5 months old. :dazzle: yeah. Then again at 13 months, 18 months and so on...
We just kept her on our laps for the first flight, since it was full, and the flight prices are sooo $$$. Really, since you're all screwed anyways if something happens to the plane, I didn't worry too much. Anyways, I'm glad we did, since she wouldn't have liked to be strapped down at that age. She felt much safer in my arms.
however you should be aware -on our later flights, we didn't buy a seat for her, but she got one anyways, since the flight wasn't full. So bring your carseat to the gate with you just in case. Ask at the counter if it's full. If it IS, then you can gate check your carseat (and stroller too) so it's no big deal.
This past trip was the first time she was a paying customer. :lol: