A nickname for a missionary:

The Sky Pilot, a novel by Ralph Connor.

"Sky Pilot", a 1968 song by Eric Burdon and The Animals utilizes a "sky pilot" figure who is interpreted as a military chaplain.

A common name for the wildflowers Polemonium viscosum and Polemonium eximium.

From the lingo of Labor movements -- A preacher who states that workers should not complain (see: Wobbly lingo). The concept possibly originated in Joe Hill's 1911 song "The Preacher and the Slave" in which he coined the term "pie in the sky" as preachers' replies to questions about hunger.

The Sky Pilot, a 1921 film directed by King Vidor