<prompt> Gadzira shanduro yakaoma zvikuru yemutsara uyu Frontier Airlines yakaumbwa kubva mukubatanidzwa kweArizona Airways, Challenger Airlines, uye Monarch Airlines pana June 1, 1950.  <response>: Zvechokwadi, shanduro yakaoma zvikuru yemutsara ndeyekuti Frontier Airlines yakanga iri ndege yakaumbwa nekubatanidzwa kweArizona Airways, Challenger Airlines, uye Monarch Airlines musi waJune 1, 1950, ine dzimbahwe paStapleton Airport muDenver, Colorado. 