Originally Posted by
dragonrides
It sounds to me that the charge Air NZ was talking about is that you have to pay for a separate seat? Our experience, although our twins are just over 1 now, was that domestic flights in the US are free for kids under 2 unless they occupy a seat. International flight kids under 2 pay 10% of the adult fare, and over 2 under 11 (this may not be exact) can no longer get the infant on lap 10% fare, they have to buy their own seats, but only 75% of the adult fare not the full price.
I do not think you have to pay for bringing the car seats with you, however, the airlines are pretty innovative these days on posing new fees and charges, so yo have to call them directly. Usually I have to book our tickets first, then contact the airlines to give them our kids' passport number, date of birth and name information to pay for their fare separately, sometimes I can only book and reserve their tickets for them over the phone then pay at the airport. Those were with China Eastern and Delta. So we booked our domestic flight separately from the international portion to avoid the 10% of the domestic flight.
Outside the US, it's different, when we went to Thailand with the boys, both the Chinese airlines and Thai Air were charging close to the adult fare even though our kids do not occupy a seat.
We plan on getting the car seats when we get to NZ, simply because we couldn't bring our brand new ones from the US (when we made that move, we only used 6 pieces of luggages, incredible isn't it?), then we were in China, only to find the car seats are super expensive, about 3 times of the prices in the US. So we ended up having our friend bringing over the CARES Aviation Restraint System, it's essentially a child seat belt designed for flights, there are mixed reviews about it on Amazon, but we thought we would give it a try. It's the only one that's approved by FAA, and I believe it's approved by UK, New Zealand as well.
I really think they will have you check in your car seats as a piece of luggage without charging you but check with whatever airlines you are going with to make sure.