00 am – 6:30 pm
Some exceptions

http://www.nasm.si.edu/museum/udvarhazy/