Anonymous wrote:I look for nonstop and not too expensive and not too crazy a time at either end and by then my choices are pretty narrow
With multiple, kids, this.
If only one child, I prefer a flight that departs around 9 or 10am and am okay with stopovers, especially if I can line them up well with food. Airports are actually fun places for a child who is not overtired or over hungry, and you can make the experience pretty enjoyable by letting them pick reading material or activities at the bookstore, buying food you don't eat that often, etc. And younger kids and non-jaded older kids can be interested in and entertained by the air travel part -- I've passed many a pre-boarding period watching the tarmac workers load or unload luggage (playing "look for our suitcase"), watching planes take of and land, taxi around, or identifying all the different strange vehicles they use to fuel and stock commercial aircraft.
But with two kids, it's good to minimize stops and airport time because of the extra variables. I'd avoid overnight flight with those ages unless they are excellent sleepers when they travel -- I've somehow managed to never have to hang out with a cranky child on an airplane at 3am, and I'd like to keep that streak alive.