In flying over 500 legs in my time as a consultant, I can tell you that some -- a small minority, but enough -- divorced (or possibly not even divorced) women in their 40s are extremely adventurous and very flirtatious with men, especially younger men, on flights.
Now is it any more than older men hit on younger women? No, probably more men do it, but percentage-wise, it's probably equal nowdays -- especially since more men of that age (I'm one of them) grew up in an age where sexual harassment has made us far more reserved.
I'm not one to judge. I only time I cared when they took my business class upgrade, because they were flirting with a young man I was supposed to be sitting next to in business class. Sometimes I just went back and waited for the open seat in coach that was left by her.
It happened more than once though.
