Lockheed L-188.. The last PROP airplane for most airlines. Then the JET age begins.

Turboprop airliner
National origin	United States
Manufacturer	Lockheed Corporation
First flight	December 6, 1957
Introduction	1959
Status	In limited use[1]
Primary users	American Airlines Eastern Air Lines Braniff Airways National Airlines
Produced	1957–61
Number built	170
Variants	Lockheed P-3 Orion