Answered on Quora.
Absolutely.
Anecdotal evidence (see other responses) shows that at least 50% of male flight attendants are gay and possibly a majority of them are. One commenter says 95% of the male flight attendants he knew were gay, and another says that 50% of the ones she knew were gay. So call it 70–75% for now.
It’s just one of those jobs that attracts a lot of gay men. And for that same reason, the fact that it is a job associated with gay men, it probably scares a lot of straight men away from it.
That said, one of my best friends went off to be a flight attendant a few years after high school, and he was straight as Hell and quite homophobic too, I might add.