Frontier airlines Ground breaking ceremonies for , on complex at Stapleton. 1967 To merge with Central Airlines of Ft. Worth. RMN My 5, 1967 P-95 Post My 5, 1967 p.65 Merger with Central Airlines approved by stockholders. RMN Jl 27, 1967 p.53 Post Jl 27, 1967 p.27 Merger of Frontier Airlines of Denver and Central Airlines of Fort Worth makes company nation's 40 largest domestic carrier. 1967