Directions to Union Street Flats Address: 176 Union Flats Blvd. Westfield, IN 46074 Cross Streets: E 171st St. and S Union St. in Westfield From Indianapolis: Follow I-465 N and take exit 31 for US-31 N. Head north and then take exit 131 for 161st Street. Turn right on 161st Street and then left on S Union Street. Union Street Flats will be 1 mile down on your left. From Downtown Westfield: Head south on S Union Street. Union Street Flats will be a half mile down on your right.