I'm really curious since nobody answered in the first place, but how much would any of you wanting no-kid flights pay for such a flight? It will cost a premium over comparable flights, would you actually take the more expensive flight with no kids or keep the cheaper one and hope for no annoying kids?
Well, if you're like me half the time I'm travelling on someone else's dime (my boss), and last time I was mockingly chastized for staying at a budget roach closet instead of the $229 a night place he chose. Never mind that I was slightly closer to one convention center and significantly closer to the other one and ended up spending only $79 a night. Well, there was one other benefit of where I stayed but that was more luck and coincidence
EDIT - How did my post start off on airfare and move to hotel accomidations?
Oh yeah...if someone else is paying for the trip, I'd take a childless flight. Thankfully the only poor flight experience had more to do with the fact I'm almost 6'1" and I felt like my knees where going to get jammed into my hips.
2nd edit - I'm a cheap bastard when it comes to my own money. I'd have to deal with an annoying kid first, but I'm also the type to tell a parent to do their job and get quite nasty if they give me lip back.