pam am started getting its boeing 307s in march 1940. twa got its first 307 in april. twa used its 307s to fly from los angeles to new york city. pan am's flew from miami to latin america. ten 307s were made. three were given to pan am (named clipper flying cloud, clipper comet, and clipper rainbow) and five to twa (named comanche, cherokee, zuni, navajo, and apache). one went to howard hughes. the first 307 crashed.