<prompt> Ukwakha inguqulo eyinkimbinkimbi yalesi sigwebo iFrontier Airlines yakhiwa ngokuhlanganiswa kwe-Arizona Airways, i-Challenger Airlines, ne-Monarch Airlines ngoJuni 1, 1950.  <response>: Yiqiniso, inguqulo eyinkimbinkimbi yomusho ithi Frontier Airlines kwakuyinkampani yezindiza eyakhiwa ngokuhlanganiswa kwe-Arizona Airways, i-Challenger Airlines, ne-Monarch Airlines ngoJuni 1, 1950, enezindlunkulu eStapleton Airport eDenver, eColorado. 