St. Louis Union Station is open year round and hours depend on the Season:

March 1 through October 31
Monday through Saturday - 10 am - 9 pm
Sunday - 10 am - 6 pm

November 1 through the last day in February
Monday through Saturday - 11 am - 7:30 pm
Sunday - 11 am - 6 pm

Restaurant and entertainment venues may open earlier or close later that stated above.
Please call directly or check individual web site for individual hours.

St. Louis Union Station will be closed: Easter, Thanksgiving and Christmas Day

St. Louis Union Station will implement holiday hours on: Memorial Day, Independence Day, Labor Day, the day before Thanksgiving, Christmas Eve and New Year's Eve.