Myrtle "Kay" Thompson Cagle (June 3, 1925 – December 22, 2019) was an American pilot and one of the Mercury 13 female astronauts group.

[1][4] Cagle went on to run an airport near Raleigh and her own charter plane service.

[6] Cagle began writing a column called "Air Currents" in 1946 for the Johnstonian Sun newspaper in Selma.

[2] Cagle went back to teaching students how to fly and also enrolled in Mercer University.

[1][8] In 1988, Cagle became the second woman to graduate with an airframe and powerplant mechanic's rating from the South Georgia Technical College.

[1][8] She was still flying her single-engine Cessna in 1998 at age 73, even though she had retired from teaching at Robins Air Force Base.

[13] In 2007, she and eight of the Mercury 13 graduates earned an honorary doctorate from the University of Wisconsin, Oshkosh.