Originally Posted by
twowhat?
this is exactly what we have done when our kids were those ages. Nothing on the plane (just made sure they had their lap belts snug on their hips whenever they were not up to use the bathroom). Packed the RideSafer bags in our carry-on luggage or a backpack so that we could be 100% guaranteed to have them when we land. They take a bit longer to buckle kids in, and it's less likely they can do it themselves, but the portability is well worth the small inconvenience. The other great thing about them is it's no problem to sit 3-across, which was so useful when they were younger and I felt better sitting in the back seat with them.
I'm also super hardcore car seat safety conscious but would be totally fine with a 40 lb 4-yo sitting in the plane with the plane lap belt...planes are just an entirely different beast than cars.
Big kids here too -- I think when DS1 was 4 he had no carseat but for DS2 we still had it as he was a handful and the car seat kept him contained but for a kid who will sit nicely I'd be fine without a carseat on the flight and check them.
DS #1 Summer 05
DS #2 Summer 07