60s airline flight attendants are the new flappers
There's tons of amazing pictures here (four pages worth!) and here! Check out the "source" links on the second one for pages and pages more.
I think it's the retro gloss in the images combined with the thought of "the world couldn't possibly have been like this, could it?" that make them so compelling.
(That bubble helmet she's wearing is supposedly to protect her hair from the wind while moving between aircraft; I believe it makes a great ad image in any time period)