Phyllis Winger
Not too long after this movie was released, Phyllis Winger, who played the flashback wife of the dying co-pilot, was selling real estate in LA
http://news.google.com/newspapers?nid=2194&dat=19531024&id=BT0vAAAAIBAJ&sjid=790FAAAAIBAJ&pg=3910,5000713
Wonder what happened to her? She was apparently a starlet celebrity in those days, sometimes paired with Rock Hudson.